JP5919531B2 - Energy management device, energy management system and program - Google Patents

Description

  The present invention relates to an energy management device, an energy management system, and a program used for a system that supplies power to a load using a power storage device including a storage battery and a commercial power system.

  Conventionally, in order to prevent exceeding the contract power, a system having a function of notifying that the contract power is exceeded or disconnecting a predetermined device or branch circuit when the contract power is exceeded is known. (See, for example, Patent Document 1).

  In addition, technologies and products related to energy management using energy state display, solar power generation, and storage batteries are known for the main purpose of reducing electricity charges.

JP 2003-158825 A

  However, the conventional system aims to prevent the breakage of the power contract unit that exceeds the contract power and to reduce the electricity bill for the next fiscal year. As a member of society, the power situation has deteriorated recently. It was not a compatible system.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an energy management device, an energy management system, and a program capable of improving the power situation.

The energy management device of the present invention is an energy management device used in a system that supplies power to a load using a power storage device including a storage battery and a commercial power system, and sets a power assist time zone for discharging the storage battery, A setting unit that sets the magnitude of output power of the power storage device in the power assist time zone as a discharge amount, and the storage battery is discharged in the power assist time zone so that the output power becomes the discharge amount. A control unit that controls the power storage device, and a forecast acquisition unit that obtains an electric forecast representing a result predicted at every predetermined timing for commercial power and demand power of the commercial power system, and the setting unit includes the The power assist time zone is set using the electricity forecast acquired by the forecast acquisition unit, and the power assist time zone is set. Te, and setting the pre-Symbol discharge amount so purchased electricity amount purchased electricity from the power company is constant.

The energy management device of the present invention is an energy management device used in a system that supplies power to a load using a power storage device including a storage battery and a commercial power system, and sets a power assist time zone for discharging the storage battery, A setting unit that sets the magnitude of output power of the power storage device in the power assist time zone as a discharge amount, and the storage battery is discharged in the power assist time zone so that the output power becomes the discharge amount. A control unit that controls the power storage device, and a forecast acquisition unit that obtains an electric forecast representing a result predicted at every predetermined timing for commercial power and demand power of the commercial power system, and the setting unit includes the The power assist time zone is set using the electricity forecast acquired by the forecast acquisition unit, and the power assist time zone is set. Te, wherein the amount of power sold to sell electricity to the power company to set the pre-Symbol discharge amount to be constant.

The energy management device of the present invention is an energy management device used in a system that supplies power to a load using a power storage device including a storage battery and a commercial power system, and sets a power assist time zone for discharging the storage battery, A setting unit that sets the magnitude of output power of the power storage device in the power assist time zone as a discharge amount, and the storage battery is discharged in the power assist time zone so that the output power becomes the discharge amount. A control unit that controls the power storage device, and a forecast acquisition unit that obtains an electric forecast representing a result predicted at every predetermined timing for commercial power and demand power of the commercial power system, and the setting unit includes the The power assist time zone is set using the electricity forecast acquired by the forecast acquisition unit, and the power assist time zone is set. Te, and setting the pre-Symbol discharge amount so purchased electricity amount purchased electricity from the power company is increasing or decreasing.

The energy management device of the present invention is an energy management device used in a system that supplies power to a load using a power storage device including a storage battery and a commercial power system, and sets a power assist time zone for discharging the storage battery, A setting unit that sets the magnitude of output power of the power storage device in the power assist time zone as a discharge amount, and the storage battery is discharged in the power assist time zone so that the output power becomes the discharge amount. A control unit that controls the power storage device, and a forecast acquisition unit that obtains an electric forecast representing a result predicted at every predetermined timing for commercial power and demand power of the commercial power system, and the setting unit includes the The power assist time zone is set using the electricity forecast acquired by the forecast acquisition unit, and the power assist time zone is set. Te, and setting the pre-Symbol discharge amount so amount of power sold to sell electricity to the power company is increasing or decreasing.

  The energy management system of the present invention includes the energy management device and a power storage device including a storage battery.

