Operation management device

Abstract

Provided is an operation management device that, in a prescribed case, can perform operation of a power generation system that is suitable for a demand for the power generation system, thereby ensuring convenience of the power generation system. This operation management device manages the operation of a power generation system provided with an engine generator and a fuel cell generator, and is provided with a processing unit that operates either the engine generator or the fuel cell generator when a request output for the power generation system is equal to or less than a first predetermined value.

Description

Technical Field

[0001] This invention relates to an operation management device. Background Technology

[0002] Patent Document 1 discloses a generator engine operation control device for controlling the operation of multiple generator engines (e.g., diesel engines). The multiple generator engines are equipped in a generator system.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2004-211624

[0004] In recent years, from a carbon neutrality perspective, there has been a desire for power generation systems that combine engine generators and fuel cell generators. While both engine generators and fuel cell generators use hydrogen as fuel to generate electricity, engine generators generally have higher maintenance efficiency but lower power generation efficiency compared to fuel cell generators. Therefore, under certain circumstances, the requirements for the power generation system sometimes change (prioritizing maintenance efficiency, prioritizing power generation efficiency, etc.). When such changes occur, if the operation management device that manages the power generation system cannot operate it in a manner suitable for the changed requirements, the power generation system becomes inconvenient. Summary of the Invention

[0005] The present invention was made to solve the above-mentioned problems, and its purpose is to provide an operation management device that, under specified conditions, can operate the power generation system in a manner suitable to the requirements of the power generation system, thereby ensuring the convenience of the power generation system.

[0006] One aspect of the present invention relates to an operation management device that manages the operation of a power generation system equipped with an engine generator and a fuel cell generator. The device includes a processing unit that, when the requested output of the power generation system is below a first predetermined value, causes one of the engine generator and the fuel cell generator to operate.

[0007] Another aspect of the present invention relates to an operation management device that manages the operation of a power generation system equipped with an engine generator and a fuel cell generator. The operation management device includes a processing unit that, when the requested output of the power generation system is a second predetermined value or higher, causes one of the engine generator and the fuel cell generator to operate.

[0008] Based on the above structure, under specified conditions, the power generation system can be operated in a manner suitable for the requirements of the power generation system, thereby ensuring the convenience of the power generation system. Attached Figure Description

[0009] Figure 1This is a block diagram schematically illustrating the general structure of an operation management device according to one embodiment of the present invention.

[0010] Figure 2 This is a flowchart illustrating the process by which the aforementioned operation management device manages the operation of the power generation system.

[0011] Figure 3 This is an explanatory diagram illustrating the operating mode of the aforementioned power generation system.

[0012] Figure 4 This is an explanatory diagram illustrating a variation of the above operating mode.

[0013] Figure 5 This is an explanatory diagram illustrating another variation of the above-described operating mode.

[0014] Figure 6 This is an explanatory diagram illustrating a variation of the connection between the aforementioned operation management device and the power generation enterprise system.

[0015] Explanation of reference numerals in the attached figures

[0016] 1... Operation management device; 1a... Processing unit; 2... Power generation system; 2a... Request output; 21... Engine generator; 22... Fuel cell cogeneration unit; 101... Commercial power system; FCG... Fuel cell generator; X1... First specified value; X2... Second specified value; X3... Third specified value; X4... Fourth specified value. Detailed Implementation

[0017] The embodiments of the present invention are described below based on the accompanying drawings.

[0018] [1. General structure of the operation management device]

[0019] Figure 1 This is a block diagram schematically illustrating the general structure of an operation management device 1 according to one embodiment of the present invention. The operation management device 1 is a computer device disposed near the power generation system 2 (specifically, within the land where the power generation system 2 is installed). However, the operation management device 1 is not limited to the above structure; for example, it may be a server device capable of communication via a network or other communication lines.

[0020] The operation management device 1 includes a processing unit 1a, a storage unit 1b, and a communication unit 1c. The processing unit 1a is, for example, a processor or a microprocessor. The storage unit 1b is a main storage device such as ROM (Read Only Memory) or RAM (Random Access Memory). The storage unit 1b may also include auxiliary storage devices such as HDD (Hard Disk Drive) or SSD (Solid State Drive). Various programs and data are stored in the storage unit 1b. The processing unit 1a reads various programs from the storage unit 1b and performs calculations according to the programs. Thus, for example, the processing unit 1a can manage the operation of the power generation system 2 based on the operating mode. That is, the operation management device 1 can manage the operation of the power generation system 2. The programs stored in the storage unit 1b can be provided, for example, by a computer-readable non-volatile recording medium. As another example, programs can also be provided from a program providing server via a communication line such as a network.

[0021] The communication unit 1c communicates with, for example, the communication terminal device PP1 of the power generation company and the information server SV1 managed by a general power transmission and distribution company via communication lines such as a network. The communication terminal device PP1 may include, for example, a personal computer or a smartphone. More specifically, the connection between the communication unit 1c and the aforementioned communication lines is made via a wireless router (not shown) installed outside the operation management device 1. That is, communication between the communication unit 1c and the communication terminal device PP1 is conducted wirelessly. Furthermore, communication between the communication unit 1c and the information server SV1 is also conducted wirelessly. However, the communication between the communication unit 1c and the communication terminal device PP1 or the information server SV1 is not limited to the above structure. For example, communication between the communication unit 1c and the communication terminal device PP1 or the information server SV1 may also be conducted via wired communication.

[0022] The power generation system 2 is interconnected with the commercial power system 101. More specifically, the power generation system 2 includes an engine generator 21 and multiple (two in this embodiment) fuel cell cogeneration units 22, which are interconnected with the commercial power system 101. Furthermore, in this embodiment, the number of engine generators 21 is one, but not limited to one; it can be multiple (two or more). Additionally, the number of fuel cell cogeneration units 22 is two, but not limited to two; it can be one, or three or more.

[0023] Commercial power system 101 includes commercial power source 101a and supplies commercial power generated by commercial power source 101a. Load 102 is connected to commercial power system 101. Load 102 includes, for example, household electrical appliances, industrial (facility) electrical appliances, etc. Specifically, motors, pumps, etc. installed in such equipment consume electricity. Therefore, the power required (power consumed) of load 102 is supplied by the power generated by power generation system 2 and commercial power supplied from commercial power system 101.

