JP5712008B2 - Power generation amount calculation device, power generation amount calculation method, and power generation amount calculation program - Google Patents

Description

  The present invention relates to a power generation amount calculation device, a power generation amount calculation method, and a power generation amount calculation program.

  Distributed power sources are installed in various places such as general homes and factories. The distributed power source is, for example, a photovoltaic power generation system (PV: Photovoltaic), wind power generation, fuel cell, micro gas turbine, engine power generation, or the like.

  Here, the amount of power generated by the distributed power source is buried in the load of the power system when viewed from the electric power company. For example, the power consumption consumed by the general home “A” and the power supplied by the power company to the general home “A” will be described using a case where a distributed power source is introduced into the general home “A”. Note that the absolute value of the amount of power generated by the distributed power source installed in the general home “A” is assumed to be “P1”. Further, the absolute value of the power consumption by the general household “A” is assumed to be “P2”.

  In this case, the electric power supplied to the general household “A” by the power company is the amount of power consumed by the general household “A” that cannot be exceeded by the amount of power generated by the distributed power source. Specifically, the power supplied to the general household “A” by the power company is “P2−P1”, not the power consumption “P1” actually consumed by the general household “A”. In other words, the power consumption of the general household “A” viewed from the power company is “P2−P1”. That is, the power consumption of the general household “A” viewed from the power company is more than the power consumption actually consumed by the general household “A” by the amount of power generated by the distributed power source installed in the general home “A”. Get smaller. Here, what the electric power company sees is “P2-P1”, which is the apparent power consumption of the general household “A”, and the power generation amount “P2” by the distributed power source is buried in the load of the power system.

  There is a method in which an electric power company calculates the amount of power generated by a distributed power source. For example, there is a system in which a communication control device is provided in each distributed power source, and the communication control device provided in each distributed power source transmits the power generation amount of the distributed power source to an electric power company.

JP 2007-288877 A

  However, there is a problem that the power company cannot easily grasp the power generation amount of the distributed power source. For example, in the conventional technology described above, a communication control device must be provided for each distributed power source installed in a general household, and the power company cannot easily grasp the power generation amount of the distributed power source.

  The disclosed technology has been made in view of the above, and an object thereof is to provide a power generation amount calculation device, a power generation amount calculation method, and a power generation amount calculation program capable of grasping the power generation amount of a distributed power source.

In one embodiment, the disclosed power generation amount calculation apparatus includes a changing unit that changes the voltage of the power supplied to the power grid. In addition, the power generation amount calculation device includes a measuring unit that measures the active power of the power network whose voltage is changed by the changing unit. Further, the power generation amount calculation device is configured such that the denominator is a voltage before the change using the rated voltage as a denominator and a value obtained by multiplying a value using the voltage after the change as a denominator by a predetermined voltage characteristic index. Is a value obtained by subtracting a value obtained by multiplying a value having a numerator by the voltage characteristic exponent, and a numerator is a value obtained by multiplying the rated voltage of the power network by a denominator and a value having a voltage before change by a predetermined voltage characteristic exponent From the value obtained by multiplying the active power measured after the change to the value obtained by multiplying the rated voltage as the denominator and the voltage characteristic index multiplied by the value after the change, the active power measured before the change is multiplied. A power generation amount calculation unit that calculates a power generation amount by a distributed power source connected to the power network by calculating a value that is a value obtained by subtracting the value is provided.

  According to one aspect of the disclosed power generation amount calculation device, there is an effect that the power generation amount of the distributed power source can be grasped.

FIG. 1 is a block diagram illustrating an example of the configuration of the power generation amount calculation apparatus according to the first embodiment. FIG. 2 is a diagram illustrating an example of a relationship between the power network, the point where the voltage is changed, and the point measured by the sensor in the first embodiment. FIG. 3 is a diagram illustrating an example of information stored in the voltage characteristic index table according to the first embodiment. FIG. 4 is a diagram illustrating an example of actually measured values in the power network. FIG. 5 is a flowchart illustrating an example of processing performed by the power generation amount calculation apparatus according to the first embodiment. FIG. 6 is a diagram illustrating that the information processing by the power generation amount calculation program for executing a series of processes by the power generation amount calculation device is specifically realized using a computer.

  Hereinafter, embodiments of the disclosed power generation amount calculation device, power generation amount calculation method, and power generation amount calculation program will be described in detail with reference to the drawings. Note that the invention disclosed by this embodiment is not limited. Each embodiment can be appropriately combined within a range in which processing contents do not contradict each other.

