JP3172855U - Power supply device and power supply system using the same - Google Patents

Abstract

A power supply system capable of further reducing an electricity bill in a time zone in which electric power of a normal price is supplied from a commercial power source and generated by a solar power generation device.
In connection with the commercial power supply 4 side and the load 3 side, the electric power from the commercial power supply 4 is stored at night, and the stored power is discharged and supplied to the load 3 side at daytime. The power supply device is configured to sell the power generated by the device 1 or the wind power generation device to the commercial power supply 4 side, and includes the solar power generation device 1 and the power supply control device 2, and the power supply control device 2 is In the time zone in which normal-price power is supplied from the commercial power source 4, all the generated power is sold to the commercial power source side, and the power supply to the load side is all purchased from the storage battery 22 without purchasing power from the commercial power source. The discharge power is used.
[Selection] Figure 1

Description

  The present invention relates to a power supply apparatus and a power supply system using the same. More specifically, it is linked with the commercial power supply side and the load side, stores the power from the commercial power supply at night, discharges it during the daytime, uses it on the load side, and uses the power generated by the photovoltaic power generator during the daytime as the commercial power supply. Power supply device that sells power to the power source and a power supply system that uses the power supply device, and in the situation where the solar power generator generates enough power in the daytime, all power supply to the load side will be covered by the discharge power of the storage battery In addition, it is related to the one that does not purchase power from a commercial power source and can further reduce the electricity bill.

  The power generation facilities of electric power companies are prepared to handle the maximum power consumption during summer daytime. For this reason, surplus power that cannot be consumed is generated at night. This surplus power is eventually discarded as heat and disappears. In order to reduce this surplus power, electric power companies have taken measures such as setting nighttime electricity prices at low prices to promote their use, stopping some of the power generation facilities, and reducing output. Yes.

  However, the latter measure results in a low efficiency operation of the generator, resulting in a significant energy loss. In particular, in the operation of nuclear power generation facilities, the output is not changed from the viewpoint of safety, and the same output operation as in the daytime is performed at night. For this reason, even if adjustments as described above are made, a large amount of surplus power still occurs at night, and a great deal of energy is lost in vain.

  In order to improve this situation, renewable energy system power such as photovoltaic power generation devices with large fluctuation factors were linked to stable power such as midnight power, and surplus power was used effectively to save energy. A power supply system has already been proposed. As an example of such a system, there is a “housing power supply system” disclosed in Patent Document 1 proposed by the inventor of the present application.

JP2011-50131A

However, the conventional residential power supply system has the following problems.
In other words, the conventional residential power supply system is supplied with expensive normal price power from a commercial power source in the daytime, and the generated power is supplied to the commercial power source during a time period in which power is generated by a solar power generator or the like. While selling power, the discharge power of the storage battery is supplied to the load side. However, the power supply to the load side is not all covered by the discharged power of the storage battery, but a part of the specification is purchased from a commercial power source. For this reason, a considerable amount of high daytime electricity is purchased, so there is room for improvement from the viewpoint of reducing electricity charges.

(Purpose of the invention)
The present invention is linked with the commercial power supply side and the load side, stores electric power from the commercial power supply at night, discharges it during the daytime and uses it on the load side, and converts the electric power generated by the solar power generator into the commercial power source side during the daytime. In the power supply device that sells electricity to the power supply system and the power supply system that uses the power supply system, all the generated power is commercial power supply during the time period when expensive normal price power is supplied from the commercial power supply and is generated by a solar power generation device, etc. When supplying the storage battery discharge power to the load side, supply all the power to the load side by supplying the discharge power of the storage battery. It is an object of the present invention to provide a power supply device that can reduce electricity charges without power purchase and a power supply system using the power supply device.

(1) The present invention
Linked with the commercial power supply side and the load side, the power from the commercial power supply is stored at night, the stored power is discharged and supplied to the load during the daytime, and the solar power generator or wind power generator generates power during the daytime. A power supply device that sells electric power to the commercial power supply side,
A solar power generator,
A power supply control device linked to the solar power generation device;
With
The solar power generator is
A solar cell module comprising the required number of systems;
A solar power generation system connection unit for adjusting the DC power generated by the solar cell module to a voltage within a certain range;
A power conditioner that converts DC power generated by the solar cell module into AC power;
Have
The power supply control device includes:
A storage battery for storing power from a commercial power source;
A DC / AC inverter that converts the DC power discharged from the storage battery into AC power;
A control unit for controlling the switching of the current path of the wiring path by the installed program software, the output control of the DC / AC inverter or the charge characteristics and discharge amount of the storage battery;
Have
The storage battery module has a capacity at least equivalent to a general demand power amount used on the load side in a time zone in which normal-price power is supplied from a commercial power source.
It is a power supply device.

(2) The present invention
Linked with the commercial power supply side and the load side, the power from the commercial power supply is stored at night, the stored power is discharged and supplied to the load during the daytime, and the solar power generator or wind power generator generates power during the daytime. A power supply device that sells electric power to the commercial power supply side,
A solar power generator,
A power supply control device linked to the solar power generation device;
With
The solar power generator is
A solar cell module comprising the required number of systems;
A solar power generation system connection unit for adjusting the DC power generated by the solar cell module to a voltage within a certain range;
A power conditioner that converts DC power generated by the solar cell module into AC power;
Have
The power supply control device includes:
A storage battery for storing power from a commercial power source;
A DC / AC inverter that converts the DC power discharged from the storage battery into AC power;
A control unit for controlling the switching of the current path of the wiring path by the installed program software, the output control of the DC / AC inverter or the charge characteristics and discharge amount of the storage battery;
Have
The control by the control unit is
During the daytime hours when normal-price power is supplied from the commercial power supply, all the power generated by the photovoltaic power generator is sold to the commercial power supply side, and the power supply to the load side is purchased from the commercial power supply. Including control performed by the discharge power from the storage battery without any electricity,
It is a power supply device.

