JP2015087240A - Power measurement system, power measurement method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power measurement system, etc., capable of calculating the consumed amount of power of a load or the supplied amount of power of a power supply system with high accuracy.SOLUTION: A power measurement system 100 includes: a data collection unit 123 for successively acquiring, from a measurement unit, measurement data in which are included a power measurement value derived by measuring the power consumed by a load or the power supplied by a power supply system and a current measurement value and voltage measurement value that are measurement values measured when the power measurement value is measured and derived by measuring the current and voltage inputted/outputted to and from the load and the power supply system; and a processing unit 124 for determining whether the result of comparison between the power measurement value included in the measurement data and an apparent power value calculated on the basis of the current measurement value and voltage measurement value included in the measurement data satisfies a preset standard, and calculating the consumed amount of power of the load or the supplied amount of power of the power supply system on the basis of the measurement data that satisfies the standard without using the measurement data that does not satisfy the preset standard.

Description

  The present invention relates to a power measurement system, a power measurement method, and a program.

  Energy saving is required in houses and office buildings. In order to realize energy saving, it is necessary to accurately grasp the amount of power consumed by a load such as home appliances and the amount of power supplied by a power feeding system such as a solar power generation system. Patent Document 1 discloses a multi-circuit power measurement device that calculates a power amount consumed by a load circuit by integrating a difference value of an integrated power amount transmitted from an individual measurement device for each collection cycle in an integration register. It is disclosed.

JP 2003-222645 A

  Abnormal measurement data may be collected due to a malfunction of the power measurement unit or a communication error between the power measurement unit and the data collection unit. When the electric energy is calculated based on abnormal measurement data, the calculated electric energy is low in accuracy.

  In this regard, the apparatus of Patent Document 1 suppresses a decrease in the calculation accuracy of the electric energy by integrating only the difference values within the normal value range in the integration register. However, when the apparatus of Patent Document 1 is applied to a house, an office building, or the like, since the load measured by the power measurement unit is assumed to be various devices, the range of normal values must be wide to some extent. Then, even if the measurement data is abnormal, there is a high possibility that the difference value falls within the normal value range. As a result, the accuracy of the electric energy calculated by the device of Patent Document 1 is low.

  The present invention has been made in view of such a problem, and an object thereof is to provide a power measurement system, a power measurement method, and a program capable of accurately calculating the power consumption amount of a load or the power supply system. To do.

  The power measurement system of the present invention includes a power measurement value obtained by measuring power consumed by a load or power supplied by a power supply system, and a measurement value measured when the power measurement value is measured. Data collection means for sequentially acquiring measurement data including current measurement values and voltage measurement values obtained by measuring current and voltage input / output to / from the measurement unit, and power measurement included in the measurement data acquired by the data collection means A discriminating means for discriminating whether or not the comparison result of the value and the apparent power value calculated based on the current measurement value and the voltage measurement value included in the measurement data satisfy a preset criterion, and the comparison result Based on the measurement data determined to satisfy the preset criteria, use the measurement data determined that the comparison result does not meet the preset criteria Without Rukoto comprises a calculating means for calculating an amount of power supplied electric energy consumption or power supply system of the load, the.

  According to the present invention, the electric energy is calculated based on the measurement data in which the comparison result between the electric power measurement value and the apparent electric power value calculated based on the electric current measurement value and the voltage measurement value satisfies a preset criterion. Since the calculation is performed, it is possible to accurately calculate the power consumption amount of the load or the power supply amount of the power feeding system.

It is a figure which shows the structure of the electric power measurement system which concerns on embodiment of this invention. It is a block diagram of the electric power measurement system which concerns on embodiment of this invention. It is a figure which shows the classification specific information input from an input part. It is a figure which shows an example of the user interface which inputs classification specific information. It is a figure which shows the normal range data, the range specific data, and integrated electric power data which are stored in a memory | storage part. It is a functional block diagram which shows the function of a process part. It is a flowchart which shows the range specific process which concerns on embodiment of this invention. 3 is a flowchart illustrating power amount calculation processing according to the first embodiment. 10 is a flowchart illustrating power amount calculation processing according to the second embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Embodiment 1)
The power measurement system 100 according to the embodiment of the present invention is a system that measures the amount of power consumed by a load installed in a building and the amount of power supplied by a power feeding system arranged in the building.

