Power generation management system

Abstract

The present invention provides a power generation management system that can determine the output variation range that allows the amount of energy consumed by the power generation equipment to be appropriately controlled. [Solution] In a power generation management system, when the management device 30 transmits an output control command in the command transmission process to change the total output power of a plurality of power generation devices 10 by a predetermined overall output change range, before the command transmission process, it performs an allocation process to allocate the overall output change range as an individual output change range to at least one of the plurality of power generation devices 10, and in the allocation process, it refers to the total amount of energy consumed by each of the plurality of power generation devices 10 when each of the plurality of power generation devices 10 is operated for a predetermined period of time with the output power after each allocation process, and determines the individual output change range to be allocated to the plurality of power generation devices 10.

Description

Technical Field

[0001] The present invention relates to a power generation management system.

Background Art

[0002] In a power system, not only large-scale power plants that have conventionally existed but also power supply devices such as power generation devices and charge / discharge devices installed in facilities such as houses and offices are connected. In addition, power load devices installed in facilities are also connected to the power system. And by increasing or decreasing the received power at the receiving point of the facility using the power supply device and the power load device, it is possible to contribute to adjusting the power supply-demand balance in the power system. In recent years, under the concept of a virtual power plant (VPP: Virtual Power Plant), by controlling the operation of customer-side energy resources such as the above-mentioned power supply devices and power load devices installed in the facilities of customers, attempts have been made to provide the same functions as a power plant. Note that in the case of the received power at the receiving point of a facility, both the received power from the power system to the facility and the reverse power flow from the facility to the power system are included.

[0003] Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2018-125907) describes a power supply management system including a power supply device (power resource 101) installed in each of a plurality of facilities and a management device (virtual power generation central device 103) capable of communicating with the plurality of power supply devices. And the management device selects the power supply device to be the target of the operation command based on evaluation criteria such as economic efficiency, the degree of influence on customers in power load reduction, reliability in starting the power supply device, the possibility of failure of the power supply device and the extension of the operating life, the follow-up speed of the power supply device to a control command, and the communication performance of the power supply device.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] When using power generation devices such as fuel cell systems as the above-mentioned power supply devices and having multiple such power generation devices provide adjustment power, it is preferable that the total amount of energy consumed by these multiple power generation devices be small. However, the power generation efficiency of each power generation device differs. Furthermore, even with a single power generation device, the power generation efficiency differs depending on the power generated. For example, even if the same amount of adjustment power is provided, if the power output before the change in output is different, the amount of change in energy consumed by the power generation device will be different. For example, considering the case of increasing the power output of a power generation device by 100W, the increase in energy consumed may be larger when increasing the power output from 100W to 200W than when increasing it from 500W to 600W.

[0006] This invention has been made in view of the above-mentioned problems, and its purpose is to provide a power generation management system that can determine the output variation range so that the amount of energy consumed by the power generation device can be appropriately controlled. [Means for solving the problem]

[0007] A characteristic configuration of the power generation management system according to the present invention for achieving the above objective is a power generation management system comprising a power generation device installed in each of a plurality of facilities and capable of outputting power, and a management device capable of communicating with the plurality of power generation devices from a remote location outside the facilities, The aforementioned power generation device includes a power generation unit connected to the power grid, The power load device installed in the facility is configured to receive power from at least one of the power generation device and the power system installed in the facility. The management device performs a command transmission process to send output control commands to a plurality of power generation devices to determine the output power of the power generation devices. When the power generation device receives the output control command from the management device, it operates with the goal of supplying the output power determined based on the output control command during the control period covered by the output control command. The aforementioned control device is In the command transmission process, when transmitting the output control command that changes the total output power of the multiple power generators by a predetermined overall output change range, before the command transmission process, an allocation process is performed to allocate the overall output change range as an individual output change range for at least one of the multiple power generators. The key feature of the distribution process is that it determines the individual output change range to be distributed to the multiple power generators by referring to the total amount of energy consumed by each of the multiple power generators when each of the multiple power generators is operated for a predetermined period of time at the output power after the distribution process. Here, the management device can derive the amount of energy consumed based on the correlation between the output power of the power generator and the amount of energy required for the operation of the power generator.

