基于改进型指数趋近率的三相PWM整流器滑模控制策略

Sliding Mode Control Strategy of Three Phase PWM Rectifier Based on Improved Exponential Reaching Rate

为解决变结构控制引起的三相电压型PWM整流器抖振问题,设计一种改进型滑模控制策略,加强趋近率与状态变量之间的联系,削弱抖振现象;设计调节因子,加快变结构的趋近速度.仿真结果表明,改进型趋近率相比传统指数趋近率具有更快的响应速度和较好的抖振抑制效果.

To solve the jitter phenomenon of three-phase voltage PWM rectifier caused by variable structure control,a modified sliding mode control structure is designed to strengthen the connection between the convergence rate and the state variables,with the purpose of weakening the dithering phenomenon.The simulation results show that the improved convergence rate has a faster response and better jitter suppression for the traditional exponential convergence rate.