[0024] The generator 21 includes a hydrogen engine 21a and a generator 21b connected to the hydrogen engine 21a. The hydrogen engine 21a injects hydrogen into the intake air to generate a mixture, compresses the mixture, and ignites the compressed mixture to burn the hydrogen, thereby generating power. In other words, the hydrogen engine 21a in this embodiment is a dedicated hydrogen combustion engine. The power output from the hydrogen engine 21a is transmitted to the generator 21b. Using this power, the generator 21b generates electricity. The electricity generated by the generator 21b is supplied to the load 102.

[0025] Furthermore, the structure of the hydrogen engine 21a is not limited to the above-described case; for example, it could also be a hydrogen co-firing engine that uses liquid fuels such as light oil and hydrogen as fuel. In the case where the hydrogen engine 21a is the aforementioned hydrogen co-firing engine, for example, the hydrogen engine 21a injects hydrogen into the intake air to generate a mixture, compresses the mixture, and injects liquid fuel into the mixture, which becomes hot, causing the hydrogen to burn and thereby obtaining power.

[0026] Furthermore, the hydrogen engine 21a generates heat when it produces power. More specifically, the heat generated by the hydrogen engine 21a increases as the output power increases. Therefore, the heat (waste heat) generated by the hydrogen engine 21a can also be recovered within the engine generator 21, for example, for efficient use in hot water supply, heating, etc. That is, the engine generator 21 may also include a hydrogen engine cogeneration unit capable of recovering the waste heat of the hydrogen engine 21a.

[0027] In addition, the engine generator 21 has a control device 21c. The control device 21c is composed of a computer device and controls the various parts of the engine generator 21 (including the hydrogen engine 21a and the generator 21b). Furthermore, the control device 21c is communicatively connected to the operation management device 1. For example, the control device 21c controls the hydrogen engine 21a and the generator 21b based on the operation instructions output from the operation management device 1.

[0028] Furthermore, the engine generator 21 can also replace the hydrogen engine 21a (or, based on this), and have an engine other than the hydrogen engine 21a. For example, the engine generator 21 can also replace the hydrogen engine 21a and have a gas engine that uses gaseous fuels other than hydrogen (such as natural gas) as fuel, or it can have a diesel engine or a gasoline engine.

[0029] The fuel cell cogeneration unit 22 is an example of a fuel cell generator (FCG). That is, the fuel cell generator (FCG) includes the fuel cell cogeneration unit 22. Therefore, the power generation system 2 has multiple fuel cell generators (FCGs, which are fuel cell cogeneration units 22 in this embodiment).

[0030] Furthermore, in this embodiment, the case where the fuel cell generator FCG is "one of the engine generator 21 and the fuel cell generator FCG", and the engine generator 21 is "the other of the engine generator 21 and the fuel cell generator FCG" is described. However, it is not limited to this; for example, the engine generator 21 may be "one of the engine generator 21 and the fuel cell generator FCG", and the fuel cell generator FCG may be "the other of the engine generator 21 and the fuel cell generator FCG".

[0031] Each fuel cell cogeneration unit 22 includes a fuel cell 22a. The fuel cell 22a (also referred to as a fuel cell stack) generates electricity using hydrogen and oxidant gas supplied from outside the fuel cell cogeneration unit 22. In this embodiment, air is used as the oxidant gas. However, the oxidant gas is not limited to air; any gas containing oxygen is acceptable.

[0032] Fuel cell 22a consists of multiple stacked individual cells. Each individual cell includes a solid polymer electrolyte membrane, an anode, a cathode, and a pair of separators. The anode and cathode sandwich the solid polymer electrolyte membrane. The anode is the negative electrode (fuel electrode) and includes an anode catalyst layer and a gas diffusion layer. The cathode is the positive electrode (air electrode) and includes a cathode catalyst layer and a diffusion layer. The anode, solid polymer electrolyte membrane, and cathode constitute a membrane electrode assembly (MEA). A pair of separators sandwich the MEA. Each separator has multiple slots. The slots of one separator form a hydrogen flow path. The slots of the other separator form an air flow path.

[0033] On the anode side, hydrogen is decomposed into hydrogen ions and electrons by a catalyst. Hydrogen ions move towards the cathode through the solid polymer electrolyte membrane. Conversely, electrons move towards the cathode through an external circuit. This generates an electric current (power generation). On the cathode side, oxygen from the air combines with electrons flowing from the external circuit and hydrogen ions passing through the solid polymer electrolyte membrane to form water. The generated water is contained in the exhaust gas and discharged to the outside of the fuel cell cogeneration unit 22. The electricity generated by the fuel cell 22a is supplied to the load 102 via a boost converter and inverter (both not shown) located inside the fuel cell cogeneration unit 22.

[0034] Fuel cell 22a generates heat during power generation. More specifically, the heat generated by fuel cell 22a increases as the amount of electricity generated increases. The heat (waste heat) generated during power generation by fuel cell 22a is recovered inside fuel cell cogeneration unit 22, for example, for efficient use in hot water supply, heating, etc. That is, fuel cell cogeneration unit 22 is able to recover the waste heat generated during power generation by fuel cell 22a.

[0035] From the viewpoint of effectively utilizing the waste heat generated during the power generation of the fuel cell 22a and improving overall efficiency, it is preferable that the fuel cell generator FCG includes a fuel cell cogeneration device 22 for recovering the waste heat generated during the power generation of the fuel cell 22a, as in this embodiment.

[0036] The power generation system 2 also includes an integrated controller 23. The integrated controller 23, composed of a computer device, controls the operation of each fuel cell cogeneration unit 22. Furthermore, the integrated controller 23 is communicatively connected to the operation management unit 1 and each fuel cell cogeneration unit 22. For example, the integrated controller 23 controls the operation of each fuel cell cogeneration unit 22 based on operation instructions output from the operation management unit 1. In addition, the integrated controller 23 is located near each fuel cell cogeneration unit 22 or near the operation management unit 1.