[0008] According to the above characteristic configuration, the management device, in the allocation process that distributes the total output change range when the total output power of multiple power generators is changed as an individual output change range for at least one of the multiple power generators, refers to the total amount of energy consumed by each of the multiple power generators when they are operated for a predetermined period at the output power after each allocation process, and determines the individual output change range to be allocated to the multiple power generators. In other words, by referring to the total amount of energy consumed by each of the multiple power generators, it is possible to provide a power generation management system that can determine an output change range that allows the amount of energy consumed by the power generators to be appropriate.

[0009] Another characteristic configuration of the power generation management system according to the present invention is that the management device determines the individual output change range to be distributed to the plurality of power generation devices in the distribution process so as to reduce the total amount of energy consumed.

[0010] According to the above characteristic configuration, the management device can optimize the amount of energy consumed by the power generators by determining the individual output change range to be distributed to the multiple power generators so that the total amount of energy consumed by each of the multiple power generators is small when the multiple power generators are operated for a predetermined period at the output power after their respective distribution processing.

[0011] Another characteristic configuration of the power generation management system according to the present invention is that the power generation device is a device that generates both heat and electricity. The key is to determine the individual output variation range to be distributed to the multiple power generators such that the value obtained by subtracting the total amount of energy consumed from the standard energy consumption amount required when the total amount of electricity generated is procured from the power grid and the total amount of heat generated is procured from other heat source devices when the multiple power generators are operated for a predetermined period at the output power after each of the distribution processes is large.

[0012] The value obtained by subtracting the total amount of energy consumed from the standard amount of energy consumed can be said to be the benefit obtained by operating multiple power generation devices to which individual output variation ranges are allocated. Therefore, in this feature configuration, the individual output change range to be distributed to multiple power generation devices can be determined so that the value obtained by subtracting the total amount of energy consumed from the standard amount of energy consumed is large, that is, so that the benefit is large.

[0013] Another characteristic configuration of the power generation management system according to the present invention is that the management device acquires information about the output power of the power generation device and energy consumption information, which includes information about the amount of energy consumed by the power generation device to generate the output power, obtained during the operation of the power generation device, and determines the correlation based on the energy consumption information.

[0014] According to the above characteristic configuration, the management device can determine the correlation based on the consumption energy information including information on the output power of the power generation device and information on the amount of consumed energy required for the power generation device to generate the output power, which is acquired during the operation of the power generation device. That is, for example, even if the correlation changes due to deterioration of the power generation device or the like, the amount of consumed energy required for the power generation device can be determined based on the latest determined correlation.

Brief Description of the Drawings

[0015] [Figure 1] It is a diagram showing the relationship among a facility, a management device, and an aggregation coordinator. [Figure 2] It is a diagram showing a configuration example of a facility. [Figure 3] It is a diagram schematically depicting a controlled period and an uncontrolled period. [Figure 4] It is a diagram showing the correlation between the power generation amount and the consumed energy amount of a fuel cell device. [Figure 5] It is a diagram showing the correlation between the power generation amount and the consumed energy amount of a fuel cell device. [Figure 6] It is a diagram showing the total gas consumption of a plurality of fuel cell devices when the individual output change range of the fuel cell device is changed.

Embodiments for Carrying Out the Invention

[0016] FIG. 1 is a diagram showing the relationship among a facility 20 in which a fuel cell device 10 and a power load device 4 are provided, a management device 30, and an aggregation coordinator 40. FIG. 2 is a diagram showing a configuration example of the facility 20. The power generation management system includes a fuel cell device 10 as a power generation device that is installed in each of a plurality of facilities 20 and can supply power to a power line 2 connected to a power grid 1 in each of the plurality of facilities 20, and a management device 30 that can communicate with the plurality of fuel cell devices 10 from a remote location outside the facility 20. Note that the number of management devices 30 and the number of facilities 20 shown in FIG. 1 can be appropriately changed.

[0017] The management device 30, also called a resource aggregator or the like, is an operator that controls the customer-side energy resources by transmitting control information to the fuel cell device 10 and the power load device 4 as customer-side energy resources to the facilities 20 that have concluded a VPP (Virtual Power Plant) service contract. The aggregation coordinator 40 is an operator that bundles the amounts of power controlled by each management device 30 and conducts power transactions with general power transmission and distribution operators and retail electricity operators in the electricity trading market and the like.

