Power control system, power control method, and program

Abstract

To provide a power control system, a power control method, and a program capable of inhibiting frequency variation from being generated in a power system.SOLUTION: A power control system comprises: first acquisition means 41 for acquiring information on generated power generated at each of at least one power generation device for generating power using renewable energy; second acquisition means 42 for acquiring information on charge / discharge power to be charged and discharged at each of at least one power storage device for charging power generated at each of the at least one power generation device; and control means 44 for controlling a power generation amount of the at least one power generation device and / or a power charge / discharge amount of the at least one power storage device so that a value with respect to time variation in synthetic power including at least the generated power and the charge / discharge power is within a predetermined range.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a power control system, a power control method, and a program. [Background technology]

[0002] For example, power generation systems that utilize renewable energy such as solar power and wind power are known (for example, Patent Document 1).

[0003] The technology described in Patent Document 1 is configured to generate electricity by utilizing sunlight as renewable energy, and the DC power output of the solar cell is converted to AC by an inverter and connected to the power grid to supply power to a load. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 62-172293 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, it is known that the output of renewable energy in a power generation system fluctuates greatly depending on changes in the actual amount of sunlight, wind volume, and the like. If the output of renewable energy to a power grid exceeds the allowable fluctuation amount of the power grid, frequency fluctuations occur in the power grid, and there is a risk of power quality deteriorating. Therefore, in areas with small power grid capacity, such as remote islands, it may be specified that the fluctuation rate of the output of the power generation system be kept within a predetermined range in order to connect (interconnect) the power generation system to the power grid. In this case, if the number of times that the fluctuation rate of the output of the power generation system deviates from the predetermined range exceeds a specified number of times set by, for example, a power company, the power generation device and the power storage device are stopped. Therefore, there is a demand for a technology that can stably supply power by suppressing the occurrence of frequency fluctuations in the power grid.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a power control system, a power control method, and a program capable of suppressing frequency fluctuations in a power system. [Means for solving the problem]

[0007] In order to solve the above problems, firstly, the present invention provides a power control system comprising: a first acquisition means for acquiring information on generated power generated in each of at least one power generation device that generates power using renewable energy; a second acquisition means for acquiring information on charging / discharging power charged and discharged in each of at least one power storage device that charges the power generated in each of the at least one power generation device; and a control means for controlling the amount of power generated in the at least one power generation device and / or the amount of charging / discharging in the at least one power storage device so that a value related to the change over time of a composite power including at least the generated power and the charging / discharging power falls within a predetermined range.

[0008] According to this invention, the amount of power generated in at least one power generating device and / or the amount of charge / discharge in at least one power storage device are controlled so that the value relating to the time change of the composite power including at least the generated power and the charged / discharged power falls within a predetermined range, so that it is possible to prevent the rate of fluctuation of the composite power from deviating from the predetermined range, thereby making it possible to prevent frequency fluctuations from occurring in the power system.

[0009] Secondly, the present invention provides a power control method in which a computer executes each of the steps of acquiring information on generated power generated in each of at least one power generation device that generates power using renewable energy, acquiring information on charging / discharging power charged and discharged in each of at least one power storage device that charges the power generated in each of the at least one power generation device, and controlling the amount of power generated in the at least one power generation device and / or the amount of charging / discharging in the at least one power storage device so that a value related to the change over time of a composite power including at least the generated power and the charging / discharging power falls within a predetermined range.

[0010] Thirdly, the present invention provides a program for enabling a computer to realize the following functions: a function for acquiring information on generated power generated in each of at least one power generation device that generates power using renewable energy; a function for acquiring information on charging / discharging power charged and discharged in each of at least one power storage device that charges the power generated in each of the at least one power generation device; and a function for controlling the amount of power generated in the at least one power generation device and / or the amount of charging / discharging in the at least one power storage device so that a value related to the change over time of a composite power including at least the generated power and the charging / discharging power falls within a predetermined range. Effect of the Invention

[0011] According to the power control system, power control method, and program of the present invention, it is possible to suppress the occurrence of frequency fluctuations in a power system. [Brief description of the drawings]

[0012] [Figure 1] 1 is a diagram illustrating a basic configuration of a power control system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram showing a configuration of a control device. [Diagram 3] FIG. 2 is a functional block diagram for explaining functions that play a major role in the power control system. [Figure 4] FIG. 11 is a diagram showing an example of the configuration of first acquired data. [Diagram 5] FIG. 11 is a diagram showing an example of the configuration of second acquired data. [Figure 6] FIG. 11 is a diagram showing an example of the configuration of third obtained data. [Figure 7] FIG. 13 is a diagram illustrating an example of the configuration of composite power data. [Figure 8] 4 is a flowchart showing an example of main processing of a power control system according to an embodiment of the present invention. [Figure 9] 2 is a diagram showing an example of division of functions of a power control system among a power generation device, a power storage device, and a control device. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, this embodiment is merely an example, and the present invention is not limited thereto.

[0014] (1) Basic configuration of power control system Fig. 1 is a diagram showing a schematic basic configuration of a power control system according to an embodiment of the present invention. As shown in Fig. 1, the power control system 1 according to this embodiment is connected to a power grid 2, and includes a power generation device 10, a power storage device 20, a control device 30, a first measuring device MD1, a second measuring device MD2, a third measuring device MD3, a fourth measuring device MD4, an actinometer PM, and a load L. In Fig. 1, the solid lines between the devices indicate an example of a power line, and the dashed lines between the devices indicate an example of a signal line.

