JP2011165318A - Fuel cell generator system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell generator system capable of promptly stopping supply of raw material gas, in case gas pressure inside a raw material gas supply piping abnormally falls. <P>SOLUTION: In the fuel cell generator system, a gas-side controller 5 sends a plurality of pieces of information concerning itself 5 to an electric equipment-side controller 4 at a given period, until gas pressure (gas pressure inside the raw material gas piping located between a hydrogen generating device 1 and a gas supply valve 10) detected by a gas pressure abnormality detector 9 reaches a given value, but, if gas pressure detected by the gas pressure abnormality detector 9 gets down to an abnormal pressure lower than the given value, a gas pressure information detected by the gas pressure abnormality detector 9 is sent as a top priority, and the electric equipment-side controller 4 closes the gas supply valve 10 on the basis of the gas pressure information detected by the gas pressure abnormality detector 9 and sent through the gas-side controller 5. Therefore, in case gas pressure inside the raw material gas piping abnormally falls, the gas supply valve 10 can be promptly shut off to stop supply of raw material gas to the hydrogen generating device 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fuel cell power generation system that generates power using a fuel gas generated from a combustible raw material gas.

  Conventionally, this type of fuel cell power generation system generates a fuel gas mainly composed of hydrogen from a source gas such as city gas or propane gas by a hydrogen generator, and reacts the generated hydrogen with oxygen in the air. Power generation.

  In this way, in equipment that uses gas from a cogeneration system such as a fuel cell power generator, a stack, hydrogen generator, etc. should be used so that even if combustible gas flows out of the hydrogen generator, it does not flow into the electrical components. There is also a structure in which the gas part is separated from the electric parts such as the power conversion device and the control means by a partition wall so that the gas does not easily flow into the electric part and the explosion is prevented in advance (see, for example, Patent Document 1).

  In addition, the functions of the fuel cell power generation system are broadly divided into a main station controller that controls the entire system, a hydrogen generator controller that controls the hydrogen generator, a stack controller, and an inverter controller. In some cases, the risk of disconnection, incorrect connection, and the like is greatly reduced by decentralizing (see, for example, Patent Document 2).

  FIG. 4 shows a conventional fuel cell power generator system disclosed in Patent Document 1. In FIG. As shown in FIG. 4, the conventional fuel cell power generation system includes a hydrogen generator 1 that generates a fuel gas mainly composed of hydrogen from a combustible raw material gas, and a fuel gas generated by the hydrogen generator 1. A stack 2 that generates DC power using an oxidant gas, a power converter 3 that converts DC power generated by the stack 2 into AC power that can be connected to the grid, a hydrogen generator 1 and a stack 2. The gas side control means 5 for controlling, the electrical equipment side control means 4 for communicating with the gas side control means 5 and controlling the power converter 3, and the inside is divided into two spaces by the partition wall 7, and one of the two spaces And a housing 6 for storing the power conversion device 3 and the electrical equipment control means 4 in the other of the two spaces. ing.

JP-A-5-290868 JP 2007-242330 A

  However, in the above conventional configuration, the information related to the gas side control means 5 is transmitted from the gas side control means 5 to the electrical equipment side control means 4 at a predetermined communication cycle, and the gas pressure in the source gas supply pipe is predetermined. Even if the value drops below the value, the gas pressure abnormality cannot be sent to the electrical equipment control means 4 without waiting for a certain period of time, and even when the value drops below the predetermined value, the valve cannot be instantly closed. It had the subject of making the gas pressure in gas piping into a negative pressure.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a fuel cell power generation system that can quickly stop the supply of source gas when the gas pressure in the source gas supply pipe is abnormally reduced. And

