Power generation system

Abstract

This technology provides a way to equalize the maintenance frequency of intake filters across multiple fuel cell systems. [Solution] The power generation system comprises a plurality of fuel cell systems connected in parallel, and a management device that transmits the requested power generation amount to each of the plurality of fuel cell systems. Each of the plurality of fuel cell systems comprises a fuel cell, an intake filter, and a control device. The control device is configured to transmit a degree of blockage, which indicates the degree of blockage of the intake filter, to the management device. The management device is capable of performing a process to determine the requested power generation amount for each of the plurality of fuel cell systems based on the degree of blockage transmitted from the plurality of fuel cell systems. In the process of determining the requested power generation amount, the requested power generation amount for each of the plurality of fuel cell systems is determined such that the more blocked the intake filter of the fuel cell system, the smaller the requested power generation amount.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a power generation system.

Background Art

[0002] Patent Document 1 discloses a power generation system including a plurality of fuel cell systems connected in parallel and a management device that transmits a required power generation amount to each of the plurality of fuel cell systems.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Generally, a fuel cell system includes an intake filter that collects foreign substances from the air supplied to the fuel cell. The intake filter requires maintenance (e.g., replacement or cleaning) when a certain amount of foreign substances is collected. When there are a plurality of fuel cell systems, the amount of foreign substances collected by the intake filter may vary depending on the installation location of each fuel cell system. That is, among the plurality of fuel cell systems, there may be a mixture of those in which the intake filter clogs early and those in which it does not. In this case, in a specific fuel cell system, the maintenance frequency of the intake filter becomes high.

[0005] This specification provides a technique for equalizing the maintenance frequency of intake filters among a plurality of fuel cell systems.

Means for Solving the Problems

[0006] In a first aspect disclosed herein, the power generation system may include a plurality of fuel cell systems connected in parallel, and a control device that transmits a requested power generation amount to each of the plurality of fuel cell systems. Each of the plurality of fuel cell systems may include a fuel cell, an intake filter for collecting foreign matter from the air supplied to the fuel cell, and a control device that controls the power generation operation of the fuel cell based on the requested power generation amount transmitted from the control device. The control device may be configured to transmit a degree of blockage indicating the degree of blockage of the intake filter to the control device. The control device can perform a process to determine the requested power generation amount for each of the plurality of fuel cell systems based on the degree of blockage transmitted from the plurality of fuel cell systems, and in the process of determining the requested power generation amount, the requested power generation amount for each of the plurality of fuel cell systems may be determined such that the requested power generation amount is smaller for fuel cell systems with a greater degree of blockage of the intake filter.

[0007] The greater the power generation requirement, the greater the amount of air supplied to the fuel cell. And the greater the amount of air supplied to the fuel cell, the greater the amount of foreign matter collected by the intake filter. In the above configuration, the greater the degree of blockage, the smaller the power generation requirement. In this case, the amount of air supplied to the fuel cell equipped with a highly blocked intake filter decreases. Therefore, the amount of foreign matter collected by that intake filter decreases. As a result, the difference in the degree of blockage between multiple intake filters decreases. Consequently, the maintenance frequency of intake filters can be equalized among multiple fuel cell systems.

[0008] In a second embodiment, in the process of determining the requested power generation amount in the first embodiment, the requested power generation amount for each of the plurality of fuel cell systems may be determined such that the sum of the requested power generation amounts for each of the plurality of fuel cell systems is equal to the standard power generation amount that the plurality of fuel cell systems should generate.

[0009] According to the above configuration, the maintenance frequency of intake filters can be equalized among multiple fuel cell systems, and the amount of power generated by the multiple fuel cell systems can be maintained at the baseline power generation amount.

[0010] In a third embodiment, in the process of determining the requested power generation amount in the second embodiment, the requested power generation amount for each of the plurality of fuel cell systems may be determined such that the requested power generation amount for each of the plurality of fuel cell systems does not exceed the upper limit power generation amount for that fuel cell system.

[0011] According to the above configuration, it is possible to prevent the transmission of a power generation request exceeding the upper limit to the fuel cell system.