  Here, the “load” refers to, for example, an electric device installed in a building or a load on the entire building. The “power supply system” refers to a system that supplies power to, for example, a power distribution system or a system power supply. In the following description, for easy understanding, the loads are the main load 310 (the load of the entire building), the electric device 330, and the electric device 340 shown in FIG. 1, and the power supply system is the power generation device 320 shown in FIG. Suppose that

  As shown in FIG. 1, a distribution board 200 for distributing power supplied from a system power supply is installed in a building to be measured by the power measurement system 100. The distribution board 200 includes a main breaker 210 and branch breakers 221 to 223. The main breaker 210 is connected to the system power supply via the power line 231, and the branch breakers 221 to 223 are connected to the main breaker 210 via the power line 235. A power generation device 320 is connected to the branch breaker 221 through a power line 232. In addition, an electric device 330 is connected to the branch breaker 222 via a power line 233. In addition, an electrical device 340 is connected to the branch breaker 223 via a power line 234.

  The power generation device 320 is, for example, a solar power generation system. The electric devices 330 and 340 are, for example, washing machines or refrigerators. The distribution board 200 has a function of returning surplus power to the system power supply. Therefore, the main load 310 functions as a power supply system when the power supplied by the power generation device 320 exceeds the power consumption of the electrical equipment in the building.

  As shown in FIG. 2, the power measurement system 100 measures a plurality of measurement devices (measurement devices 111 to 113) that measure the power consumed by the load, the power supplied by the power feeding system, and the like and output the measured power to the main device 120. And a main device 120 that calculates a power consumption amount of a load and a power supply amount of a power feeding system based on measurement data acquired from the device.

  The measurement devices 111 to 113 are devices that serve as measurement units of the power measurement system 100. The measuring devices 111 to 113 are composed of, for example, an AD converter, a processor, and the like. The measuring devices 111 to 113 are connected to power supply lines 231 to 233 via voltage inputs 111a to 113a, respectively. The measuring devices 111 to 113 sequentially AD-convert the voltages input from the voltage inputs 111a to 113a, and based on the converted values, loads and power supply systems (the main load 310, the power generation device 320, and the electric device 330). ) Is calculated (hereinafter referred to as “voltage measurement value”). The measured voltage values calculated by the measuring devices 111 to 113 may be effective values or instantaneous values.

  The measuring devices 111 to 113 are also connected to current transformers 111b to 113b in addition to the voltage inputs 111a to 113a. Current transformers 111b to 113b are electrically coupled to power supply lines 231 to 233, respectively, and output a detection voltage proportional to the current flowing through power supply lines 231 to 233. The measuring devices 111 to 113 sequentially AD-convert the detection voltages input from the current transformers 111b to 113b, and based on the converted values, loads and power supply systems (the main load 310, the power generation device 320, and the electric equipment) 330) is calculated (hereinafter referred to as “current measurement value”). The measured current values calculated by the measuring devices 111 to 113 may be effective values or instantaneous values.

  Moreover, the measuring devices 111 to 113 calculate a power measurement value based on the voltage measurement value and the current measurement value. The power measurement value is a value of power consumed by a load (main load 310 or electric device 330) or a value of power supplied to a distribution system or a system power supply by a power feeding system (power generation device 320 or main load 310).

  The measuring devices 111 to 113 calculate voltage measurement values, current measurement values, and power measurement values at regular time intervals (for example, 0.1 second intervals, hereinafter referred to as collection intervals). And the measurement apparatuses 111-113 will transmit to the main apparatus 120 sequentially as one measurement data, if a voltage measurement value, a current measurement value, and a power measurement value are calculated. The current measurement value, the voltage measurement value, and the power measurement value may be transmitted separately. For example, the measurement devices 111 to 113 may attach measurement times to the current measurement value, the voltage measurement value, and the power measurement value, respectively, and store and transmit them in different packets. Even if it is transmitted separately, it can be regarded as one measurement data. Further, the voltage measurement value, current measurement value, and power measurement value stored in the measurement data do not necessarily have to be in the form as they are. For example, the power measurement value may be stored in the measurement data in the form of the integrated power amount per collection interval. If the voltage measurement value, the current measurement value, and the power measurement value can be finally extracted from the measurement data, the data stored in the measurement data is arbitrary.

  The main device 120 includes an input unit 121 serving as a user interface, a storage unit 122 that stores a range of normal values of measurement values included in the measurement data, and a data collection unit 123 that acquires measurement data from the measurement devices 111 to 113. And a processing unit 124 that calculates the amount of power based on the measurement data, and a display unit 125 that displays the amount of power calculated by the processing unit 124.