[Configuration of power generation amount calculation apparatus according to Embodiment 1]
FIG. 1 is a block diagram illustrating an example of the configuration of the power generation amount calculation apparatus according to the first embodiment. As shown in FIG. 1, the power generation amount calculation device 100 changes the voltage of the power grid, and the distributed power source connected to the power grid based on the voltage before and after the change and the active power, as will be described in detail below. Calculate the amount of power generated by.

  The power generation amount calculation device 100 is connected to an adjustment device 200 that adjusts the voltage of the power supplied to the power network, and a sensor 300 that measures the effective power of the power supplied to the power network. In the example illustrated in FIG. 1, the power generation amount calculation device 100, the adjustment device 200, and the sensor 300 are separate devices, and the power generation amount calculation device 100 is connected to the adjustment device 200 and the sensor 300. It is not limited to this. For example, one or both of the adjustment device 200 and the sensor 300 may be integrated with the power generation amount calculation device 100.

  The adjustment device 200 is connected to the power generation amount calculation device 100. The adjustment device 200 adjusts the voltage of power supplied to the power network. As will be described later, the control unit 120 changes the operating state of the adjustment device 200, thereby changing the voltage of the power supplied to the power grid.

  The adjusting device 200 corresponds to, for example, an arbitrary phase adjusting facility such as a transformer tap or a static capacitor (stacon) provided in the power grid. The adjusting device 200 is not limited to a transformer tap or phase adjusting equipment provided in the power network, and any device may be used. Specifically, any equipment having a function of changing the voltage of power supplied to the power grid may be used as the adjustment device 200.

  Sensor 300 measures the active power of the power grid. Hereinafter, a case where the sensor 300 measures active power and voltage supplied to the power grid will be described as an example.

  FIG. 2 is a diagram illustrating an example of a relationship between the power network, the point where the voltage is changed, and the point measured by the sensor in the first embodiment. FIG. 2 is an example of a power system diagram. As shown in FIG. 2, the electric power generated by the power plant 401 is sent to the load 404, the load 405, and the load 406 after the voltage is changed by the substation 402 and the substation 403. Note that the loads 404 to 406 correspond to, for example, a residential area, a commercial area, an industrial area, and the like. In the example illustrated in FIG. 2, a case where PV (solar power generation system, Photovoltaic) 407, PV408, and PV409, which are distributed power sources, are introduced into the loads 404 to 406, respectively.

  The power system diagram shown in FIG. 2 will be described in more detail. In the example shown in FIG. 2, the electric power generated by the power plant 401 is sent to the substation 402 via the transmission line 411. Here, the substation 402 changes the voltage of the power sent from the power plant 401 to “66 kV”, for example. Then, the substation 402 sends power having a voltage of “66 kV” via the power transmission line 412, the power transmission line 413, the distribution line 414, the power transmission line 415, the power transmission line 416, and the like. Thereafter, for example, when the substation 403 receives electric power with a voltage of “66 kV” from the substation 402 via the transmission line 413, the substation 403 changes the voltage of the received electric power to “6.6 kV”. Then, the substation 403 sends electric power having a voltage of “6.6 kV” to the loads 404 to 406 and the like via the distribution line 414.

  In the description using the power system diagram shown in FIG. 2, the description will be made using the case where the adjustment device 200 is provided in the substation 402. However, it is not limited to this, and the adjustment apparatus 200 may be provided in arbitrary places.

  In FIG. 2, the location where the sensor 300 measures the voltage will be described. The point at which the sensor 300 measures the voltage is a location where electric power whose voltage is changed by the adjustment device 200 flows. In the example illustrated in FIG. 2, the adjustment device 200 is provided in the substation 402, and as a result, the location on the load side of the substation 402 in the power system diagram of FIG. 2. For example, the sensor 300 measures the voltage at the measurement point 501.

  In FIG. 2, the location where the sensor 300 measures active power will be described. The point at which the sensor 300 measures the effective power is a location where electric power having the same voltage as the voltage measured by the sensor 300 flows. A case where the sensor 300 measures a voltage at the measurement point 501 will be described. In this case, in the example illustrated in FIG. 2, the position is on the load side from the substation 402 and on the power plant 401 side from the substation 403. For example, the sensor 300 measures active power at the measurement point 501, the measurement point 502, the measurement point 503, the measurement point 504, and the like.

  In FIG. 2, a power network in which the amount of power generated by a distributed power source is calculated will be described. The power network in which the amount of power generated by the distributed power source is calculated is a range in which the voltage measured by the sensor 300 or the power of active power is supplied. For example, when the sensor 300 measures active power at the measurement point 502, the power network in which the amount of power generated by the distributed power source is calculated is a range 601 on the load side from the measurement point 502 in the power system diagram of FIG. Become. Similarly, when the sensor 300 measures active power at the measurement point 503 or the measurement point 504, the power networks from which the amount of power generated by the distributed power source is calculated are a range 602 and a range 603, respectively.

