Multi-target sliding mode control method for proton exchange membrane fuel cell system

Abstract

The invention discloses a multi-target sliding mode control method for a proton exchange membrane fuel cell system. The method realizes system power tracking by using a current change rate as a control quantity for the first time. The efficient and safe operation of a fuel cell is ensured. The influence of the external load of the fuel cell, the cathode air flow, the anode hydrogen flow and the working temperature change of the galvanic pile on the output characteristics of the cell is comprehensively considered; and a multi-target sliding mode controller is designed to control the output power, the cathode air flow, the cathode and anode pressure difference and the stack temperature of the proton exchange membrane fuel cell system, so that the output power of the system is maximized whilethe tracking load demand power is ensured.

Description

technical field

[0001] The invention belongs to the technical field of fuel cells, and in particular relates to the design of a multi-objective sliding mode control method for a proton exchange membrane fuel cell system. Background technique

[0002] Proton exchange membrane fuel cell is a complex nonlinear system, and its dynamic response under transient conditions has always been a research hotspot. During the working process of the fuel cell system, the compressor provides air (oxygen) for the fuel cell. equipment, therefore, effective control of the compressor can improve the efficiency of the system. At the same time, hydrogen is one of the reactants required for the normal operation of the fuel cell, and its flow rate is directly related to the power generation efficiency of the fuel cell system. If the hydrogen flow is too small, the hydrogen supply will be insufficient, and the pressure difference between the cathode and the anode will be large, which will damage t...

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