[0012] In a fourth embodiment, in the first embodiment, the management device may selectively execute a first mode and a second mode as the process for determining the requested power generation amount. The first mode may include: a first process for determining the requested power generation amount for each of the plurality of fuel cell systems such that the requested power generation amount decreases for fuel cell systems with a greater degree of blockage of the intake filter; a second process for correcting the requested power generation amount determined in the first process so that the requested power generation amount for each of the plurality of fuel cell systems does not exceed the upper limit power generation amount for that fuel cell system; and a third process for correcting the requested power generation amount determined in the second process so that the total power generation amount of the requested power generation amounts for each of the plurality of fuel cell systems is equal to the reference power generation amount that the plurality of fuel cell systems should generate. The second mode may include the first process and the second process, but may not include the third process.

[0013] In the first mode, priority is given to the total power generated by multiple fuel cell systems becoming the baseline power generation, while in the second mode, priority is given to equalizing the maintenance frequency of intake filters among the multiple fuel cell systems. With the above configuration, the user can choose whether to prioritize the total power generated by multiple fuel cell systems becoming the baseline power generation, or to prioritize equalizing the maintenance frequency of intake filters among the multiple fuel cell systems.

[0014] In a fifth embodiment, in any one of the first to fourth embodiments, each of the plurality of fuel cell systems may further include a first pressure sensor for detecting a first pressure, which is the pressure of the air before it passes through the intake filter, and a second pressure sensor for detecting a second pressure, which is the pressure of the air after it has passed through the intake filter. The control device of the plurality of fuel cell systems may use the first pressure and the second pressure to calculate the degree of blockage.

[0015] With the above configuration, the degree of blockage of the intake filter can be calculated with a relatively simple setup. [Brief explanation of the drawing]

[0016] [Figure 1] This is a schematic diagram of power generation system 2. [Figure 2] This is a flowchart of the detection process. [Figure 3] This is a flowchart of the command processing. [Figure 4] This diagram shows an example of a case where the first to fourth power generation amounts fall below the upper limit power generation amount. [Figure 5] This figure shows an example of a case in output priority mode where the second to fourth power generation amounts exceed the upper limit power generation amount. [Figure 6] This figure shows an example of a case in maintainability priority mode where the second to fourth power generation amounts exceed the upper limit power generation amount. [Modes for carrying out the invention]

[0017] The power generation system 2 shown in FIG. 1 includes a first fuel cell system 10A to a fourth fuel cell system 10D and a management device 30. Hereinafter, the first fuel cell system 10A to the fourth fuel cell system 10D may be collectively referred to as the "fuel cell system 10". The fuel cell system 10 is a stationary fuel cell system. As an example, the fuel cell system 10 is installed outdoors such as at a construction site or a mining site. The fuel cell systems 10 are connected in parallel.

[0018] The fuel cell system 10 includes a fuel cell 12, an intake filter 14, a first pressure sensor 16, a second pressure sensor 18, and a control device 20. Compressed air is supplied to the fuel cell 12 from an air compressor (not shown), and hydrogen gas is supplied to the fuel cell 12 from a hydrogen gas tank (not shown). The fuel cell 12 generates power by reacting oxygen and hydrogen. The intake filter 14 collects foreign matters contained in the air inhaled into the fuel cell 12. As an example, the foreign matters are sand, dust, and dirt. The first pressure sensor 16 detects a first pressure that is the pressure of the air before passing through the intake filter 14. The second pressure sensor 18 detects a second pressure that is the pressure of the air after passing through the intake filter 14.

[0019] The control device 20 includes a CPU and a memory such as a ROM and a RAM. The control device 20 controls the operations of the components of the fuel cell system 10.

[0020] The management device 30 includes a CPU and a memory such as a ROM and a RAM. The management device 30 manages the reference power generation amount that the fuel cell system 10 should generate. In the command processing (see FIG. 3) described later, the management device 30 determines the required power generation amounts for the first fuel cell system 10A to the fourth fuel cell system 10D, and transmits the determined required power generation amounts to the first fuel cell system 10A to the fourth fuel cell system 10D respectively. Hereinafter, the required power generation amounts corresponding to the first fuel cell system 10A, the second fuel cell system 10B, the third fuel cell system 10C, and the fourth fuel cell system 10D are described as the "first required power generation amount", the "second required power generation amount", the "third required power generation amount", and the "fourth required power generation amount", respectively. The control devices 20 of the first fuel cell system 10A to the fourth fuel cell system 10D control the power generation operation by the fuel cell 12 based on the required power generation amount transmitted from the management device 30. The management device 30 can selectively execute an output priority mode and a maintenance priority mode. The output priority mode is a mode in which the first required power generation amount to the fourth required power generation amount are determined so that the total power generation amount (hereinafter referred to as the "total power generation amount") of the first required power generation amount to the fourth required power generation amount becomes the reference power generation amount. The maintenance priority mode is a mode in which the first required power generation amount to the fourth required power generation amount are determined so that the maintenance frequency of the intake filter 14 is leveled among the first fuel cell system 10A to the fourth fuel cell system 10D. Note that the output priority mode is a mode in which it is not permitted for the total power generation amount to be less than the reference power generation amount, and it can also be said that the maintenance priority mode is a mode in which it is permitted for the total power generation amount to be less than the reference power generation amount. The user can select the mode in which the management device 30 operates by operating an operation unit (not shown) of the management device 30 or the like.

