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Fuzzy adaptive PID control method for fuel cell voltage

A fuzzy self-adaptive, fuel cell technology, applied in the direction of electric controllers, controllers with specific characteristics, etc., can solve problems such as massive calculations, multi-hardware support, and difficult implementation in industrial sites

Inactive Publication Date: 2019-01-18
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

However, this method requires a large number of calculations and requires more hardware support, which will make it difficult to implement in industrial sites

Method used

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  • Fuzzy adaptive PID control method for fuel cell voltage
  • Fuzzy adaptive PID control method for fuel cell voltage
  • Fuzzy adaptive PID control method for fuel cell voltage

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Embodiment Construction

[0094] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0095] Such as figure 1 As shown, this embodiment provides a fuzzy adaptive PID control method for fuel cell voltage, comprising the following steps:

[0096] 1) Build a dynamic model of the fuel cell based on the Simulink simulation platform of Matlab, such as figure 2 and image 3 Shown are the thermal modules of the built dynamic model and fuel cell model;

[0097] 2) Perform a step response test on the dynamic model of the fuel cell in step 1, and use the least squares method to identify the transfer function based on the obtained response data, and then use the model obtained from the identification to perform parameter tuning of the PID controller;

[0098] 3) Design a fuzzy controller, perform fuzzy processing according to the voltage error and the rate of change of the voltage error, use fuzzy rules to perform fuzzy reasoning and de...

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Abstract

The invention discloses a fuzzy adaptive PID control method for a fuel cell voltage. The method comprises the following steps of setting up a dynamic model of a fuel cell; carrying out a step responsetest on the dynamic model of the fuel cell, carrying out transfer function identification based on obtained response data through adoption of a least square method, and carrying out parameter settingof a PID controller through utilization of an identified model; and designing a fuzzy controller, carrying out fuzzification on the fuzzy controller according to a voltage error and a change rate ofthe voltage error, carrying out fuzzy reasoning and defuzzification according to a fuzzy rule, thereby obtaining correction parameters, and correcting a proportion coefficient and an integral coefficient, wherein differentiation action is realized according to a differentiation forward algorithm. According to the method, influence of fuel cell nonlinearity can be effectively suppressed, overshootis reduced, transition time is reduced, an integral saturation phenomenon and a jump phenomenon of differentiation action are overcome, and ideal control performance is achieved.

Description

technical field [0001] The invention belongs to the field of fuel cell control, in particular to a fuzzy self-adaptive PID control method for fuel cell voltage. Background technique [0002] Fuel cell is an electrochemical device that can directly convert chemical energy into electrical energy. It has the characteristics of high efficiency, low pollution and portability. It is widely used in various power generation fields and is expected to replace traditional fossil energy. Among all fuel cells, fuel cells (solid oxide fuel cells) have attracted much attention because of their high efficiency and strong stability, and do not require precious metals as raw materials. In order to improve the power supply quality of fuel cells, It is of great significance to precisely control the output voltage of the fuel cell. [0003] Today, traditional PID controllers are widely used in industrial control systems because of their high reliability and simple structure. The three paramete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 秦宇枭孙立
Owner SOUTHEAST UNIV
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