  Returning to the description of FIG. As illustrated in FIG. 1, the power generation amount calculation device 100 includes an input unit 101, an output unit 102, a storage unit 110, and a control unit 120. The input unit 101 is connected to the control unit 120. The input unit 101 receives information and instructions from a user who uses the power generation amount calculation apparatus 100 and inputs the received information and instructions to the control unit 120. The input unit 101 corresponds to a keyboard, a mouse, a microphone, or the like. The output unit 102 is connected to the control unit 120. The output unit 102 receives information from the control unit 120 and outputs the received information. The output unit 102 corresponds to a monitor or a speaker. The details of information and instructions received by the input unit 101 and the details of information output by the output unit 102 will be described as appropriate when each related unit is described.

  The storage unit 110 is connected to the control unit 120. The storage unit 110 stores data used for various processes by the control unit 120. The storage unit 110 corresponds to, for example, a semiconductor memory device such as a RAM (Random Access Memory) or a flash memory, or a hard disk or an optical disk. In the example illustrated in FIG. 1, the storage unit 110 includes a voltage characteristic index table 111.

  The voltage characteristic index table 111 stores the voltage characteristic index of the power grid. The voltage characteristic index indicates α in (Expression 1) indicating the voltage characteristic of the following load.

In (Equation 1), “P ₀ ” indicates a load when the voltage of the power grid becomes the rated voltage. “V ₀ ” indicates the rated voltage of the power grid. “P” indicates a load when the voltage of the power grid is “V”. The voltage characteristic index is calculated, for example, by actually measuring active power, voltage, and frequency. The voltage characteristic index is “α = 2” when the voltage characteristic of the load in the power grid is a constant impedance characteristic, and “α = 1” when the voltage characteristic is a constant current characteristic. When the voltage characteristic is a constant power characteristic, “α = 0”.

  FIG. 3 is a diagram illustrating an example of information stored in the voltage characteristic index table according to the first embodiment. As shown in FIG. 3, the voltage characteristic index table 111 stores the voltage characteristic index and the conditions of the power network to which the voltage characteristic index is applied in association with each other. In the example illustrated in FIG. 3, the voltage characteristic index table 111 stores the voltage characteristic index “0” and the condition “factory” in association with each other. The voltage characteristic index table 111 stores the voltage characteristic index “2” and the condition “residential area” in association with each other. The voltage characteristic index table 111 stores the voltage characteristic index “1” and the condition “undesignated” in association with each other.

  That is, the voltage characteristic index table 111 stores “0” as the voltage characteristic index applied to the power network including the factory. Further, the voltage characteristic index table 111 stores “2” as a voltage characteristic index applied to a power network including a residential area. In addition, the voltage characteristic index table 111 stores “1” as a voltage characteristic index applied when not specified by the user.

  In other words, a motor often used in a factory has a property of making power consumption constant. As a result, the voltage characteristic of the load in the power grid including the factory is often close to the constant power characteristic. Based on this, in this embodiment, the voltage characteristic index table 111 stores “0” as the voltage characteristic index applied to the power network including the factory. This numerical value is an example, and the voltage characteristic is not limited to an integer, and “0.5” can be designated.

  In this embodiment, the voltage characteristic index table 111 is used as a voltage characteristic index applied to the power network including the residential area because the voltage characteristic index is often close to “2” in the power network including the residential area. “2” is stored. In addition, the voltage characteristic index table 111 is applied when there is no designation by the user in view of the fact that the effects of factories and residential areas are averaged in a general power grid and the voltage characteristic index becomes close to “1”. "1" is stored as the voltage characteristic index. In addition, since it is known that the characteristics of the entire load are close to “1”, there is a method in which “1” is uniformly set as the same numerical value even if the factories and houses can be distinguished.

  Returning to the description of FIG. The control unit 120 is connected to the input unit 101, the output unit 102, and the storage unit 110. The control unit 120 has an internal memory that stores a program that defines various processing procedures and the like, and controls various processes. The control unit 120 corresponds to, for example, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a central processing unit (CPU), or a micro processing unit (MPU). In the example illustrated in FIG. 1, the control unit 120 includes a change unit 121, a measurement unit 122, and a power generation amount calculation unit 123.

  The changing unit 121 changes the voltage of power supplied to the power network. Specifically, the changing unit 121 changes the voltage by switching the operation state of the adjusting device 200 that adjusts the voltage of the power supplied to the power grid. For example, the changing unit 121 operates or does not operate a phase adjusting facility such as a transformer tap or a stacone provided in the power network, or turns on or off the phase adjusting facility, thereby changing the voltage of the power network. Is slightly changed.