[0037] The operation plan (power generation plan) of power generation system 2 is formulated by the power generation company of power generation system 2 and input to the operation management device 1 via the communication terminal device PP1 of the power generation company. Specifically, the power generation company (specifically, the power generation company's operators) operates the communication terminal device PP1 to input the operation plan of power generation system 2. The input operation plan of power generation system 2 is output from the communication terminal device PP1 to the operation management device 1. In this embodiment, the operation plan of power generation system 2 refers to the request output 2a (see below) for power generation system 2 at predetermined time intervals (e.g., every 30 minutes). Figure 3 (etc.). In addition, the operation plan of power generation system 2 is also input into the power generation company system PP2 by the power generation company (specifically, the power generation company's operators).

[0038] The power generation enterprise system PP2 is composed, for example, of a server device capable of communication via a network or other communication lines. The power generation enterprise system PP2 is managed by the power generation enterprise. The power generation enterprise system PP2 can communicatively connect to the integrated server SV2 (via a communication line). Furthermore, the integrated server SV2 can communicatively connect to the information server SV1 (via a communication line). Additionally, the power generation enterprise system PP2 can also communicatively connect to the information server SV1 (via a communication line).

[0039] Information server SV1 is, for example, a server device capable of communication via a network or other communication line. As described above, information server SV1 is managed by a general power transmission and distribution company. Integrated server SV2 is, for example, a server device capable of communication via a network or other communication line. Integrated server SV2 is managed by the Power Wide Area Operation Promotion Agency.

[0040] The operation plan (e.g., the operation plan for the next day) of power generation system 2, input into power generation enterprise system PP2, is output to integrated server SV2. For integrated server SV2, in addition to the operation plan of power generation system 2, the operation plans of each power generation unit (power plant, power generation system, power generation unit, etc.) are also input from the power generation enterprise. Integrated server SV2 centrally outputs these operation plans to information server SV1. Based on the information related to the operation plans output from integrated server SV2, information server SV1 determines whether operation (power generation) needs to be suppressed in each power generation unit. When information server SV1 determines that operation needs to be suppressed, it outputs a suppression instruction. For example, when information server SV1 determines that operation of power generation system 2 needs to be suppressed, it outputs a suppression instruction to operation management device 1.

[0041] The operation management device 1 manages the operation of the power generation system 2 based on the operation plan of the power generation system 2 input via the communication terminal device PP1, and the suppression instruction output from the information server SV1 (if a suppression instruction is output from the information server SV1). Furthermore, in this embodiment, it is assumed that the operation of the power generation system 2 does not need to be suppressed, and no suppression instruction is output from the information server SV1 to the operation management device 1. However, this assumption is merely for illustrative purposes and is not intended to limit whether operation suppression is actually necessary. The operation management of the power generation system 2 by the operation management device 1 will be described below.

[0042] [2. Operation management device for the operation management of the power generation system]

[0043] Figure 2 This is a flowchart illustrating the operation management process of the operation management device 1 on the power generation system 2.

[0044] In step S1, the processing unit 1a (refer to) Figure 1 The operation plan of power generation system 2 is obtained. In this embodiment, as described above, the above-mentioned acquisition is achieved by the power generation company (specifically, the power generation company's operator) operating the communication terminal device PP1 to input the operation plan of power generation system 2. When the operation plan of power generation system 2 is obtained, the process proceeds to the next step S2.

[0045] In step S2, the processing unit 1a sets an operation instruction for the power generation system 2. In this embodiment, the setting is based on a preset operation mode. When the operation instruction for the power generation system 2 is set, the processing proceeds to the next step S3.

[0046] In step S3, the processing unit 1a outputs an operation instruction for the power generation system 2 to the power generation system 2. Based on this operation instruction, the power generation system 2 is put into operation. Hereinafter, based on... Figure 3 The operating modes used to set the operating instructions for power generation system 2 are explained. Figure 3 This is an explanatory diagram illustrating the operating mode. In Figure 3 The diagram illustrates the allocation of the set output (power generation output) in power generation system 2 relative to the requested output 2a to power generation system 2. Specifically, the vertical lines represent the set output allocated to one of the fuel cell cogeneration units 22 relative to the requested output 2a. The horizontal lines represent the set output allocated to the other fuel cell cogeneration unit 22 relative to the requested output 2a. The diagonal lines represent the set output allocated to the engine generator 21 relative to the requested output 2a.

[0047] When the requested output 2a is less than or equal to the first specified value X1, the processing unit 1a (refer to...) Figure 1 ) to the integrated controller 23 (refer to Figure 1 The output of the fuel cell cogeneration unit 22 is an operation instruction to the control device 21c (refer to...). Figure 1 The processing unit 1a outputs a stop instruction for the generator 21. Specifically, the operation instruction for the fuel cell cogeneration unit 22 output from the processing unit 1a to the integrated controller 23 is an instruction to ensure that each fuel cell cogeneration unit 22 operates with the same output. Specifically, the processing unit 1a sets the output of each fuel cell cogeneration unit 22 to the value obtained by dividing the requested output 2a by the number of fuel cell cogeneration units 22 (2 units in this embodiment). That is, the processing unit 1a uniformly sets the output of each fuel cell generator FCG (fuel cell cogeneration unit 22 in this embodiment).

[0048] In this embodiment, the first predetermined value X1 is set to the same value as the sum of the rated outputs of each fuel cell cogeneration unit 22, and is stored in the storage unit 1b (see reference). Figure 1 However, the setting of the first specified value X1 is not limited to the above setting.

[0049] If the outputs of the multiple fuel cell cogeneration units 22 are set uniformly, the deterioration progress of the multiple fuel cell cogeneration units 22 is less likely to deviate. This avoids the dispersion of maintenance operations for the multiple fuel cell cogeneration units 22, preventing a decrease in maintenance efficiency. From this perspective, in the structure of the power generation system 2 having multiple fuel cell generators FCG (in this embodiment, fuel cell cogeneration units 22), the processing unit 1a preferably sets the output of each fuel cell generator FCG uniformly.

[0050] Based on the operation instructions output from the processing unit 1a, the integrated controller 23 controls the operation of each fuel cell cogeneration unit 22. As a result, each fuel cell cogeneration unit 22 operates (generates electricity). Additionally, based on the operation instructions output from the processing unit 1a, the control device 21c stops the operation of the engine generator 21. As a result, the operation (generation) of the engine generator 21 stops. That is, when the requested output 2a is less than or equal to a first predetermined value X1, the processing unit 1a operates one of the engine generator 21 or the fuel cell generator FCG (in this embodiment, the fuel cell cogeneration unit 22).