  The input unit 121 is a device for inputting type specifying information for specifying the type of measurement target of the measuring devices 111 to 113. The input unit 121 includes input devices such as a keyboard, a mouse, and a touch panel. As shown in FIG. 3, for example, the type specifying information is configured from information in which identification information for identifying a measuring device and type information indicating a type of a measurement target of the measuring device are associated with each other. The type information may be text information such as “solar power generation system”, “washing machine”, and “refrigerator”, or may be code information such as A01 and B02. This type specifying information is input from, for example, a setting screen as shown in FIG.

  Returning to FIG. 2, the storage unit 122 includes a storage device such as a dynamic random access memory (DRAM), a static random access memory (SRAM), a flash memory, and a hard disk. As shown in FIG. 5, the storage unit 122 stores various data such as normal range data 122a, range specifying data 122b, and integrated power data 122c.

  The normal range data 122a is information in which type information indicating the type of load or power supply system and normal range information indicating a normal value range of measurement data and comparison values (hereinafter referred to as “normal range”) are associated with each other. is there. The normal range information includes information on a normal voltage range indicating a normal voltage measurement value range, a normal current range indicating a normal current measurement value range, and a normal comparison value range indicating a normal comparison value range. The comparison value is a ratio of the power measurement value to the apparent power value calculated based on the voltage measurement value and the current measurement value. Details of the comparison value will be described later in the description of the electric energy calculation process.

  The range specifying data 122b includes identification information for identifying a measurement device, measurement data measured by the measurement device indicated by the identification information, and normal range information indicating a normal range of a comparison value calculated based on the measurement data. The associated information. The range specifying data 122b is updated by a range specifying process described later.

  The integrated power data 122c is information that associates identification information for identifying the measurement device and the integrated power amount of the measurement target of the measurement device indicated by the identification information. The accumulated power data 122c stores information on the accumulated power amount of each measuring device. This integrated electric energy is updated by the electric energy calculation process mentioned later.

  The data collection unit 123 includes an external device connection interface such as a LAN (Local Area Network) interface or a USB (Universal Serial Bus) interface. The data collection unit 123 acquires measurement data transmitted from the measurement devices 111 to 113 at regular intervals (for example, 0.1 second interval; hereinafter referred to as “collection interval”) and transmits the measurement data to the processing unit 124. . At this time, the data collection unit 123 transmits measurement data together with the measurement device specifying information. Here, the “measurement device specifying information” is information for specifying from which of the measurement devices 111 to 113 the measurement data is acquired. The measurement device specifying information is, for example, an identification number uniquely assigned to each of the measurement devices 111 to 113.

  Returning to FIG. 2, the processing unit 124 includes a processing device such as a processor. The processing unit 124 operates according to a program stored in a ROM (Read Only Memory) or a RAM (Random Access Memory) (not shown), and performs various operations including a “range specifying process” and an “electric energy calculation process” described later. Run. The processing unit 124 functions as a range specifying unit 124a, a determination unit 124b, and a calculation unit 124c as shown in FIG. 6 by operating according to a program. These functions will be described later in the description of “range specifying process” and “power amount calculation process”.

  Returning to FIG. 2, the display unit 125 includes a display device such as an LCD (Liquid Crystal Display). The display unit 125 displays the power amount calculated in the power amount calculation process based on the control of the processing unit 124.

  Next, the operation of the power measurement system 100 having such a configuration will be described.

  The processing of the power measurement system 100 includes a “range specifying process” for specifying a normal range of comparison values calculated based on measurement data measured by the measurement devices 111 to 113, and measurement data measured by the measurement devices 111 to 113. This is divided into “power amount calculation processing” for calculating the power amount of the load and the power feeding system based on the above. First, the “range specifying process” will be described.

  When the user operates the input unit 121 to input the type specifying information to the main device 120 of the power measurement system 100 (for example, when the user presses the enter button displayed on the setting screen in FIG. 4), the processing of the main device 120 The unit 124 starts the range specifying process. The range specifying process will be described below with reference to the flowchart of FIG.

  The range specifying unit 124a of the processing unit 124 acquires the type specifying information input by the user operating the input unit 121 (step S101). In the following description, in order to facilitate understanding, it is assumed that the range specifying unit 124a has acquired the three type specifying information shown in FIG.

  Returning to the flow of FIG. 7, the range specifying unit 124a specifies the normal range of the measurement data and the comparison value for each of the measuring devices 111 to 113 (step S102). The normal range is specified based on the type specifying information acquired in step S101 and the normal range data 122a shown in FIG. If the measuring device 111 is described as an example, the range specifying unit 124a specifies that the type of the measuring device 111 is “main load” from the type specifying information shown in FIG. Then, the range specifying unit 124a calculates the measurement data measured by the measurement device 111 and the comparison calculated based on the measurement data from the normal range information of “main load” recorded in the normal range data 122a illustrated in FIG. Identify the normal range of values. In the example of FIG. 5, the range specifying unit 124 a specifies the normal voltage range as 90 to 110 V, the normal current range as −100 to 100 A, and the normal comparison value range as −1.0 to 1.0.

