Average power control method and system for multi-module fuel cell system

A technology of a fuel cell system and a control method, which is applied in the directions of electrical components, circuit devices, AC network circuits, etc., can solve the problems of low work efficiency and shortening the service life of fuel cells, etc.

Pending Publication Date: 2021-07-13
SHANGHAI EVERPOWER TECHNOLOGIES LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Each module is not at the proper working efficiency point, resulting in low overall working efficiency and reducing the service life of the fuel cell of the entire system

Method used

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  • Average power control method and system for multi-module fuel cell system
  • Average power control method and system for multi-module fuel cell system
  • Average power control method and system for multi-module fuel cell system

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Embodiment Construction

[0037] A detailed description will be given below in conjunction with the accompanying drawings.

[0038] Aiming at the deficiencies of the prior art, the present invention provides a multi-module fuel cell system average power control method and system, which can also be called a fuel cell power control method and system.

[0039] In the prior art, the best efficiency operating point of the fuel cell power generation module is 80% to 100% of the rated power. In actual use, the user's power consumption will vary due to changes in the number of load devices activated in different time periods, resulting in the real-time output power of the fuel cell may be 20%, 50% or 90%. The control module of the fuel cell system needs to manage the power and opening and closing status of the power generation module according to the real-time total power consumption, and increase or decrease the number of start-up modules of the invention in real time. In the prior art, when multiple modules...

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Abstract

The invention relates to an average power control method and system for a multi-module fuel cell system. The method at least comprises the following steps of determining an optimal operation index of a power generation module based on the output total power and the optimal power of a plurality of power generation modules; and adjusting the starting number of the power generation modules based on the optimal operation index so as to enable the power generation modules to operate in a uniform power state. According to the present invention, the starting number of the power generation modules is regulated and controlled according to the real-time electricity utilization power of the loads, and part of the power generation modules are increased or decreased in real time, so that the power generation modules work with the optimal average power and high efficiency.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method and system for controlling average power of a multi-module fuel cell system. Background technique [0002] In the prior art, when the multi-module fuel cell system is running, it is only necessary to set the same output voltage for each module and work at the same time; or to set different output voltages for each module independently, which may easily cause large deviations in the output power of each module. Some modules run in a light-load state, while others run in a heavy-load state, and the total work efficiency of each working module is not high at the same time. [0003] For example, Chinese patent CN 108312871A discloses a method for controlling the current output of a power module group. The method includes updating the distribution number of power modules in real time according to the vehicle demand current and the actual output current value of each power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/32
CPCH02J3/466H02J3/32
Inventor 陈焕光卞松江
Owner SHANGHAI EVERPOWER TECHNOLOGIES LTD
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