[0015] The power generation device 10 is configured to generate power using renewable energy, and in this embodiment, includes a solar cell module 11 including, for example, a solar panel, and a power conditioner (PCS) 12. The PCS 12 is configured to convert DC generated power output from the solar cell module 11 into AC generated power. In this embodiment, the amount of generated power output from the PCS 12 (which may be an instantaneous value or an integrated value) is controlled by a control device 30.

[0016] The first measuring device MD1 is configured to measure the power generated in the power generation device 10 (generated power) and transmit information related to the measured generated power (e.g., a generated power value, etc.) to the control device 30. Note that, although the first measuring device MD1 is shown in FIG. 1 as being provided separately from the power generation device 10, the first measuring device MD1 may be provided inside the power generation device 10.

[0017] The power storage device 20 is configured to be charged with the electric power (generated power) generated by the power generation device 10, and includes a storage battery (not shown) constituted by a secondary battery such as a lithium ion battery. In this embodiment, the amount of charging power (which may be an instantaneous value or an integrated value) charged to the power storage device 20 and the amount of discharging power (which may be an instantaneous value or an integrated value) discharged from the power storage device 20 are controlled by the control device 30.

[0018] The second measuring device MD2 is configured to measure the charging power charged to the power storage device 20 and the discharging power (charging / discharging power) discharged from the power storage device 20, and transmit information related to the measured charging / discharging power (e.g., charging / discharging power value, etc.) to the control device 30. Note that, although the second measuring device MD2 is shown in FIG. 1 as being provided separately from the power storage device 20, the second measuring device MD2 may be provided inside the power storage device 20.

[0019] The load L is configured to consume electric power supplied from the power generation device 10, the power storage device 20, or the power system 2.

[0020] The third measuring device MD3 is configured to measure the power (load power) supplied to the load L, and transmit to the control device 30 information relating to the measured load power (for example, a load power value).

[0021] In this embodiment, the fourth measuring device MD4 is configured to measure a composite power including the generated power generated in the power generation device 10, the charge / discharge power charged and discharged in the storage device 20, and the load power, and to transmit information regarding the measured composite power (e.g., a composite power value, etc.) to the control device 30.

[0022] In this embodiment, the actinometer PM is configured to measure the amount of solar radiation and transmit information about the measured amount of solar radiation to the control device 30.

[0023] The control device 30 is configured to communicate with each of the measuring devices MD1, MD2, MD3, MD4 and the actinometer PM, and to acquire information on the power measured by each of the measuring devices MD1, MD2, MD3, MD4 and information on the amount of solar radiation measured by the actinometer PM over time. The control device 30 is also configured to control the amount of power generated by the power generation device 10 (which may be an instantaneous value or an integrated value) and / or the amount of charge / discharge by the power storage device 20 (which may be an instantaneous value or an integrated value) so that the value related to the time change of the composite power falls within a predetermined range. Furthermore, the control device 30 may be configured to control the amount of power generated by the power generation device 10 based on the amount of solar radiation measured by the actinometer PM. Here, the control device 30 may be a terminal device operated by an individual user, such as a mobile terminal, a smartphone, a PDA, a personal computer, a television receiver with a two-way communication function (including a so-called multi-function smart TV), or a server computer.

[0024] In the power control system 1 according to this embodiment, the measuring devices MD1, MD2, MD3, the load L, and the actinometer PM are not necessarily essential components.

[0025] (2) Configuration of the control device The configuration of the control device 30 will be described with reference to Fig. 2. Fig. 2 is a block diagram showing the internal configuration of the control device 30. As shown in Fig. 2, the control device 30 includes a CPU (Central Processing Unit) 31, a ROM (Read Only Memory) 32, a RAM (Random Access Memory) 33, a storage device 34, a display processing unit 35, a display unit 36, an input unit 37, and a communication interface unit 38, and is provided with a bus 30a for transmitting control signals or data signals between the units. Note that, in the control device 30, the display processing unit 35, the display unit 36, and the input unit 37 are not necessarily essential components, but are components for making the present invention more preferable.

[0026] When power is applied to the control device 30, the CPU 31 loads various programs stored in the ROM 32 or the storage device 34 into the RAM 33 and executes them. In this embodiment, the CPU 31 reads out and executes the programs stored in the ROM 32 or the storage device 34, thereby realizing the functions of a first acquisition means 41, a second acquisition means 42, a third acquisition means 43, and a control means 44 (shown in FIG. 3) described below.

[0027] The storage device 34 may be a non-volatile storage device such as a flash memory, an SSD (Solid State Drive), a magnetic storage device (e.g., an HDD (Hard Disk Drive), a floppy disk (registered trademark), a magnetic tape, etc.), an optical disk, or a volatile storage device such as a RAM, and stores the programs executed by the CPU 31 and the data referenced by the CPU 31. The storage device 34 also stores first acquired data (shown in FIG. 4), second acquired data (shown in FIG. 5), third acquired data (shown in FIG. 6), and composite power data (shown in FIG. 7), which will be described later.