  Returning to the flow of FIG. 7, the range specifying unit 124a updates the range specifying data 122b shown in FIG. 5 based on the information of the normal range specified in step S102. When the range specifying data 122b is not created in the storage unit 122, the range specifying data 122b is newly generated based on the information of the normal range specified in step S102 (step S103). When the update or generation of the range specifying data 122b is completed, the range specifying process is completed.

  Next, the power amount calculation process will be described.

  When the processing unit 124 of the main device 120 acquires measurement data transmitted from the measurement devices 111 to 113 every collection interval (for example, 0.1 second), the processing unit 124 starts an electric energy calculation process. The power amount calculation process is executed every time the processing unit 124 acquires measurement data. The “power amount calculation process” will be described below with reference to the flowchart of FIG.

  The processing unit 124 acquires measurement data from the data collection unit 123. At this time, the processing unit 124 also acquires measurement device specifying information for specifying which of the measurement devices 111 to 113 has acquired the measurement data (step S201).

  Subsequently, the determination unit 124b of the processing unit 124 determines whether or not the voltage measurement value included in the measurement data is within the normal range (step S202). Specifically, the determination unit 124b transmits the measurement data acquired in step S201 from any of the measurement devices 111 to 113 based on the measurement device identification information acquired from the data collection unit 123. Identify what is. Then, the determination unit 124b extracts the normal voltage range of the specified measuring device from the range specifying data 122b illustrated in FIG. Then, the determination unit 124b determines whether or not the voltage measurement value included in the measurement data acquired in step S201 is within the extracted normal voltage range. If not within the normal voltage range (step S202: No), the determination unit 124b determines that abnormal measurement data has been acquired, and ends the power amount calculation process. If the voltage is within the normal voltage range (step S202: Yes), the process proceeds to step S203.

  When the voltage measurement value is within the normal voltage range (step S202: Yes), the determination unit 124b determines whether or not the current measurement value included in the measurement data is within the normal range (step S203). Specifically, the determination unit 124b extracts a corresponding normal current range from the range specifying data 122b illustrated in FIG. Then, the determination unit 124b determines whether or not the current measurement value included in the measurement data acquired in step S201 is within the extracted normal current range. If not within the normal current range (step S203: No), the determination unit 124b determines that abnormal measurement data has been acquired, and ends the power amount calculation process. When it is within the normal current range (step S203: Yes), the process proceeds to step S204.

  Next, the determination unit 124b includes the power measurement value included in the measurement data acquired in step S201, and the apparent power value calculated based on the voltage measurement value and the current measurement value included in the measurement data acquired in step S201. It is determined whether or not the comparison result of the above satisfies a preset criterion. Specifically, the determination unit 124b determines whether the comparison value between the power measurement value and the apparent power value is within the normal range. This determination is realized by the following steps S204 to S205.

  First, the determination unit 124b calculates a comparison value using the apparent power value calculated based on the voltage measurement value, the current measurement value, and the power measurement value included in the measurement data acquired in step S201. (Step S204). The comparison value is a ratio of the power measurement value to the apparent power value calculated based on the voltage measurement value and the current measurement value. The comparison value is calculated by, for example, the following formula (1). In Expression (1), C is a comparison value, and Pa is a power measurement value included in the measurement data acquired in step S201. Pb is an apparent power value calculated based on the measured voltage value Va and the measured current value Ia. The apparent power value is calculated by the following formula (2), for example. Va and Ia included in Equation (2) are a voltage measurement value and a current measurement value included in the measurement data acquired in step S201, respectively.

C = Pa / Pb (1)
Pb = Va × Ia (2)

  Subsequently, the determination unit 124b determines whether or not the comparison value calculated in step S204 is within the normal range (step S205). Specifically, the determination unit 124b extracts the corresponding normal comparison value range from the range specifying data 122b illustrated in FIG. 5, and whether the comparison value calculated in step S204 is within the extracted normal comparison value range. Determine whether or not. If not within the normal comparison value range (step S205: No), the determination unit 124b determines that abnormal measurement data has been acquired, and ends the power amount calculation process. When it falls within the normal comparison value range (step S205: Yes), the process proceeds to step S206.

