改进重复控制的负载模拟变换器仿真实验

Simulation of load simulation converter with improved repetitive control

为了使控制理论课程的教学效果更加理想,提出将控制理论的教学与负载模拟变换器仿真实验相结合的教学方法。探讨解决传统PI控制稳定性差、无法实现对指令电流的无静差跟踪等问题,提出了改进重复控制的方案。给出了改进重复控制器的设计步骤以及具体参数。在Simulink仿真平台上建立了负载模拟变换器的系统仿真模型,对阻感性负载、阻容性负载以及突变负载进行了模拟与分析。结果表明:采用改进重复控制的负载模拟变换器,可以实现对指令电流的无静差跟踪,并且谐波畸变率低,可以更好地模拟负载。

In order to make the teaching effect of the control theory more ideal, the method of combining the teaching of control theory with the simulation of load simulation converter is put forward. In view of the problems that traditional PI control has poor stability and can＇t realize the zero static error tracking of the reference current, the scheme of improved repetitive control is proposed. The design steps and the specific parameters of the improved repetitive controller are given. The system simulation model of load simulation converter is established on Simulink simulation platform, and simulation and analysis of resistor-inductance load, resistor-capacitance load and abrupt load are carried out. The results show that the load simulation converter with improved repetitive control method can track the reference current with zero static error, and the harmonic distortion is low, which can better simulate the load.