[0021] (Detection process; FIG. 2) Referring to FIG. 2, the detection process executed by the control device 20 of the first fuel cell system 10A will be described. The control device 20 executes the process of FIG. 2 in a state where air is being inhaled from the outside.

[0022] In S10, the control device 20 calculates the degree of blockage of the intake filter 14 of the first fuel cell system 10A. The control device 20 uses the first pressure detected by the first pressure sensor 16 and the second pressure detected by the second pressure sensor 18 to calculate the pressure loss of the intake filter 14. Next, the control device 20 uses the calculated pressure loss to calculate the degree of blockage of the intake filter 14. For example, the control device 20 uses the pressure loss when no foreign matter is attached to the intake filter 14 and the current pressure loss to calculate the degree of blockage of the intake filter 14. In a modified example, the control device 20 may store information showing the relationship between the pressure loss and the degree of blockage of the intake filter 14, and the control device 20 may use this information and the current pressure loss to calculate the degree of blockage of the intake filter 14.

[0023] In S12, the control device 20 transmits the degree of blockage calculated in S10 to the management device 30. When S12 is completed, the control device 20 returns to S10. The control device 20 may execute S10 if a predetermined time has elapsed since the completion of S12.

[0024] The detection process performed by the control device 20 of the first fuel cell system 10A has been described, but the control devices 20 of the second fuel cell systems 10B to the fourth fuel cell systems 10D are also configured to perform the detection process. Hereinafter, the degree of blockage corresponding to the first fuel cell system 10A, the second fuel cell system 10B, the third fuel cell system 10C, and the fourth fuel cell system 10D will be referred to as "first degree of blockage," "second degree of blockage," "third degree of blockage," and "fourth degree of blockage," respectively.

[0025] (Instruction processing; Figure 3) Referring to Figure 3, the command processing performed by the control device 30 will be described. The control device 30 performs command processing using the first to fourth blockage levels received from the first fuel cell system 10A to the fourth fuel cell system 10D.

[0026] In S40, the control device 30 determines the reference power generation amount.

[0027] In S42, the control device 30 uses the first to fourth degree of blockage to calculate the first to fourth power generation coefficients corresponding to the first to fourth fuel cell systems 10A to the fourth fuel cell systems 10D. The control device 30 determines the first to fourth power generation coefficients such that a smaller degree of blockage, as indicated by the degree of blockage, corresponds to a larger power generation coefficient. The control device 30 also determines the first to fourth power generation coefficients such that the sum of the first to fourth power generation coefficients equals a predetermined value. For example, the predetermined value is the number of fuel cell systems 10, which in this embodiment is "4".

[0028] In S44, the control device 30 calculates the first to fourth required power generation amounts using the reference power generation amount identified in S40 and the first to fourth power generation coefficients calculated in S42. First, the control device 30 calculates the individual reference power generation amount by dividing the reference power generation amount identified in S40 by the number of fuel cell systems 10 (4 in this embodiment). Next, the control device 30 calculates the first to fourth required power generation amounts by multiplying the individual reference power generation amount by each of the first to fourth power generation coefficients. As a result, the more blocked the intake filter 14 is in a fuel cell system, the smaller the required power generation amount will be. Hereafter, S40, S42, and S44 may be collectively referred to as the "calculation process".

[0029] In S50, the control device 30 determines whether or not the output priority mode is selected. If the output priority mode is selected (YES in S50), the control device 30 proceeds to S60. On the other hand, if the output priority mode is not selected, i.e., if the maintainability priority mode is selected (NO in S50), the control device 30 proceeds to S70.