  When the comparison value is within the normal comparison value range (step S205: Yes), the calculation unit 124c calculates the amount of power per collection interval based on the power measurement value included in the measurement data acquired in step S201, And the calculated electric energy is integrated | accumulated to the integrated electric power data 122c shown in FIG. 5 (step S206). Specifically, based on the measurement device specifying information acquired from the data collection unit 123, the calculation unit 124c specifies from which measurement device 111 to 113 the measurement data acquired in step S201 is transmitted. Then, the calculation unit 124c selects an integrated power amount corresponding to the specified measuring device from a plurality of integrated power amounts stored in the integrated power data 122c. Then, the calculation unit 124c adds the power amount per collection interval to the selected integrated power amount. The amount of power per collection interval is calculated by multiplying the power measurement value included in the measurement data acquired in step S201 by the collection interval. For example, if the power measurement value included in the measurement data acquired in step S201 is 360 W and the collection interval is 0.1 second (= 0.1 / 3600 hours), the calculation unit 124c calculates the power per collection interval. The amount is calculated as 0.01 (= 360 × 0.1 / 3600) Wh. The power amount per collection interval may be obtained by multiplying the power amount by a load power factor.

  When the integration to the integrated power amount is completed, the processing unit 124 ends the power amount calculation process. The processing unit 124 appropriately displays the integrated power amount stored in the integrated power data 122c on the display unit 125 based on an instruction from the user.

  According to the present embodiment, since the abnormality of the measurement data is determined based on the comparison result between the power measurement value and the apparent power value, the abnormality of the measurement data can be accurately detected. Since the electric energy calculated based on the abnormal measurement data is not integrated into the integrated electric energy, the user can obtain highly accurate information on the electric energy. Even if there is a case where the electric energy is not integrated with the integrated electric energy, the value of the electric energy integrated per time is an extremely small value, so that it hardly affects the calculation accuracy of the integrated electric energy. No.

  In addition to whether or not the comparison value is within the normal range, it is also determined whether or not the current measurement value and voltage measurement value are within the normal range, so measurement data abnormalities can be detected more accurately. it can.

  The power measurement system 100 is configured to specify the normal range of the measurement data and the comparison value based on the normal range data 122a stored in the storage unit 122. Therefore, even if the user has no specialized knowledge, the user can easily make the power measurement system 100 recognize the normal range of the measurement data and the comparison value simply by inputting the type information of the load and the power supply system from the input unit 121. be able to.

(Embodiment 2)
In the power amount calculation process of the first embodiment, when abnormal measurement data is acquired, the power amount is not integrated and the process is terminated as it is. However, when abnormal measurement data is continuously acquired, there is a high possibility that a failure has occurred in the load, the power supply system, or the measurement device, not data abnormality due to a communication error. Hereinafter, the power measurement system 100 that determines a failure such as a load or a power supply system based on measurement data measured by the measurement apparatuses 111 to 113 will be described. Note that the device configuration and range specifying process of the power measurement system 100 are the same as those in the first embodiment, and thus the description thereof is omitted. The “power amount calculation process” will be described below.

  When the processing unit 124 of the main device 120 acquires the measurement data from the data collection unit 123, the processing unit 124 starts the power amount calculation process. Hereinafter, the “power amount calculation process” will be described with reference to the flowchart of FIG. 9.

  The processing unit 124 acquires measurement data from the data collection unit 123. At this time, the processing unit 124 also acquires measurement device specifying information (step S301).

  Subsequently, the determination unit 124b of the processing unit 124 determines whether or not the voltage measurement value included in the measurement data is within the normal voltage range (step S302). When the voltage measurement value is not within the normal voltage range (step S302: No), the determination unit 124b proceeds to step S308. If the voltage is within the normal voltage range (step S302: Yes), the process proceeds to step S303.

  When the voltage measurement value is within the normal voltage range (step S302: Yes), the determination unit 124b determines whether or not the current measurement value included in the measurement data is within the normal current range (step S303). When the current measurement value is not within the normal current range (step S303: No), the determination unit 124b proceeds to step S308. When it falls within the normal current range (step S303: Yes), the process proceeds to step S304.

  When the current measurement value is within the normal current range (step S303: Yes), the calculation unit 124c of the processing unit 124 compares the voltage measurement value and the current measurement value included in the measurement data acquired in step S301. Is calculated (step S304).

  Subsequently, the determination unit 124b determines whether or not the comparison value acquired in step S304 is within the normal comparison value range (step S305). When the comparison value is not within the normal comparison value range (step S305: No), the determination unit 124b proceeds to step S308. When it falls within the normal comparison value range (step S305: Yes), the process proceeds to step S306.