  In order to achieve the above object, a fuel cell power generation system according to the present invention includes a hydrogen generation device that generates a fuel gas containing hydrogen as a main component from a combustible raw material gas, and the fuel generated by the hydrogen generation device. A stack that generates DC power using a gas and an oxidant gas, a power converter that converts the DC power generated by the stack into AC power that can be connected to a grid, the hydrogen generator, and the stack. A gas side control means for controlling, an electrical equipment side control means for controlling the power converter by communicating with the gas side control means, and a raw material gas pipe for supplying the raw material gas to the hydrogen generator, the electrical equipment side A gas supply valve that is controlled by a control means and stops supply of the source gas to the hydrogen generator when the valve is closed; and the hydrogen generator and the gas connected to the gas control means Gas pressure abnormality detecting means for detecting the gas pressure in the source gas pipe located between the supply valve and the interior of the space is divided into two spaces by a partition wall, and the hydrogen is generated in one of the two spaces. The device, the stack, the gas side control means, the gas supply valve, and the gas pressure abnormality detection means are accommodated, and the hydrogen generation apparatus and the stack are positioned higher than the stack in the other of the two spaces. A housing that houses a power converter and the electrical equipment side control means, and the gas side control means controls the gas side control until the gas pressure detected by the gas pressure abnormality detection means becomes lower than a predetermined value. A plurality of pieces of information related to the means are transmitted to the electrical equipment control means at a predetermined cycle. When the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than a predetermined value, the gas pressure abnormality detection is performed. The gas pressure information detected by the stage is sent with the highest priority, and the electric equipment side control means supplies the gas based on the gas pressure information detected by the gas pressure abnormality detection means and transmitted through the gas side control means. It is configured to close the valve.

  In the above configuration, the gas side control means transmits a plurality of pieces of information related to the gas side control means to the electrical equipment side control means at a predetermined cycle until the gas pressure detected by the gas pressure abnormality detection means becomes lower than a predetermined value. However, when the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than a predetermined value, the gas pressure information detected by the gas pressure abnormality detection means is sent with the highest priority. Since the gas supply valve is closed based on the gas pressure information detected by the detection means and transmitted via the gas side control means, when the gas pressure in the source gas supply pipe drops abnormally, the supply of the source gas is promptly performed. Can be stopped.

  In another aspect of the present invention, a direct current is generated by using a hydrogen generator that generates hydrogen-based fuel gas from a combustible raw material gas, and the fuel gas and oxidant gas that are generated by the hydrogen generator. A stack for generating power, a power converter for converting DC power generated by the stack into AC power that can be connected to a grid, and a valve provided in a source gas pipe for supplying the source gas to the hydrogen generator A gas supply valve for sometimes stopping the supply of the source gas to the hydrogen generator, and a gas pressure abnormality detecting means for detecting a gas pressure in the source gas pipe located between the hydrogen generator and the gas supply valve And an electrical equipment side control means connected to the gas pressure abnormality detection means and controlling at least the power converter and the gas supply valve, and the inside is divided into two spaces by a partition wall, and the inside of the two spaces The hydrogen generation device, the stack, the gas supply valve, and the gas pressure abnormality detection means are accommodated in the other space, and the hydrogen generation device and the stack are positioned higher in the other of the two spaces. A housing that houses the power conversion device and the electrical control unit, and the electrical control unit detects the gas when the gas pressure detected by the gas pressure abnormality detection unit becomes an abnormal pressure lower than normal. The supply valve is configured to close.

  In the above configuration, the gas pressure abnormality detecting means is directly connected to the electrical equipment side control means, and the electrical equipment side control means is configured to provide the gas supply valve when the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than normal. Therefore, when the gas pressure in the source gas supply pipe is abnormally lowered, the supply of the source gas can be stopped quickly.

  When the gas pressure in the raw material gas supply pipe becomes an abnormal pressure lower than a predetermined value, the fuel cell power generator system of the present invention can quickly close the gas supply valve and stop the gas supply. In addition, even if there is a leak of flammable source gas or fuel gas from the hydrogen generator or stack or the periphery thereof, or there is a water leak from the hydrogen generator or stack or the periphery thereof. However, the power converter and the electrical equipment side control means are not easily affected by the gas leakage or water leakage.