[0028] The display processing unit 35 displays the display data provided from the CPU 31 on the display unit 36. The display unit 36 ​​is, for example, an LCD (Liquid Crystal Display) monitor including thin film transistors arranged in a matrix on a pixel basis, and displays the data to be displayed on the display screen by driving the thin film transistors based on the display data.

[0029] When the control device 30 is a button input type device, the input unit 37 includes a button group including a plurality of instruction input buttons such as a direction button and a decision button for accepting user operation input, and a button group including a plurality of instruction input buttons such as a numeric keypad, and includes an interface circuit for recognizing the press (operation) input of each button and outputting it to the CPU 31.

[0030] When the control device 30 is a device that uses a touch panel input method, the input unit 37 mainly accepts inputs of the touch panel method by touching the display screen with a fingertip or a pen. The touch panel input method may be a known method such as a capacitance method.

[0031] Furthermore, in the case where the control device 30 is a device capable of receiving voice input, the input unit 37 may be configured to include a microphone for voice input, or may be provided with an interface circuit for outputting voice data input via an external microphone to the CPU 31. Furthermore, in the case where the control device 30 is a device capable of receiving moving images and / or still images, the input unit 37 may be configured to include a digital camera or digital video camera for image input, or may be provided with an interface circuit for receiving image data captured by an external digital camera or digital video camera and outputting it to the CPU 31.

[0032] The communication interface unit 38 includes an interface circuit for communicating with other devices (for example, the power generation device 10, the power storage device 20, the measurement devices MD1, MD2, MD3, MD4, the actinometer PM, etc.).

[0033] (3) Overview of each function in the power control system The functions realized by the power control system of this embodiment will be described with reference to Fig. 3. Fig. 3 is a functional block diagram for explaining the functions that play a major role in the power control system of this embodiment. In the functional block diagram of Fig. 3, a first acquisition means 41, a second acquisition means 42, and a control means 44 correspond to the main components of the power control system of the present invention. The other means (third acquisition means 43) is not necessarily an essential component, but is a component that makes the present invention even more preferable.

[0034] The first acquisition means 41 has a function of acquiring information on the generated power generated in each of at least one power generation device 10 that generates power by utilizing renewable energy.

[0035] The first acquisition means 41 may acquire information related to the generated power measured by the first measuring device MD1. This makes it possible to perform control using the information related to the generated power measured by the first measuring device MD1 (for example, the generated power value).

[0036] The function of the first acquisition means 41 is realized, for example, as follows. First, the first measurement device MD1 measures the value of the power (generated power (which may be expressed as a positive value, for example)) generated in the power generation device 10 every time a predetermined time (for example, one minute) elapses, and transmits the measured value of the generated power to the control device 30. Here, the measured value of the generated power may be transmitted to the control device 30 in a state in which it is associated with the date and time when the measurement was performed by the first measurement device MD1 (measurement date and time). The first measurement device MD1 may also transmit to the control device 30 an average value of the generated power measured within a predetermined time (for example, one minute). Furthermore, in a case where a plurality of power generation devices 10 are provided and the first measurement device MD1 is provided for each of the plurality of power generation devices 10, the first measurement device MD1 may transmit to the control device 30 the measured value of the generated power in a state in which it is associated with the measurement date and time and identification information (for example, the serial number of the power generation device 10) of the power generation device 10 corresponding to the first measurement device MD1 (the power generation device 10 in which the first measurement device MD1 is provided). Furthermore, one first measuring device MD1 may measure the generated power of each of the multiple power generating devices 10.

[0037] Meanwhile, every time the CPU 31 of the control device 30 receives (acquires) a generated power value transmitted from the first measuring device MD1 via the communication interface unit 38, the CPU 31 stores the received generated power value in the first acquisition data shown in Fig. 4 in association with the measurement date and time. The first acquisition data is data in which the generated power value (generated power value) is described in association with each measurement date and time. In this way, the first acquisition means 41 can acquire information (generated power value) related to the generated power measured by the first measuring device MD1.

[0038] In addition, when multiple power generation devices 10 are provided, individual first acquisition data may be provided for each of the multiple power generation devices 10, or a single first acquisition data may be stored in a state in which the generated power value and the identification information of the power generation device 10 that generated the power are associated with each other for each measurement date and time.

[0039] The second acquisition means 42 has a function of acquiring information on charge / discharge power that is charged and discharged in each of at least one power storage device 20 that is charged with power generated in each of at least one power generation device 10. The number of power generation devices 10 may be the same as the number of power storage devices 20, or may be different.

[0040] The second acquisition means 42 may acquire information related to charge / discharge power measured by the second measuring device MD2. This makes it possible to perform control using the information related to charge / discharge power measured by the second measuring device MD2 (e.g., charge / discharge power value).

