Fuel cell engine hydrogen in-pile pressure control method, device and equipment

Abstract

The invention provides a fuel cell engine hydrogen stack entering pressure control method, device and equipment. The method comprises the following steps of acquiring a target output current of a stack according to a target power of an engine; obtaining target in-pile pressure of hydrogen according to the target output current; calculating according to the target in-pile pressure and the actual in-pile pressure to obtain an error e, and calculating according to the error e to obtain an error change rate ec; the error e and the error change rate ec being inputted into a fuzzy controller and a PID controller, the proportional gain, the differential gain and the integral gain of the PID controller being adjusted according to the correction outputted by the fuzzy controller, and the target duty ratio of the hydrogen injector is outputted through the adjusted proportional gain, differential gain and integral gain; and controlling the starting time of the hydrogen injector in the fixed period according to the target duty ratio. According to the method, the hydrogen in-pile pressure can be kept constant under the condition that the drain valve is frequently opened and closed, the adjustment time is shorter, and the overshoot is smaller.

Description

technical field [0001] The present invention relates to the field of fuel cell engines, in particular to a method, device and equipment for controlling the pressure of hydrogen entering the stack of a fuel cell engine. Background technique [0002] In a fuel cell engine system, precise control of hydrogen pressure is extremely important, but during engine operation, the opening and closing of the drain valve has a great impact on the pressure of hydrogen entering the stack, and the displacement of the drain valve cannot be accurately estimated, so it is easy to cause hydrogen to enter the stack Pressure fluctuates frequently. [0003] There are two common control methods at present: [0004] (1) The open-loop control of the hydrogen inlet pressure is carried out through the empirical parameters obtained from the test calibration; [0005] (2) The traditional PID control algorithm is used to perform closed-loop control of the hydrogen gas inlet pressure. [0006] However, ...

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Problems solved by technology

[0006] However, the accuracy of the open-loop control strategy of the test and calibration parameters is poor, and there is basically no anti-interference ability, while the traditional PID control algorithm lags seriously and has weak anti-interference ability

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