  At the calculation timing for calculating the amount of power generated by the distributed power source, the changing unit 121 sends the fact that the active power is measured to the measuring unit 122, and receives the fact that the active power is measured from the measuring unit 122, and then is supplied to the power network. Change the power voltage. Then, after changing the voltage of the power supplied to the power network, the changing unit 121 sends a message indicating that the voltage has been changed to the measuring unit 122. Note that the calculation timing corresponds to, for example, a timing when an instruction to be calculated by the user is input to the input unit 101 or an arbitrary timing.

  Here, it supplements about the change of the voltage by the change part 121. FIG. An electric power company that supplies electric power has an adjustment device that adjusts the voltage of the electric power at a substation or a power plant. As a result, in the first embodiment, the current power generation amount by the distributed power source connected to the power grid is reduced as described in detail below by changing the voltage minutely using the facilities originally provided by the electric power company. It can be calculated.

  The measuring unit 122 measures the active power of the power network whose voltage is changed by the changing unit 121. Specifically, the measurement unit 122 controls the sensor 300 to measure the active power and voltage of the power grid before and after the voltage is changed by the changing unit 121.

  For example, when the measurement unit 122 receives a message to be measured from the change unit 121, the measurement unit 122 measures active power and voltage. After that, when receiving the fact that the voltage has been changed from the changing unit 121, the measuring unit 122 measures the active power and the voltage, and transmits the fact that the active power has been measured to the changing unit 121. Here, the active power and the voltage measured when the effect of measurement is received from the changing unit 121 are the active power and the voltage before the change of the voltage. Moreover, the active power and voltage measured when the fact that the voltage has been changed is received from the changing unit 121 are the effective power and voltage after the change of the voltage. However, the measurement timing by the measurement unit 122 is not limited to this. The measurement unit 122 may always measure active power and voltage.

  When the amount of change in active power measured by the measurement unit 122 is larger than the amount of change in voltage before and after the change by the change unit 121, the amount of power generated by the distributed power source connected to the power grid is large. In this case, a smaller value is calculated as compared with the case where the change amount of the active power is small. In addition, the power generation amount calculation unit 123, when the amount of change in active power measured by the measurement unit 122 is smaller than the amount of change in voltage by the change unit 121 as the power generation amount by the distributed power source connected to the power grid, A large value is calculated as compared with the case where the amount of change in the active power is large.

Specifically, the power generation amount calculation unit 123 calculates the power generation amount by the distributed power source connected to the power network based on the following (Equation 2). In (Expression 2), “P _PV ” indicates the amount of power generated by the distributed power source. “V ₁ ” indicates a voltage before being changed by the changing unit 121. “V ₂ ” indicates the voltage after being changed by the changing unit 121. “P ₁ ” indicates active power (load) before being changed by the changing unit 121. “P ₂ ” indicates active power (load) after being changed by the changing unit 121. “Α” represents a voltage characteristic index. Note that “P ₁ ” and “P ₂ ” are active power viewed from the electric power company, and are values including the amount of power generated by the distributed power source. In the following description, the load consumption is assumed to be a “positive” value, and the power generation amount is assumed to be a “negative” value.

  That is, as shown in (Equation 2), the power generation amount calculation unit 123 uses a value obtained by multiplying the denominator by a predetermined voltage characteristic index by a value obtained by using the rated voltage of the power grid as a denominator and the voltage after the change as a numerator. The value obtained by multiplying the voltage characteristic index by the value with the rated voltage as the denominator and the voltage before the change as the numerator is subtracted, and the numerator is a value with the rated voltage of the power grid as the denominator and the voltage before the change as the numerator. From the value obtained by multiplying the value multiplied by the voltage characteristic index of the active power measured after the change, the value obtained by multiplying the voltage after the change by the rated voltage as the denominator and the value obtained by multiplying the voltage characteristic index by the voltage characteristic index The power generation amount of the distributed power source is calculated by calculating a value obtained by subtracting the value obtained by multiplying the measured active power.

Here, how to derive (Equation 2) will be further described. First, the voltage characteristic of the load is expressed by the above (Equation 1). Here, it is assumed that the voltage of the power grid has changed from “V ₁ ” to “V ₂ ”. Further, it is assumed that the load value including the amount of power generated by the distributed power source changes from “P ₁ ” to “P ₂ ” with the change in voltage.