[0041] The function of the second acquisition means 42 is realized, for example, as follows. First, the second measurement device MD2 measures the value of the power charged to the power storage device 20 (charging power (for example, it may be indicated by a positive value when the power storage device 20 charges, and may be indicated by a negative value when the power storage device 20 discharges)) or the power discharged from the power storage device 20 (discharging power (for example, it may be indicated by a negative value when the power storage device 20 charges, and may be indicated by a positive value when the power storage device 20 discharges)) every time a predetermined time (for example, one minute) has elapsed, and transmits the measured value of the charging / discharging power (the value of the charging power or the discharging power) to the control device 30. Here, the measured value of the charging / discharging power may be transmitted to the control device 30 in a state associated with the date and time when the measurement was performed by the second measurement device MD2 (measurement date and time). In addition, the second measurement device MD2 may transmit the average value of the charging / discharging power measured within the predetermined time (for example, one minute) to the control device 30. Furthermore, in a case where a plurality of power storage devices 20 are provided and a second measuring device MD2 is provided for each of the plurality of power storage devices 20, the second measuring device MD2 may transmit the measured value of charge / discharge power to the control device 30 in a state in which the value is associated with the measurement date and time and identification information (e.g., the serial number of the power storage device 20) of the power storage device 20 corresponding to the second measuring device MD2 (the power storage device 20 in which the second measuring device MD2 is provided). Furthermore, one second measuring device MD2 may measure the charge / discharge power of each of the plurality of power storage devices 20.

[0042] Meanwhile, every time the CPU 31 of the control device 30 receives (acquires) a value of charge / discharge power transmitted from the second measuring device MD2 via the communication interface unit 38, the CPU 31 stores the received value of charge / discharge power in the second acquisition data shown in Fig. 5 in association with the measurement date and time. The second acquisition data is data in which the value of charge / discharge power (charge / discharge power value) is described in association with each measurement date and time. In this way, the second acquisition means 42 can acquire information related to the charge / discharge power measured by the second measuring device MD2 (charge / discharge power value).

[0043] In addition, when multiple energy storage devices 20 are provided, separate second acquired data may be provided for each of the multiple energy storage devices 20, or a single second acquired data may be stored in a state in which the generated power value and the identification information of the charged / discharged energy storage device 20 are associated with each other for each measurement date and time.

[0044] The third acquisition means 43 has a function of acquiring information on the load power when the load power, which is the power supplied to the load L, is included in the composite power.

[0045] Furthermore, the third acquisition means 43 may acquire information related to the load power measured by the third measurement device MD3. This makes it possible to perform control using the information related to the load power measured by the third measurement device MD3 (for example, a load power value).

[0046] The function of the third acquisition means 43 is realized, for example, as follows. First, when power is supplied to the load L, the third measurement device MD3 measures the value of the power (load power (for example, it may be indicated as a positive value, and when 10 kW of power is supplied to the load L, the load power is indicated as 10 kW)) supplied to the load L, and transmits the measured value of the load power to the control device 30. Here, the measured value of the load power may be transmitted to the control device 30 in a state associated with the date and time when the measurement was performed by the third measurement device MD3 (measurement date and time, i.e., the date and time when power was supplied to the load L).

[0047] Meanwhile, every time the CPU 31 of the control device 30 receives (acquires) a load power value transmitted from the third measuring device MD3 via the communication interface unit 38, the CPU 31 stores the received load power value in the third acquisition data shown in Fig. 6 in association with the measurement date and time. The third acquisition data is data in which the load power value (load power value) is described in association with each measurement date and time. In this way, the third acquisition means 43 can acquire information (load power value) related to the load power measured by the third measuring device MD3.

[0048] The control means 44 has a function of controlling the amount of power generated in at least one power generation device 10 and / or the amount of charge / discharge in at least one power storage device 20 so that a value relating to the time change of a composite power including at least the generated power and the charged / discharged power falls within a predetermined range.

[0049] Furthermore, when it is determined that the value relating to the time change of the combined power does not fall within the predetermined range only by controlling the charge / discharge amount in the at least one power storage device 20, the control means 44 may control the amount of power generated in the at least one power generation device 10. As a result, when the value relating to the time change of the combined power can be brought within the predetermined range only by controlling the charge / discharge amount in the at least one power storage device 20, it becomes unnecessary to control the amount of power generated in the at least one power generation device 10, and therefore it becomes possible to generate power while maintaining the rated output of the generated power in the at least one power generation device 10.

[0050] Here, when the control means 44 controls not only the charge / discharge amount in at least one power storage device 20 but also the power generation amount in at least one power generation device 10, the control interval of the power generation amount by the control means 44 may be equal to or longer than the control interval of the charge / discharge amount by the control means 44. In this case, it becomes possible to reduce the number of times that the power generation amount is controlled in at least one power generation device 10, compared with the number of times that the charge / discharge amount is controlled in at least one power storage device 20. As a result, for example, when the response performance of the power storage device 20 is better than that of the power generation device 10, it becomes possible to control the combined power so that the time change is small by frequently controlling the charge / discharge amount in the power storage device 20.

[0051] Furthermore, the control means 44 may control the amount of power generated in at least one power generation device 10 to be reduced as the number of times that the value relating to the time change of the composite power deviates outside the predetermined range increases within a predetermined period (e.g., one hour, one day, 30 days, etc.). In this case, by controlling to reduce the amount of power generated, it becomes possible to suppress the value relating to the time change of the composite power from deviating outside the predetermined range after the control.

[0052] Furthermore, the control means 44 may control the charge / discharge amount of at least one power storage device 20 based on the remaining amount of electricity stored and / or the amount of electricity stored before control in at least one power storage device 20. This makes it possible to prevent at least one power storage device 20 from being unable to charge due to the remaining amount of electricity stored and / or the amount of electricity stored before control in at least one power storage device 20 exceeding a predetermined allowable value, for example.