(3) The present invention
Linked with the commercial power supply side and the load side, the power from the commercial power supply is stored at night, the stored power is discharged and supplied to the load during the daytime, and the solar power generator or wind power generator generates power during the daytime. A power supply device that sells electric power to the commercial power supply side,
A solar power generator,
A power supply control device linked to the solar power generation device;
With
The solar power generator is
A solar cell module comprising the required number of systems;
A solar power generation system connection unit for adjusting the DC power generated by the solar cell module to a voltage within a certain range;
A power conditioner that converts DC power generated by the solar cell module into AC power;
Have
The power supply control device includes:
A storage battery for storing power from a commercial power source;
A DC / AC inverter that converts the DC power discharged from the storage battery into AC power;
A control unit for controlling the switching of the current path of the wiring path by the installed program software, the output control of the DC / AC inverter or the charge characteristics and discharge amount of the storage battery;
Have
The control by the control unit is
<A mode. Normal time, midnight>
In the time zone in which the solar power generation device or the wind power generation device is not generating power and inexpensive power is supplied from the commercial power source, AC power purchased from the commercial power source side is supplied to the load side, and the AC A first operation mode for performing control for converting electric power into direct-current power and charging the storage battery;
<B. Mode normal, morning>
The solar power generation device or the wind power generation device generates power, and supplies AC power purchased from the commercial power source side to the load side in a time zone when somewhat inexpensive power is supplied from the commercial power source. A second operation mode in which control is performed to sell the entire amount of power generated by the photovoltaic power generation device or wind power generation device to the commercial power source side;
<C. Normal mode, noon>
In the time zone in which the solar power generation device or the wind power generation device is generating power and the normal power is supplied from the commercial power supply, only the power discharged from the storage battery is supplied to the load side, and the solar power A third operation mode for performing control to sell the entire amount of power generated by the power generation device or the wind power generation device to the commercial power source side;
<D. Mode normal, evening>
Control is performed to supply AC power purchased from the commercial power supply side to the load side in a time zone in which the solar power generation apparatus or the wind power generation apparatus is not generating power and somewhat inexpensive power is supplied from the commercial power supply. A fourth operation mode;
<E. Mode power outage, morning and afternoon>
When a commercial power supply is interrupted and the solar power generation device or the wind power generation device is generating power, the DC power discharged from the storage battery is converted into AC power and supplied to the load side, and the solar power generation device Or the 5th operation mode which performs control which charges direct-current power inputted from a wind power generator to the storage battery, or supplies the load battery through the storage battery, and
<F. Mode blackout, evening, midnight>
A sixth operation for performing control to convert the DC power discharged from the storage battery into AC power and supply it to the load side when the commercial power supply fails and the solar power generator or the wind power generator is not generating power Mode,
Including,
It is a power supply device.

(4) The present invention
The storage battery has a capacity at least equivalent to a general demand power amount used on the load side in a time zone in which normal power is supplied from a commercial power source.
The power supply device according to (2) or (3).

(5) The present invention
The power supply device according to any one of (1), (2), (3), and (4) is disposed in cooperation between a commercial power supply side and a load side.
It is a power supply system.

  The solar power generation apparatus or the wind power generation apparatus can be combined with or replaced with other renewable energy power generation apparatuses.

  Each electric power company in Japan can make a contract with a charge system tailored to the application. For example, (1) 23:00 to 7:00 (midnight), (2) 7:00 to 10:00 (morning), and 18:00 to 23:00 ( (Evening time zone), (3) 10:00 to 18:00 (daytime time zone), and the present invention has a function that enables control settings that match the control time according to such a contract system time zone. It is what you have.

  The time zone from 23:00 to 7:00 (midnight), which is the fee system, corresponds to the time zone in which “inexpensive power” is supplied from the commercial power source in the scope of claims for utility model registration and the description of this specification, and 7 The hours from 0:00 to 10:00 (morning) and from 18:00 to 23:00 (evening) correspond to the time when “slightly cheap electricity” is supplied from the commercial power supply, and from 10:00 to 18:00 The (daytime) time zone also corresponds to a time zone in which “regular price power” is supplied from a commercial power source.

  The difference in electricity charges in each time zone is 7: If the charge in the time zone from 10:00 to 18:00 (daytime) (the time period when the electricity rate is normal) is 100, 09.3: 00 (morning) and 18: 00-23: 00 (night) time zone (time period where electricity charges are slightly less expensive) 69.3, late night time period (hours where electricity rates are cheaper) Obi) charge is 27.5.

(Function)
The operation of the power supply device and power supply system according to the present invention will be described.
The power supply device and the power supply system are supplied with high-priced normal-price power from a commercial power source, and all the generated power is supplied to the commercial power source during the time period when the solar power generator or wind power generator is generating power. Sell power to the side. In addition, DC power stored in the storage battery is converted into AC power and supplied to the load side. When supplying this discharge power to the load side, expensive power is purchased from a commercial power source as in the past. The power supply to the load side is all performed by supplying the discharge power of the storage battery. Therefore, the electricity bill can be further reduced.