[0018] The management device 30 sequentially collects and stores power information such as the output power of the fuel cell device 10, the load power of the power load device 4, and the power at the power receiving point at the facility 20 (that is, the actual reverse power flow supplied from the facility 20 to the power system 1 and the received power supplied from the power system 1 to the facility 20) from a plurality of facilities 20. As will be described later, the fuel cell device 10 can know the reverse power flow (an example of the power at the power receiving point) supplied from the facility 20 to the power system 1 by referring to the measurement result of the power measurement unit 8, and can transmit the reverse power flow (an example of the power at the power receiving point) to the management device 30 as one of the above power information. That is, the management device 30 can acquire information about the actual reverse power flow supplied from a plurality of facilities 20 to the power system 1. When the "load power of the power load device 4" is described in this embodiment, it means the total load power of all the power load devices 4 provided in the facility 20. Then, the management device 30 predicts the power that can be supplied from each facility 20 in a predetermined future time period and transmits it to the aggregation coordinator 40. This available power is the adjustment margin such as the ability to increase or decrease the power at the power receiving point of the facility 20. In this embodiment, when it is said that "increase the power at the power receiving point", it means increasing the received power from the power system 1 to the power line 2 or decreasing the reverse power flow from the power line 2 to the power system 1, and when it is said that "decrease the power at the power receiving point", it means decreasing the received power from the power system 1 to the power line 2 or increasing the reverse power flow from the power line 2 to the power system 1.

[0019] For example, to increase the power at the point of power reception of facility 20, at least one of the following must be done: decrease the output power of the fuel cell device 10 and increase the load power of the power load device 4. Therefore, the adjustment margin on the upward side when increasing the power at the point of power reception of facility 20 indicates how much margin there is to decrease the output power of the fuel cell device 10 and how much margin there is to increase the load power of the power load device 4. Also, to decrease the power at the point of power reception of facility 20, at least one of the following must be done: increase the output power of the fuel cell device 10 and decrease the load power of the power load device 4. Therefore, the adjustment margin on the downward side when decreasing the power at the point of power reception of facility 20 indicates how much margin there is to increase the output power of the fuel cell device 10 and how much margin there is to decrease the load power of the power load device 4.

[0020] Furthermore, the management device 30 determines the baseline power at the multiple facilities 20 under its management. This baseline power at the base point corresponds to the total power at the base point of each facility 20, which is predicted to be achieved if no adjustment power (i.e., adjustment power provided to transmission and distribution operators and supply power provided to retail operators, etc.) is provided from each facility 20.

[0021] The aggregation coordinator 40 aggregates the available power received from each control device 30 and conducts power transactions with general transmission and distribution companies and retail electricity companies by bidding in power trading markets such as the supply and demand adjustment market, the wholesale power market, and the capacity market. When the aggregation coordinator 40 receives a supply order for adjustment capacity, etc., for a predetermined control period in the future from the general transmission and distribution company or retail electricity company with which it has conducted transactions, it distributes and transmits the adjustment capacity, etc., specified in the supply order to each control device 30.

[0022] When the management device 30 receives a supply order from the aggregation coordinator 40, it distributes and transmits the adjustment power etc. specified in the supply order to each facility 20. As a result, each facility 20 receives adjustment power etc., which increases or decreases the power at the power receiving point of the facility 20 compared to a future predetermined control period, by controlling the fuel cell device 10 and power load device 4 as consumer-side energy resources.

[0023] Facility 20 is equipped with a fuel cell device 10 and a power load device 4. The fuel cell device 10 and the power load device 4 are connected to power lines 2 which are connected to the power grid 1. Figures 1 and 2 show an example in which one fuel cell device 10 is installed, but the number of fuel cell devices 10 installed can be changed as appropriate.

[0024] The power load device 4 is a variety of devices, such as lighting equipment and air conditioning equipment, and can receive power from at least one of the fuel cell device 10 and the power system 1 installed in the facility 20.

[0025] The fuel cell device 10 is a device that generates both heat and electricity. The heat recovered from the fuel cell device 10 can be supplied to the heat load device 15.

[0026] The fuel cell device 10, as a power generation device, comprises a fuel cell unit 12 as a power generation unit connected to a power line 2 connected to a power grid 1, a power conversion unit 11 that converts the power generated by the fuel cell unit 12 to a predetermined voltage, frequency, and phase and supplies it to the power line 2, a fuel cell control unit 13 that controls the operation of the fuel cell unit 12 and the power conversion unit 11, and a storage unit 14 that stores information handled by the fuel cell device 10. The fuel cell device 10 may also include a fuel reformer that produces hydrogen, which is the fuel gas for the fuel cell unit 12, by reforming a raw fuel gas (e.g., city gas) containing hydrocarbons such as methane.