[0051] When the requested output 2a is between the first specified value X1 and the second specified value X2, the processing unit 1a outputs a stop instruction for the engine generator 21 to the control device 21c and outputs a stop instruction for each fuel cell cogeneration unit 22 to the integrated controller 23.

[0052] In this embodiment, the second predetermined value X2 is set to the same value as the lower limit output of the engine generator 21 and stored in the storage unit 1b. That is, the engine generator 21 cannot operate at a value lower than the second predetermined value X2. However, the setting of the second predetermined value X2 is not limited to the above setting. Furthermore, in this embodiment, the lower limit output of the engine generator 21 is greater than the sum of the rated outputs of each fuel cell cogeneration unit 22. Therefore, the second predetermined value X2 is greater than the first predetermined value X1.

[0053] Based on the operation instruction output from the processing unit 1a, the control device 21c stops the operation of the engine generator 21, and the integrated controller 23 stops the operation of each fuel cell cogeneration unit 22. Thus, the operation of both the engine generator 21 and each fuel cell cogeneration unit 22 stops. That is, when the requested output 2a is between a first predetermined value X1 and a second predetermined value X2, the processing unit 1a stops the operation of the power generation system 2.

[0054] If power generation system 2 and commercial power system 101 (refer to) Figure 1 If the systems are interconnected, even if it is difficult to supply load 102 (refer to) solely with the power generated by power generation system 2, Figure 1 The power required by the generator system 2 can be supplied to the load 102 using commercial power from the commercial power system 101. In this embodiment, as described above, the generator 21 cannot operate below a second predetermined value X2, and the first predetermined value X1 is set to the same value as the sum of the rated outputs of each fuel cell cogeneration unit 22. Therefore, when the requested output 2a is between the first predetermined value X1 and the second predetermined value X2, it is difficult to supply the power required by the load 102 using only the power generated by the generator system 2. In addition, if the operation of the generator system 2 stops, the degradation of the generator system 2 is less likely to occur. That is, from the viewpoint of reliably supplying the power required by the load 102 and suppressing the degradation of the generator system 2, the following structure is preferred. That is, as in this embodiment, it is preferable that the generator system 2 is interconnected with the commercial power system 101, and when the requested output 2a is between the first predetermined value X1 and the second predetermined value X2, the processing unit 1a stops the operation of the generator system 2.

[0055] However, the processing unit 1a is not limited to a structure where the operation of the power generation system 2 is stopped when the requested output 2a is between the first predetermined value X1 and the second predetermined value X2. For example, the processing unit 1a can also operate the power generation system 2 when the requested output 2a is between the first predetermined value X1 and the second predetermined value X2. Thus, a portion of the power required by the load 102 is supplied by the output of the power generation system 2.

[0056] When the requested output 2a is greater than or equal to the second predetermined value X2, the processing unit 1a outputs an operation instruction for the engine generator 21 to the control device 21c and an operation instruction for each fuel cell cogeneration unit 22 to the integrated controller 23. Based on the operation instructions output from the processing unit 1a, the control device 21c controls the operation of the engine generator 21. As a result, the engine generator 21 operates (generates electricity). That is, when the requested output 2a is greater than or equal to the second predetermined value X2, the processing unit 1a causes the other of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell cogeneration unit 22) to operate (in this embodiment, the engine generator 21).

[0057] Furthermore, similar to the case where the requested output 2a is less than or equal to the first predetermined value X1, the integrated controller 23 controls the operation of each fuel cell cogeneration unit 22 based on the operation instruction output from the processing unit 1a, thereby enabling each fuel cell cogeneration unit 22 to operate. That is, when the requested output 2a is greater than or equal to the second predetermined value X2, the processing unit 1a causes one of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell cogeneration unit 22) (in this embodiment, the fuel cell generator FCG) to operate.

[0058] According to the above structure, when the requested output 2a is less than or equal to a first specified value X1 or greater than a second specified value X2, one of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell generator FCG) can be operated. Compared to the engine generator 21, the fuel cell generator FCG has higher power generation efficiency and lower maintenance efficiency (shorter maintenance intervals). Therefore, it is possible to achieve operation of the power generation system 2 where power generation efficiency takes precedence over maintenance efficiency. Conversely, if the engine generator 21 is chosen as one of the engine generator 21 and the fuel cell generator FCG, the engine generator 21 can be operated. In this case, it is possible to achieve operation of the power generation system 2 where maintenance efficiency takes precedence over power generation efficiency.

[0059] Therefore, regardless of the requirements for maintenance efficiency or power generation efficiency, the operation of the power generation system 2 can be made to meet the requirements of the power generation system 2. That is, even if the requirements for the power generation system 2 are changed, it can be prevented from becoming inconvenient, and the convenience of the power generation system 2 can be ensured. Thus, under specified conditions, the operation of the power generation system 2 can be carried out in a manner suitable for the requirements of the power generation system 2, thereby ensuring the convenience of the power generation system 2.

[0060] When the operation of the power generation system 2 is biased towards either the engine generator 21 or the fuel cell cogeneration unit 22, the deterioration progress of the engine generator 21 and the deterioration progress of the fuel cell cogeneration unit 22 are prone to diverge. If such a deviation occurs, maintenance work on the engine generator 21 and the fuel cell cogeneration unit 22 will be performed separately, reducing the efficiency of maintenance work on the power generation system 2.

[0061] Therefore, it is desirable to avoid the operation of the power generation system 2 being biased towards either the engine generator 21 or the fuel cell cogeneration unit 22. Specifically, for example, when the requested output 2a is relatively small, or when the requested output 2a is relatively large, such as when the requested output 2a is a second predetermined value x2 or more, it is preferable to use the engine generator 21 and the fuel cell cogeneration unit 22 separately. From this point of view, as in this embodiment, it is preferable that when the requested output 2a is a second predetermined value x2 or more, the processing unit 1a operates the other of the engine generator 21 and the fuel cell generator FCG (engine generator 21 in this embodiment).

[0062] From the viewpoint of ensuring that the power generation system 2 operates in a manner suitable to the requirements of the power generation system 2 even when the requested output 2a is relatively large, the following structure is preferred. That is, as in this embodiment, it is preferable that when the requested output 2a is a second predetermined value X2 or more, the processing unit 1a operates one of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell generator FCG).