1 is a configuration diagram of a fuel cell power generation system according to Embodiment 1 of the present invention. The flowchart which shows the control at the time of closing operation of the gas supply valve of the fuel cell power generator system of the embodiment Configuration diagram of a fuel cell power generation system according to Embodiment 2 of the present invention Configuration diagram of conventional fuel cell power generation system

  According to a first aspect of the present invention, there is provided a hydrogen generator that generates a fuel gas containing hydrogen as a main component from a combustible raw material gas, and direct current power using the fuel gas and the oxidant gas generated by the hydrogen generator. A stack for generating power, a power converter that converts DC power generated by the stack into AC power that can be connected to a grid, a gas-side control unit that controls the hydrogen generator and the stack, and the gas-side control Means for controlling the power converter by communicating with the means, and the hydrogen generator provided in the source gas pipe for supplying the source gas to the hydrogen generator and controlled by the electrical side controller when the valve is closed A gas supply valve for stopping the supply of the source gas to the gas, and a gas pressure in the source gas pipe connected to the gas side control means and located between the hydrogen generator and the gas supply valve. A gas pressure abnormality detecting means for detecting, an interior is divided into two spaces by a partition wall, and the hydrogen generating device, the stack, the gas side control means, the gas supply valve, and the gas supply valve in one of the two spaces; A housing for housing the power conversion device and the electrical equipment side control means at a position higher than the stack and the hydrogen generation device in the other of the two spaces. The gas side control means includes a plurality of pieces of information related to the gas side control means at a predetermined cycle until the gas pressure detected by the gas pressure abnormality detection means becomes lower than a predetermined value. However, when the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than a predetermined value, the gas pressure information detected by the gas pressure abnormality detection means is sent with the highest priority, The side control means closes the gas supply valve based on the gas pressure information detected by the gas pressure abnormality detection means and transmitted via the gas side control means. .

  In the above configuration, the gas side control means transmits a plurality of pieces of information related to the gas side control means to the electrical equipment side control means at a predetermined cycle until the gas pressure detected by the gas pressure abnormality detection means becomes lower than a predetermined value. However, when the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than a predetermined value, the gas pressure information detected by the gas pressure abnormality detection means is sent with the highest priority. Since the gas supply valve is closed based on the gas pressure information detected by the detection means and transmitted via the gas side control means, when the gas pressure in the source gas supply pipe drops abnormally, the supply of the source gas is promptly performed. Can be stopped.

  The interior of the housing is partitioned into two spaces by a partition, and the hydrogen generator, the stack, the gas side control means, the gas supply valve, and the gas pressure abnormality detection means are accommodated in one of the two spaces. Since the power conversion device and the electrical equipment side control means are housed at a position higher than the hydrogen generation device and the stack in the other space of the two spaces, the flammability from the hydrogen generation device or the stack or their peripheral parts Even if there is a leak of raw material gas or fuel gas, or even if there is a water leak from the hydrogen generator or stack or their peripheral parts, the power converter and the electrical equipment control means will Less susceptible to leakage.

  According to a second aspect of the present invention, direct current power is generated using a hydrogen generator that generates a fuel gas mainly composed of hydrogen from a combustible raw material gas, and the fuel gas and oxidant gas that are generated by the hydrogen generator. A stack for generating power, a power converter for converting DC power generated by the stack into AC power that can be connected to a grid, and a source gas pipe that supplies the source gas to the hydrogen generator, and the valve is closed when the valve is closed. A gas supply valve for stopping supply of the raw material gas to the hydrogen generator, and a gas pressure abnormality detection means for detecting a gas pressure in the raw material gas pipe located between the hydrogen generator and the gas supply valve; An electrical equipment side control means connected to the gas pressure abnormality detecting means and controlling at least the power converter and the gas supply valve, and an interior is partitioned into two spaces by a partition wall, and one of the two spaces The hydrogen generating device, the stack, the gas supply valve, and the gas pressure abnormality detecting means are accommodated therebetween, and the electric power is positioned higher than the hydrogen generating device and the stack in the other of the two spaces. A housing that houses the conversion device and the electrical equipment side control means, and the electrical equipment side control means is configured to provide the gas supply valve when the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than normal. Is a fuel cell power generation system characterized in that

  In the above configuration, the gas pressure abnormality detection means is directly connected to the electrical equipment side control means, and the electrical equipment side control means directly acquires the information on the gas pressure detected by the gas pressure abnormality detection means. The side control means closes the gas supply valve when the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than normal, so that when the gas pressure in the raw material gas supply pipe is abnormally lowered, The supply of raw material gas can be stopped.