The program according to the present invention is used in a system that supplies power to a load using a power storage device including a storage battery and a commercial power system, and controls a discharge of the storage battery to cause a computer to discharge the storage battery. And a setting unit for setting the magnitude of the output power of the power storage device in the power assist time zone as a discharge amount, the storage battery is discharged in the power assist time zone, and the output power becomes the discharge amount. The control unit that controls the power storage device, and the computer functioning as a forecast acquisition unit that obtains an electric forecast representing a result predicted at every predetermined timing for commercial power and demand power of the commercial power system, As the setting unit, the power assist time zone is set using the electric forecast acquired by the forecast acquisition unit. So, in the power assist hours, a program for purchased power amount of purchased electricity from the power company to set the pre-Symbol discharge amount to be constant.
The program according to the present invention is used in a system that supplies power to a load using a power storage device including a storage battery and a commercial power system, and controls a discharge of the storage battery to cause a computer to discharge the storage battery. And a setting unit for setting the magnitude of the output power of the power storage device in the power assist time zone as a discharge amount, the storage battery is discharged in the power assist time zone, and the output power becomes the discharge amount. The control unit that controls the power storage device, and the computer functioning as a forecast acquisition unit that obtains an electric forecast representing a result predicted at every predetermined timing for commercial power and demand power of the commercial power system, As the setting unit, the power assist time zone is set using the electric forecast acquired by the forecast acquisition unit. So, in the power assist hours, a program for power sale amount to sell electricity to the power company to set the pre-Symbol discharge amount to be constant.
The program according to the present invention is used in a system that supplies power to a load using a power storage device including a storage battery and a commercial power system, and controls a discharge of the storage battery to cause a computer to discharge the storage battery. And a setting unit for setting the magnitude of the output power of the power storage device in the power assist time zone as a discharge amount, the storage battery is discharged in the power assist time zone, and the output power becomes the discharge amount. The control unit that controls the power storage device, and the computer functioning as a forecast acquisition unit that obtains an electric forecast representing a result predicted at every predetermined timing for commercial power and demand power of the commercial power system, As the setting unit, the power assist time zone is set using the electric forecast acquired by the forecast acquisition unit. So, in the power assist hours, a program for setting the pre-Symbol discharge amount so purchased electricity amount purchased electricity from the power company is increasing or decreasing.
The program according to the present invention is used in a system that supplies power to a load using a power storage device including a storage battery and a commercial power system, and controls a discharge of the storage battery to cause a computer to discharge the storage battery. And a setting unit for setting the magnitude of the output power of the power storage device in the power assist time zone as a discharge amount, the storage battery is discharged in the power assist time zone, and the output power becomes the discharge amount. The control unit that controls the power storage device, and the computer functioning as a forecast acquisition unit that obtains an electric forecast representing a result predicted at every predetermined timing for commercial power and demand power of the commercial power system, As the setting unit, the power assist time zone is set using the electric forecast acquired by the forecast acquisition unit. So, in the power assist hours, a program for setting the pre-Symbol discharge amount so amount of power sold to sell electricity to the power company is increasing or decreasing.

  According to the present invention, the power situation can be improved by setting the power assist time zone and the discharge amount.

It is a block diagram which shows the structure of the energy management system which concerns on Embodiment 1. FIG. It is a block diagram which shows the internal structure of the energy management apparatus which concerns on the same as the above. It is a block diagram which shows the internal structure of the power conditioner which concerns on the same as the above. It is a block diagram which shows the internal structure of the electricity distribution panel and electric power measurement unit which concern on the same as the above. It is a block diagram which shows the internal structure of the electrical storage apparatus which concerns on the same as the above. It is a block diagram which shows the internal structure of the indicator which concerns on the same as the above. It is a figure which shows the registration screen of the indicator which concerns on the same as the above. It is a block diagram which shows the internal structure of the energy management apparatus which concerns on Embodiment 2. FIG. It is a block diagram which shows the internal structure of the energy management apparatus which concerns on Embodiment 3. FIG. It is a figure which shows the generated electric power predicted value storage area which concerns on the same as the above. It is a figure which shows the use electric power predicted value storage area which concerns on the same as the above. It is a figure which shows the past generation electric power storage area which concerns on the same as the above. It is a figure which shows the past electric power storage area which concerns on the same as the above. It is a figure for demonstrating operation | movement of the energy management system which concerns on the same as the above. It is a figure for demonstrating operation | movement of the energy management system which concerns on Embodiment 5. FIG. It is a figure for demonstrating operation | movement of the energy management system which concerns on Embodiment 7. FIG.

(Embodiment 1)
As shown in FIG. 1, the energy management system 1 according to the first embodiment includes an energy management device (controller) 2 and a power storage device 3 including a storage battery (battery block) 31. The energy management system 1 includes a solar cell panel 41 that performs grid connection, and a power conditioner 42 that converts DC power generated by the solar cell panel 41 into AC power. Furthermore, the energy management system 1 includes a distribution board 51 that divides AC power, a power measurement unit 52 that measures various powers in the distribution board 51, and a display 6 that displays various information. . A center server 7 is connected to the energy management device 2 via a network (not shown).

  The energy management system 1 of the present embodiment is installed in a dwelling unit that is a detached house, and includes a plurality of (in the illustrated example, two) loads 91 using the power storage device 3, the solar battery panel 41, and the commercial power system 8. 91 is a system for supplying power to 91. The load 91 is powered by being connected to the outlet 92.

  The solar cell panel 41 is installed on the roof of a dwelling unit in a state where a plurality of solar cells are connected side by side, and generates direct-current power by solar power generation using solar energy.

  As shown in FIG. 3, the power conditioner 42 includes a DA converter 421 and a conditioner-side control unit 422. The DA converter 421 converts DC power, which is generated power (power generation amount) of the solar cell panel 41, into AC power in accordance with an instruction from the conditioner-side control unit 422. The conditioner-side control unit 422 controls the DA converter 421 using a CPU (Central Processing Unit) as a main component. For example, the conditioner-side control unit 422 performs cooperative control with the commercial power system 8 (see FIG. 1).

  As shown in FIG. 4, the distribution board 51 includes a main breaker 511 and a plurality of (two in the illustrated example) branch breakers 512 and 512. Main breaker 511 acquires AC power from power storage device 3, power conditioner 42, and commercial power system 8, and outputs the AC power to each branch breaker 512. The branch breaker 512 supplies power to the load 91 connected via the outlet 92.