  The power supply device and the power supply system including the power supply device according to the first aspect of the present invention have a general demand that is used on the load side in a time zone in which a storage battery is supplied with normal-price power from a commercial power source. By having a capacity at least equal to the amount of electric power, it is possible to perform control in which all of the power supplied to the load side is supplied by supplying the discharge power of the storage battery.

  The present invention is linked with the commercial power supply side and the load side, stores electric power from the commercial power supply at night, discharges it during the daytime and uses it on the load side, and converts the electric power generated by the solar power generator into the commercial power source side during the daytime. In the power supply system that sells power to and the power supply system that uses the power supply system, all the generated power is supplied to the commercial power supply during the time period when expensive regular priced power is supplied from the commercial power When power is supplied to the load side and the discharge power of the storage battery is supplied to the load side, the power supply to the load side is all performed by supplying the discharge power of the storage battery, and expensive power is purchased from the commercial power supply. Therefore, it is possible to provide a power supply apparatus and a power supply system using the power supply apparatus that can further reduce the electricity bill.

The block diagram which shows one Embodiment of the electric power supply system which concerns on this invention. The block diagram of the electric power supply control apparatus which comprises an electric power supply system. The block diagram explaining the operation control of A mode (23: 00-7: 00 time zone) at the normal time. The block diagram explaining the operation control of B mode (time zone of 7: 00-10: 00) at normal time. The block diagram explaining the operation control of C mode (10: 00-18: 00 time zone) at the normal time. The block diagram explaining the driving | operation control of normal time D mode (18: 00-23: 00 time slot | zone). The block diagram explaining the operation control of E mode (time zone of 7: 00-18: 00) at the time of a power failure. The block diagram explaining the operation control of F mode (18: 00-7: 00 time zone) at the time of a power failure.

Embodiment
The present invention will be described in detail based on the embodiments shown in the drawings.
Please refer to FIG. 1 and FIG.
The power supply system S is a residential system, and includes a power supply device D, a commercial power source 4 and a load-side switchboard 3 linked to the power supply device D.
The power supply device D includes a power supply control device 2 that includes the solar power generation device 1 and the storage battery module 22.

The solar power generation device 1 includes solar cell modules 10 a, 10 b, 10 c, and 10 d that are composed of four systems, a solar power generation system connection unit 11, and a power conditioner 12.
The solar cell modules 10 a, 10 b, 10 c, and 10 d are connected to the power conditioner 12 via the solar power generation system connection unit 11.

  The solar cell modules 10a, 10b, 10c, and 10d convert solar light (light energy) into electric power by the photovoltaic effect, and are panels that generate a required electric power by connecting a large number of cells in series or in parallel. is there.

  The solar power generation system connection part 11 adjusts the DC power of the unequal voltage generated by the solar cell modules 10a, 10b, 10c, and 10d to a voltage within a required range. In addition, about the solar power generation system connection part 11, since it is already marketed and the technical content is well-known, detailed description is abbreviate | omitted.

  The power conditioner 12 converts DC power generated by the solar cell modules 10a, 10b, 10c, and 10d into AC power and outputs the AC power, and includes an AC two-wire 200V output unit 120 and an AC single-wire 100V output unit 121. ing. However, the current varies depending on the amount of power generated.

  The AC single line 100V output unit 121 of the power conditioner 12 is connected to the AC input unit 204 of the power supply control device 2 described later by a wiring 123, whereby the photovoltaic power generation device 1 is linked to the power supply device D. Further, the AC two-wire 200V output unit 120 is connected by a wiring 122 to a path downstream of the circuit breaker 42 described later between a wiring path W10 between the commercial power supply 4 and the AC input unit 204 described later.

  Note that a wiring 124 is provided by branching from a wiring 123 extending from the single-wire 100V output section 121 to the AC input section 204, and the tip thereof is connected to the power generation operation dedicated outlet 13. The power generation operation dedicated outlet 13 is provided only at one location such as indoors on the user side. Only when the power generation operation (automatic power generation) of the photovoltaic power generation apparatus 1 is performed at the time of a power failure of the commercial power supply 4, the power generation operation outlet 13 is supplied with AC 100 V power.

The power supply control device 2 will be described mainly with reference to FIG.
The power supply control device 2 includes a control box 2a, a storage battery box 2b, and a connection box 2c. The control box 2a, the storage battery box 2b, and the connection box 2c are connected by a wiring connection portion (reference numeral omitted).

  The connection box 2c includes an AC input unit 204 that inputs power generated by the photovoltaic power generation apparatus 1, an AC input / output unit 207 that inputs power of an AC100V anode two-wire supplied from the commercial power supply 4, and the load An AC output unit 205 that outputs AC 100V AC power to the side switchboard 3 and an AC output unit 206 that outputs AC 200V AC power to the load side are provided.

  The storage battery box 2 b includes a storage battery module 22. Each of the storage battery modules 22 includes a large number of battery cells (reference numerals omitted). As a battery cell to be used, for example, a lithium polymer battery can be mentioned. However, other types of storage batteries known in the art can be appropriately employed as long as the battery capacity required for the system can be accommodated.

  A wiring path W <b> 1 is provided between the storage battery module 22 and the AC input unit 204. In the route of the wiring route W1, an open / close switch S1 and an AC single-phase three-wire 200V booster 21 are connected in order from the side closer to the AC input unit 204.

  The storage battery module 22, as will be described later, is a charger (including a AC / DC converter (converter)) that converts AC 100 V power into DC power having a specified voltage for charging when charging power from the commercial power source 4. (Not shown).