[0030] In S60, the control device 30 determines whether the first to fourth requested power generation amounts calculated in the calculation process include a requested power generation amount that exceeds the upper limit power generation amount of the fuel cell system 10. If the first to fourth requested power generation amounts do not include a requested power generation amount that exceeds the upper limit power generation amount (NO in S60) (see Figure 4), the control device 30 proceeds to S62. On the other hand, if the first to fourth requested power generation amounts include a requested power generation amount that exceeds the upper limit power generation amount (YES in S60) (see Figure 5), the control device 30 proceeds to S64.

[0031] In S62, the control device 30 transmits the first to fourth requested power generation amounts calculated in the calculation process to the first to fourth fuel cell systems 10A to 10D. When S62 is completed, the control device 30 returns to S40.

[0032] Furthermore, in S64, the management device 30 corrects the first to fourth requested power generation amounts so that the first to fourth requested power generation amounts are less than or equal to the upper limit power generation amount and the total power generation amount is equal to the standard power generation amount. Specifically, the management device 30 performs a first correction process to correct the first to fourth requested power generation amounts calculated in the calculation process so that the first to fourth requested power generation amounts calculated in the calculation process are less than or equal to the upper limit power generation amount, and a second correction process to correct the first to fourth requested power generation amounts corrected in the first correction process so that the total power generation amount is equal to the standard power generation amount. In the first correction process, the corrected power generation amount is subtracted from the requested power generation amount so that any requested power generation amount exceeding the upper limit power generation amount is less than or equal to the upper limit power generation amount. In the second correction process, the corrected power generation amount is added to any other requested power generation amounts that are less than or equal to the upper limit power generation amount. The management device 30 corrects the requested power generation amounts so that the relative magnitudes of the first to fourth requested power generation amounts calculated in the calculation process are maintained. Referring to Figure 5, the case where the first requested power generation amount is less than or equal to the upper limit power generation amount, and the second to fourth requested power generation amounts exceed the upper limit power generation amount will be explained. In this case, in the first correction process, the corrected power generation amount is subtracted from the second to fourth requested power generation amounts so that the second to fourth requested power generation amounts are less than or equal to the upper limit power generation amount. Then, in the second correction process, the corrected power generation amount is added to the first requested power generation amount. As a result, the first to fourth requested power generation amounts become less than or equal to the upper limit power generation amount, and the total power generation amount becomes the standard power generation amount.

[0033] In S66 of Figure 3, the control device 30 transmits the first to fourth requested power generation amounts, which were corrected in S64, to the first to fourth fuel cell systems 10A and 10D. When S66 is completed, the control device 30 returns to S40.

[0034] Furthermore, if NO is determined in S50, the control device 30 executes S70. S70 is the same as S60. If NO is determined in S70, the control device 30 proceeds to S72, and if YES is determined in S70, it proceeds to S74. S72 is the same as S62.

[0035] In S74, the management device 30 corrects the first to fourth requested power generation amounts so that they are less than or equal to the upper limit power generation amount. Specifically, the management device 30 performs the first correction process but does not perform the second correction process. Referring to Figure 6, the case where the first requested power generation amount is less than or equal to the upper limit power generation amount and the second to fourth requested power generation amounts exceed the upper limit power generation amount will be explained. In this case, the first correction process subtracts the corrected power generation amount from the second to fourth requested power generation amounts so that they are less than or equal to the upper limit power generation amount. In S74, since the second correction process is not performed, the corrected power generation amount is not added to the first requested power generation amount. As a result, the first to fourth requested power generation amounts are less than or equal to the upper limit power generation amount. Note that since the corrected power generation amount is not added to the first requested power generation amount, the total power generation amount will be less than the standard power generation amount. Thus, when the control device 30 is operating in maintainability priority mode, the total power generation may fall below the standard power generation amount.

[0036] In S76, the control device 30 transmits the first to fourth requested power generation amounts, which were corrected in S74, to the first to fourth fuel cell systems 10A to 10D. When S76 is completed, the control device 30 returns to S40.