  Further, the interior of the housing is partitioned into two spaces by a partition wall, and the hydrogen generator, the stack, the gas supply valve, and the gas pressure abnormality detecting means are accommodated in one of the two spaces, Since the power conversion device and the electrical equipment side control means are stored at a position higher than the hydrogen generation device and the stack in the other space in the inside, the combustible raw material gas or fuel gas from the hydrogen generation device or the stack or their peripheral part Even if there is a leak of water, or even if there is a water leak from the hydrogen generator or stack or their surroundings, the power converter and the electrical control means are affected by the gas leak or water leak. Hateful.

  Hereinafter, embodiments of a fuel cell power generation system according to the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a configuration diagram of a fuel cell power generation system according to Embodiment 1 of the present invention, and FIG. 2 is a flowchart showing control during closing operation of a gas supply valve of the fuel cell power generation system of the same embodiment. .

  As shown in FIG. 1, the housing 6 includes a hydrogen generator 1 that generates steam from a raw material (for example, natural gas) and generates a fuel gas mainly composed of hydrogen, and a fuel generated by the hydrogen generator 1. Stack 2 that generates power using gas and oxidant gas, power converter 3 that converts DC power generated by stack 2 into AC power that can be connected to the grid, and hydrogen generation that operates using gas A gas-side control means 5 for controlling the apparatus 1 and the stack 2, an electrical equipment-side control means 4 for communicating with the gas-side control means 5 to control the power converter 3, and a gas supply valve 10 provided in the source gas pipe And a gas pressure abnormality detecting means 9 connected to the gas side control means 5 and positioned between the hydrogen generator 1 and the gas supply valve 10, and the housing 6 is partitioned into two spaces by a partition wall 7. , Hydrogen in one of the two spaces The generator 1, the stack 2, the gas side control means 5, the gas supply valve 10, and the gas pressure abnormality detection means 9 are accommodated, and the power is converted into a space higher than the hydrogen generator 1 and the stack 2 in the other of the two spaces. The apparatus 3 and the electrical equipment side control means 4 are accommodated.

  The operation and action of the fuel cell power generation system of the present embodiment configured as described above will be described below.

  First, the housing 6 generates source gas such as city gas into hydrogen gas, which is a fuel gas mainly composed of hydrogen, by the hydrogen generator 1 and reacts the generated hydrogen gas with an oxidant gas to generate power. I do. The source gas transmits the information on the gas pressure in the source gas piping acquired by the gas side control means 5 by the gas pressure abnormality detection means 9 to the electrical side control means 4 every predetermined communication cycle, and the electrical side control means 4 If the pressure is equal to or higher than a predetermined value, the gas supply valve 10 is opened and supplied to the hydrogen generator 1.

  The gas pressure in the raw material gas piping decreases due to the interruption of the microcomputer meter provided in each household, etc., and the microcomputer meter is used when a large earthquake occurs or when the gas continues to flow without an abnormally long flow rate change. When the gas volume suddenly increases or the gas pressure drops, the gas is automatically shut off. The gas pressure in the raw material gas pipe decreases when the microcomputer meter is shut off. However, if the gas pressure becomes an abnormal pressure lower than a predetermined value, it is promptly used to prevent the negative pressure in the raw material gas pipe. It is necessary to close the gas supply valve 10 and stop the gas supply. However, since the gas pressure information is acquired by the gas side control means 5, it takes a certain time until the abnormality is transmitted to the electrical equipment side control means 4. There is a risk of negative pressure.