[0063] When the requested output 2a is greater than or equal to the second predetermined value X2, the instructions set by the processing unit 1a are as follows: Specifically, when the requested output 2a is greater than or equal to the second predetermined value X2 and less than or equal to the third predetermined value X3, the processing unit 1a sets the output of the engine generator 21 to the second predetermined value X2. Furthermore, the processing unit 1a sets the output of each fuel cell cogeneration unit 22 to the value obtained by dividing the difference between the requested output 2a and the second predetermined value X2 by the number of fuel cell cogeneration units 22 (2 units in this embodiment).

[0064] In this embodiment, the third predetermined value X3 is set to the value obtained by adding the second predetermined value X2 to the first predetermined value X1, and stored in the storage unit 1b. That is, the third predetermined value X3 is greater than the second predetermined value X2. However, the setting of the third predetermined value X3 is not limited to the above setting.

[0065] Therefore, in this case, the processing unit 1a sets the output of the other of the engine generator 21 and the fuel cell generator FCG (engine generator 21 in this embodiment) to the second predetermined value X2. Additionally, the processing unit 1a sets the output of the other of the engine generator 21 and the fuel cell generator FCG (fuel cell generator FCG in this embodiment) to the difference between the requested output 2a and the second predetermined value X2.

[0066] When the requested output 2a is greater than the third predetermined value X3, the processing unit 1a sets the output of each fuel cell cogeneration unit 22 to the first predetermined value X1. Additionally, the processing unit 1a sets the output of the engine generator 21 to the difference between the requested output 2a and the first predetermined value X1. That is, when the requested output 2a is greater than the third predetermined value X3, the processing unit 1a sets the output of one of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell generator FCG) to the first predetermined value X1. Furthermore, the processing unit 1a sets the output of the other of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the engine generator 21) to the difference between the requested output 2a and the first predetermined value X1.

[0067] As described above, the first predetermined value X1 is set to the same value as the sum of the rated outputs of each fuel cell cogeneration unit 22. Therefore, the sum of the outputs of each fuel cell cogeneration unit 22 is less than or equal to the first predetermined value X1. Furthermore, the second predetermined value X2 is set to the same value as the lower limit output of the engine generator 21. Therefore, the output of the engine generator 21 is greater than or equal to the second predetermined value X2. That is, the output of one of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell generator FCG) is limited to less than or equal to the first predetermined value X1. Furthermore, the output of the other of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the engine generator 21) is limited to greater than or equal to the second predetermined value X2.

[0068] Even with this structure, from the viewpoint of utilizing the output of the power generation system 2 to supply the requested output 2a of a second predetermined value X2 or higher, and prioritizing the operation of either the engine generator 21 or the fuel cell generator FCG, the following structure is preferred. That is, as in this embodiment, when the requested output 2a is a second predetermined value X2 or higher and a third predetermined value X3 (the sum of the first predetermined value X1 and the second predetermined value X2) or lower, the processing unit 1a preferably performs the following settings: The processing unit 1a preferably sets the output of the other of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the engine generator 21) to the second predetermined value X2. Furthermore, the processing unit 1a preferably sets the output of one of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell generator FCG) to the difference between the requested output 2a and the second predetermined value X2.

[0069] Furthermore, when the requested output 2a is greater than the third predetermined value X3, the processing unit 1a preferably performs the following settings: The processing unit 1a preferably sets the output of one of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell generator FCG) to the first predetermined value X1. Additionally, the processing unit 1a preferably sets the output of the other of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the engine generator 21) to the difference between the requested output 2a and the first predetermined value X1.

[0070] [3. Examples of variations in operating modes]

[0071] based on Figure 4 A variation of the operating mode is explained. Figure 4 This is an explanatory diagram illustrating a variation of the operating mode. In Figure 4 The diagram illustrates the allocation of the set output (power generation output) of the power generation system 2 in the modified example relative to the requested output 2a to the power generation system 2. Figure 4 The distribution of the set output in the power generation system 2 shown is different from that when the requested output 2a is greater than or equal to the second specified value X2. Figure 3 The distribution of the set output in the power generation system 2 shown is the same. Therefore, the following explanation will focus on these differences, while the explanation of the similarities will be omitted. Furthermore, regarding... Figure 3 The same elements are labeled with the same reference numerals in the accompanying drawings.

[0072] When the requested output 2a is greater than or equal to the second specified value X2 and less than the fourth specified value X4, the processing unit 1a outputs an operation instruction for the engine generator 21 to the control device 21c and an outputs a stop instruction for each fuel cell cogeneration unit 22 to the integrated controller 23.

[0073] In this embodiment, the fourth predetermined value X4 is set to the same value as the rated output of the engine generator 21 and stored in the storage unit 1b. However, the setting of the fourth predetermined value X4 is not limited to the above setting. Furthermore, as described above, the second predetermined value X2 is set to the same value as the lower limit output of the engine generator 21. Therefore, the fourth predetermined value X4 is greater than the second predetermined value X2.

[0074] Based on the operation instructions output from the processing unit 1a, the control device 21c controls the operation of the engine generator 21, thereby enabling the engine generator 21 to operate. Additionally, based on the operation instructions output from the processing unit 1a, the integrated controller 23 stops the operation of each fuel cell cogeneration unit 22.

[0075] When the requested output 2a is a fourth predetermined value x4 or higher, the processing unit 1a outputs an operation instruction for the engine generator 21 to the control device 21c and an operation instruction for each fuel cell cogeneration unit 22 to the integrated controller 23. Based on the operation instructions output from the processing unit 1a, the control device 21c controls the operation of the engine generator 21, thereby enabling the engine generator 21 to operate. Furthermore, based on the operation instructions output from the processing unit 1a, the integrated controller 23 controls the operation of each fuel cell cogeneration unit 22, thereby enabling each fuel cell cogeneration unit 22 to operate. Therefore, when the requested output 2a is a fourth predetermined value x4 or higher, the processing unit 1a enables one of the engine generator 21 and the fuel cell generator FCG (in this embodiment, the fuel cell generator FCG) to operate.

