Simulation Of Fuel Cell Power Generation System And Parallel Control Research

With the increasing shortage of petroleum, coal and some other traditional resources, as well as the deterioration of the environment in the earth, hydrogen-oxygen fuel cell, characterized with a new, clean power generation method, becomes the research focus of many countries. A fuel cell stack constitute of a number of single fuel cells in series, usually used to get the high voltage; and more than one fuel cell stack in parallel form the power generation system to reach a large power. However, due to the soft output characteristics of the fuel cell, it can not be directly operated in parallel. And the complexity and nonlinear characteristics of the fuel cell system structure, lead to the complexity of its control system. In this paper, the above problem, starting from the mathematical modeling, combined with a sophisticated control algorithm, power balancing strategy of dual PID control was put forward. The main contents were as follows:First, the structure of the fuel cell power generation system was introduced,. Second, the mathematical model of the fuel cell power generation system and Simulink-based simulation model were established, and its steady-state performance and dynamic performance were analyzed.Secondly, the mathematical model of the fuel cell power generation system using Simulink to establish a simulation model of the fuel cell power generation system, and its steady-state performance and dynamic performance simulation analysis to study the working temperature, the reaction gas pressure and proton exchange membrane water content of the fuel cell performance, as well as the cathode gas parameters under different conditions, dynamic response, the simulation results show that the fuel cell power generation system simulation model to reflect the actual working conditions.Finally, the use of fuel cell power system simulation model, the simulation analysis of the PID control algorithm based on the amount of air supply air supply system, and on this basis, the parallel operation of a fuel cell power generation system, the air supply to the inner ring, the power of the outer loop PID control strategy.The results showed that:the fuel cell power generation system model could the reaction of its operating characteristics. The power balancing strategy of double PID control can basically meet the requirements of the system, and could meet the requirement in the steady-state error and response time.