[0053] Here, the control means 44 may perform control so that the discharge amount of the at least one power storage device 20 increases as the remaining amount of stored power in the at least one power storage device 20 increases and / or the charge amount before the control increases. This makes it possible to operate the at least one power storage device 20 for a longer period while keeping the value relating to the time change of the combined power within a predetermined range.

[0054] Furthermore, the control means 44 may control the at least one power storage device 20 so that the charge amount increases as the remaining amount of stored power in the at least one power storage device 20 decreases and / or the discharge amount before the control increases. This makes it possible to operate the at least one power storage device 20 for a longer period while keeping the value relating to the time change of the combined power within a predetermined range.

[0055] The function of the control means 44 is realized, for example, as follows. First, the fourth measurement device MD4 measures the value of the power generated in the power generation device 10 (generated power), the value of the power charged and discharged in the power storage device 20 (charge and discharge power), and the value of the load power every time a predetermined time (for example, one minute) elapses, and transmits a value of a composite power including the measured power values ​​to the control device 30. Here, the value of the composite power can be calculated by using the following formula (1). Combined power (kW) = generated power (kW) + charging / discharging power (kW) - load power (kW) = Generated power (kW) - Charging power (kW) - Load power (kW) = Generated power (kW) + Discharged power (kW) - Load power (kW)…(1) For example, when the value of the generated power is 20 kW, the value of the charge / discharge power is 30 kW (the value of the charge / discharge power is a positive value when the power storage device 20 discharges, and here indicates that the power storage device 20 is discharging 30 kW. In this case, the charge power is indicated as -30 kW, and the discharge power is indicated as +30 kW), and the value of the load power is 10 kW, the value of the composite power is 20 (kW) - (-30 kW) - 10 kW = 20 (kW) + (+30 kW) - 10 kW = 40 kW. Furthermore, the timing at which the measurement is performed by the fourth measuring device MD4 may be synchronized with the timing at which the measurement is performed by any one of the first measuring device MD1, the second measuring device MD2, and the third measuring device MD3. Furthermore, the measured value of the composite power may be transmitted to the control device 30 in a state associated with the date and time at which the measurement was performed by the fourth measuring device MD4 (measurement date and time).

[0056] Meanwhile, every time the CPU 31 of the control device 30 receives (acquires) the composite power value transmitted from the fourth measuring device MD4 via the communication interface unit 38, it stores the received composite power value in the composite power data shown in FIG. 7, for example, in a state in which the received composite power value is associated with the measurement date and time and the rate of change (fluctuation rate) of the composite power value. The composite power data is data in which the composite power value (composite power value) and the rate of change from the composite power value at the immediately previous measurement date and time are described in a state in which they are associated with each other for each measurement date and time. Here, the composite power value received (acquired) at measurement date and time t is stored as CP t The composite power value received (acquired) at the previous measurement date and time t-1 is taken as CP t-1 and the sum of the rated outputs of at least one power generating device 10 is P, the rate of change RC of the composite power value can be calculated by using the following formula (2). RC(%)=(CP t -CP t-1 ) / P / (t-(t-1))×100 …(2)

[0057] Next, the CPU 31 determines whether the calculated change rate RC of the composite power value is within a predetermined range of a change rate (fluctuation rate) determined by, for example, a power company (for example, the absolute value of the change rate determined by the power company is multiplied by RC spec In this case, -RC spec ≦RC≦RC specThe CPU 31 may determine whether the change rate RC of the composite power value is within a predetermined range or not. In addition, the CPU 31 may control the amount of power generated in at least one power generating device 10 and / or the amount of charge / discharge in at least one power storage device 20, for example, based on a difference (size comparison) between the current value of the composite power and the target value of the composite power, regardless of whether the change rate RC of the composite power value is within a predetermined range or not. Here, for example, when the current value of the composite power is greater than the target value of the composite power, the amount of power generated in at least one power generating device 10 and / or the amount of charge / discharge in at least one power storage device 20 may be controlled so that the current value of the composite power falls to the target value of the composite power, or, for example, when the current value of the composite power is smaller than the target value of the composite power, the amount of power generated in at least one power generating device 10 and / or the amount of charge / discharge in at least one power storage device 20 may be controlled so that the current value of the composite power rises to the target value of the composite power. In addition, the difference (size comparison) between the current value of the composite power and the target value of the composite power may be determined at a predetermined interval (for example, 0.5 seconds). Furthermore, the target value of the composite power may be calculated, for example, by substituting the charge / discharge power or the remaining amount of storage of at least one power storage device 20 into a predetermined calculation formula. Furthermore, the target value of the composite power may be set so that the change rate (fluctuation rate) of the target value is within a predetermined range of the change rate (fluctuation rate) set by, for example, a power company. The target value of the composite power may be adjusted as appropriate. For example, the target value of the composite power may be adjusted to be increased when the remaining amount of storage in at least one power storage device 20 is greater than an upper threshold, or may be adjusted to be decreased when the remaining amount of storage in at least one power storage device 20 is less than a lower threshold, or may be adjusted to be increased when the charging power of at least one power storage device 20 is greater than a predetermined threshold, or may be adjusted to be decreased when the discharging power of at least one power storage device 20 is less than a predetermined threshold, or may be adjusted to be increased when the current value of the composite power is less than a predetermined threshold. The timing for determining the change rate RC of the composite power value may be synchronized with the timing for controlling the amount of power generation in at least one power generation device 10 and / or the amount of charge / discharge in at least one power storage device 20, or may not be synchronized with the timing for controlling the amount of power generation in at least one power storage device 20.