In this case, a change in load that does not include the amount of power generated by the distributed power source is expressed by (Equation 3) or (Equation 4). In (Equation 3) and (Equation 4), “P _PV ” indicates the power generation amount of the distributed power source. As described above, when the load consumption is a “positive” value and the power generation amount is a “negative” value, the load that does not include the power generation amount by the distributed power source is changed to “P _PV ” as “P ₁ ”. "Or" P ₂ ". “P ₀ ” indicates the load at the rated voltage not including the amount of power generated by the distributed power source.

  Here, from (Equation 3) and (Equation 4), (Equation 5) is derived by deleting “P0” which is an unknown value.

  Further, in (Equation 5), (Equation 6) is derived by performing a transformation that eliminates the denominators of the right side and the left side.

  Further, by arranging (Equation 6), (Equation 2) described above is derived through (Equation 7).

  FIG. 4 is a diagram illustrating an example of actually measured values in the power network. The actual measured values shown in FIG. 4 include photovoltaic power generation by connecting a total of nine PCS (Power Conditioning System) for photovoltaic power generation (three units for each phase) with a power system simulator and further connecting a 30 kW resistive load. This is the actual measurement obtained when the system load is simulated.

  In FIG. 4, the horizontal axis is the time axis, and the voltage of the power grid, the system load in the power grid, the amount of power generated by solar power generation, and the resistance load are shown. In addition, the system load in an electric power network shows the active power seen from the electric power company. The resistance load indicates the power consumption actually consumed by the load. Here, what the electric power company can see is the voltage of the power grid and the system load in the power grid. The amount of power generated by solar power generation and the resistance load are shown together for convenience of explanation. In addition, the horizontal axis of each figure is common. The “system load in the power grid” in FIG. 4 is a combination of “amount of power generated by photovoltaic power generation” and “resistance load”. In the example shown in FIG. 4, the amount of power generated by solar power generation is described as a “positive” value, and “system load in the power grid” in FIG. 4 is changed from “resistance load” to “power generation amount by solar power generation”. "Is subtracted.

  In the example shown in FIG. 4, the static capacitor is inserted at about “2 s” and opened at about “22 s”. Moreover, the case where the tap of the transformer is operated in the direction of increasing the voltage after “22 s” and the tap operated at “43 s”, “61 s”, “78 s”, and “85 s” is changed is shown.

  As shown in “Power generation by photovoltaic power generation” in FIG. 4, even if the voltage of the power grid changes, the power generation by solar power generation is almost constant without being changed except during a voltage change transient. . On the other hand, as shown in “resistive load” in FIG. 4, the resistive load varies as the voltage of the power grid changes.

  That is, when a distributed power source is introduced, the apparent load (power consumption) seen by the power company is reduced according to the amount of power generated by the distributed power source, and the effective power of the power network changes. Here, when the voltage of the electric power supplied by the electric power company is changed, the power generation amount of the distributed power source does not change except during a transient when the amount of solar radiation does not change, while the power consumption consumed at home changes. Focusing on these points, the power generation amount calculation apparatus 100 according to the first embodiment employs a configuration that changes the voltage of the power provided by the power grid, and then the amount of change in active power relative to the amount of change in voltage before and after the change in voltage. Based on the above, the amount of power generated by the distributed power source connected to the power grid is calculated. Specifically, the power generation amount calculation apparatus 100 changes the voltage of the power grid, and calculates the power generation amount by the distributed power source connected to the power grid based on the voltage before and after the change and the active power. More specifically, the power generation amount calculation apparatus 100 calculates the power generation amount by the distributed power source connected to the power network based on (Equation 2).

An example of a method in which the power generation amount calculation unit 123 calculates the power generation amount by the distributed power source will be described using the values shown in FIG. As shown in FIG. 4, hereinafter, the voltage “V ₁ ” before the change by the changing unit 121 is “189.19 V”, and the voltage “V ₂ ” after the change by the changing unit 121 is “192.3 V”. . Further, the effective power “P ₁ ” before the change by the changing unit 121 is set to “−1.84 kW”, and the effective power “P ₂ ” after the change by the changing unit 121 is set to “−0.958 kW”. The case where the condition “residential area” is input to the input unit 101 by the user will be described.

In this case, the power generation amount calculation unit 123 acquires the voltage characteristic index “2” by searching the voltage characteristic index table 111 with the condition “residential area”. Then, as shown in the following (Equation 8), the power generation amount calculation unit 123 substitutes “189.19V” for “V ₁ ” in (Equation 2), and “192.3V” for “V ₂ ”. Then, “−1.84 kW” is substituted for “P ₁ ”, “−0.958 kW” is substituted for “P ₂ ”, and “2” is substituted for “α”. As a result, the power generation amount calculation unit 123 calculates “28.5 kW” as the power generation amount by the distributed power source. As can be seen from FIG. 4, the actual power generation amount by solar power generation is “28.7 kW”, which indicates that the power generation amount by the distributed power source was calculated with high accuracy.