[0076] As described above, the fourth specified value X4 is set to the same value as the rated output of the engine generator 21. Therefore, the output of the engine generator 21 becomes less than or equal to the fourth specified value X4. That is, the output of the other of the engine generator 21 and the fuel cell generator FCG (in the modified example, the engine generator 21) is limited to less than or equal to the fourth specified value X4. Even with this structure, from the viewpoint of supplying the requested output 2a of the fourth specified value X4 or higher using the output of the power generation system 2, the following structure is preferred. That is, as in the modified example, it is preferable that when the requested output 2a is greater than or equal to the fourth specified value X4, the processing unit 1a operates one of the engine generator 21 and the fuel cell generator FCG (in the modified example, the fuel cell generator FCG).

[0077] When the requested output 2a is 4 or more, the instructions set by the processing unit 1a are as follows: The processing unit 1a sets the output of the engine generator 21 to decrease as the requested output 2a increases. Furthermore, the processing unit 1a sets the output of each fuel cell cogeneration unit 22 to increase as the requested output 2a increases.

[0078] Therefore, when the requested output 2a is a fourth predetermined value x4 or more, as the requested output 2a increases, the processing unit 1a increases the output of one of the engine generator 21 and the fuel cell generator FCG (in a modified example, the fuel cell generator FCG). Conversely, when the requested output 2a is a fourth predetermined value x4 or more, as the requested output 2a increases, the processing unit 1a decreases the output of the other of the engine generator 21 and the fuel cell generator FCG (in a modified example, the engine generator 21).

[0079] As described above, the output of the other of the engine generator 21 and the fuel cell generator FCG (in the modified example, engine generator 21) is limited to a fourth predetermined value X4 or less. Even with this structure, from the viewpoint of supplying the requested output 2a of the fourth predetermined value X4 or more using the output of the power generation system 2, and prioritizing the operation of one of the engine generator 21 and the fuel cell generator FCG, the following structure is preferred. That is, as in the modified example, it is preferable that when the requested output 2a is the fourth predetermined value X4 or more, as the requested output 2a increases, the processing unit 1a increases the output of one of the engine generator 21 and the fuel cell generator FCG (in the modified example, fuel cell generator FCG). Furthermore, when the requested output 2a is the fourth predetermined value X4 or more, as the requested output 2a increases, the processing unit 1a decreases the output of the other of the engine generator 21 and the fuel cell generator FCG (in the modified example, engine generator 21).

[0080] based on Figure 5 Another variation of the operating mode will be explained. Figure 5 This is an explanatory diagram illustrating another variation of the operating mode. In Figure 5 The diagram illustrates the allocation of the set output (power generation output) of the power generation system 2 relative to the requested output 2a to the power generation system 2 in another variation. Figure 5 The allocation of the set output in the power generation system 2 shown differs from that in the cases where the requested output 2a is below the first specified value X1 and in the cases where the requested output 2a is above the fourth specified value X4. Figure 4 The distribution of the set output in the power generation system 2 shown is the same. That is, especially when the requested output 2a is greater than or equal to the second specified value X2, the processing unit 1a operates one of the engine generator 21 and the fuel cell generator FCG (in another variation, the fuel cell generator FCG). Therefore, the following description will focus on these differences, and the description of the similarities will be omitted. In addition, regarding the... Figure 3 or Figure 4 The same elements are labeled with the same reference numerals in the accompanying drawings.

[0081] When the requested output 2a is less than or equal to the first predetermined value X1, the processing unit 1a outputs a stop instruction for the engine generator 21 to the control device 21c and a stop instruction for each fuel cell cogeneration unit 22 to the integrated controller 23. Based on the operation instructions output from the processing unit 1a, the control device 21c stops the operation of the engine generator 21, and the integrated controller 23 stops the operation of each fuel cell cogeneration unit 22. Thus, the operation of both the engine generator 21 and each fuel cell cogeneration unit 22 stops.

[0082] In another variation, when the requested output 2a is between a first predetermined value X1 and a second predetermined value X2, the processing unit 1a stops the operation of both the engine generator 21 and each fuel cell cogeneration unit 22. That is, when the requested output 2a is below the second predetermined value X2, the processing unit 1a in this variation stops the operation of the power generation system 2.

[0083] In power generation system 2 and commercial power system 101 (see reference) Figure 1 In the interconnected structure of the system, load 102 (refer to) is reliably supplied. Figure 1 From the viewpoint of meeting the power requirements of the power generation system 2 and suppressing its deterioration, the following structure is preferred. That is, as in another variation, it is preferable that when the requested output 2a is less than or equal to a second predetermined value X2, the processing unit 1a stops the operation of the power generation system 2.

[0084] When the requested output 2a is a fourth predetermined value X4 or higher, the processing unit 1a outputs an operation instruction for the engine generator 21 to the control device 21c and an operation instruction for each fuel cell cogeneration unit 22 to the integrated controller 23. Based on the operation instructions output from the processing unit 1a, the control device 21c controls the operation of the engine generator 21, thereby enabling the engine generator 21 to operate. Additionally, based on the operation instructions output from the processing unit 1a, the integrated controller 23 controls the operation of each fuel cell cogeneration unit 22, thereby enabling each fuel cell cogeneration unit 22 to operate. That is, when the requested output 2a is a fourth predetermined value X4 or higher than the second predetermined value X2, the processing unit 1a enables the other of the engine generator 21 and the fuel cell generator FCG (in another variation, the engine generator 21) to operate. Furthermore, when the requested output 2a is a fourth predetermined value X4 or higher, the processing unit 1a enables the other of the engine generator 21 and the fuel cell generator FCG (in another variation, the fuel cell generator FCG) to operate.

[0085] In a configuration where the requested output 2a is greater than or equal to a second predetermined value X2, the engine generator 21 and the fuel cell generator FCG are operated. From the viewpoint of reliably supplying a relatively large requested output 2a using the output of the power generation system 2, the following configuration is preferred. That is, as in another variation, it is preferable that when the requested output 2a is greater than or equal to a fourth predetermined value X4, which is greater than the second predetermined value X2, the processing unit 1a operates the other of the engine generator 21 and the fuel cell generator FCG (engine generator 21 in another variation).