  The control box 2a includes a DC / AC inverter 23 that converts DC power discharged from the storage battery module 22 into AC power. A wiring path W <b> 2 is provided between the storage battery module 22 and the DC / AC inverter 23. A battery discharge power sensor 201 and an open / close switch S2 are connected in this order from the side closer to the storage battery module 22 in the wiring path W2.

  A wiring path W3 is provided between the DC / AC inverter 23 and the AC output unit 205 of the connection box 2c. An AC single-phase three-wire anode two-wire output balance sensor 202 is connected in the wiring route W3.

  The battery discharge power sensor 201 detects power discharged from the storage battery module 22 and transmits the information to the control unit 25. The anode two-wire output balance sensor 202 reads the output balance of the anode two wires of the DC / AC inverter 23 under the control of the control unit 25, and equalizes (reads) this.

  A wiring path W4 is provided between a path downstream of the anode two-wire output balance sensor 202 in the wiring path W3 and the AC output unit 206. An open / close switch S6 is connected in the route of the wiring route W4.

  A wiring path W <b> 5 is provided between the AC input / output unit 207 of the connection box 2 c and the storage battery module 22. An open / close switch S3 is connected in the route of the wiring route W5. In addition, conversion from the alternating current power at the time of charging the storage battery module 22 to direct current power is performed by the charger with which the storage battery module 22 is provided as mentioned above.

  Between the path between the AC input / output unit 207 and the opening / closing switch S3 of the wiring path W5 and the path upstream of the anode two-wire output balance sensor 202 of the wiring path W3, the wiring path W6 and the wiring path W7 are in parallel. It is connected.

  An open / close switch S4 is connected in the route of the wiring route W6. The wiring path W7 is a maintenance wiring path, and a maintenance opening / closing switch S5 for manually performing an opening / closing operation is connected to the wiring path W7.

Power is sold to the electric power company by outputting AC power from the AC two-wire 200V output unit 120 of the power conditioner 12 and flowing it back to the commercial power source 4 side.
In addition, “reverse power flow” as used in this specification refers to a power company line in a grid connection that connects power generated by a renewable energy power generation device such as solar power generation or wind power generation with power received from a power company. It is sent to the (commercial power) side.

  As shown in FIGS. 1 and 2, the storage battery module 22 includes a cooling fan 26 and a heat retaining heater 27 for managing the temperature of the storage battery module 22. The cooling fan 26 and the heat retaining heater 27 are connected to the storage battery module 22 through a wiring path W9. In the wiring path W <b> 9, an opening / closing switch S <b> 8 is provided in a path that is branched from each other and connected to the cooling fan 26, and an opening / closing switch S <b> 9 is provided in a path that is connected to the heat retaining heater 27.

  The control box 2 a includes a control unit 25 having an MPU (Micro-Processing Unit) and a DC power module 24 that supplies power to the control unit 25. The DC power module 24 is already on the market and its technical contents are well known, so the description thereof is omitted.

  The control unit 25 has a storage unit (not shown) for installing control program software. For example, the control unit 25 controls the opening / closing operations of the switches S1 to S9, exchanges information with the sensors 201 and 202, outputs control of the DC / AC inverter 23, or program software installed in the storage unit. The charging characteristics and discharge amount of the storage battery module 22 are controlled.

  In addition, for example, by appropriately installing program software in accordance with the specifications and performance of the storage battery to be used in the storage unit of the control unit 25, it is possible to flexibly cope with changes or upgrades of the storage battery after system introduction.

  The DC power module 24 is connected to a path between the battery discharge power sensor 201 and the open / close switch S2 in the wiring path W2 and a path of the wiring path W8 provided between the control unit 25. During operation of the system, the control unit 25 is always supplied with direct-current power from the storage battery module 22 even if the commercial power supply 4 is cut off. I try not to cause any trouble.

  The commercial power supply 4 is connected to the AC input / output unit 207 via the wiring path W10 and linked to the power supply control device 2. In the route of the wiring route W10, there are a breaker 42 for controlling a watt-hour meter 40 for power purchase, a watt-hour meter 41 for power sale, and a customer-side power contract ampere contracted with an electric power company in order from the commercial power source 4 side. It is connected. The load side switchboard 3 is connected to and linked to an AC output unit 205 that outputs the AC 100V.

(Function)
An example of control of the power supply system S will be described in detail for each mode with reference to FIGS. The control for switching the mode by the control unit 25 is made to match the time zone classification of each power company that provides the service of the area where the power supply system S is installed.

  In this embodiment, the service time zone is 23:00 to 7:00 (midnight) in A mode, 7:00 to 10:00 (morning) in B mode, and 10:00 to 18:00 (in C mode). A description will be given by taking as an example a case where it is installed in an area of an electric power company where the D mode is divided between 18:00 and 23:00 (night). The control unit 25 is managed by program software corresponding to this time zone classification.

  The table of contents for each item is shown in order to facilitate understanding of the following description of the operation.