[0037] (Effects of this embodiment) As described above, the power generation system 2 comprises a plurality of fuel cell systems 10 connected in parallel, and a management device 30 that transmits the requested power generation amount to each of the plurality of fuel cell systems 10. Each of the plurality of fuel cell systems 10 comprises a fuel cell 12, an intake filter 14 that collects foreign matter from the air supplied to the fuel cell 12, and a control device 20 that controls the power generation operation by the fuel cell 12 based on the requested power generation amount transmitted from the management device 30. The control device 20 is configured to transmit a degree of blockage indicating the degree of blockage of the intake filter 14 to the management device 30 (S12 in Figure 2). The management device 30 is capable of performing command processing (an example of "processing that determines the requested power generation amount for each of the plurality of fuel cell systems 10 based on the degree of blockage transmitted from the plurality of fuel cell systems 10") (Figure 3). In the command processing, the requested power generation amount for each of the plurality of fuel cell systems 10 is determined such that the requested power generation amount decreases for fuel cell systems 10 with a greater degree of blockage of the intake filter 14.

[0038] The greater the power generation requirement, the greater the amount of air supplied to the fuel cell 12. And the greater the amount of air supplied to the fuel cell 12, the greater the amount of foreign matter collected by the intake filter 14. With the above configuration, the greater the degree of blockage, the smaller the power generation requirement. In this case, the amount of air supplied to the fuel cell 12 equipped with the intake filter 14 with a high degree of blockage decreases. Therefore, the amount of foreign matter collected by the intake filter 14 decreases. As a result, the difference in the degree of blockage between multiple intake filters 14 decreases. Consequently, the maintenance frequency of the intake filters 14 can be equalized among multiple fuel cell systems 10.

[0039] Furthermore, in the command processing, the required power generation amount for each of the multiple fuel cell systems 10 is determined such that the total power generation amount for each of the multiple fuel cell systems 10 is equal to the standard power generation amount that the multiple fuel cell systems 10 should generate (S44, S64).

[0040] According to the above configuration, the maintenance frequency of the intake filter 14 can be equalized among the multiple fuel cell systems 10, and the amount of power generated by the multiple fuel cell systems 10 can be maintained at the standard amount of power generated.

[0041] Furthermore, in the command processing, the required power generation amount for each of the multiple fuel cell systems 10 is determined so that the required power generation amount for each of the multiple fuel cell systems 10 does not exceed the upper limit power generation amount of the fuel cell system 10 (S44).

[0042] According to the above configuration, it is possible to prevent the transmission of a power generation request exceeding the upper limit to the fuel cell system 10.

[0043] Furthermore, the management device 30 can selectively execute an output priority mode (an example of the "first mode") and a maintainability priority mode (an example of the "second mode") as the process for determining the required power generation amount. The output priority mode includes a calculation process (an example of the "first process") (S40-S44) that determines the required power generation amount for each of the multiple fuel cell systems 10 such that the required power generation amount decreases for fuel cell systems 10 with a greater degree of blockage of the intake filter 14; a first correction process (an example of the "second process") (S64, S74) that corrects the required power generation amount determined in the calculation process so that the required power generation amount for each of the multiple fuel cell systems 10 does not exceed the upper limit power generation amount of that fuel cell system 10; and a second correction process (an example of the "third process") (S64) that corrects the required power generation amount determined in the first correction process so that the total power generation amount of the required power generation amounts for each of the multiple fuel cell systems 10 is equal to the standard power generation amount that the multiple fuel cell systems 10 should generate. The maintainability priority mode includes the calculation process and the first correction process, but does not include the second correction process.

[0044] In output priority mode, priority is given to ensuring that the total power generated by the multiple fuel cell systems 10 becomes the standard power generation amount, while in maintainability priority mode, priority is given to equalizing the maintenance frequency of the intake filter 14 among the multiple fuel cell systems 10. According to the above configuration, the user can choose whether to prioritize ensuring that the total power generated by the multiple fuel cell systems 10 becomes the standard power generation amount, or to prioritize equalizing the maintenance frequency of the intake filter 14 among the multiple fuel cell systems 10.

[0045] Furthermore, each of the multiple fuel cell systems 10 is further equipped with a first pressure sensor 16 that detects a first pressure, which is the pressure of the air before it passes through the intake filter 14, and a second pressure sensor 18 that detects a second pressure, which is the pressure of the air after it has passed through the intake filter 14. The control device 20 of the fuel cell system 10 uses the first pressure and the second pressure to calculate the degree of blockage (S10 in Figure 2).

[0046] According to the above configuration, the degree of blockage of the intake filter 14 can be calculated with a relatively simple setup.

[0047] Although embodiments have been described in detail above, these are merely illustrative and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes to the specific examples illustrated above.