[0086] Even in a configuration where the output of the other of the generator 21 and the fuel cell generator FCG (in a modified example, the generator 21) is limited to a fourth predetermined value X4 or less, it is preferable to use the output of the power generation system 2 to supply the requested output 2a that is greater than or equal to the fourth predetermined value X4. From this point of view, as in another modified example, it is preferable that when the requested output 2a is greater than or equal to the fourth predetermined value X4, the processing unit 1a operates one of the generator 21 and the fuel cell generator FCG (in a modified example, the fuel cell generator FCG).

[0087] When the requested output 2a is a fourth predetermined value X4 or higher, the instructions set by the processing unit 1a are as follows: Specifically, when the requested output 2a is a fourth predetermined value X4 or higher, the processing unit 1a sets the output of the engine generator 21 to the fourth predetermined value X4. Furthermore, the processing unit 1a sets the output of each fuel cell cogeneration unit 22 to the value obtained by dividing the difference between the requested output 2a and the fourth predetermined value X4 by the number of fuel cell cogeneration units 22 (2 units in this embodiment).

[0088] Therefore, in this case, the processing unit 1a sets the output of the other of the engine generator 21 and the fuel cell generator FCG (in another variation, the engine generator 21) to the fourth predetermined value X4. Additionally, the processing unit 1a sets the output of the other of the engine generator 21 and the fuel cell generator FCG (in another variation, the fuel cell generator FCG) to the difference between the requested output 2a and the fourth predetermined value X4.

[0089] Even in a structure where the output of the other of the engine generator 21 and the fuel cell generator FCG is limited to a fourth predetermined value X4 or less, from the viewpoint of reliably supplying the requested output 2a that is greater than or equal to the fourth predetermined value X4 using the output of the power generation system 2, the following structure is preferred. That is, when the requested output 2a is greater than or equal to the fourth predetermined value X4, it is preferable that the processing unit 1a sets the output of the other of the engine generator 21 and the fuel cell generator FCG to the fourth predetermined value X4. Furthermore, when the requested output 2a is greater than or equal to the fourth predetermined value X4, it is preferable that the processing unit 1a sets the output of one of the engine generator 21 and the fuel cell generator FCG to the difference between the requested output 2a and the fourth predetermined value X4.

[0090] [4. Supplement]

[0091] In this embodiment, the structure in which the operation plan of the power generation system 2 is input from the power generation company (specifically, the power generation company's operators) to the operation management device 1 via the power generation company's communication terminal device PP1 is described (see reference). Figure 1 However, it is not limited to this. For example, it could also be a structure where the operation plan of power generation system 2 is input into operation management device 1 by power generation enterprise system PP2. More details are as follows. Figure 6 This is an explanatory diagram illustrating a modified example of the connection between the operation management device 1 and the power generation enterprise system PP2. Figure 6 The block diagram shown omits the communication terminal device PP1, and clarifies that the operation management device 1 and the power generation enterprise system PP2 can be directly and communicatively connected. Figure 1 The block diagram shown is the same. Furthermore, communication between the operation management device 1 and the power generation enterprise system PP2 can also be achieved, for example, via Modbus communication, BACnet communication, etc.

[0092] If it is this structure, then Figure 2 In step S1, the operation plan of the power generation system 2 in the processing unit 1a is obtained by outputting the operation plan of the power generation system 2 to the operation management device 1 from the power generation enterprise system PP2. As a result, the operation of the communication terminal device PP1 is at least eliminated, and the operation efficiency of the power generation enterprise is improved.

[0093] In this embodiment, a combined heat and power (CHP) device with waste heat recovery (utilization) function is used as an example for the description of the fuel cell generator (FCG), but the fuel cell generator (FCG) is not limited to a CHP device. For example, the fuel cell generator (FCG) may also be a single power generation device that removes the waste heat recovery function and only has the function of power generation.

[0094] In this embodiment, the operation mode of the power generation system 2 based on the power generation efficiency of each fuel cell cogeneration unit 22 has been described, but it is not limited thereto. For example, the operation mode of the power generation system 2 may also be based on the overall efficiency, including the effect of waste heat recovery from each fuel cell cogeneration unit 22. Furthermore, if the power generation system 2 is a structure that includes a hydrogen engine cogeneration unit, then the operation mode of the power generation system 2 may also be based on the overall efficiency, including the effect of waste heat recovery from the hydrogen engine cogeneration unit.

[0095] [5. Postscript]

[0096] The operation management device 1 described in this embodiment can also be the operation management device shown in the following notes.

[0097] The operation management device in Appendix (1) is an operation management device that manages the operation of a power generation system equipped with an engine generator and a fuel cell generator.

[0098] The system includes a processing unit that, when the requested output from the power generation system is below a first predetermined value, enables one of the engine generator and the fuel cell generator to operate.

[0099] The operation management device in Appendix (2) is based on the operation management device described in Appendix (1).

[0100] If the requested output is greater than or equal to a second specified value that is greater than the first specified value, the processing unit causes the other of the engine generator and the fuel cell generator to operate.

[0101] The operation management device in Appendix (3) is based on the operation management device described in Appendix (2).

[0102] When the above-mentioned request output is greater than or equal to the second specified value, the above-mentioned processing unit causes one of the above-mentioned engine generator and the above-mentioned fuel cell generator to operate.

[0103] The operation management device in Appendix (4) is based on the operation management device described in Appendix (3).

[0104] When the processing unit outputs a request that is greater than or equal to the second specified value and less than or equal to the third specified value,

[0105] The output of the other of the aforementioned engine generator and fuel cell generator is set to the aforementioned second specified value.

[0106] The output of one of the aforementioned engine generator and the aforementioned fuel cell generator is set to the difference between the requested output and the aforementioned second specified value.

[0107] The operation management device in Appendix (5) is based on the operation management device described in Appendix (4).

[0108] If the processing unit outputs a request that exceeds the third specified value,

[0109] The output of one of the aforementioned engine generator and the aforementioned fuel cell generator is set to the aforementioned first predetermined value.

[0110] The output of the other of the aforementioned engine generator and fuel cell generator is set to the difference between the requested output and the aforementioned first specified value.

[0111] The operation management device in Appendix (6) is based on the operation management device described in any of Appendix (2) to (5).

[0112] The aforementioned power generation system is interconnected with the commercial power system.

[0113] If the requested output is between the first specified value and the second specified value, the processing unit stops the operation of the power generation system.