  The power measurement unit 52 includes a first current detection unit 521, a second current detection unit 522, a third current detection unit 523, a unit side control unit 524, and a unit side communication unit 525. . The first current detection unit 521 detects a current flowing in the main circuit on the input side of the main circuit breaker 511. Second current detection unit 522 detects the current from power storage device 3. The third current detection unit 523 detects a current from the power conditioner 42. The unit-side control unit 524 has a CPU as a main component, a function of calculating power of the main circuit, that is, total power used from the current detected by the first current detection unit 521, and detection by the second current detection unit 522 A function of calculating charge / discharge power of the power storage device 3 (storage battery 31) from the measured current, and a function of calculating generated power of the solar cell panel 41 from the current detected by the third current detection unit 523. Yes. The unit-side communication unit 525 transmits the power used, the charge / discharge power of the storage battery 31 and the generated power of the solar battery panel 41 to the energy management device 2 in accordance with an instruction from the unit-side control unit 524.

  As shown in FIG. 5, the power storage device 3 includes a storage battery 31, an AD converter 32, a DA converter 33, a power storage device side communication unit 34, and a charge / discharge control unit 35. The storage battery 31 is, for example, a nickel-cadmium battery, a nickel metal hydride battery, a lithium ion battery, or a lead storage battery, and stores the generated power of the solar battery panel 41 (see FIG. 1) and the commercial power of the commercial power system 8 (see FIG. 1). be able to. The AD converter 32 converts AC power from the distribution board 51 into DC power in accordance with instructions from the charge / discharge control unit 35 during charging. The DA converter 33 converts DC power from the storage battery 31 into AC power in accordance with an instruction from the charge / discharge control unit 35 during discharging. The power storage device side communication unit 34 has a function of communicating with the energy management device 2 and transmits information related to the remaining battery level of the storage battery 31 to the energy management device 2, while receiving a control signal related to charge / discharge control from the energy management device 2. Receive. The charge / discharge control unit 35 monitors the remaining battery level of the storage battery 31 and controls the AD converter 32 and the DA converter 33 in accordance with a control signal from the energy management device 2.

  As shown in FIG. 6, the display device 6 includes a display-side storage unit 61, a monitor unit 62, an operation unit 63, a display-side communication unit 64, and a display-side control unit 65. The display-side storage unit 61 stores registration screen data. The monitor unit 62 is, for example, a liquid crystal display (LCD) or an organic EL (Electro-Luminescence) display, and information from the energy management device 2 and registration stored in the display-side storage unit 61. Screen data is acquired and a registration screen 66 (see FIG. 7) is displayed. The registration screen 66 displayed on the monitor unit 62 includes items for inputting a power assist time zone and a discharge amount in the power assist time zone (“power assist amount” in FIG. 7). The operation unit 63 is, for example, a plurality of operation buttons or a touch panel, and is used when a user inputs an instruction to the energy management device 2. Various instructions are input to the operation unit 63 by a user input operation. For example, the power assist time zone and the discharge amount are input to the operation unit 63 by an input operation. The display-side communication unit 64 has a function of communicating with the energy management device 2 and transmits input information input from the operation unit 63 to the energy management device 2. The display-side control unit 65 controls various functions of the display 6.

  The energy management device 2 includes a computer (including a microcomputer) on which a CPU and a memory are mounted as main components, and as illustrated in FIG. 2, a first communication unit 21, a second communication unit 22, 3 communication unit 23, fourth communication unit 24, controller-side storage unit 25, timing unit 26, and processing device 27.

  The first communication unit 21 has a function of communicating with the power measurement unit 52, and receives information about the power used, the charge / discharge power of the storage battery 31, and the generated power of the solar battery panel 41 from the power measurement unit 52. The second communication unit 22 has a function of communicating with the power storage device 3, receives information related to the remaining battery level of the storage battery 31 from the power storage device 3, and transmits a control signal related to charge / discharge control to the power storage device 3. The third communication unit 23 has a function of communicating with the display device 6 and receives input information input to the display device 6. The fourth communication unit 24 has a function of communicating with the center server 7 via a network (not shown).

  The controller-side storage unit 25 includes a time zone storage area 251 and a discharge amount storage area 252. The time zone storage area 251 stores information on the power assist time zone. In the discharge amount storage area 252, information on the discharge amount of the power storage device 3 is stored. The controller-side storage unit 25 also stores various information and programs other than those described above.

  The clock unit 26 is, for example, an RTC (Real Time Clock), and clocks the current time.

  The processing device 27 controls the energy management device 2 as a whole by operating according to a program stored in the controller-side storage unit 25 using a CPU mounted on the computer as a main component. For example, the processing device 27 realizes functions of a setting unit 271 and a control unit 272 described later.

  The setting unit 271 sets a power assist time zone in which the storage battery 31 is discharged in accordance with input information to the display 6 and sets the magnitude of the output power of the power storage device 3 in the power assist time zone as a discharge amount.

  The control unit 272 controls the power storage device 3 so that the storage battery 31 is discharged during the power assist time period set by the setting unit 271 and the output power of the power storage device 3 becomes the discharge amount set by the setting unit 271.

  The controller-side storage unit 25 stores programs for the energy management device 2 that is a computer to execute various functions. That is, the controller-side storage unit 25 stores a program for causing the processing device 27 of the energy management device 2 to function as the setting unit 271 and the control unit 272.

  Next, operation | movement of the energy management system 1 which concerns on this embodiment is demonstrated using FIG.

  First, the energy management device 2 controls the display device 6 so that the display device 6 displays the registration screen 66, and the display device 6 displays the registration screen 66 on the monitor unit 62 according to the instruction of the energy management device 2. . Thereafter, the user uses the electric forecast obtained from the outside via a network, for example, while looking at the registration screen 66 displayed on the monitor unit 62, from the operation unit 63 of the display unit 6, the power assist time zone and the discharge amount. Enter. After the user's input operation, the setting unit 271 of the energy management device 2 sets the power assist time zone and the discharge amount.