  Note that, when a specific value is designated by the user as the voltage characteristic index, the power generation amount calculation unit 123 calculates the power generation amount by the distributed power source using the specified value. In addition, when a condition is specified by the user, the power generation amount calculation unit 123 reads a voltage characteristic index that matches the specified condition from the voltage characteristic index table 111, and uses the read voltage characteristic index to perform a distributed type. Calculate the amount of power generated by the power supply. Further, when the voltage characteristic index is not specified by the user, the power generation amount calculation unit 123 uses “1” as the voltage characteristic index as shown in the condition “not specified” in FIG. Calculate the amount of power generated by.

  The power generation amount calculation apparatus 100 may be realized using an arbitrary division processing terminal such as a personal computer, a workstation, or a PDA (Personal Data Assistance). For example, it may be realized by mounting each function of the control unit 120 shown in FIG. 1 on an information processing apparatus such as a PDA.

[Processing by the power generation amount calculation apparatus according to the first embodiment]
FIG. 5 is a flowchart illustrating an example of processing performed by the power generation amount calculation apparatus according to the first embodiment. As shown in FIG. 5, the control unit 120 executes a series of processes described below at the calculation timing (Yes in step S <b> 101). Note that the calculation timing corresponds to, for example, a timing when an instruction to be calculated by the user is input to the input unit 101 or an arbitrary timing.

  That is, as shown in FIG. 5, when the calculation timing comes (Yes at Step S101), the measurement unit 122 measures the active power load and voltage before the change by the changing unit 121 (Step S102). For example, when the measurement unit 122 receives the measurement timing from the changing unit 121 at the calculation timing, the measuring unit 122 measures the active power load and the voltage before the voltage change. At this time, when the measuring unit 122 measures the active power load and the voltage, the measuring unit 122 transmits to the changing unit 121 that the active power has been measured.

  And the change part 121 changes the voltage of an electric power grid (step S103). For example, when the change unit 121 receives from the measurement unit 122 that the active power has been measured, the change unit 121 changes the voltage by switching the operation state of the adjustment device 200. At this time, when the voltage is changed, the changing unit 121 transmits to the changing unit 121 that the voltage has been changed.

  And the measurement part 122 measures the active power load and voltage after the change by the change part 121 (step S104). For example, when receiving the fact that the voltage has been changed, the measurement unit 122 measures the active power load and the voltage after the change of the voltage.

  Then, the power generation amount calculation unit 123 calculates the power generation amount of the distributed power source connected to the power network (step S105). For example, by obtaining the voltage characteristic index designated by the user from the voltage characteristic index table 111 and substituting the effective power and voltage measured by the measurement unit 122 into the above-described formula 2, the dispersion connected to the power network Calculate the power generation amount of the mold power source.

  And the electric power generation amount calculation part 123 outputs a calculation result from the output part 102 (step S106). For example, when the calculation result is “28.5 kW”, the power generation amount calculation unit 123 outputs “28.5 kW” as the power generation amount of the distributed power source connected to the power network.

  In addition, said process procedure is not limited to said order, You may change suitably in the range which does not contradict a process content. For example, the active power or voltage before the change may be measured regardless of whether the calculation timing is reached.

[Effects of power generation amount calculation apparatus according to Embodiment 1]
As described above, according to the first embodiment, the power generation amount calculation apparatus 100 changes the voltage of the power supplied to the power grid. Moreover, the power generation amount calculation apparatus 100 measures the active power of the power network whose voltage is changed. In addition, the power generation amount calculation apparatus 100 calculates the active power when the amount of change in active power measured with respect to the amount of change in voltage before and after the change is large as the amount of power generated by the distributed power source connected to the power grid. A small value is calculated as compared with the case where the amount of change is small. In addition, before and after the change, the power generation amount calculation apparatus 100 calculates a larger value when the change amount of the active power measured with respect to the change amount of the voltage is smaller than when the change amount of the active power is large. To do. As a result, it is possible to easily grasp the amount of power generated by the distributed power source connected to the power grid.