  Next, a description will be given with reference to the flowchart of FIG. When the gas pressure in the raw material gas pipe located between the hydrogen generator 1 and the gas supply valve 10 detected by the gas pressure abnormality detection means 9 is a predetermined value or more, (S-1) in FIG. Branching to the side, the gas side control means 5 transmits a plurality of information related to the gas side control means 5 to the electrical equipment side control means 4 at a predetermined communication cycle (S-1). However, if the gas pressure in the raw material gas pipe located between the hydrogen generator 1 and the gas supply valve 10 detected by the gas pressure abnormality detection means 9 becomes an abnormal gas pressure lower than a predetermined value, ( Branching S-1) to the Yes side, the gas side control means 5 sends the gas pressure information detected by the gas pressure abnormality detection means 9 to the electrical equipment side control means 4 with the highest priority rather than the normal communication cycle. (S-3), the electrical equipment side control means 4 closes the gas supply valve 10 based on the gas pressure information detected by the gas pressure abnormality detection means 9 and transmitted via the gas side control means 5 (S-4). .

  As described above, the fuel cell power generation system according to the present embodiment includes the hydrogen generator 1 that generates fuel gas mainly containing hydrogen from the combustible raw material gas, and the fuel gas generated by the hydrogen generator 1. Stack 2 for generating DC power using oxidant gas (air), power converter 3 for converting DC power generated by stack 2 into AC power connectable to the system, hydrogen generator 1, A gas side control means 5 for controlling the stack 2, an electrical equipment side control means 4 for communicating with the gas side control means 5 to control the power converter 3, and a raw material gas pipe for supplying a raw material gas to the hydrogen generator 1 A gas supply valve 10 which is provided and controlled by the electrical equipment side control means 4 to stop the supply of the raw material gas to the hydrogen generator 1 when the valve is closed; and a gas side control means 5 connected to the hydrogen generator 1 and the gas supply valve Located between The gas pressure abnormality detecting means 9 for detecting the gas pressure in the raw material gas pipe, and the interior is partitioned into two spaces by the partition wall 7, and the hydrogen generator 1, the stack 2 and the gas side are placed in one of the two spaces. The control means 5, the gas supply valve 10 and the gas pressure abnormality detection means 9 are accommodated, and the power conversion device 3 and the electrical equipment side control means are positioned higher than the hydrogen generator 1 and the stack 2 in the other of the two spaces. 4 and the gas side control means 5 includes a plurality of pieces of information related to the gas side control means 5 until the gas pressure detected by the gas pressure abnormality detection means 9 becomes lower than a predetermined value. Is transmitted to the electrical control unit 4 at a predetermined cycle. When the gas pressure detected by the gas pressure abnormality detection unit 9 becomes an abnormal pressure lower than a predetermined value, the gas pressure information detected by the gas pressure abnormality detection unit 9 is displayed. Send with top priority, electrical control Means 4, characterized in that closing the gas supply valve 10 based on the gas pressure information conveyed via the gas side control unit 5 is detected by the gas 圧異 atmospheric detection means 9.

  In the above configuration, the gas side control means 5 has a gas pressure detected by the gas pressure abnormality detection means 9 (gas pressure in the raw material gas pipe located between the hydrogen generator 1 and the gas supply valve 10) from a predetermined value. Until a low value is received, a plurality of pieces of information related to the gas side control means 5 are transmitted to the electrical equipment side control means 4 at a predetermined cycle. However, the gas pressure detected by the gas pressure abnormality detection means 9 is abnormally lower than a predetermined value. When the pressure is reached, the gas pressure information detected by the gas pressure abnormality detection means 9 is sent with the highest priority, and the electrical equipment side control means 4 detects the gas pressure detected by the gas pressure abnormality detection means 9 and transmitted via the gas side control means 5. The gas supply valve 10 is closed based on the information.

  As described above, when the gas pressure in the raw material gas pipe becomes an abnormal pressure lower than a predetermined value, the information on the gas pressure detected by the gas pressure abnormality detecting means 9 is not the normal communication cycle but the gas side. By preferentially transmitting from the control means 5 to the electrical equipment side control means 4, the electrical equipment side control means 4 can quickly close the gas supply valve 10 and stop the supply of the raw material gas to the hydrogen generator.