(table of contents)
(1) Normal operation
(1-1) A mode (23:00 to 7:00): <Mode for supplying power from the commercial power source to the load side and charging the storage battery>: Paragraphs [0052] to [0058]
(1-2) B mode (7:00 to 10:00): <Mode for supplying power from the photovoltaic power generation device to the load side and selling power to the commercial power source>: Paragraphs [0059] to [0064]
(1-3) C mode (10:00 to 18:00): <Mode for selling power from the photovoltaic power generator to the commercial power source and supplying power from the storage battery to the load>: Paragraphs [0065] to [0065] 0072]
(1-4) D mode (18:00 to 23:00): <Mode for supplying power from the commercial power source to the load>: Paragraphs [0073] to [0076]
(2) Operation during power failure
(2-1) E mode (7:00 to 18:00): <Mode for supplying power from the storage battery to the load side and charging the storage battery from the solar power generation device>: Paragraphs [0078] to [0088]
(2-2) F mode (18:00 to 7:00): <Mode for supplying power from the storage battery to the load side>: Paragraphs [0089] to [0094]

(1) Normal operation Operation in a state where the commercial power source 4 is normal (in a state where no power failure occurs) and the solar power generation device 1 is operating and generating power during sunshine. The A mode is the first operation mode in the claims of the utility model registration, the B mode is the second operation mode, the C mode is the third operation mode, and the D mode is the fourth operation mode. Constitute.

(1-1)
<A mode: Mode for supplying power from the commercial power source to the load side and charging the storage battery>
(Control at midnight, 23: 00-7: 00)
Refer mainly to FIG.

In this mode, inexpensive power is supplied from the commercial power source 4. This electric power is supplied to the load side on the one hand, and the storage battery module 22 is charged on the other hand. Moreover, since it is a time zone when there is no sunshine, the solar power generation device 1 is not operating, and the reverse power flow to the commercial power source 4 side, that is, the power sale is not performed.
Hereinafter, the control in the A mode will be described in more detail.

  In the A mode, the open / close switches S1 to S6 are opened and closed as shown in FIG. That is, the open / close switch S1 is OFF, the open / close switch S2 is OFF, the open / close switch S3 is ON, the open / close switch S4 is ON, the open / close switch S5 is OFF, and the open / close switch S6 is ON. Note that the open / close switches S8 and S9 are appropriately opened and closed under the control of the control unit 25 in accordance with the state of the storage battery module 22 (the same applies to the following modes).

  In this time zone, inexpensive power is purchased from the commercial power source 4, and AC power is supplied from the AC input / output unit 207 to the power supply control device 2 through the power meter for power purchase 40 in the wiring path W <b> 10. The Since the open / close switch S4 is ON, the power from the commercial power supply 4 is directly supplied to the load side as much as there is demand on the load side. Specifically, AC 100 V is output from the AC output unit 205 to the load-side switchboard 3. Further, since the open / close switch S6 is ON, AC 200 V is output from the AC output unit 206.

  In addition, by inputting to the program software that controls each mode installed in the control unit 25, for example, the maximum for performing charge voltage control in units of minutes in the time zone from 23:00 to 7:00 in the A mode. The charge cell voltage is set. As an example, the standard battery voltage of the storage battery module 22 is 3.7 V, the maximum charge cell voltage is 4.2 V, and the minimum discharge cell voltage (discharge limit) is 3.0 V, which is stored in the control unit 25.

  Further, since the open / close switch S3 in the route of the wiring route W5 is ON, the power from the commercial power source 4 input from the AC input / output unit 207 is changed from AC power to DC power by the battery module 22 with a charger. It is converted and charged. In addition, when charging the storage battery module 22, the charging current is adjusted by controlling the charger by the control unit 25.

  In addition, the amount of charge that can be charged to the storage battery module 22 in this midnight time zone is at least equivalent to the general demand power amount on the load side in the time zone in which normal-price power is supplied from the commercial power source. The reference is set, for example, 6 KW / h, but is not limited to this, and can be set as needed.

(1-2)
<B mode: Mode for supplying power from the photovoltaic power generator to the load side and selling power to the commercial power source>
(Control at 7: 00-10: 00 in the morning hours)
Refer mainly to FIG.

In this mode, slightly inexpensive power is purchased from the commercial power supply 4 and supplied to the load side. In addition, the solar power generation device 1 may operate depending on the weather or not. Regardless of whether the solar power generation device 1 is operating or not operating, the entire amount of the generated power is reversely flowed to the commercial power source 4 and sold.
Hereinafter, the B mode control will be described in more detail.

  In the B mode, the open / close switches S1 to S6 are opened and closed as shown in FIG. That is, the open / close switch S1 is OFF, the open / close switch S2 is OFF, the open / close switch S3 is OFF, the open / close switch S4 is ON, the open / close switch S5 is OFF, and the open / close switch S6 is ON.

  First, the AC power supplied from the commercial power supply 4 passes through the watt-hour meter 40 for power purchase in the wiring path W10, and after being input from the AC input / output unit 207 to the connection box 2c, from the AC output unit 205 to the load side. AC 100 V is output to the load side switchboard 3, and AC 200 V is output from the AC output unit 206.

  Moreover, when the solar power generation device 1 is in operation, power is generated by the solar cell modules 10a, 10b, 10c, and 10d including the four systems of the solar power generation device 1. The voltage is adjusted to a voltage within a required range by the solar power generation system connection unit 11.

  The AC power output from the AC two-wire 200V output unit 120 of the power conditioner 12 is reversely flowed to the commercial power supply 4 through the power sales watt-hour meter 41 in the wiring path W10 to be sold.

(1-3)
<C mode: mode for selling power from the solar power generator to the commercial power source and supplying power from the storage battery to the load>
(Control during daytime, 10: 00-18: 00)
Reference is mainly made to FIG.

In this mode, normal-price power is supplied from the commercial power source 4. The solar power generation device 1 may operate depending on the weather or not.
The supply of power to the load 3 side is performed by the discharge power from the storage battery module 22, and the total amount of power generated by the solar battery modules 10 a, 10 b, 10 c, and 10 d of the solar power generation device 1 flows backward to the commercial power supply 4. And sold.
Hereinafter, the control in this mode will be described in more detail.