  That is, when a distributed power source is introduced, the apparent load (power consumption) seen by the power company is reduced according to the amount of power generated by the distributed power source, and the effective power of the power network changes. Here, for example, the apparent load of the general home “A” as seen from the power company is a combination of the amount of power generated by the distributed power source and the power consumed at home. When the voltage of the power supplied by the power company is changed, the amount of power generated by the distributed power source does not change much, while the power consumption consumed at home changes. Focusing on these points, adopting a configuration that changes the voltage of the power provided by the power grid, and then generating power from the distributed power source connected to the power grid based on the amount of change between the voltage and active power before and after the voltage change. Calculate the amount. As a result, the power company can easily grasp the amount of power generated by the distributed power source connected to the power network. For example, without providing a communication device for each distributed power source, the power generation amount of the distributed power source installed in each general household can be easily estimated as a total value using facilities of an electric power company.

  In addition, according to the first embodiment, the power generation amount calculation apparatus 100 uses the rated voltage based on the value obtained by multiplying the denominator by a predetermined voltage characteristic index with a value obtained by changing the voltage after the change with the rated voltage of the power grid as the denominator. Is the value obtained by subtracting the value obtained by multiplying the voltage characteristic index by the voltage characteristic index with the voltage before change as the denominator, and the numerator is the predetermined voltage with the voltage before change as the denominator. Measured before the change from the value multiplied by the characteristic index multiplied by the active power measured after the change to the value multiplied by the voltage characteristic index with the rated voltage as the denominator and the voltage after the change as the numerator. The power generation amount of the distributed power source is calculated by calculating a value that is a value obtained by subtracting the value obtained by multiplying the active power. As a result, the amount of power generated by the distributed power source can be calculated easily and with high accuracy.

  Further, according to the first embodiment, the power generation amount calculation apparatus 100 calculates the voltage characteristic index using 1 when no condition is specified by the user. In other words, in the case of an average power network, paying attention to the fact that the voltage characteristic index is “1” and calculating using 1 as the voltage characteristic index, the power generation amount by the distributed power source can be calculated easily and with high accuracy. It is.

  Further, according to the first embodiment, the power generation amount calculation device 100 changes the voltage by switching the operation state of the adjustment device 200 that adjusts the voltage of the power supplied to the power grid. Here, as a result of the adjustment device being generally provided in a substation or the like, the power generation amount calculation device 100 can easily calculate the power generation amount by the distributed power source using the existing facilities of the power company. It is.

  Although the embodiments of the present invention have been described so far, the present invention may be implemented in other embodiments besides the above-described embodiments. Therefore, other embodiments will be described below.

[Voltage before and after change]
For example, in the above-described embodiment, the case where the measurement unit 122 measures active power and voltage has been described. However, the present invention is not limited to this. For example, when the voltage before and after the change is known in advance, the measurement unit 122 does not need to measure the voltage while measuring the active power.

[System configuration]
In addition, among the processes described in the present embodiment, all or part of the processes described as being automatically performed can be performed manually, or the processes described as being performed manually can be performed. All or a part can be automatically performed by a known method. In addition, the processing procedures, control procedures, specific names, and information including various data and parameters shown in the above-mentioned documents and drawings (FIGS. 1 to 5, Equation 2, etc.), unless otherwise specified. It can be changed arbitrarily.

  Further, each component of each illustrated apparatus is functionally conceptual, and does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each device is not limited to that shown in the figure, and all or a part thereof may be functionally or physically distributed or arbitrarily distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured. For example, in the example illustrated in FIG. 1, the storage unit 110 may be connected as an external device of the power generation amount calculation device 100 via a network.

[program]
FIG. 6 is a diagram illustrating that the information processing by the power generation amount calculation program for executing a series of processes by the power generation amount calculation device is specifically realized using a computer. As illustrated in FIG. 6, the computer 3000 includes, for example, a memory 3010 and a CPU (Central Processing Unit) 3020. Each part of the computer 3000 is connected by a bus 3100.

  The memory 3010 includes a ROM 3011 and a RAM 3012 as illustrated in FIG. The ROM 3011 stores a boot program such as BIOS (Basic Input Output System).

  Here, as illustrated in FIG. 6, the hard disk drive 3080 stores, for example, an OS 3081, an application program 3082, a program module 3083, and program data 3084. That is, the power generation amount calculation program according to the disclosed technology is stored in, for example, the hard disk drive 3080 as the program module 3083 in which a command to be executed by the computer is described. Specifically, a program module describing each procedure for executing information processing similar to that performed by the changing unit 121, the measuring unit 122, and the power generation amount calculating unit 123 described in the above embodiment is stored in the hard disk drive 3080.

  Further, like data stored in the voltage characteristic index table 111 described in the above embodiment, data used for information processing by the power generation amount calculation program is stored as program data 3084 in, for example, the hard disk drive 3080. The CPU 3020 reads the program module 3083 and program data 3084 stored in the hard disk drive 3080 to the RAM 3012 as necessary, and executes various procedures.