[0027] The fuel cell control unit 13 can adjust the output power from the fuel cell device 10 to the power line 2 between a predetermined upper limit output power and a predetermined lower limit output power. For example, the fuel cell control unit 13 can maintain the output power of the fuel cell device 10 at the upper limit output power for continuous operation. The fuel cell control unit 13 can also operate the fuel cell device 10 so that its output power follows the load power of the power load device 4. For example, the fuel cell control unit 13 can adjust the output power of the fuel cell device 10 so that the power measured by the power measurement unit 8 (i.e., the power supplied from the power system 1) is zero or close to zero, thereby causing the fuel cell control unit 13 to operate in a way that follows the load power of the power load device 4. Alternatively, the fuel cell control unit 13 can adjust the output power of the fuel cell device 10 so that the power measured by the power measurement unit 8 is a predetermined negative power (i.e., a predetermined reverse power flow power).

[0028] The fuel cell control unit 13 has information about the output power supplied from the power conversion unit 11 to the power line 2 and information about the power measured by the power measurement unit 8, so it can derive the load power of the power load device 4 (= output power + measured power). If the sign of the power measured by the power measurement unit 8 is positive, it means that the load power is greater than the output power of the fuel cell device 10, and if the sign of the power measured by the power measurement unit 8 is negative, it means that the output power of the fuel cell device 10 is greater than the load power (i.e., reverse power flow is being supplied from the facility 20 to the power system 1).

[0029] The fuel cell device 10 is connected to a remote control 7, which is operated by users of the facility 20 when they issue commands to the fuel cell device 10. Information about the output power and load power of the fuel cell device 10 is transmitted to the management device 30 via the remote control 7 and router 6. For example, information about the output power and load power of the fuel cell device 10 is transmitted to the management device 30 at predetermined intervals, such as every minute.

[0030] As described above, the control device 30 can send output control commands to multiple fuel cell devices 10 that determine the output power of each fuel cell device. When a fuel cell device 10 receives an output control command from the control device 30, it operates in a first operating mode during the controlled period covered by the output control command, aiming to supply the output power determined based on the output control command. During the non-controlled period, which is outside the controlled period, it operates in a second operating mode, which is different from the first operating mode.

[0031] The second operating mode is an operating mode that is pre-set in multiple fuel cell devices 10. Alternatively, the control device 30 can send an operating mode control command to multiple fuel cell devices 10 to determine the second operating mode, and the fuel cell devices 10 determine the second operating mode according to the operating mode control command received from the control device 30.

[0032] For example, the fuel cell control unit 13 can operate the fuel cell device 10 continuously by maintaining its output power at the upper limit output power as a second operating mode. Alternatively, the fuel cell control unit 13 can also operate the fuel cell device 10 in a way that tracks the load power of the power load device 4 as a second operating mode. For example, the fuel cell control unit 13 can adjust the output power of the fuel cell device 10 so that the power measured by the power measurement unit 8 (i.e., the power supplied from the power system 1) is zero or close to zero, thereby causing the fuel cell control unit 13 to track the load power of the power load device 4.

[0033] Figure 3 is a schematic diagram illustrating the controlled period and the uncontrolled period. In the example shown in Figure 3, the control information (output control command) specifies that the period from 12:00 to 15:00 is the controlled period. Therefore, this fuel cell device 10 operates in the first operating mode during the controlled period from 12:00 to 15:00, and in the second operating mode during the other uncontrolled periods.

[0034] Next, we will explain the output power commanded to the multiple fuel cell devices 10 in the first operating mode. As described above, when the management device 30 receives a supply order from the aggregation coordinator 40, it distributes and transmits the adjustment power, etc., specified in the supply order to each facility 20. Specifically, when the management device 30 transmits an output control order in the command transmission process that changes the total output power of the multiple fuel cell devices 10 by a predetermined overall output change range, it performs an allocation process before the command transmission process to allocate the overall output change range as an individual output change range for at least one of the multiple fuel cell devices 10. Then, in the allocation process, the management device 30 refers to the total amount of energy consumed by each of the multiple fuel cell devices 10 when they are operated for a predetermined period at the output power after each allocation process, and determines the individual output change range to be allocated to the multiple fuel cell devices 10. For example, in the allocation process, the management device 30 determines the individual output change range to be allocated to the multiple fuel cell devices 10 in such a way that the total amount of energy consumed is small.