  In the C mode, the open / close switches S1 to S6 are opened / closed by a control signal from the control unit 25 as shown in FIG. That is, the open / close switch S1 is OFF, the open / close switch S2 is ON, the open / close switch S3 is OFF, the open / close switch S4 is OFF, the open / close switch S5 is OFF, and the open / close switch S6 is ON.

  First, DC power is discharged from the storage battery module 22. The discharged electric power is sent to the DC / AC inverter 23 through the wiring path W2. The discharged power is detected by the battery discharge power sensor 201.

  Then, DC power is converted into AC power by the DC / AC inverter 23, passes through the wiring path W3, the output balance of the anode two wires of the DC / AC inverter 23 is read by the anode two wire output balance sensor 202, and this information is It is transmitted to the control unit 25. Based on this information, the output balance of the two anode lines of the DC / AC inverter 23 is adjusted to equalize the output of the two anode lines.

AC power with balanced output of the two anodes passes through the wiring path W3 and is supplied with AC100V from the load-side AC output unit 205 to the load-side switchboard 3 and with AC200V from the AC output unit 206.
After that, when the discharge power amount of the storage battery module 22 reaches the minimum cell voltage (discharge limit), the controller 25 turns off the open / close switch S2 to stop the discharge.

On the other hand, during sunshine, power is generated by the solar cell modules 10a, 10b, 10c, and 10d including the four systems of the solar power generation device 1, and DC power of unequal voltage is required by the solar power system connection unit 11 in each system. Adjusted to a voltage within the range.
The AC power output from the AC two-wire 200V output unit 120 of the power conditioner 12 is reversely flowed to the commercial power supply 4 through the power sales watt-hour meter 41 in the wiring path W10 to be sold.

  As described above, in the C mode, all the power supply to the load side is performed by supplying the discharge power of the storage battery, and the expensive power is purchased from the commercial power supply 4 as in the past. There is no supply.

(1-4)
<D mode: Mode for supplying power from the commercial power source to the load>
(Control during evening hours, 18: 00-23: 00)
Reference is mainly made to FIG.

In this mode, slightly inexpensive power is supplied from the commercial power source 4. Moreover, since it is a time zone with little or no sunlight, the solar power generation device 1 is not operating or is not operating so much. Then, AC power is purchased from the commercial power source 4 and supplied to the load 3 side.
Hereinafter, the control in this mode will be described in more detail.

  In the D mode, the open / close switches S1 to S6 are opened / closed by a control signal from the control unit 25 as shown in FIG. That is, the open / close switch S1 is OFF, the open / close switch S2 is OFF, the open / close switch S3 is OFF, the open / close switch S4 is ON, the open / close switch S5 is OFF, and the open / close switch S6 is ON.

  First, the AC power supplied from the commercial power supply 4 is input from the AC input / output unit 207 to the connection box 2c through the power purchase wattmeter 40 and the breaker 42 in the wiring path W10. Then, AC 100 V is output from the AC output unit 205 through the opening / closing switch S4 and the wiring path W3 of the wiring path W6, and supplied to the load-side switchboard 3. In addition, AC 200V is supplied from the AC output unit 206 through the wiring path W4 branched from the wiring path W3.

(2) Operation at the time of a power failure The commercial power source 4 has a power failure, and the operation is performed in a situation where the solar power generation device 1 operates and can generate power during sunshine. The mode E to be described later constitutes the fifth operation mode referred to in the scope of the utility model registration claim, and the mode F similarly constitutes the sixth operation mode.

(2-1)
<E mode: Mode for supplying power from the storage battery to the load side and charging the storage battery from the solar power generation device>
(Control during sunshine hours, 7: 00-18: 00)
Refer mainly to FIG.

  During normal times when there is no power outage during this time, electricity is supplied from the commercial power supply 4 at a slightly lower price (7: 00-10: 00) or normal price (10: 00-18: 00). The operation is performed in the B mode (7:00 to 10:00) or the C mode (10:00 to 18:00).

  When the commercial power source 4 is interrupted during this time, even if the solar power generation device 1 is operating and generating power, the solar power generation device 1 does not directly supply generated power to the commercial power side as surplus power. The photovoltaic device 1 is forcibly stopped once.

  This is because when the operation of the solar power generation device 1 is continued in a situation where the commercial power supply 4 is cut off, for example, when the weather becomes rainy or cloudy, the power generation output decreases and the power supply to the load 3 side is insufficient. In addition, various electrical equipment used on the load 3 side may fail, or data may be damaged on a personal computer, etc., and the consumer side recognizes that power is being supplied and uses the electrical equipment. This is to prevent various inconveniences from occurring.

  When the solar power generation device 1 is capable of power generation and when the customer who installs the system needs it, the self-sustained operation switch (not shown) is manually turned on again. The photovoltaic device 1 can be operated. In addition, when the photovoltaic power generation apparatus 1 operates and the photovoltaic power generation 1 stops for the purpose of avoiding insufficient power generation due to rainy weather or cloudy weather, only supply of the electric power discharged by the storage battery module 22 to the load side is performed. To.

  When the solar power generation device 1 is operated manually, when switching from the B-mode operation to the E-mode operation, the open / close switch S1 is ON, the open / close switch S2 is ON, and open / closed by the control signal from the control unit 25 The switch S4 is switched off. Further, in the case of shifting from the C mode operation to the operation at the time of a power failure, the open / close switch S <b> 1 is turned on by the control signal from the control unit 25.

