基于反步法的单相电压型SPWM变流器控制

Control of Single-phase Voltage Type SPWM Converters Based on Back Stepping

单相电压型SPWM变流器的非线性特性使变流器的控制器设计较困难,不易获得良好的变流器输入电流,且动态响应较慢。采用反步法在Lyapunov稳定性理论的基础上逆向推导出一种对单相电压型SPWM变流器新的控制策略,并在使用PSCAD软件仿真所搭建模型效果良好的基础上,构建实验平台对该控制策略的有效性进行了实验验证。实验表明,能够实现控制目标,可以有效提高系统的动态响应特性和抗干扰能力。

Due to nonlinear characteristics of the single-phase voltage type SPWM converter, the design of its controller is quite difficult, and to obtain high-quality converter input current is no easy task. Furthermore, dynamic response is quite slow. To solve this problem, using the back stepping method, we inversely deduce a new control strategy for the single-phase voltage type SPWM converter on the basis of the Lyapunov stability theory, and on the basis of good PSCAD simulation model effect, we establish a test platform for experimental verification of the validity of the control strategy. Experiments show that the control method can achieve control objectives and effectively improve the system＇s dynamic response characteristic and anti-jamming capability.