[0035] The following describes a method for distributing a total output change of 200W to two fuel cell devices 10: fuel cell device 10A (10) with a current output power of 200W and fuel cell device 10B (10) with a current output power of 300W. In other words, the output power of fuel cell device 10A before distribution processing is 200W, and the output power of fuel cell device 10B before distribution processing is 300W. Also, since the total output change is 200W, a maximum individual output change of 200W is allocated to fuel cell devices 10A and 10B.

[0036] [Example of distribution process 1] Figure 4 shows the correlation between the amount of power generated and the amount of energy consumed by the fuel cell device 10A, and Figure 5 shows the correlation between the amount of power generated and the amount of energy consumed by the fuel cell device 10B. In this embodiment, the fuel cell device 10 generates electricity by consuming raw fuel gas containing hydrocarbons such as methane, so in the figures, the amount of gas consumed by the raw fuel gas is shown as an example of the amount of energy consumed, but other values ​​may also be used as the amount of energy consumed. As shown in the figures, as the amount of power generated by the fuel cell device 10 increases, the amount of gas consumed (amount of energy consumed) by the fuel cell device 10 also increases.

[0037] The correlations shown in Figures 4 and 5 are information that the management device 30 has stored in advance. In other words, the management device 30 derives the amount of energy consumed based on the correlation between the output power of the fuel cell device 10 and the amount of energy required for the operation of the fuel cell device 10.

[0038] Furthermore, the management device 30 may update this correlation sequentially. For example, the management device 30 may acquire information about the output power of the fuel cell device 10 and energy consumption information, which includes information about the amount of energy consumed by the fuel cell device 10 to generate the output power, obtained during the operation of the fuel cell device 10, and determine the correlation based on the energy consumption information.

[0039] Figure 6 shows the total gas consumption of fuel cell unit 10A and fuel cell unit 10B when the individual output variation range of fuel cell unit 10A is varied from 0W to 200W. Specifically, Figure 6 shows the total gas consumption of fuel cell unit 10A and fuel cell unit 10B when the individual output variation range is varied between the case where the individual output variation range of fuel cell unit 10A is 0W (output power after distribution processing is 200W) and the individual output variation range of fuel cell unit 10B is 200W (output power after distribution processing is 500W) and the case where the individual output variation range of fuel cell unit 10A is 200W (output power after distribution processing is 400W) and the individual output variation range of fuel cell unit 10B is 0W (output power after distribution processing is 300W).

[0040] In the example shown in Figure 6, the total gas consumption is smallest when the individual output change range for fuel cell unit 10A is set to 150W (output power after distribution processing is 350W) and the individual output change range for fuel cell unit 10B is set to 50W (output power after distribution processing is 350W). Therefore, in the distribution process, the management device 30 determines the individual output change range to be allocated to fuel cell unit 10A to be 150W and the individual output change range to be allocated to fuel cell unit 10B to be 50W, so that the total amount of energy consumed is as small as possible.

[0041] To elaborate, the management device 30, in the allocation process, determines the individual output change range to allocate to the multiple fuel cell devices 10 by referring to the difference between the sum of the first energy consumption amounts required by each of the multiple fuel cell devices 10 when they are operated for a predetermined period at the output power before each allocation process, and the sum of the second energy consumption amounts required by each of the multiple fuel cell devices 10 when they are operated for a predetermined period at the output power after each allocation process.

[0042] For example, consider the case where the above-mentioned overall output change range increases the total output power of multiple fuel cell devices 10. In this case, when the control device 30 transmits an output control command in the command transmission process to increase the total output power of the multiple fuel cell devices 10 by the overall output increase range (overall output change range), before the command transmission process, it performs an allocation process to distribute the overall output increase range as an individual output increase range to at least one of the multiple fuel cell devices 10. In the allocation process, it is sufficient to determine the individual output increase range to be distributed to the multiple fuel cell devices 10 such that the difference between the total first energy consumption and the total second energy consumption is small.

[0043] Alternatively, consider the case where the overall output change reduces the total output power of the multiple fuel cell devices 10. In this case, when the control device 30 transmits an output control command in the command transmission process to reduce the total output power of the multiple fuel cell devices 10 by the overall output reduction amount (overall output change amount), before the command transmission process, it performs an allocation process to distribute the overall output reduction amount as an individual output reduction amount to at least one of the multiple fuel cell devices 10. In the allocation process, it is sufficient to determine the individual output reduction amounts to be distributed to the multiple fuel cell devices 10 such that the difference between the total first energy consumption and the total second energy consumption amount is large.

