JPH10199560A - Fuel cell power generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with abnormality effectively by restraining a device from being stopped if the abnormality occurs, which needs long restarting operation and is a factor of properties degradation being caused by the stress generated in a cell inside. SOLUTION: A generated power decrease discriminating part is formed at the failure detecting part 1 of an abnormality processing circuit. If a failure signal comes from such minor fault that permits power generating operation to be conducted by decreasing generated power, it is discriminated as necessity of generated power decrease and a signal is transmitted to a process confirmation part 2. During linkage operation, linkage operation is maintained, and a signal is transmitted to a generated power decreasing part 3. The setting value of generated power is set to the lower limit of its criterion to decrease generated power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration of an abnormality processing circuit attached to a fuel cell power generator.

[0002]

2. Description of the Related Art A fuel cell power generator is operated with an abnormality processing circuit for safely processing an abnormal situation when it occurs. FIG. 2 is a functional block diagram showing a basic configuration of an abnormality processing circuit of a conventionally used fuel cell power generator. The abnormality detection unit 1 to which the detected abnormality signal is sent is provided with four types of determination units, and is configured to select a processing method according to the type of the abnormality signal. That is, if the abnormal signal is of a type that requires an emergency stop of the apparatus, the emergency stop unit determines that an emergency stop is necessary, and sends a signal to the process confirmation unit 2. At this time, if the interconnection operation is being performed, an emergency stop measure is automatically taken. In addition, if the abnormal signal is of a type that must be stopped after performing the preparatory measures required for normal operation stop, the normal stop determination unit determines that normal stop is necessary, and measures for normal operation stop are taken. Taken. In addition, if the abnormal signal is an abnormal signal at a level at which the power generation device can be disconnected from the system and run independently to stand by, the standby line failure determination unit determines that the standby line has failed, and disconnects the device from the system to provide a stand-alone standby measure. Is adopted. Also, although the level of the abnormality is low and it is not necessary to stop the operation of the device, if the abnormality signal is of a level that requires monitoring the progress, the alarm determination unit determines that an alarm is required, sets an alarm, and sets the alarm. System operation is continued.

[0003]

In the conventional fuel cell power generator, when an abnormality is detected as described above, the abnormality is classified into four types: emergency stop, normal operation stop, self-standby standby, and alarm setting. Processing is in progress. However, when the operation of the device is stopped in response to the emergency stop or the normal operation stop, there is a problem that it takes a long time to restart after the abnormality is resolved. In addition, when the operation is shifted to the emergency stop, the normal operation stop, or the self-sustained standby, the temperature of the battery body changes according to the change of the operation condition, so that there is a problem that the internal stress is applied and the battery is deteriorated.

SUMMARY OF THE INVENTION An object of the present invention is to suppress a stop of the apparatus when an abnormality occurs, which requires a long restarting operation, causes stress inside the battery and causes deterioration of characteristics, and effectively performs abnormal processing. It is an object of the present invention to provide a fuel cell power generation device to be used.

[0005]

In order to achieve the above object, the present invention provides: (1) an abnormality processing circuit attached to a fuel cell power generator;
A determining unit that receives the abnormal signal and determines whether or not the generated power needs to be reduced; A processing unit that emits light is provided.

(2) The abnormality processing circuit further includes a determination unit that determines whether or not the operation of the device needs to be stopped in response to the abnormality signal, and receives a signal from the determination unit to generate power during the interconnection operation. A processing unit that issues an operation stop command to stop the operation of the device is provided. (3) Further, the abnormality processing circuit according to (1) or (2) above receives a signal from the determination unit which receives the abnormality signal and determines whether or not an emergency stop of the device is necessary. A processing unit for issuing an operation stop command for urgently stopping the operation of the power generating apparatus during the interconnection operation is provided.

According to the above (1), when an abnormality is detected, if the generated power is reduced and the operation can be continued if the generated power is reduced, the generated power can be stopped without stopping the operation. , The operation can be easily returned to the predetermined operation state when the abnormal state ends. According to the above (2), when the abnormality level is high and it is necessary to perform the stop operation of the apparatus, the apparatus can be appropriately operated not only in the normal operation but also in the reduced power generation operation. Since the stop operation is performed, safe treatment can be performed without causing damage to the device.

In the case of (3), when the level of abnormality is extremely high and it is necessary to perform an emergency stop operation of the apparatus, it is appropriate not only in the normal operation but also in the operation of reducing the generated power. The emergency stop operation of the device is performed at the time, and safe treatment is performed.