  The electric forecast represents the result of prediction for commercial power and demand power of the commercial power system 8 at every predetermined timing. Specifically, the electricity forecast is based on the predicted power usage and the power company in the power supply area of the power company, such as the ratio of the expected power usage in the power supply area of the power company to the power supplied from the power company. This represents the power supplied to each other. The electric forecast is transmitted from an electric power company or an organization other than the electric power company. The electricity forecast may be a prediction result for the commercial power amount and the demand power amount for a predetermined time.

  After that, when the start time of the power assist time zone comes, the energy management device 2 controls the power storage device 3 so that the storage battery 31 is discharged with the set discharge amount. The power storage device 3 discharges the storage battery 31 according to the instruction of the energy management device 2.

  In the energy management system 1 of the present embodiment described above, since the storage battery 31 can be discharged during a time zone required by the power company, the amount of power purchased is reduced or the amount of power sold is increased during the time zone. As a result, as a social member, it can contribute to the improvement of the power situation. For example, by using an electric forecast representing a prediction result of commercial power and demand power of the commercial power system 8, the storage battery 31 can be discharged in a time zone required by the power company.

(Embodiment 2)
The energy management system 1 according to the second embodiment is different from the energy management system 1 according to the first embodiment in that the energy management device 2 acquires an electric forecast and automatically sets a power assist time zone and a discharge amount. In addition, about the component similar to the energy management system 1 of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 8, the processing device 27 of the energy management device 2 of the present embodiment has a function of a forecast acquisition unit 273 that acquires an electrical forecast from the outside (for example, the center server 7 or the like) via a network. .

  The setting unit 271 of this embodiment sets the power assist time zone and the discharge amount using the electric forecast acquired by the forecast acquisition unit 273. In addition, about the component similar to the setting part 271 of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  Next, operation | movement of the energy management system 1 which concerns on this embodiment is demonstrated using FIG.

  First, the energy management device 2 acquires an electric forecast from the outside such as the center server 7. After acquiring the electricity forecast, the energy management device 2 sets the power assist time zone and the discharge amount using the electricity forecast.

  After that, when the start time of the power assist time zone comes, the energy management device 2 controls the power storage device 3 so that the storage battery 31 is discharged with the set discharge amount. The power storage device 3 discharges the storage battery 31 in accordance with instructions from the energy management device 2.

  In the energy management system 1 of the present embodiment described above, the discharge amount of the power storage device 3 in the power assist time zone and the power assist time zone can be set without a user input operation.

  As a modification of the present embodiment, the forecast acquisition unit 273 may acquire information related to at least one of the power assist time zone and the discharge amount from the outside via a network. In the case of this modification, the setting unit 271 sets the power assist time zone and the discharge amount using the information acquired by the forecast acquisition unit 273.

(Embodiment 3)
The energy management system 1 according to the third embodiment is different from the energy management system 1 according to the second embodiment in that the power storage device 3 is controlled so that the amount of power purchased from the power company is constant in the power assist time period. Is different. In addition, about the component similar to the energy management system 1 of Embodiment 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The energy management device 2 of the present embodiment does not set the discharge amount of the power storage device 3 in the power assist time period according to user input information, but sets the power purchase amount to be constant.

As shown in FIG. 9, the controller-side storage unit 25 of the present embodiment includes a generated power predicted value storage area 253, a predicted used power storage area 254, a past generated power storage area 255, and a past used power storage area 256. And further.
As shown in FIG. 10, the generated power predicted value storage area 253 stores a table indicating the predicted value of generated power per unit time (for example, 1 minute). As shown in FIG. 11, the used power predicted value storage area 254 stores a table indicating the predicted value of used power for each unit time (for example, one minute). As shown in FIG. 12, the past generated power storage area 255 stores a table indicating past generated power. The past used power storage area 256 stores a table indicating past used power as shown in FIG.

  The processing device 27 of the present embodiment functions as an information acquisition unit 274 that acquires power generation information related to the generated power of the solar cell panel 41 in the power assist time zone.

  The setting unit 271 of the present embodiment uses the power generation information acquired by the information acquisition unit 274 to continuously or at predetermined time intervals so that the power purchase amount becomes constant at the target power purchase amount in the power assist time zone. The discharge amount of the power storage device 3 is set. Note that a description of the same functions as those of the setting unit 271 of the second embodiment is omitted.

  The target power purchase amount is determined as follows. First, the controller-side storage unit 25 accumulates the used power measured by the power measuring unit 52 so far in the past used power storage area 256. The setting unit 271 calculates the target power purchase amount shown in Equation 1 according to the average value (average power consumption) of power consumption for a predetermined period accumulated in the past power consumption storage area 256.

なお、Ｔｓは電力アシスト時間帯の開始時刻、Ｔｅは電力アシスト時間帯の終了時刻、Ｗｕは単位時間あたりの使用電力の予測値、Ｗｐｖは単位時間あたりの太陽電池パネル４１の発電予測量であり、Ｃｓは蓄電装置３の放電量であり、ＷｕおよびＷｐｖは過去の同一の電力アシスト時間帯に含まれる各時刻での例えば１周間の平均である。

Ts is the start time of the power assist time zone, Te is the end time of the power assist time zone, Wu is the predicted value of power used per unit time, and Wpv is the predicted power generation amount of the solar cell panel 41 per unit time. , Cs is the amount of discharge of the power storage device 3, and Wu and Wpv are the averages of, for example, one round at each time included in the same power assist time period in the past.