  When the comparison value is within the normal comparison value range (step S305: Yes), the determination unit 124b resets the counter (step S306). The counter is a variable prepared in a RAM (not shown), and one counter is prepared for each measuring device. Based on the measurement device specifying information acquired in step S301, the determination unit 124b specifies whether the measurement data acquired in step S301 is transmitted from any of the measurement devices 111 to 113. Then, the determination unit 124b resets the counter of the specified measuring device.

  The computing unit 124c calculates the amount of power per collection interval based on the power measurement value included in the measurement data acquired in step S301. Then, the calculated electric energy is integrated into the integrated electric power data 122c shown in FIG. 5 (step S307). When the integration to the integrated power data 122c is completed, the processing unit 124 ends the power amount calculation process.

  Returning to the flow of FIG. 9, when any of the current measurement value, the voltage measurement value, and the comparison value is abnormal (step S302: No, step S303: No, step S305: No), the determination unit 124b sets the corresponding counter. 1 is added (step S308). Specifically, the determination unit 124b determines from which of the measurement devices 111 to 113 the measurement data acquired in step S301 is transmitted based on the measurement device identification information acquired in step S301. Identify. Then, the determination unit 124b adds 1 to the counter of the specified measuring device.

  Subsequently, the determination unit 124b determines whether the value of the counter is equal to or greater than a preset value (hereinafter referred to as “set value”) (step S309). When the value of the counter is smaller than the set value (step S309: No), the determination unit 124b ends the power amount calculation process. If the counter value is equal to or greater than the set value (step S309: Yes), the abnormality detection is repeated, so that the determination unit 124b determines that an abnormality has occurred in at least one of the load, the power supply system, and the measurement device. Then, the process proceeds to step S310.

  The processing unit 124 notifies the user that an abnormality has occurred in at least one of the load, the power supply system, and the measurement device (step S310). For example, the processing unit 124 may notify the user by displaying an abnormality occurrence message on the display unit 125. When the notification is completed, the processing unit 124 ends the power amount calculation process.

  According to the present embodiment, it is determined that an abnormality has occurred in at least one of the load, the power supply system, and the measurement device when there are consecutive cases in which the abnormality is detected in the measurement data or the comparison value. Can detect abnormalities in the load, power supply system, and measuring device at an early stage.

  When an abnormality occurs in the load or power supply system, there are cases where the power value (for example, the current measurement value or the apparent power value) is normal, but the voltage value or current value is abnormal. Since the power measurement system 100 according to the present embodiment detects an abnormality in the measurement data using not only the power value but also the voltage measurement value and the current measurement value, the abnormality occurring in the load and the power supply system can be detected with high accuracy. Can be found.

  The above-described embodiments are merely examples, and various changes and applications are possible.

  For example, in each of the above-described embodiments, the load is described as being a main load or an electric device, but the load is not limited to the main load or the electric device. For example, the load may be an electric device group including a plurality of electric devices.

  In each of the above-described embodiments, the power supply system has been described as a solar power generation system. However, the power supply system is not limited to the solar power generation system. The power feeding system may be a power generation system other than the solar power generation system, or may be a power storage system such as a lithium ion battery.

  Further, in each of the above-described embodiments, it has been described that there are three measuring devices 111 to 113, but the number of measuring devices is not limited to three. The number of measuring devices may be four or more, or two or less. The number of measurement objects is not limited to three. Four or more may be sufficient and two or less may be sufficient.

  Moreover, in each above-mentioned embodiment, although the measuring devices 111-113 calculated the electric power measured value based on the voltage measured value and the current measured value, the measuring devices 111-113 are input from the voltage inputs 111a-113a. The power measurement value may be calculated based on the voltage and the detection voltage input from the current transformers 111b to 113b. Moreover, the measuring devices 111 to 113 may include a power meter, and may directly measure the power consumption of the main load 310 and the electric device 330 and the power supplied to the power generation device 320 and the main load 310.

  Further, in each of the above-described embodiments, it is determined that the measurement data is abnormal when at least one of the voltage measurement value, the current measurement value, and the comparison value does not fall within the normal range. In addition to the value and the comparison value, the measurement data may be determined to be abnormal when the power value (current measurement value, apparent power value, etc.) does not fall within the normal range.

  In each of the above-described embodiments, the comparison value is described as the ratio of the measured power value to the apparent power value. However, the comparison value may be the ratio of the apparent power value to the measured power value. For example, the comparison value C may be a value calculated by the following formula (3). Note that Pa included in the equation (3) is a current measurement value, and Pb is an apparent power value calculated based on the voltage measurement value Va and the current measurement value Ia.