  Note that the program module 3083 and the program data 3084 related to the power generation amount calculation program are not limited to being stored in the hard disk drive 3080. For example, the program module 3083 and the program data 3084 may be stored in a removable storage medium. In this case, the CPU 3020 reads data via a removable storage medium such as a disk drive. Similarly, the program module 3083 and program data 3084 related to the update program may be stored in another computer connected via a network (LAN (Local Area Network), WAN (Wide Area Network), etc.). . In this case, the CPU 3020 reads various data by accessing another computer via the network interface.

[Others]
The above-described power generation amount calculation program can be distributed via a network such as the Internet. The power generation amount calculation program can be executed by being recorded on a computer-readable recording medium such as a hard disk, a flexible disk (FD), a CD-ROM, an MO, and a DVD, and being read from the recording medium by the computer. .

DESCRIPTION OF SYMBOLS 100 Power generation amount calculation apparatus 101 Input part 102 Output part 110 Storage part 111 Voltage characteristic index table 120 Control part 121 Change part 122 Measurement part 123 Power generation amount calculation part 200 Adjustment apparatus 300 Sensor 401 Power plant 402,403 Substation 404-406 Load 411-413 Transmission line 414 Distribution line 501-504 Measurement point

Claims (5)

A changing unit for changing the voltage of the power supplied to the power grid;
A measuring unit for measuring the active power of the power grid whose voltage is changed by the changing unit;
From the value obtained by multiplying the denominator by a predetermined voltage characteristic index with a value obtained by using the rated voltage of the power grid as a denominator and the voltage after the change as a numerator, a value using the rated voltage as a denominator and the voltage before the change as the numerator The value obtained by subtracting the value multiplied by the characteristic index, and the numerator is the active power measured after the change to a value obtained by multiplying the rated voltage of the power network by the denominator and the value obtained by multiplying the voltage before the change by the predetermined voltage characteristic index A value obtained by subtracting a value obtained by multiplying a value obtained by multiplying the voltage characteristic index by the voltage characteristic index and a value obtained by multiplying the active power measured before the change by a value obtained by multiplying the value obtained by multiplying by the voltage characteristic index. by calculating the power generation amount calculating device that includes a power generation amount calculating unit which calculates a power generation amount of distributed power sources connected to the power network. The power generation amount calculation device according to claim 1 , wherein the power generation amount calculation unit uses 1 as the voltage characteristic index. The changing unit, by switching the operating state of the adjusting device for adjusting the voltage of the power supplied to the power grid, the power generation amount calculating device according to claim 1 or 2, characterized in that to change the voltage. A change procedure to change the voltage of the power supplied to the computer to the computer,
A measurement procedure for measuring the active power of the power grid whose voltage is changed by the change procedure;
From the value obtained by multiplying the denominator by a predetermined voltage characteristic index with a value obtained by using the rated voltage of the power grid as a denominator and the voltage after the change as a numerator, a value using the rated voltage as a denominator and the voltage before the change as the numerator The value obtained by subtracting the value multiplied by the characteristic index, and the numerator is the active power measured after the change to a value obtained by multiplying the rated voltage of the power network by the denominator and the value obtained by multiplying the voltage before the change by the predetermined voltage characteristic index A value obtained by subtracting a value obtained by multiplying a value obtained by multiplying the voltage characteristic index by the voltage characteristic index and a value obtained by multiplying the active power measured before the change by a value obtained by multiplying the value obtained by multiplying by the voltage characteristic index. by calculating the power generation amount calculating program for executing the power generation amount calculating step of calculating an amount of power generation by the connected distributed power source and the power network. A change step for changing the voltage of the power supplied to the power grid;
A measuring step of measuring the active power of the power grid whose voltage is changed by the changing step;
From the value obtained by multiplying the denominator by a predetermined voltage characteristic index with a value obtained by using the rated voltage of the power grid as a denominator and the voltage after the change as a numerator, a value using the rated voltage as a denominator and the voltage before the change as the numerator The value obtained by subtracting the value multiplied by the characteristic index, and the numerator is the active power measured after the change to a value obtained by multiplying the rated voltage of the power network by the denominator and the value obtained by multiplying the voltage before the change by the predetermined voltage characteristic index A value obtained by subtracting a value obtained by multiplying a value obtained by multiplying the voltage characteristic index by the voltage characteristic index and a value obtained by multiplying the active power measured before the change by a value obtained by multiplying the value obtained by multiplying by the voltage characteristic index. by calculating the power generation amount calculating method characterized by including a power generation amount calculating step of calculating a power generation amount of the connected distributed power source and the power network.

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