  The setting unit 271 obtains a difference between the used power measured by the power measuring unit 52 and the generated power of the solar battery panel 41 continuously or at predetermined time intervals in the power assist time period, and this difference and the target power purchase amount Is used to set the discharge amount of the power storage device 3 in the power assist time zone. That is, the setting unit 271 selects [(power used at actual time) − (power generated by the solar cell panel 41 at actual time)} − target power purchase amount continuously or at predetermined time intervals in the power assist time zone. Is set as the discharge amount of the power storage device 3.

  Next, the operation of the energy management system 1 according to the present embodiment will be described.

  First, the energy management device 2 sequentially stores information on the used power sent from the power measurement unit 52 in the past used power storage area 256 for a certain period of time, and stores information on the generated power of the solar panel 41 in the past generated power storage area. 255 is sequentially stored for a certain period. After that, when the power assist time zone is set, the predicted value of the used power in the power assist time zone is stored in the used power predicted value storage area 254 as an average value of a certain period in the past, for example, and the generated power of the solar cell panel 41 is stored. Is stored in the generated power predicted value storage area 253 as an average value in a past fixed period, for example.

  Thereafter, when the start time of the power assist time zone comes, the energy management device 2 calculates a target power purchase amount that becomes constant by discharging the remaining amount of the storage battery 31 at the start time, and further sets the discharge amount. Then, the power storage device 3 is instructed to discharge the storage battery 31 with this discharge amount. The power storage device 3 discharges the storage battery 31 according to the instruction of the energy management device 2. When the discharge amount is a negative value, the storage battery 31 may store electricity.

  FIG. 14 shows the amount of power purchased ((a) in FIG. 14), the power used ((b) in FIG. 14), and the solar cell panel 41 between the start time t1 and the end time t2 of the power assist time period. The relationship between generated electric power ((c) of FIG. 14) and the discharge amount of the electrical storage apparatus 3 ((d) of FIG. 14) is shown. The storage battery 31 is discharged so that the amount of power purchased is constant during the power assist time period.

  In the energy management system 1 of this embodiment demonstrated above, the fluctuation amount of a demand can be reduced for an electric power company by stabilizing the amount of power purchase.

  If the forecast is significantly different, there is a possibility that the power purchase amount cannot be made constant. However, the correction can be made by repeating the calculation of the target power purchase amount at regular intervals.

  As a modification of the present embodiment, the controller-side storage unit 25 may store a target power purchase amount in advance. In the case of this modification, the setting unit 271 uses the power consumption measured by the power measurement unit 52, the generated power of the solar battery panel 41, and the target power purchase amount stored in the controller-side storage unit 25 to use power assist. The discharge amount of the power storage device 3 in the time zone is set.

(Embodiment 4)
The energy management system 1 according to the fourth embodiment is different from the energy management system 1 according to the third embodiment in that the power storage device 3 is controlled so that the amount of power sold to the power company is constant. In addition, about the component similar to the energy management system 1 of Embodiment 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The setting unit 271 of the present embodiment sets the discharge amount of the power storage device 3 continuously or at predetermined time intervals so that the power sale amount becomes constant at the target power sale amount during the power assist time period. Note that a description of the same functions as those of the setting unit 271 of the third embodiment is omitted.

  The target power sales amount is determined as follows. First, the controller-side storage unit 25 accumulates the used power measured by the power measuring unit 52 so far in the past used power storage area 256. The setting unit 271 obtains the target power sales amount shown in Equation 2 according to the average value (average power usage) of power usage for a predetermined period accumulated in the past power usage storage area 256.

なお、Ｔｓは電力アシスト時間帯の開始時刻、Ｔｅは電力アシスト時間帯の終了時刻、Ｗｕは単位時間あたりの使用電力の予測値、Ｗｐｖは単位時間あたりの太陽電池パネル４１の発電予測量であり、Ｃｓは蓄電装置３の放電量であり、ＷｕおよびＷｐｖは過去の同一の電力アシスト時間帯に含まれる各時刻での例えば１周間の平均である。

Ts is the start time of the power assist time zone, Te is the end time of the power assist time zone, Wu is the predicted value of power used per unit time, and Wpv is the predicted power generation amount of the solar cell panel 41 per unit time. , Cs is the amount of discharge of the power storage device 3, and Wu and Wpv are the averages of, for example, one round at each time included in the same power assist time period in the past.

  The setting unit 271 obtains a difference between the used power measured by the power measuring unit 52 and the generated power of the solar battery panel 41 continuously or at predetermined time intervals in the power assist time period, and calculates the difference as the target power sales amount. The amount subtracted from is set as the discharge amount of the power storage device 3 in the power assist time zone. That is, in the power assist time zone, the setting unit 271 selects [target power sales amount − {(power generation power of the solar cell panel 41 at actual time) − (power used at actual time)] continuously or at predetermined time intervals. }] Is set as the discharge amount of the power storage device 3.

  Next, the operation of the energy management system 1 according to the present embodiment will be described.

  First, the energy management device 2 sequentially stores information on the used power sent from the power measurement unit 52 in the past used power storage area 256 for a certain period of time, and stores information on the generated power of the solar panel 41 in the past generated power storage area. 255 is sequentially stored for a certain period. After that, when the power assist time zone is set, the predicted value of the used power in the power assist time zone is stored in the used power predicted value storage area 254 as an average value of a certain period in the past, for example, and the generated power of the solar cell panel 41 is stored. Is stored in the generated power predicted value storage area 253 as an average value in a past fixed period, for example.