    C = Pb / Pa (3)

  Note that the comparison value is not limited to the value calculated by the above formula (1) or formula (3) as long as it is the ratio between the apparent power value and the power measurement value. For example, the comparison value may be a value obtained by further multiplying the comparison value C calculated by Expression (1) or Expression (3) by 100.

  In each embodiment described above, the determination unit 124b determines whether or not the measurement data is abnormal based on the comparison value. However, the comparison result for determining whether or not the measurement data is abnormal is as follows. It is not limited to the comparison value. For example, the determination unit 124b may determine whether or not the measurement data is abnormal based on whether or not the difference value between the power measurement value and the apparent power value is within a preset value range. . The difference value may be a difference value D calculated by the following formula (4) or formula (5), for example. In addition, Pa contained in Formula (4) and Formula (5) is a current measurement value, and Pb is an apparent power value calculated based on the voltage measurement value Va and the current measurement value Ia.

D = Pb-Pa (4)
D = Pa-Pb (5)

  Further, in the measurement devices 111 to 113, the determination unit 124b causes the increase rate of the power measurement value to the apparent power value (for example, the increase rate IR calculated by the following equation (6)) or the increase of the apparent power value to the power measurement value. Whether or not the measurement data is abnormal may be determined based on whether or not the rate (for example, the increase rate IR calculated by the following equation (7)) is within a preset value range. In addition, Pa contained in Formula (6) and Formula (7) is a current measurement value, and Pb is an apparent power value calculated based on the voltage measurement value Va and the current measurement value Ia.

IR = (Pa−Pb) / Pb (6)
IR = (Pb−Pa) / Pa (7)

  Moreover, in each above-mentioned embodiment, although the measuring devices 111-113 calculated the electric power measured value based on the voltage measured value and the current measured value, the measuring devices 111-113 measured the voltage measured value and the current measured value. A measuring instrument for measuring (for example, a current transformer or an AD converter) and a measuring instrument for measuring a power measurement value may be different. For example, the measuring devices 111 to 113 are each provided with a measuring instrument for measuring a voltage and a current separately from a measuring instrument used when measuring a voltage measurement value and a current measurement value. And the measuring devices 111-113 measure the electric current and voltage of a load and an electric power feeding system separately from a voltage measured value and an electric current measured value, respectively using the newly installed measuring device. And the measuring devices 111-113 compute an electric power measured value based on the measurement result. Note that the measuring instrument refers to devices and parts that measure current, voltage, and power, such as a current sensor, a voltage sensor, and a power sensor. Since the power measurement value and the apparent power value used for calculation of the comparison value are calculated from the measurement results of the different measuring instruments, the determination unit 124b generates not only an abnormality in measurement data that occurs during communication but also a measurement result that occurs during measurement. It is also possible to determine abnormalities in measured data.

  The power measurement system 100 of the present embodiment may be realized by a dedicated system or may be realized by a normal computer system. For example, the power measurement system 100 is configured by storing and distributing a program for executing the above-described operation in a computer-readable recording medium, installing the program in a computer, and executing the above-described processing. Also good. Further, the program may be stored in a disk device provided in a server device on a network such as the Internet so that it can be downloaded to a computer. Further, the above functions may be realized by cooperation between the OS and application software. In this case, a part other than the OS may be stored and distributed in a medium, or a part other than the OS may be stored in a server device and downloaded to a computer.

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. The above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. In other words, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

  100 power measuring system, 111-113 measuring device, 111a-113a voltage input, 111b-113b current transformer, 120 main unit, 121 input unit, 122 storage unit, 122a normal range data, 122b range specifying data, 122c integrated power data, 123 data collection unit, 124 processing unit, 124a range identification unit, 124b determination unit, 124c calculation unit, 125 display unit, 200 distribution board, 210 main breaker, 221 to 223 branch breaker, 231 to 235 power line, 310 main load 320 Power generator, 330, 340 Electrical equipment.