[0058] Furthermore, the CPU 31 may increment a predetermined count value by one each time it is determined that the change rate RC of the composite power value deviates from a predetermined range, and may control the amount of power generated in the at least one power generation device 10 and / or the amount of charge / discharge in the at least one power storage device 20, for example, based on a difference (larger or smaller) between a current value of the composite power and a target value of the composite power. Furthermore, when the count value reaches a predetermined value determined by, for example, a power company, the CPU 31 may control the at least one power generation device 10 and the at least one power storage device 20 to stop operation by transmitting a control signal for stopping the operation to each of the at least one power generation device 10 and the at least one power storage device 20.

[0059] In this embodiment, when controlling the amount of power generated in at least one power generating device 10 and / or the amount of charge / discharge in at least one power storage device 20 based on, for example, a difference (size comparison) between a current value of the composite power and a target value of the composite power, the CPU 31 first controls the amount of charge / discharge in at least one power storage device 20. Here, the CPU 31 may control the amount of charge / discharge in at least one power storage device 20 based on the remaining amount of power stored in at least one power storage device 20 and / or the amount of charge / discharge before control. In this case, each of the at least one power storage devices 20 may transmit information about its remaining amount of power stored to the control device 30 in response to, for example, receiving a request signal from the CPU 31. Furthermore, when the CPU 31 receives information about the remaining amount of power stored in each of the at least one power storage devices 20 via the communication interface unit 38, the CPU 31 controls the amount of charge / discharge in at least one power storage device 20 based on the received information about the remaining amount of power stored and / or the information about the charge / discharge power acquired based on the function of the second acquisition means 42.

[0060] Here, the CPU 31 may calculate the discharge amount of at least one power storage device 20 using a calculation formula configured such that the discharge amount of at least one power storage device 20 increases as the remaining amount of power storage and / or the charge amount before the control in at least one power storage device 20 increases. In addition, for example, when information recording the remaining amount of power storage and / or the charge before the control and the discharge amount corresponding to the remaining amount of power storage and / or the charge amount before the control is stored in, for example, the storage device 34, the CPU 31 may access the information and extract the discharge amount corresponding to the remaining amount of power storage and / or the charge amount before the control. Then, the CPU 31 may transmit information on the calculated or extracted discharge amount to the at least one power storage device 20. Meanwhile, the at least one power storage device 20 may adjust its own discharge amount based on the received information on the discharge amount.

[0061] Furthermore, the CPU 31 may calculate the charge amount in at least one power storage device 20 using a calculation formula configured such that the charge amount in at least one power storage device 20 increases as the remaining amount of power storage in at least one power storage device 20 decreases and / or the discharge amount before control increases. Furthermore, for example, when information in which the remaining amount of power storage and / or the discharge amount before control and the charge amount corresponding to the remaining amount of power storage and / or the discharge amount before control are recorded is stored in, for example, the storage device 34, the CPU 31 may access the information and extract the charge amount corresponding to the remaining amount of power storage and / or the discharge amount before control. Then, the CPU 31 may transmit information on the calculated or extracted charge amount to the at least one power storage device 20. Meanwhile, the at least one power storage device 20 may adjust its own charge amount based on the received information on the charge amount.

[0062] In addition, when the CPU 31 determines that the change rate of the composite power after the charge / discharge amount of at least one power storage device 20 is controlled does not fall within a predetermined range, the CPU 31 may control the at least one power generation device 10 to reduce the amount of power generation. In addition, the CPU 31 may access the composite power data and measure (count) the number of times that the change rate RC of the composite power value deviates from the predetermined range within a predetermined period (for example, one hour, one day, 30 days, etc.). The CPU 31 may calculate the amount of power generation in at least one power generation device 10 using a calculation formula configured so that the more times the change rate RC of the composite power value deviates from the predetermined range, the smaller the amount of power generation in at least one power generation device 10 becomes. In addition, for example, when information recording the number of times that the change rate RC of the composite power value deviates from the predetermined range (the number of deviations) and the amount of power generation corresponding to the number of times is stored in the storage device 34, the CPU 31 may access the information and extract the amount of power generation corresponding to the number of deviations measured (counted). In addition, the CPU 31 may transmit information regarding the calculated or extracted amount of power generation to at least one power generation device 10. Meanwhile, at least one power generation device 10 may adjust its own power generation amount based on the received information on the power generation amount.

[0063] Furthermore, when controlling the amount of power generation in at least one power generation device 10, the CPU 31 may control the amount of power generation based on the amount of solar radiation measured by the actinometer PM. Here, the CPU 31 may control the amount of power generation in at least one power generation device 10 to be greater as the amount of solar radiation increases. In this case, the CPU 31 may calculate the amount of power generation in at least one power generation device 10 using a calculation formula configured such that the amount of power generation in at least one power generation device 10 increases as the amount of solar radiation increases. Furthermore, for example, when information recording the amount of solar radiation and the amount of power generation corresponding to the amount of solar radiation is stored in, for example, the storage device 34, the CPU 31 may access the information and extract the amount of power generation corresponding to the measured amount of solar radiation.