  Thereafter, when the start time of the power assist time zone comes, the energy management device 2 calculates a target power sale amount that becomes constant by discharging the remaining amount of the storage battery 31 at the current time, and further sets the discharge amount. Then, the power storage device 3 is instructed to discharge the storage battery 31 with this discharge amount. The charge / discharge control unit 35 of the power storage device 3 discharges the storage battery 31 in accordance with an instruction from the energy management device 2. When the discharge amount is a negative value, the storage battery 31 may store electricity.

  In the energy management system 1 of the present embodiment described above, by stabilizing the amount of power sold, the power company can be expected as a stable supply source with little fluctuation. For example, for a power company, the solar cell panel 41 of a dwelling unit can be expected as a stable supply source with little fluctuation due to weather.

  If the prediction is significantly different, there is a possibility that the power sales amount cannot be made constant. However, the correction can be made by repeating the calculation of the target power sales amount at regular intervals.

  As a modification of the present embodiment, the controller-side storage unit 25 may store a target power sale amount in advance. In the case of this modification, the setting unit 271 uses the power consumption measured by the power measurement unit 52, the generated power of the solar battery panel 41, and the target power sales amount stored in the controller-side storage unit 25 to use power assist. The discharge amount of the power storage device 3 in the time zone is set.

(Embodiment 5)
The energy management system 1 according to the fifth embodiment is different from the energy management system 1 according to the third embodiment in that the power storage device 3 is controlled so as to gradually increase the amount of power purchased from the electric power company. In addition, about the component similar to the energy management system 1 of Embodiment 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The setting unit 271 according to the present embodiment sets the discharge amount of the power storage device 3 continuously or at predetermined time intervals so that the power purchase amount gradually increases during the power assist time period. Note that a description of the same functions as those of the setting unit 271 of the third embodiment is omitted.

  First, the controller-side storage unit 25 accumulates the used power measured by the power measuring unit 52 so far in the past used power storage area 256. The setting unit 271 obtains a target power purchase amount characteristic according to the average value (average used power) of the used power for a predetermined period accumulated in the past used power storage area 256.

  The target power purchase amount characteristic is a characteristic that gradually increases at a constant rate with the power purchase amount at the start of the power assist time period as a minimum value and the power purchase amount at the end as a maximum value. Since the total discharge amount of the power storage device 3 in the power assist time zone is the same as in the third embodiment, the power purchase amount at the start time of the power assist time zone is “0”, and the power purchase amount at the end time is “target power purchase amount”. The straight line connecting the two points is set as the incremental power purchase target value at each time in the power assist time zone.

  The setting unit 271 calculates the difference between the used power measured by the power measuring unit 52 and the generated power of the solar battery panel 41 using the target power purchase amount characteristic continuously or at predetermined time intervals in the power assist time zone. The difference between the difference and the gradually increasing power purchase target value on the target power purchase amount characteristic is set as the discharge amount of the power storage device 3. In other words, the setting unit 271 selects {{(power used at actual time) − (power generated by the solar cell panel 41 at actual time)}} − incremental power purchases continuously or at predetermined time intervals in the power assist time period. Target value] is set as the amount of discharge of power storage device 3.

  FIG. 15 shows the amount of power purchased ((a) in FIG. 15), the power used ((b) in FIG. 15), and the solar cell panel 41 between the start time t11 and the end time t12 in the power assist time period. The relationship between generated electric power ((c) of FIG. 15) and the discharge amount of the electrical storage apparatus 3 ((d) of FIG. 15) is shown. The storage battery 31 is discharged so that the amount of power purchased gradually increases during the power assist time period.

  In the energy management system 1 according to the present embodiment described above, the amount of electricity stored in the power storage device 3 is set so as to gradually increase the amount of power purchased, thereby reducing the power saving situation of the non-HEMS (Home Energy Management System) house (at the beginning of the tight time period). The power purchase control corresponding to the situation where power saving is made) can be realized.

  Note that, as a modification of the present embodiment, the power purchase amount may be gradually reduced. In the case of this modification, the setting unit 271 uses, as the target power purchase amount characteristic, a characteristic that gradually decreases at a constant rate with the power purchase amount at the start of the power assist time period as a maximum value and the power purchase amount at the end as a minimum value. Since the discharge amount of the power storage device 3 in the power assist time zone is the same as in the third embodiment, the power purchase amount at the start time of the power assist time zone is “twice the target power purchase amount”, and the power purchase amount at the end time is “0” is set, and a straight line connecting the two points is set as a target for gradually decreasing power purchase at each time in the power assist time zone. In such an energy management system 1 of this modified example, by setting the discharge amount of the power storage device 3 so that the amount of power purchased gradually decreases, the power saving situation of non-HEMS houses (many people have missed the electric forecast, Power purchase control corresponding to the situation where power is saved in the second half of the time zone can be realized.

  Further, the energy management device 2 may store the target power purchase amount characteristic in advance in the controller-side storage unit 25 instead of obtaining the target power purchase amount characteristic.

