PWM整流系统模糊逻辑控制研究

针对三相电压源PWM整流双闭环控制系统中电压外环控制器动态响应速度快的要求，按照模糊逻辑控制器的原理，根据系统输出直流母线电压误差和电压误差变化率提出并设计一种模糊逻辑电压控制器，从而得到控制器的比例积分系数．在Matlab环境下建立了仿真模型，进行了系统带载启动、增加负载以及减小负载情况下进行了传统PID控制和基于模糊逻辑控制情况下系统输出直流电压的超调量和响应时间的对比实验．结果表明：这种控制方法在不改变系统的拓扑结构，不增加控制器的实现难度的情况下，在PWM整流系统中使用模糊逻辑控制，能改善系统的动态性能，抑制动态响应过程中的超调量，提高系统动态响应速度．

Study of fuzzy logic control in AC/DC converter

In order to meet the fast dynamic response requirement of the three phase voltage resource rectifier system, this paper designed a voltage fuzzy logic voltage controller with the direct busbar voltage error and the slope of the error based on the theory of fuzzy logic control, and got the parameters of the fuzzy logic controller. A simulation model was created in Matlab. The overshoot of the system response and time of system dynamic response were compared with the experiments of traditional PI controller versus Fuzzy controller based on Matlab-Simulink platform during the operation including starting, increasing load and decreasing load. From the simulation results, this control strategy cold improve the dynamic and static performance of the system with the waves of Matlab simulation model, not changing the topology of the system without obviously adding implementation burden of fuzzy controller.