[0064] Furthermore, when the CPU 31 controls the amount of power generation in at least one power generation device 10, the control interval of the amount of power generation by the CPU 31 may be set to be equal to or greater than the control interval of the charge / discharge amount by the CPU 31 (for example, an integral multiple or greater).

[0065] In this way, the control means 44 can control the amount of power generated in at least one power generation device 10 and / or the amount of charge / discharge in at least one power storage device 20 so that the value relating to the time change of the composite power, which includes at least the generated power and the charged / discharged power, falls within a predetermined range.

[0066] The CPU 31 may present information on the controlled amount of power generation and / or the amount of charge / discharge. For example, when the CPU 31 controls the amount of power generation and / or the amount of charge / discharge based on the function of the control means 44, the CPU 31 may display information on the controlled amount of power generation and / or the amount of charge / discharge on, for example, the display unit 36. Here, the information on the amount of power generation and / or the amount of charge / discharge may be composed of text data or image data. In addition, when the information on the amount of power generation and / or the amount of charge / discharge is composed of audio data, the CPU 31 may output the information on the amount of power generation and / or the amount of charge / discharge from an audio output device such as a speaker. Furthermore, the CPU 31 may transmit the information on the amount of power generation and / or the amount of charge / discharge to another computer (for example, a server) connected to the control device 30 via a communication network such as the Internet or a LAN.

[0067] (4) Flow of main processing of the power control system of this embodiment Next, an example of the flow of main processes performed by the power control system of this embodiment will be described with reference to the flowchart of FIG.

[0068] First, the CPU 31 of the control device 30 acquires information on the generated power generated in at least one power generation device 10 that generates power using renewable energy based on the function of the first acquisition means 41 (step S100). Here, the CPU 31 may acquire information on the generated power measured by the first measurement device MD1.

[0069] Next, the CPU 31 of the control device 30 acquires information on the charging and discharging power charged and discharged in each of the at least one power storage device 20 that is charged with the power generated in each of the at least one power generation device 10, based on the function of the second acquisition means 42 (step S102). Here, the CPU 31 may acquire information on the charging and discharging power measured by the second measurement device MD2.

[0070] Furthermore, the CPU 31 of the control device 30 may acquire information on the load power, which is the power supplied to the load L, based on the function of the third acquisition means 43. Here, the CPU 31 may acquire information on the load power measured by the third measurement device MD3.

[0071] Next, based on the function of the control means 44, the CPU 31 of the control device 30 controls the amount of power generated in at least one power generation device 10 and / or the amount of charge / discharge in the at least one power storage device 20 so that the value relating to the time change of the composite power including at least the generated power and the charged / discharged power falls within a predetermined range (step S104).

[0072] Here, when it is determined that the value relating to the time change of the composite power does not fall within the predetermined range only by controlling the charge / discharge amount in the at least one power storage device 20, the CPU 31 may control the amount of power generated in the at least one power generation device 10. Furthermore, the CPU 31 may control the amount of power generated in the at least one power generation device 10 to be smaller as the number of times that the value relating to the time change of the composite power deviates from the predetermined range within a predetermined period (e.g., one hour, one day, 30 days, etc.) increases. Furthermore, the CPU 31 may control the amount of charge / discharge in the at least one power storage device 20 based on the remaining amount of stored power in the at least one power storage device 20 and / or the amount of charge / discharge before control.

[0073] After step S104, the CPU 31 of the control device 30 may display information related to the controlled amount of power generation and / or the amount of charge / discharge on, for example, the display unit 36. The CPU 31 of the control device 30 may also transmit information related to the controlled amount of power generation and / or the amount of charge / discharge to another computer (for example, a server, etc.) via a communication network such as the Internet or a LAN.

[0074] As described above, according to the power control system, power control method, and program of the present embodiment, the amount of power generated in at least one power generation device 10 and / or the amount of charge / discharge in at least one power storage device 20 are controlled so that the value relating to the time change of the composite power including at least the generated power and the charged / discharged power falls within a predetermined range, making it possible to prevent the rate of fluctuation of the composite power from deviating from the predetermined range. This makes it possible to prevent frequency fluctuations from occurring in the power system.

[0075] The program of the present invention may be stored in a computer-readable storage medium. The storage medium on which the program is recorded may be the ROM 32, RAM 33, or storage device 34 of the control device 30 shown in Fig. 2. The storage medium may be a CD-ROM or the like that can be read by being inserted into a program reading device such as a CD-ROM drive. Furthermore, the storage medium may be a magnetic tape, a cassette tape, a flexible disk, an MO / MD / DVD, or a semiconductor memory.

[0076] The above-described embodiments are described for the purpose of facilitating understanding of the present invention, and are not described for the purpose of limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design modifications and equivalents that fall within the technical scope of the present invention.

[0077] For example, in the above-described embodiment, the case where sunlight is used as a renewable energy source has been described as an example, but the present invention is not limited to this case. For example, even when wind power, hydraulic power, geothermal power, biomass, etc. are used as a renewable energy source, it is possible to obtain the same effects as those of the above-described embodiment.