(Embodiment 6)
The energy management system 1 according to the sixth embodiment is different from the energy management system 1 according to the fourth embodiment in that the power storage device 3 is controlled so as to gradually increase the amount of power sold to the power company. In addition, about the component similar to the energy management system 1 of Embodiment 4, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The setting unit 271 according to the present embodiment sets the discharge amount of the power storage device 3 continuously or at predetermined time intervals so that the power sale amount gradually increases during the power assist time period. Note that a description of the same functions as those of the setting unit 271 of the fourth embodiment will be omitted.

  First, the controller-side storage unit 25 accumulates the used power measured by the power measuring unit 52 so far in the past used power storage area 256. The setting unit 271 obtains a target power sale amount characteristic according to the average value (average used power) of the used power for a predetermined period accumulated in the past used power storage area 256.

  The target power sale amount characteristic is a characteristic that gradually increases at a constant rate with the power sale amount at the start of the power assist time period as a minimum value and the power sale amount at the end as a maximum value. Since the total discharge amount of the power storage device 3 in the power assist time zone is the same as in the fourth embodiment, the power sale amount at the start time of the power assist time zone is “0”, and the power sale amount at the end time is “target power sale amount”. The straight line connecting the two points is set as a target value for gradually increasing electric power sales at each time in the power assist time zone.

  The setting unit 271 calculates the difference between the used power measured by the power measuring unit 52 and the generated power of the solar battery panel 41 using the target power sale amount characteristic continuously or at predetermined time intervals in the power assist time period. The value obtained by subtracting this difference from the gradually increasing power sales target value on the target power sales characteristics is set as the discharge amount. In other words, the setting unit 271 continuously or gradually increases power sales target value-{(power generation power of the solar cell panel 41 at actual time)-(power used at actual time) in the power assist time period. )}] Is set as the discharge amount of the power storage device 3.

  In the energy management system 1 of the present embodiment described above, by setting the discharge amount of the power storage device 3 so as to gradually increase the amount of power sold, the power saving situation of the non-HEMS house (the situation where power is saved at the beginning of the tight time zone) ) Can be realized.

  Note that, as a modification of the present embodiment, the amount of power sold may be gradually reduced. In the case of this modification, the setting unit 271 uses, as the target power sale amount characteristic, a characteristic that gradually decreases at a constant rate with the power sale amount at the start of the power assist time period being the maximum value and the power sale amount at the end being the minimum value. Since the discharge amount of the power storage device 3 in the power assist time zone is the same as in the fourth embodiment, the power sale amount at the start time of the power assist time zone is “twice the target power sale amount” and the power sale amount at the end time is “0” is set, and a straight line connecting the two points is set as a target for gradually decreasing power sales at each time in the power assist time zone. In such an energy management system 1 of this modification, by setting the amount of discharge of the power storage device 3 so that the amount of power sold gradually decreases, the power saving situation of non-HEMS houses (many people have missed the electric forecast, Power sale control corresponding to the situation where power is saved in the second half of the time zone can be realized.

  Further, the energy management device 2 may store the target power sale amount characteristic in advance in the controller-side storage unit 25 instead of obtaining the target power sale amount characteristic.

(Embodiment 7)
The energy management system 1 according to the seventh embodiment is different from the energy management system 1 according to the second embodiment in that the discharge of the storage battery 31 is limited to a time period including a time when the generated power of the solar battery panel 41 is maximum. . In addition, about the component similar to the energy management system 1 of Embodiment 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As illustrated in FIG. 16, the setting unit 271 of the present embodiment includes a peak time period T1 (= t25-t23) is set. As an example, the setting unit 271 predicts a power generation peak time t24 from past generated power, and sets, for example, plus or minus 30 minutes as the peak time zone T1 around the power generation peak time t24.

  FIG. 16 shows the power used ((b) of FIG. 16) and the generated power of the solar cell panel 41 ((c) of FIG. 16) between the start time t21 and the end time t22 of the power assist time zone. The relationship with the discharge amount ((d) of FIG. 16) of the electrical storage apparatus 3 is shown.

  In the peak time zone (discharge control time zone) T <b> 1 set by the setting unit 271, the control unit 272 according to the present embodiment reduces the output power of the power storage device 3 from the amount of discharge set by the setting unit 271. The power storage device 3 is controlled. FIG. 17 shows a case where the discharge amount of the power storage device 3 in the peak time period T1 is zero.

  In the energy management system 1 of the present embodiment described above, by limiting the discharge amount of the power storage device 3 to the peak time period T1, the power sale status of the non-HEMS house (in the time period when the generated power of the solar cell panel 41 is large). It is possible to realize power sale control corresponding to a situation where the amount of power sale increases rapidly.

  In addition, the installation place of the energy management system 1 of each embodiment is not limited to a dwelling unit, A shop etc. may be sufficient.

DESCRIPTION OF SYMBOLS 1 Energy management system 2 Energy management apparatus 271 Setting part 272 Control part 273 Forecast acquisition part 274 Information acquisition part 3 Power storage device 31 Storage battery 41 Solar cell panel

Claims (9)