[0048] (First modified example) The control device 30 may be capable of operating only in either the output priority mode or the maintainability priority mode.

[0049] (Second Modification) If the management device 30 identifies a requested power generation amount that exceeds the upper limit power generation amount, it may transmit the requested power generation amount to the fuel cell system 10 without correction. In this modification, the fuel cell system 10, upon receiving the requested power generation amount, controls its power generation operation so that the power generation amount becomes the upper limit power generation amount.

[0050] (Third Modification) In the embodiment, the management device 30 corrects only the requested power generation amount that exceeds the upper limit power generation amount when operating in maintainability priority mode. In the modification, the management device 30 may correct the first to fourth requested power generation amounts when it is determined that YES is true at S60 in Figure 3. For example, the management device 30 multiplies the other requested power generation amounts by a coefficient obtained by multiplying the requested power generation amount that exceeds the upper limit power generation amount by the upper limit power generation amount so that it becomes less than or equal to the upper limit power generation amount.

[0051] (Fourth modified example) The fuel cell system 10 may use a current sensor, a differential pressure gauge, a camera, etc., to calculate the degree of blockage of the intake filter 14.

[0052] The technical elements described herein or in the drawings demonstrate technical usefulness individually or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technologies illustrated herein or in the drawings can achieve multiple objectives simultaneously, and achieving even one of these objectives constitutes technical usefulness in itself. [Explanation of symbols]

[0053] 2: Power generation system, 10: Fuel cell system, 10A: First fuel cell system, 10B: Second fuel cell system, 10C: Third fuel cell system, 10D: Fourth fuel cell system, 12: Fuel cell, 14: Intake filter, 16: First pressure sensor, 18: Second pressure sensor, 20: Control device, 30: Management device

Claims

1. It is a power generation system, Multiple fuel cell systems connected in parallel, A management device that transmits the requested power generation amount to each of the aforementioned multiple fuel cell systems, Equipped with, Each of the aforementioned plurality of fuel cell systems is Fuel cells and An intake filter for collecting foreign matter from the air supplied to the fuel cell, The system includes a control device that controls the power generation operation of the fuel cell based on the requested power generation amount transmitted from the management device, The control device is configured to transmit a degree of blockage indicating the degree of blockage of the intake filter to the management device. The management device is capable of performing a process to determine the required power generation amount for each of the multiple fuel cell systems based on the degree of blockage transmitted from the multiple fuel cell systems. In the process of determining the requested power generation amount, the requested power generation amount for each of the plurality of fuel cell systems is determined such that the requested power generation amount decreases for fuel cell systems where the degree of blockage of the intake filter is greater. Power generation system.

2. The power generation system according to claim 1, wherein in the process of determining the requested power generation amount, the requested power generation amount for each of the plurality of fuel cell systems is determined such that the total power generation amount of the requested power generation amounts for each of the plurality of fuel cell systems is equal to the standard power generation amount that should be generated by the plurality of fuel cell systems.

3. The power generation system according to claim 2, wherein in the process of determining the requested power generation amount, the requested power generation amount for each of the plurality of fuel cell systems is determined such that the requested power generation amount for each of the plurality of fuel cell systems does not exceed the upper limit power generation amount for that fuel cell system.

4. The management device is capable of selectively executing a first mode and a second mode as the process for determining the requested power generation amount. The first mode is, A first process for determining the required power generation amount for each of the plurality of fuel cell systems such that the required power generation amount decreases for fuel cell systems where the degree of blockage of the intake filter is greater, In each of the plurality of fuel cell systems, a second process is performed to correct the requested power generation amount determined in the first process so that the requested power generation amount does not exceed the upper limit power generation amount of the fuel cell system, A third process includes correcting the requested power generation amount determined in the second process so that the total power generation amount of the requested power generation amounts for each of the plurality of fuel cell systems is equal to the standard power generation amount that the plurality of fuel cell systems should generate, The power generation system according to claim 1, wherein the second mode includes the first process and the second process, but does not include the third process.

5. Each of the aforementioned fuel cell systems further, A first pressure sensor that detects a first pressure, which is the pressure of the air before it passes through the intake filter, The system includes a second pressure sensor that detects a second pressure, which is the pressure of the air after it has passed through the intake filter, The power generation system according to claim 1, wherein the control device of the plurality of fuel cell systems calculates the degree of blockage using the first pressure and the second pressure.

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