[0078] In the above embodiment, the control means 44 is configured to control the amount of power generated in at least one power generation device 10 when it is determined that the value related to the time change of the composite power does not fall within a predetermined range only by controlling the amount of charge and discharge in at least one power storage device 20. However, the present invention is not limited to this case. For example, the control means 44 may control the amount of charge and discharge in at least one power storage device 20 when it is determined that the value related to the time change of the composite power does not fall within a predetermined range only by controlling the amount of power generated in at least one power storage device 10. In this case, the control interval of the amount of charge and discharge by the control means 44 may be equal to or longer than the control interval of the amount of power generated by the control means 44. The control means 44 may simultaneously control the amount of power generated in at least one power generation device 10 and the amount of charge and discharge in at least one power storage device 20.

[0079] Furthermore, in the above embodiment, the case where one control device 30 is provided has been described as an example, but the present invention is not limited to this case. For example, multiple control devices 30 may be provided, and in this case, the operation contents and processing results of any one of the control devices 30 may be presented in real time on the other control devices 30, and the processing results of any one of the control devices 30 may be shared among the multiple control devices 30.

[0080] Furthermore, in the above-mentioned embodiment, the control device 30 is configured to realize the functions of the first acquisition means 41, the second acquisition means 42, the third acquisition means 43, and the control means 44, but this is not limited to the configuration. For example, a computer or the like (for example, a general-purpose personal computer or a server computer) communicably connected to the control device 30 via a communication network such as the Internet or a LAN may be provided in each of the power generation device 10 and the power storage device 20. In this case, each of the power generation device 10, the power storage device 20, and the control device 30 may include substantially the same hardware configuration, so that the function of at least one of the means 41 to 44 described in the above-mentioned embodiment can be realized by the power generation device 10 or the power storage device 20. For example, the functions of the functional block diagram shown in FIG. 3 may be arbitrarily shared among the power generation device 10, the power storage device 20, and the control device 30 as shown in FIGS. 9(a) and 9(b).

[0081] Furthermore, the function of at least one of the above-mentioned means 41 to 44 may be realized by any one of the measuring devices MD1, MD2, MD3, and MD4. [Explanation of symbols]

[0082] 1. Power control system 10...Power generation equipment 20...Electricity storage device 30...Control device 41…First acquisition means 42…Second acquisition means 43…Third acquisition means 44...Control means MD1: First measuring device MD2: Second measurement device MD3: Third measurement device MD4: Fourth measuring device PM…Pyranometer

Claims

1. A first acquisition means for acquiring information regarding power generated in at least one power generation device that generates power by utilizing renewable energy; a second acquisition means for acquiring information on charge / discharge power that is charged and discharged in each of at least one power storage device that is charged with power generated in each of the at least one power generation device; and a control means for controlling the amount of power generated in the at least one power generation device and / or the amount of charge / discharge in the at least one power storage device so that a value relating to a time change in a composite power including at least the generated power and the charged / discharged power falls within a predetermined range. Power control system.

2. The first acquisition means acquires information about the generated power measured by a first measurement device. The power control system of claim 1 .

3. the second acquisition means acquires information about the charge / discharge power measured by a second measurement device; The power control system of claim 1 .

4. a third acquisition means for acquiring information about a load power, which is power supplied to a load, when the load power is included in the composite power; The power control system of claim 1 .

5. the third acquisition means acquires information about the load power measured by a third measurement device. The power control system of claim 4.

6. when it is determined that a value relating to a time change of the composite power does not fall within a predetermined range by only controlling the charge / discharge amount of the at least one power storage device, the control means controls an amount of power generation of the at least one power generation device. The power control system of claim 1 .

7. The control interval of the power generation amount by the control means is equal to or longer than the control interval of the charge / discharge amount by the control means. The power control system of claim 6.

8. the control means controls the amount of power generated by the at least one power generation device to be reduced as the number of times that the value relating to the time change of the composite power deviates outside the predetermined range within a predetermined period increases. The power control system of claim 1 .

9. the control means controls the charge / discharge amount of the at least one power storage device based on a remaining amount of power stored in the at least one power storage device and / or a charge / discharge amount before control; The power control system of claim 1 .

10. the control means controls the at least one power storage device so that the discharge amount of the at least one power storage device increases as the remaining amount of stored electricity in the at least one power storage device increases and / or as the charged amount before the control increases.

10. The power control system of claim 9.

11. the control means controls the at least one power storage device so that the charge amount of the at least one power storage device becomes larger as the remaining charge amount of the at least one power storage device becomes smaller and / or the discharge amount before the control becomes larger.

10. The power control system of claim 9.

12. The computer acquiring information about power generated in at least one power generation device that generates power by utilizing renewable energy; acquiring information on charge / discharge power that is charged and discharged in each of at least one power storage device that is charged with power generated in each of the at least one power generation device; controlling an amount of power generated in the at least one power generation device and / or an amount of charge / discharge in the at least one power storage device so that a value relating to a time change in a composite power including at least the generated power and the charged / discharged power falls within a predetermined range; The power control method includes the steps of:

13. On the computer, A function of acquiring information regarding power generated in at least one power generation device that generates power by utilizing renewable energy; a function of acquiring information on charge / discharge power that is charged and discharged in each of at least one power storage device that is charged with power generated in each of the at least one power generation device; a function of controlling the amount of power generated in the at least one power generation device and / or the amount of charge / discharge in the at least one power storage device so that a value relating to a time change in a composite power including at least the generated power and the charged / discharged power falls within a predetermined range; A program to achieve this.

Images