  That is, as shown in FIG. 7, in this E mode, the open / close switch S1 is ON, the open / close switch S2 is ON, the open / close switch S3 is OFF, the open / close switch S4 is OFF, the open / close switch S5 is OFF, and the open / close switch S6 is ON. Become.

Then, in the case of shifting from the B mode operation to the E mode power failure operation, DC power is discharged from the storage battery module 22 and the discharged power is supplied to the load side.
On the other hand, under the control of the power conditioner 12, the reverse power flow to the commercial power source 4 side of the power generated by the solar cell modules 10a, 10b, 10c, and 10d of the solar power generation device 1 is stopped, and the power generation of the solar power generation device 1 The operation is switched to sending electric power to the storage battery module 22.

  That is, the AC power output from the AC single line 100V output unit 121 of the power conditioner 12 enters the control box 2a from the AC input unit 204 and passes through the open / close switch S1 of the wiring path W1 and the AC single-phase three-wire 200V booster 21. To the storage battery module 22. In addition, since the charger of the storage battery module 22 is 200V single-phase three-wire, the power sent to the storage battery module 22 needs to boost the power generation self-sustained operation output 100V single-phase two-wire to 200V, and the AC single-phase three-wire 200V booster. 21 boosts the voltage to 200V.

  Thereby, when the storage battery module 22 is fully charged, the generated power of the solar power generation device 1 is exchanged into direct current by the charger of the storage battery module 22, and flows to the storage battery module 22 and the DC / AC inverter 23. 22 is supplied to the load 3 side together with the discharge power from 22. When the storage battery module 22 is not fully charged, the power boosted to 200 V by the AC single-phase three-wire 200 V booster 21 as described above is charged in parallel with the discharge.

Further, in the case of shifting from the C mode operation to the E mode power failure operation, the supply of the electric power discharged by the storage battery module 22 to the load side is continued as it is.
And by control of the power conditioner 12, the reverse power flow to the commercial power source 4 side of the electric power generated by the solar cell modules 10a, 10b, 10c, and 10d of the solar power generation device 1 is stopped, and the power generation of the solar power generation device 1 It switches to the driving | operation which sends electric power to the storage battery module 22, and is controlled similarly to the case where it transfers to the operation at the time of a power failure of the said B mode operation.

(2-2)
<F mode: Mode for supplying power from the storage battery to the load>
(Control at 18:00 to 7:00 when there is no sunshine)
Reference is mainly made to FIG.

  During this time period, in the normal time when there is no power outage, the commercial power supply 4 supplies slightly cheaper electricity (18: 00-23: 00) or cheaper electricity (23: 00-7: 00). Driving in the D mode (18:00 to 23:00) or A mode (23:00 to 7:00).

  When the commercial power supply 4 fails during operation in the D mode or A mode, the open / close switch S2 is turned on / off by the control signal from the control unit 25 when the D mode operation is shifted to the F mode power failure operation. The switch S4 is turned off and the open / close switch S6 is turned off.

  In addition, in the case of shifting from the A mode operation to the F mode power failure operation, the open / close switch S2 is turned on, the open / close switch S3 is turned off, the open / close switch S4 is turned off, and the open / close switch S6 is turned on by the control signal from the control unit 25. Switch to OFF.

  That is, as shown in FIG. 8, in this F mode, the opening / closing switch S1 is OFF, the opening / closing switch S2 is ON, the opening / closing switch S3 is OFF, the opening / closing switch S4 is OFF, the opening / closing switch S5 is OFF, and the opening / closing switch S6 is OFF. Become.

  In both cases of shifting from D-mode operation to F-mode power failure operation and A-mode operation to F-mode power failure operation, the same as described in the C mode. It switches to the operation | movement which supplies the electric power discharged with the storage battery module 22 to the load side.

  The terms and expressions used in this specification are merely explanatory and are not limiting at all, and exclude terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to do. Needless to say, various modifications are possible within the scope of the technical idea of the present invention.

DESCRIPTION OF SYMBOLS S Power supply system D Power supply apparatus 1 Solar power generation device 10a, 10b, 10c, 10d Solar cell module 11 Solar power generation system connection part 12 Power conditioner 120 AC two line 200V output part 121 AC single line 100V output part 122, 123 , 124 Wiring 13 Dedicated power generation operation outlet 2 Power supply controller 2a Control box 2b Storage battery box 2c Connection box 21 AC single-phase three-wire 200V booster 22 First storage battery module 23 DC / AC inverter 24 DC power module 25 Control unit 26 Cooling fan 27 Insulation heater 201 Battery discharge power sensor 202 Anode two-wire output balance sensor 204 AC input unit 205 AC output unit 206 AC output unit 207 AC input / output unit 3 Load side switchboard 4 Commercial power supply 40 For purchase of electricity Force meter 41 power sale power meter 42 breakers S1 to S6, S8, S9 off switch W1~W10 wiring path

Claims (5)

