摘要
针对燃料电池DC/DC变换器的工作优化问题,对DC/DC变换器的控制方法和输出响应特性进行了研究,提出了一种新型控制方法—动态演化控制,并将其应用于具体设计的燃料电池两相交错并联同步Buck变换器中,论述了该变换器的动态演化控制设计步骤,通过对变换器的特征方程以及动态演化路径进行分析,建立了控制占空比与动态演化方程之间的关系,进而实现对该变换器进行动态演化控制。利用Matlab-Simulink仿真平台对两相交错并联同步Buck变换器仿真模型分别在动态演化控制和传统PI控制下的负载突变输出性能进行了仿真测试。仿真研究结果表明,动态演化控制具备快速的动态响应能力和良好的抗干扰性能,比传统PI控制更为优越。
Aiming at optimizing the fuel cell DC/DC convener performance, the control method and output response characters of DC/DC converter were investigated. A new control technique--dynamic evolution control was proposed and applied to an interleaved synchronous Buck converter. After the analysis of converter system and dynamic evolution path, the duty cycle equation based on dynamic evolution control was obtained. Performance of the proposed dynamic evolution control and traditional PI control under step load variation condition was simulated under Matlab-Simulink environment. The simulation results indicate that the proposed control method is superior to traditional PI based controller because of fast transient response and good disturbance rejection.
出处
《机电工程》
CAS
2014年第11期1490-1494,1512,共6页
Journal of Mechanical & Electrical Engineering