Claims (9)

A power measurement value obtained by measuring the power consumed by the load or the power supplied by the power supply system, and a current value that is measured when the power measurement value is measured and that is input to or output from the load or the power supply system And a data collection means for sequentially acquiring measurement data including a current measurement value and a voltage measurement value obtained by measuring a voltage from the measurement unit,
A comparison result between the power measurement value included in the measurement data acquired by the data collection unit and the apparent power value calculated based on the current measurement value and the voltage measurement value included in the measurement data is in advance. A discriminating means for discriminating whether or not a set standard is satisfied;
Based on the measurement data determined that the comparison result satisfies a preset criterion, without using the measurement data determined that the comparison result does not satisfy a preset criterion, Calculating means for calculating the power consumption amount of the load or the power supply amount of the power supply system,
Power measurement system. The comparison result is a ratio of the measured power value to the apparent power value, or a ratio of the apparent power value to the measured power value,
The determining means determines whether the ratio is a value within a preset range,
The calculation means uses the measurement data determined that the ratio is not a preset range value based on the measurement data determined that the ratio is a preset range value. Without calculating the power consumption amount of the load or the power supply amount of the power supply system,
The power measurement system according to claim 1. Storage means for storing normal range data in which the type information indicating the type of the load or the power supply system and the normal range information indicating the range of the normal value of the ratio are associated;
Input means for inputting specific information for specifying a type of the load or the power supply system;
Based on the specific information input from the input means, the type of the load or the power feeding system that is the measurement target in the measurement unit is specified, the specified type and the normal range data stored in the storage means, A range specifying means for specifying a range of the normal value of the ratio based on
The determining means determines whether or not the ratio is within the range of the normal value specified by the range specifying means,
The calculation means uses the measurement data determined that the ratio does not fall within the normal value range based on the measurement data determined that the ratio falls within the normal value range. Without calculating the amount of power consumption of the load or the amount of power supplied to the power supply system,
The power measurement system according to claim 2. The determination means determines whether the current measurement value and the voltage measurement value satisfy a preset criterion, in addition to determining whether the comparison result satisfies a preset criterion. Determine
The calculation means is configured to calculate the comparison result, the current measurement value, and the current measurement value based on the measurement data determined that all of the current measurement value and the voltage measurement value satisfy a predetermined criterion. Without using the measurement data determined that at least one of the voltage measurement values does not satisfy a preset criterion, to calculate the power consumption of the load or the power supply of the power supply system,
The power measurement system according to any one of claims 1 to 3. The discriminating unit discriminates whether or not the comparison result satisfies a preset standard every time the measurement data is acquired by the data collecting unit, and determines whether the comparison result is a preset reference. When the case determined to be not satisfied continues for a preset number of times or more, it is determined that an abnormality has occurred in at least one of the load, the power supply system, and the measurement unit.
The power measurement system according to any one of claims 1 to 3. The determination unit determines whether the comparison result, the current measurement value, and the voltage measurement value satisfy a predetermined criterion every time the measurement data is acquired by the data collection unit. The load and the power supply system when a case where it is determined that at least one of the comparison result, the current measurement value, and the voltage measurement value does not satisfy a preset criterion continues for a preset number of times. And determining that an abnormality has occurred in at least one of the measurement units,
The power measurement system according to claim 4. The current measurement value, the voltage measurement value, and the power measurement value are measured, and the measurement unit transmits the measurement result to the data collection unit as the measurement data.
The measurement unit measures the power measurement value using a measurement device different from the measurement device used to measure the current measurement value and the voltage measurement value.
The power measurement system according to any one of claims 1 to 6. A power measurement value obtained by measuring the power consumed by the load or the power supplied by the power supply system, and a current value that is measured when the power measurement value is measured and that is input to or output from the load or the power supply system And a data collection step of sequentially acquiring measurement data including a current measurement value and a voltage measurement value obtained by measuring voltage from the measurement unit,
A comparison result between the power measurement value included in the measurement data acquired in the data collection step and the apparent power value calculated based on the current measurement value and the voltage measurement value included in the measurement data is in advance. A determination step for determining whether or not a set criterion is satisfied;
Based on the measurement data determined that the comparison result satisfies a preset criterion, without using the measurement data determined that the comparison result does not satisfy a preset criterion, Calculating a power consumption amount of the load or a power supply amount of the power feeding system,
Power measurement method. On the computer,
A power measurement value obtained by measuring the power consumed by the load or the power supplied by the power supply system, and a current value that is measured when the power measurement value is measured and that is input to or output from the load or the power supply system And a data collection function for sequentially acquiring measurement data including a current measurement value and a voltage measurement value obtained by measuring a voltage from the measurement unit,
A comparison result between the power measurement value included in the measurement data acquired by the data collection function and the apparent power value calculated based on the current measurement value and the voltage measurement value included in the measurement data is in advance. A discriminating function for discriminating whether or not a set standard is satisfied;
Based on the measurement data determined that the comparison result satisfies a preset criterion, without using the measurement data determined that the comparison result does not satisfy a preset criterion, An arithmetic function for calculating the power consumption amount of the load or the power supply amount of the power feeding system is realized.
program.

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