Linked with the commercial power supply (4) side and the load (3) side, the power from the commercial power supply (4) is stored at night, and the stored power is discharged and supplied to the load (3) side during the daytime. A power supply device for selling the power generated by the solar power generation device (1) or the wind power generation device to the commercial power source (4) side,
A solar power generation device (1),
A power supply control device (2) linked to the solar power generation device (1);
With
The solar power generation device (1)
Solar cell modules (10a, 10b, 10c, 10d) consisting of the required number of systems,
A solar power generation system connection part (11) for adjusting the DC power generated by the solar cell module (10a, 10b, 10c, 10d) to a voltage within a certain range;
A power conditioner (12) for converting DC power generated by the solar cell module (10a, 10b, 10c, 10d) into AC power;
Have
The power supply control device (2)
A storage battery (22) for storing electric power from a commercial power supply (4);
A DC / AC inverter (23) for converting DC power discharged from the storage battery (22) into AC power;
With the installed program software, a control unit (25) for controlling the switching of the energization path of the wiring path, the output control of the DC / AC inverter (23) or the charge characteristics and discharge amount of the storage battery (22),
Have
The storage battery module (22) has a capacity at least equivalent to a general demand power amount used on the load side in a time zone in which normal-price power is supplied from a commercial power source.
Power supply device. Linked with the commercial power supply (4) side and the load (3) side, the power from the commercial power supply (4) is stored at night, and the stored power is discharged and supplied to the load (3) side during the daytime. A power supply device for selling the power generated by the solar power generation device (1) or the wind power generation device to the commercial power source (4) side,
A solar power generation device (1),
A power supply control device (2) linked to the solar power generation device (1);
With
The solar power generation device (1)
Solar cell modules (10a, 10b, 10c, 10d) consisting of the required number of systems,
A solar power generation system connection part (11) for adjusting the DC power generated by the solar cell module (10a, 10b, 10c, 10d) to a voltage within a certain range;
A power conditioner (12) for converting DC power generated by the solar cell module (10a, 10b, 10c, 10d) into AC power;
Have
The power supply control device (2)
A storage battery (22) for storing electric power from a commercial power supply (4);
A DC / AC inverter (23) for converting DC power discharged from the storage battery (22) into AC power;
With the installed program software, a control unit (25) for controlling the switching of the energization path of the wiring path, the output control of the DC / AC inverter (23) or the charge characteristics and discharge amount of the storage battery (22),
Have
Control by the control unit (25),
In the daytime hours when normal-price power is supplied from the commercial power source (4), all the power generated by the solar power generation device (1) is sold to the commercial power source (4) side, and the load (3 The power supply to the) side includes control performed by the discharge power from the storage battery (22) without buying power from the commercial power supply (4),
Power supply device. Linked with the commercial power supply (4) side and the load (3) side, the power from the commercial power supply (4) is stored at night, and the stored power is discharged and supplied to the load (3) side during the daytime. A power supply device for selling the power generated by the solar power generation device (1) or the wind power generation device to the commercial power source (4) side,
A solar power generation device (1),
A power supply control device (2) linked to the solar power generation device (1);
With
The solar power generation device (1)
Solar cell modules (10a, 10b, 10c, 10d) consisting of the required number of systems,
A solar power generation system connection part (11) for adjusting the DC power generated by the solar cell module (10a, 10b, 10c, 10d) to a voltage within a certain range;
A power conditioner (12) for converting DC power generated by the solar cell module (10a, 10b, 10c, 10d) into AC power;
Have
The power supply control device (2)
A storage battery (22) for storing electric power from a commercial power supply (4);
A DC / AC inverter (23) for converting DC power discharged from the storage battery (22) into AC power;
With the installed program software, a control unit (25) for controlling the switching of the energization path of the wiring path, the output control of the DC / AC inverter (23) or the charge characteristics and discharge amount of the storage battery (22),
Have
Control by the control unit (25),
The AC power purchased from the commercial power source (4) side is not generated by the solar power generation device (1) or the wind power generation device and is supplied with inexpensive power from the commercial power source (4). A first operation mode for controlling the charging of the storage battery (22) by supplying the load (3) side and converting the AC power into DC power;
The solar power generation device (1) or the wind power generation device is generating electric power, and the AC power purchased from the commercial power source (4) side is used in the time zone in which somewhat inexpensive power is supplied from the commercial power source (4). A second operation mode for controlling the supply of the entire amount of the electric power generated by the solar power generation device (1) or the wind power generation device to the commercial power source (4) side while supplying the load (3) side;
The solar power generation device (1) or the wind power generation device is generating power, and the load (3) is discharged from the storage battery (22) to the load (3) side during the normal power supply from the commercial power source (4). A third operation mode for performing control to supply only the generated power and sell the entire amount of power generated by the solar power generation device (1) or the wind power generation device to the commercial power source (4);
AC power purchased from the commercial power supply (4) side during a time period when the solar power generation apparatus (1) or the wind power generation apparatus is not generating power and is supplied with slightly cheaper power from the commercial power supply (4) A fourth operation mode in which control is performed to supply power to the load (3) side,
When the commercial power source (4) is out of power and the solar power generation device (1) or the wind power generation device is generating power, the DC power discharged from the storage battery (22) is converted into AC power to load (3 ) Side, and the storage battery (22) is charged with DC power input from the solar power generation device (1) or the wind power generation device, or passes through the storage battery (22) to the load (3) side. A fifth operation mode for performing supply control;
When the commercial power source (4) fails and the solar power generation device (1) or the wind power generation device is not generating power, the DC power discharged from the storage battery (22) is converted into AC power to load (3 A sixth operation mode for performing control to be supplied to the) side;
Including,
Power supply device. The storage battery (22) has a capacity at least equivalent to the general demand power used on the load (3) side in a time zone in which normal-price power is supplied from the commercial power supply (4).
The power supply device according to claim 2 or 3. Between the commercial power supply (4) side and the load (3) side, the power supply device according to any one of claims 1, 2, 3, or 4 is arranged in cooperation.
Power supply system.

Images