An energy management device used in a system for supplying power to a load using a power storage device including a storage battery and a commercial power system,
Setting a power assist time zone for discharging the storage battery, and setting a magnitude of the output power of the power storage device in the power assist time zone as a discharge amount,
A control unit for controlling the power storage device so that the storage battery is discharged during the power assist time period and the output power becomes the discharge amount;
A forecast acquisition unit for acquiring an electrical forecast representing a result predicted for each predetermined timing for commercial power and demand power of the commercial power system;
The setting unit, the said acquired by the forecast acquisition unit using electrical forecasts set the band the power assist time, in the power assist hours, before such purchased electricity amount purchased electricity from the power company is constant An energy management device that sets the amount of discharge. An energy management device used in a system for supplying power to a load using a power storage device including a storage battery and a commercial power system,
Setting a power assist time zone for discharging the storage battery, and setting a magnitude of the output power of the power storage device in the power assist time zone as a discharge amount,
A control unit for controlling the power storage device so that the storage battery is discharged during the power assist time period and the output power becomes the discharge amount;
A forecast acquisition unit for acquiring an electrical forecast representing a result predicted for each predetermined timing for commercial power and demand power of the commercial power system;
The setting unit is configured to set the obtained by the forecast acquisition unit using electrical forecast period the power assist time, the the power assist hours, before such amount of power sold to sell electricity to the power company is constant An energy management device that sets the amount of discharge. An energy management device used in a system for supplying power to a load using a power storage device including a storage battery and a commercial power system,
Setting a power assist time zone for discharging the storage battery, and setting a magnitude of the output power of the power storage device in the power assist time zone as a discharge amount,
A control unit for controlling the power storage device so that the storage battery is discharged during the power assist time period and the output power becomes the discharge amount;
A forecast acquisition unit for acquiring an electrical forecast representing a result predicted for each predetermined timing for commercial power and demand power of the commercial power system;
The setting unit sets the power assist time zone using the electric forecast acquired by the forecast acquisition unit, and the power purchase amount purchased from the power company gradually increases or decreases in the power assist time zone. energy management apparatus characterized by setting the pre-Symbol discharge amount. An energy management device used in a system for supplying power to a load using a power storage device including a storage battery and a commercial power system,
Setting a power assist time zone for discharging the storage battery, and setting a magnitude of the output power of the power storage device in the power assist time zone as a discharge amount,
A control unit for controlling the power storage device so that the storage battery is discharged during the power assist time period and the output power becomes the discharge amount;
A forecast acquisition unit for acquiring an electrical forecast representing a result predicted for each predetermined timing for commercial power and demand power of the commercial power system;
The setting unit sets the power assist time zone using the electricity forecast acquired by the forecast acquisition unit, and the amount of power sold to the power company gradually increases or decreases in the power assist time zone. energy management apparatus characterized by setting the pre-Symbol discharge amount. The energy management device according to any one of claims 1 to 4,
An energy management system comprising: a power storage device including a storage battery. In order to control the discharge of the storage battery used in a system for supplying power to a load using a power storage device including a storage battery and a commercial power system, a computer,
A setting unit that sets a power assist time period for discharging the storage battery, and sets a magnitude of output power of the power storage device in the power assist time period as a discharge amount,
A control unit that controls the power storage device so that the storage battery is discharged during the power assist time period and the output power becomes the amount of discharge; and commercial power and demand power of the commercial power system are predicted at predetermined timings. Function as a forecast acquisition unit that acquires an electrical forecast representing the results from the outside,
The computer, as the setting unit, causes the electric power assist time zone to be set using the electric forecast acquired by the forecast acquisition unit, and the amount of electric power purchased from an electric power company is constant in the electric power assist time zone. so as programmed for setting the pre-Symbol discharge amount. In order to control the discharge of the storage battery used in a system for supplying power to a load using a power storage device including a storage battery and a commercial power system, a computer,
A setting unit that sets a power assist time period for discharging the storage battery, and sets a magnitude of output power of the power storage device in the power assist time period as a discharge amount,
A control unit that controls the power storage device so that the storage battery is discharged during the power assist time period and the output power becomes the amount of discharge; and commercial power and demand power of the commercial power system are predicted at predetermined timings. Function as a forecast acquisition unit that acquires an electrical forecast representing the results from the outside,
The computer is set as the setting unit, the power assist time zone is set using the electrical forecast acquired by the forecast acquisition unit, and the amount of power sold to the power company is constant in the power assist time zone. so as programmed for setting the pre-Symbol discharge amount. In order to control the discharge of the storage battery used in a system for supplying power to a load using a power storage device including a storage battery and a commercial power system, a computer,
A setting unit that sets a power assist time period for discharging the storage battery, and sets a magnitude of output power of the power storage device in the power assist time period as a discharge amount,
A control unit that controls the power storage device so that the storage battery is discharged during the power assist time period and the output power becomes the amount of discharge; and commercial power and demand power of the commercial power system are predicted at predetermined timings. Function as a forecast acquisition unit that acquires an electrical forecast representing the results from the outside,
The computer is used as the setting unit to set the power assist time zone using the electric forecast acquired by the forecast acquisition unit, and in the power assist time zone, the amount of power purchased from an electric power company gradually increases or program for setting the pre-Symbol discharge amount so that the gradual decrease. In order to control the discharge of the storage battery used in a system for supplying power to a load using a power storage device including a storage battery and a commercial power system, a computer,
A setting unit that sets a power assist time period for discharging the storage battery, and sets a magnitude of output power of the power storage device in the power assist time period as a discharge amount,
A control unit that controls the power storage device so that the storage battery is discharged during the power assist time period and the output power becomes the amount of discharge; and commercial power and demand power of the commercial power system are predicted at predetermined timings. Function as a forecast acquisition unit that acquires an electrical forecast representing the results from the outside,
With the computer as the setting unit, the power assist time zone is set using the electric forecast acquired by the forecast acquisition unit, and in the power assist time zone, the amount of power sold to the power company gradually increases or program for setting the pre-Symbol discharge amount so that the gradual decrease.

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