  Further, the inside of the housing 6 is divided into two spaces by the partition wall 7, and the hydrogen generator 1, the stack 2, the gas side control means 5, the gas supply valve 10, and the gas pressure abnormality are in one of the two spaces. Since the detection means 9 is accommodated and the power conversion device 3 and the electrical equipment side control means 4 are accommodated at a position higher than the hydrogen generation device 1 and the stack 2 in the other of the two spaces, the hydrogen generation device 1 Even if there is a leak of flammable raw material gas or fuel gas from the stack 2 or the peripheral part thereof, or even if there is a water leak from the hydrogen generator 1 or the stack 2 or the peripheral part thereof, The power conversion device 3 and the electrical equipment side control means 4 are not easily affected by the gas leakage or water leakage.

(Embodiment 2)
FIG. 3 is a configuration diagram of the fuel cell power generation system according to Embodiment 2 of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the housing 6 is connected to the hydrogen generator 1, the stack 2, the power converter 3, the gas supply valve 10, the gas pressure abnormality detection means 9, and the gas pressure abnormality detection means 9, and at least power conversion is performed. It has an electrical equipment side control means 4 for controlling the apparatus 3 and the gas supply valve 10, the housing 6 is divided into two spaces by a partition wall 7, and a hydrogen generator is provided in one of the two spaces. 1, the stack 2, the gas side control means 5, the gas supply valve 10, and the gas pressure abnormality detection means 9 are accommodated, and the power conversion device 3 is placed in a space higher than the hydrogen generator 1 and the stack 2 in the other of the two spaces. And the electrical equipment side control means 4 are accommodated.

  The operation and action of the fuel cell power generation system of the present embodiment configured as described above will be described below.

  First, the gas pressure abnormality detecting means 9 for detecting the gas pressure in the raw material gas pipe is connected to the electrical equipment side control means 4 for controlling the gas supply valve 10. When the obtained gas pressure in the raw material gas pipe becomes an abnormal pressure lower than a predetermined value, the electric supply side control means 4 closes the gas supply valve 10 and stops the gas supply.

  As described above, the fuel cell power generation system according to the present embodiment includes the hydrogen generator 1 that generates fuel gas mainly containing hydrogen from the combustible raw material gas, and the fuel gas generated by the hydrogen generator 1. A stack 2 that generates DC power using oxidant gas (air), a power converter 3 that converts the DC power generated by the stack 2 into AC power that can be connected to the system, and a hydrogen generator 1. A gas supply valve 10 provided in a source gas pipe for supplying source gas and stopping supply of the source gas to the hydrogen generator 1 when the valve is closed, and a source gas pipe positioned between the hydrogen generator 1 and the gas supply valve 10 The gas pressure abnormality detecting means 9 for detecting the gas pressure in the inside, the electric equipment side control means 4 connected to the gas pressure abnormality detecting means 9 and controlling at least the power converter 3 and the gas supply valve 10, and the inside by the partition wall 7 two The hydrogen generator 1, the stack 2, the gas supply valve 10, and the gas pressure abnormality detection means 9 are accommodated in one of the two spaces partitioned between the two spaces, and the hydrogen generator in the other of the two spaces 1 and a housing 6 for housing the electrical equipment side control means 4 at a position higher than the stack 2, and the electrical equipment side control means 4 has a gas pressure detected by the gas pressure abnormality detection means 9. The gas supply valve 10 is closed when an abnormal pressure lower than normal is reached.

  In the above configuration, the gas pressure abnormality detection means 9 is directly connected to the electrical equipment side control means 4, and the electrical equipment side control means 4 directly acquires information on the gas pressure detected by the gas pressure abnormality detection means 9. The electrical control unit 4 closes the gas supply valve 10 when the gas pressure detected by the gas pressure abnormality detection unit 9 becomes an abnormal pressure lower than normal, so that the gas pressure in the raw material gas supply pipe becomes abnormal. When it falls, supply of source gas can be stopped quickly.