[0044] [Example of distribution process 2] As described above, the fuel cell device 10 is a device that generates both heat and electricity. Therefore, energy-saving effects can be obtained by operating the fuel cell device 10. For example, when operating multiple fuel cell devices 10 for a predetermined period at the output power after each distribution process, the value obtained by subtracting the total amount of energy consumed by each of the multiple fuel cell devices 10 when operating them for a predetermined period at the output power after each distribution process from the standard energy consumption amount required when the total amount of electricity generated is procured from the power grid 1 and the total amount of heat generated is procured from other heat source devices can be said to be the benefit obtained by operating multiple fuel cell devices 10 to which individual output change ranges are allocated. Therefore, the management device 30 may determine the individual output change ranges to be allocated to the multiple fuel cell devices 10 so as to increase the value obtained by subtracting the total amount of energy consumed from the standard energy consumption amount.

[0045] <Another Embodiment> In the above embodiment, the configuration of the power generation management system was described with specific examples, but the configuration can be changed as appropriate. For example, in the above embodiment, an example was described in which the fuel cell device 10 is used as a power generation device, but the power generation device may be a device comprising an engine and a generator driven by that engine.

[0046] In the above embodiment, specific numerical values ​​were used as examples to illustrate gas consumption, power generation, etc., but these values ​​are provided for illustrative purposes only and can be changed as appropriate.

[0047] The configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, as long as no inconsistencies arise. Furthermore, the embodiments disclosed herein are illustrative, and the embodiments of the present invention are not limited thereto and can be modified as appropriate without departing from the purpose of the present invention. [Industrial applicability]

[0048] This invention can be used in a power generation management system that can determine an output variation range that allows the amount of energy consumed by a power generation device to be appropriately controlled. [Explanation of Symbols]

[0049] 1: Power system 2: Power lines 4:Power load device 6: Router 7: Remote control 8: Power measurement unit 10 (10A, 10B): Fuel cell device (power generation device) 11: Power conversion unit 12: Fuel cell section (power generation section) 13: Fuel cell control unit 14: Storage section 15:Heat load device 20: Facilities 30: Management device 40: Aggregation Coordinator

Claims

1. A power generation management system comprising a power generation device installed in each of several facilities and capable of outputting power, and a management device capable of communicating with the multiple power generation devices from a remote location outside the facilities, The aforementioned power generation device includes a power generation unit connected to the power grid, The power load device installed in the facility is configured to receive power from at least one of the power generation device and the power system installed in the facility. The management device performs a command transmission process to send output control commands to a plurality of power generation devices to determine the output power of the power generation devices. When the power generation device receives the output control command from the management device, it operates with the goal of supplying the output power determined based on the output control command during the control period covered by the output control command. The aforementioned control device is In the command transmission process, when transmitting the output control command that changes the total output power of the multiple power generators by a predetermined overall output change range, before the command transmission process, an allocation process is performed to allocate the overall output change range as an individual output change range for at least one of the multiple power generators. A power generation management system that determines the individual output change range to be distributed to a plurality of power generation devices by referring to the total amount of energy consumed by each of the plurality of power generation devices when each of the plurality of power generation devices is operated for a predetermined period of time at the output power after the respective distribution process.

2. The power generation management system according to claim 1, wherein the management device determines the individual output change range to be distributed to the plurality of power generation devices in the distribution process such that the total amount of energy consumed is reduced.

3. The aforementioned power generation device is a device that generates both heat and electricity. The power generation management system according to claim 1, which determines the individual output change range to be distributed to the multiple power generation devices such that the value obtained by subtracting the total amount of energy consumed from the standard energy consumption amount required when the total amount of electricity generated is procured from the power grid and the total amount of heat generated is procured from other heat source devices when the multiple power generation devices are operated for a predetermined period of time at the output power after each of the distribution processes is large.

4. The power generation management system according to any one of claims 1 to 3, wherein the management device derives the amount of energy consumed based on the correlation between the output power of the power generation device and the amount of energy required for the operation of the power generation device.

5. The power generation management system according to claim 4, wherein the management device acquires information about the output power of the power generation device acquired during the operation of the power generation device, and energy consumption information including information about the amount of energy consumed by the power generation device to generate the output power, and determines the correlation based on the energy consumption information.

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