[0009]

FIG. 1 is a functional block diagram showing a basic configuration of an abnormality processing circuit of an embodiment of a fuel cell power generator according to the present invention. In this abnormality processing circuit, the abnormality detection unit 1 to which the detected abnormality signal is sent is provided with four types of emergency stop determination unit, normal stop determination unit, standby line failure determination unit, and alarm determination unit provided in the conventional example. In addition to the judgment unit, a generated power reduction judgment unit is provided. If the transmitted abnormal signal is a minor failure that can continue operation if the generated power is reduced, it is necessary to reduce the generated power. And a signal is sent to the process confirmation unit 2. At this time, if the interconnection operation is being performed, the interconnection operation is automatically continued, and at the same time, a signal is sent to the generated power reduction processing unit 3. In the generated power reduction processing unit 3, the set value of the generated power is set to the reference lower limit value by the transmitted signal, and the generated power calculation unit compares the current generated power value and the generated power set value to obtain the calculation result. It is sent to the generated power command unit. Based on this, a control signal is issued from the generated power command unit, and measures are taken to reduce the generated power at a constant speed.

By using the abnormality processing circuit of this configuration, even in the abnormal state in which the stop operation was conventionally performed, in the case of the abnormal state in which the level is relatively low, the apparatus is operated with the generated power reduced without stopping the apparatus. Therefore, when the abnormal state is resolved, the restart operation requiring a long time is not required, and the operation can be performed efficiently. In addition, this abnormality processing circuit is equipped with an emergency stop determination unit and a normal stop determination unit, so that abnormalities continue for a certain period of time during normal operation as well as during operation with reduced generated power. If a serious abnormality is detected, a normal stop process or an emergency stop process is performed, and the device can be safely treated without causing damage to the device.

[0011]

As described above, according to the present invention, (1) the abnormality processing circuit receives the abnormality signal and determines whether or not it is necessary to reduce the generated power, and receives the signal from the determination unit. And a processing unit that issues a generated power command to reduce the generated power of the power generating apparatus during the interconnection operation to the reference set value, so that the operation of the power generating apparatus is stopped in a relatively mild abnormal state. You no longer need to. Therefore, the deterioration of the battery characteristics due to the stoppage of the device is avoided, and the restart operation that requires a long time is not required, so that the fuel cell power generator can be operated efficiently.

(2) A determination unit for determining whether or not it is necessary to stop the operation of the apparatus by receiving an abnormality signal in the abnormality processing circuit, and receiving a signal from the determination unit to generate power during the interconnection operation. A processing unit that issues an operation stop command to stop the operation of the device,
Further, a determination unit that receives the abnormality signal and determines whether or not the device needs to be emergency stopped, and a process of receiving a signal from the determination unit and issuing an operation stop command for urgently stopping the operation of the power generating device during the interconnection operation If a relatively severe abnormal condition occurs, it is possible to appropriately stop the device without causing damage to the device, not only during normal operation but also during reduced power generation operation. Since the operation is performed, the degree of stopping of the apparatus when an abnormality occurs is suppressed, and the apparatus is particularly suitable as a fuel cell power generation apparatus in which abnormality processing is effectively performed.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a basic configuration of an abnormality processing circuit of an embodiment of a fuel cell power generator according to the present invention.

FIG. 2 is a functional block diagram showing a basic configuration of an abnormality processing circuit of a conventionally used fuel cell power generator.

[Explanation of symbols]

 1 Abnormality detection unit 2 Process confirmation unit 3 Generated power reduction processing unit

Claims (3)

[Claims] An abnormality processing circuit is provided with a judging unit for judging the necessity of reducing the generated power in response to an abnormal signal, and receiving a signal from the judging unit to generate electric power of the power generating apparatus in an interconnected operation A fuel cell power generator, comprising: a processing unit that issues a generated power command to reduce power to a reference set value. 2. An abnormality processing circuit, further provided with a judging unit for judging the necessity of stopping the operation of the apparatus by receiving an abnormal signal, and receiving a signal from the judging unit to generate power during the interconnection operation. The fuel cell power generator according to claim 1, further comprising a processing unit that issues an operation stop command to stop the operation of the device. A determining unit for determining whether or not an emergency stop of the device is required by receiving an abnormal signal from the abnormality processing circuit attached thereto; and receiving a signal from the determining unit to generate power during the interconnection operation. The fuel cell power generator according to claim 1 or 2, further comprising a processing unit that issues an operation stop command for urgently stopping the operation of the device.