  Further, the inside of the housing 6 is divided into two spaces by a partition wall 7, and the hydrogen generator 1, the stack 2, the gas supply valve 10, and the gas pressure abnormality detecting means 9 are accommodated in one of the two spaces. Then, since the power conversion device 3 and the electrical equipment side control means 4 are accommodated in a position higher than the hydrogen generation device 1 and the stack 2 in the other of the two spaces, the hydrogen generation device 1 or the stack 2 or their Even if there is a leak of combustible raw material gas or fuel gas from the peripheral part, or even if there is a water leak from the hydrogen generator 1 or the stack 2 or their peripheral part, the power converter 3 and the electrical equipment The side control means 4 is not easily affected by the gas leak or water leak.

  As described above, the fuel cell power generation system according to the present invention quickly closes the gas supply valve and stops the gas supply when the gas pressure in the raw material gas supply pipe becomes an abnormal pressure lower than a predetermined value. It is suitable for household and commercial fuel cell power generation systems.

DESCRIPTION OF SYMBOLS 1 Hydrogen generator 2 Stack 3 Power converter 4 Electric equipment side control means 5 Gas side control means 6 Case 7 Partition 9 Gas pressure abnormality detection means 10 Gas supply valve

Claims (2)

A hydrogen generator that generates a fuel gas mainly composed of hydrogen from a combustible source gas, a stack that generates DC power using the fuel gas and the oxidant gas generated by the hydrogen generator; and A power conversion device that converts DC power generated by the stack into AC power that can be connected to the grid, gas-side control means that controls the hydrogen generation device and the stack, and communication with the gas-side control means An electrical equipment side control means for controlling the power converter, and a raw material gas pipe for supplying the raw material gas to the hydrogen generator, controlled by the electrical equipment side control means, and when the valve is closed, the raw material gas is supplied to the hydrogen generator. A gas supply valve that stops supply, and a gas that is connected to the gas-side control means and detects a gas pressure in the source gas pipe located between the hydrogen generator and the gas supply valve An anomaly detection means, and the interior is partitioned into two spaces by a partition wall, and the hydrogen generator, the stack, the gas side control means, the gas supply valve, and the gas pressure anomaly detection in one of the two spaces A housing for housing the power conversion device and the electrical equipment control means at a position higher than the stack and the hydrogen generating device in the other of the two spaces. The side control means transmits a plurality of information related to the gas side control means to the electrical equipment side control means at a predetermined cycle until the gas pressure detected by the gas pressure abnormality detection means becomes lower than a predetermined value. When the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than a predetermined value, the gas pressure information detected by the gas pressure abnormality detection means is sent with the highest priority, and the electrical equipment side control means The fuel cell power plant system characterized by closing the gas supply valve based on the gas 圧異 the gas pressure information conveyed is detected via the gas side control unit by atmospheric detection means. A hydrogen generator that generates a fuel gas mainly composed of hydrogen from a combustible source gas, a stack that generates DC power using the fuel gas and the oxidant gas generated by the hydrogen generator; and A power conversion device that converts direct current power generated by the stack into alternating current power that can be connected to the grid; and a raw material gas pipe that supplies the raw material gas to the hydrogen generation device, and the hydrogen generation device is closed when the valve is closed. A gas supply valve for stopping the supply of the raw material gas, a gas pressure abnormality detecting means for detecting a gas pressure in the raw material gas pipe located between the hydrogen generator and the gas supply valve, and the gas pressure abnormality detecting means And an electrical equipment side control means for controlling at least the power converter and the gas supply valve, and the interior is partitioned into two spaces by a partition wall, and the hydrogen is placed in one of the two spaces. The power conversion device and the stack at a position higher than the hydrogen generation device and the stack in the other space of the two spaces, containing the generator, the stack, the gas supply valve, and the gas pressure abnormality detection means. A housing for housing the electrical equipment side control means, and the electrical equipment side control means closes the gas supply valve when the gas pressure detected by the gas pressure abnormality detection means becomes an abnormal pressure lower than normal. A fuel cell power generation system characterized.

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