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Power output control method and power output control system for fuel cell power generation array system

A power output control, fuel cell technology, applied in fuel cell control, fuel cells, fuel cell additives, etc., can solve the problems affecting the transient response performance of DC/DC circuits, steady-state voltage accuracy, etc. Guaranteed stability and small computational effort

Active Publication Date: 2018-11-06
SOUTHWEST JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

Due to the existence of instability, it affects the transient response performance of the DC / DC circuit and the accuracy of the steady-state voltage

Method used

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  • Power output control method and power output control system for fuel cell power generation array system
  • Power output control method and power output control system for fuel cell power generation array system
  • Power output control method and power output control system for fuel cell power generation array system

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Embodiment Construction

[0052] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further elaborated below in conjunction with the accompanying drawings.

[0053] In this example, if figure 1 As shown, a power output control method of a fuel cell power generation array system includes steps:

[0054] S100, collect the output voltage and inductor current of the DC / DC circuit, and collect the output voltage of the fuel cell;

[0055] S200, calculating the switch-on time and switch-off time of the DC / DC circuit by a quasi-fixed frequency average current control method;

[0056] S300 uses the switch on time and switch off time to obtain the switch control signal through modulation and demodulation, so as to control the DC / DC circuit;

[0057] S400. Control the power output of each fuel cell in the fuel cell system by controlling each DC / DC circuit.

[0058] As an optimization scheme of the above-mentioned embodiment, such as ...

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Abstract

The invention discloses a power output control method and a power output control system for a fuel cell power generation array system. According to the present invention, by collecting the output voltages and the inductance current signals of each DC / DC circuit in each fuel cell system, low-frequency ripple control is stabilized to obtain a switch-on time and a switch-off time, such that a switchcontrol signal is generated so as to carry out DC / DC converter control; the control system comprises a data acquisition module, an outer loop voltage control module, a slope calculation module, a switch control module and a modulation and demodulation module; the slope transformation of the inductance current under the switch control is calculated to obtain a duty ratio, and the switch signal is controlled by the modulation and demodulation module so as to carry out DC / DC converter control; the performance of the DC / DC converter is improved by stabilizing the low-frequency ripple control; andthe multi-stack fuel cell uses the parallel topology structure and controls the mean current, such that each stack in the fuel cell array can output the required power.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a power output control method and system of a fuel cell power generation array system. Background technique [0002] With the rise of distributed power generation technology, new types of renewable energy have attracted increasing attention. The traditional fossil energy is gradually decreasing or even exhausted, and it can no longer meet the daily needs of human beings. As a result, more and more new high-quality energy sources are emerging, and the development and utilization of new, clean and renewable energy sources is imperative. Fuel cell is a clean and efficient power generation device. As an important part of distributed power supply, it has attracted extensive attention for its many advantages. In particular, the proton exchange membrane fuel cell (PEMFC) has the characteristics of low operating temperature, low noise, high efficiency, and fast response....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04298H01M8/04537H01M8/04992
CPCH01M8/04298H01M8/04567H01M8/04597H01M8/04992Y02E60/50
Inventor 陈维荣朱亚男李奇黄文强邓惠文尚伟林苏波
Owner SOUTHWEST JIAOTONG UNIV
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