Design And Control Algorithms Of Fuel Cell Control System

The research and design of control system of Fuel cell generating unit base on the proton exchange membrane fuel cell demonstration power stations of south china university of technology, the control system uses embedded solutions, distributed structure, and communicates by reliable can bus. And the control algorithm of cooling water system of the Fuel cell generating unit is studied further.First,the paper introduces the principle of fuel cell power and its basic characteristics, then, introduces the design of control system, and details of each main modules, including the software and hardware design, and proposes a new method using double-sensor conductivity for bubble measurement to detect of hydrogen exhaust,in order to measure the battery efficiency. Finally, puts forward subsection control algorithm and adaptive fuzzy control algorithm of cooling system.Main research focuses on the following areas:Control system of Fuel cell generating unit can be divided into eight modules, including air supply and humidification module, hydrogen supply module, cooling water module, voltage and current detecting module, the main controller module, the can bus module, on-site operation module, and PC monitoring software module. According the modules analyzed, the control requirement is presented, corresponding control scheme is designed, then hardware and software implementation are detailed.A new method is put forward of hydrogen exhaust measurement.It is difficult to measure hydrogen in case of few hydrogen exhaust. Using double-sensor conductivity probe, the bubble parameters can be accurately measured, and the suction air can be adjusted and the efficiency of system improved.The control algorithm for cooling system is studied. Subsection control algorithm is put forward to ensure the battery's safety and efficient work condition. Further, adaptive fuzzy control algorithm is put forward, which avoid the system decoupling and modeling problem.