[0114] The operation management device in Appendix (7) is an operation management device that manages the operation of a power generation system equipped with an engine generator and a fuel cell generator.

[0115] The system includes a processing unit that, when the requested output from the power generation system is a second predetermined value or higher, causes one of the engine generator and the fuel cell generator to operate.

[0116] The operation management device in Appendix (8) is based on the operation management device described in Appendix (7).

[0117] The aforementioned power generation system is interconnected with the commercial power system.

[0118] If the requested output is below the second specified value, the processing unit stops the operation of the power generation system.

[0119] The operation management device in Appendix (9) is based on the operation management device described in Appendix (7) or (8).

[0120] If the above-mentioned request output is a fourth specified value or greater than the second specified value, the above-mentioned processing unit causes the other of the above-mentioned engine generator and the above-mentioned fuel cell generator to operate.

[0121] The operation management device in Appendix (10) is based on the operation management device described in Appendix (9).

[0122] When the above-mentioned request output is greater than or equal to the fourth specified value, the above-mentioned processing unit causes one of the above-mentioned engine generator and the above-mentioned fuel cell generator to operate.

[0123] The operation management device in Appendix (11) is based on the operation management device described in Appendix (2).

[0124] If the requested output is a fourth specified value or greater than the second specified value, the processing unit causes one of the engine generator and the fuel cell generator to operate.

[0125] The operation management device in Appendix (12) is based on the operation management device described in Appendix (10) or (11).

[0126] When the output of the above-mentioned request is greater than or equal to the fourth specified value, the processing unit shall...

[0127] The output of the other of the aforementioned engine generator and fuel cell generator is set to the aforementioned fourth specified value.

[0128] The output of one of the aforementioned engine generator and the aforementioned fuel cell generator is set to the difference between the requested output and the aforementioned fourth specified value.

[0129] The operation management device in Appendix (13) is based on the operation management device described in Appendix (10) or (11).

[0130] When the requested output is greater than or equal to the fourth specified value, the processing unit will increase the value of the requested output as the requested output increases.

[0131] This increases the output of either the aforementioned engine generator or the aforementioned fuel cell generator.

[0132] This reduces the output of the other of the aforementioned engine generator and fuel cell generator.

[0133] The operation management device in Appendix (14) is based on the operation management device described in any of Appendix (1) to (13).

[0134] The aforementioned fuel cell generator includes a fuel cell cogeneration unit capable of recovering waste heat generated during power generation.

[0135] The operation management device in Appendix (15) is based on the operation management device described in any of Appendix (1) to (14).

[0136] The aforementioned power generation system includes multiple of the aforementioned fuel cell generators.

[0137] The aforementioned processing unit uniformly sets the output of each of the aforementioned fuel cell generators.

[0138] The embodiments of the present invention have been described above, but the scope of the present invention is not limited thereto, and it can be implemented by extension or modification without departing from the spirit of the invention. Furthermore, the various embodiments and modifications shown in this specification can be combined in any possible way.

[0139] [Industry Applicability]

[0140] This invention can be used, for example, as an operation management device for industrial and household power generation systems.

Claims

1. An operation management device for managing the operation of a power generation system comprising an engine generator and a fuel cell generator, characterized in that, The system includes a processing unit that, when the requested output for the power generation system is below a first predetermined value, causes one of the engine generator and the fuel cell generator to operate.

2. The operation management device according to claim 1, characterized in that, If the requested output is greater than or equal to a second predetermined value that is greater than the first predetermined value, the processing unit causes the other of the engine generator and the fuel cell generator to operate.

3. The operation management device according to claim 2, characterized in that, When the requested output is greater than or equal to the second specified value, the processing unit causes one of the engine generator and the fuel cell generator to operate.

4. The operation management device according to claim 3, characterized in that, When the processing unit receives a request output that is above the second specified value and below a third specified value that is greater than the second specified value, the processing unit will... The output of the other of the engine generator and the fuel cell generator is set to the second predetermined value. The output of one of the engine generator and the fuel cell generator is set to the difference between the requested output and the second specified value.

5. The operation management device according to claim 4, characterized in that, When the processing unit receives a request output greater than the third specified value... The output of one of the engine generator and the fuel cell generator is set to the first predetermined value. The output of the other of the engine generator and the fuel cell generator is set to the difference between the requested output and the first specified value.

6. The operation management device according to claim 2, characterized in that, The power generation system is interconnected with the commercial power system. If the requested output is between the first specified value and the second specified value, the processing unit stops the operation of the power generation system.

7. An operation management device for managing the operation of a power generation system comprising an engine generator and a fuel cell generator, characterized in that, The system includes a processing unit that, when the requested output from the power generation system is greater than or equal to a second predetermined value, causes one of the engine generator and the fuel cell generator to operate.

8. The operation management device according to claim 7, characterized in that, The power generation system is interconnected with the commercial power system. If the requested output is below the second specified value, the processing unit stops the operation of the power generation system.

9. The operation management device according to claim 7, characterized in that, If the requested output is a fourth specified value greater than the second specified value, the processing unit causes the other of the engine generator and the fuel cell generator to operate.

10. The operation management device according to claim 9, characterized in that, When the requested output is greater than or equal to the fourth specified value, the processing unit causes one of the engine generator and the fuel cell generator to operate.

11. The operation management device according to claim 2, characterized in that, If the requested output is a fourth predetermined value greater than the second predetermined value, the processing unit causes one of the engine generator and the fuel cell generator to operate.

12. The operation management device according to claim 10, characterized in that, When the processing unit receives a request output that is greater than or equal to the fourth predetermined value, The output of the other of the engine generator and the fuel cell generator is set to the fourth predetermined value. The output of one of the engine generator and the fuel cell generator is set to the difference between the requested output and the fourth specified value.

13. The operation management device according to claim 10, characterized in that, When the request output is greater than or equal to the fourth predetermined value, the processing unit, as the request output increases, This increases the output of one of the engine generator and the fuel cell generator. This reduces the output of the other of the engine generator and the fuel cell generator.

14. The operation management device according to claim 1, characterized in that, The fuel cell generator includes a fuel cell cogeneration unit capable of recovering waste heat generated during power generation.

15. The operation management device according to any one of claims 1 to 14, characterized in that, The power generation system includes multiple fuel cell generators. The processing unit uniformly sets the output of each fuel cell generator.

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