摘要
三相电压型PWM整流器广泛采用在d-q同步坐标系的双闭环控制,即内环控制输入电流,外环控制输出电压。在这种控制方式中,电压外环通常采用线性PI控制。由于整流器输出电压与有功电流之间是非线性关系,线性PI控制不能反映整流器的非线性本质,使系统的控制性能受到限制。通过对整流器电压方程进行深入的分析,提出了一种以电容能量作为变量的新型电压控制策略,使得电压的控制实现了线性化,提高了输出电压的动态响应性能。仿真结果验证了提出方法的有效性,具有一定的实际应用价值。
The double closed loops control strategy of three-phase voltage source PWM rectifier in the synchronous reference frame is widely used, namely, the inner loop control input current, the outer loop control output voltage. In this kind of control mode, the linear PI control is usually adopted in the voltage control loop, which cannot reflect the nonlinear essence of the PWM rectifier, and restricts the system＇s control performance. According to the analyses of the voltage equation of the PWM rectifier, a voltage control strategy in which the capacitance＇ s energy is taken as a variable is proposed, so the linearization control in the voltage loop is realized, and the dy- namic responding performance of the voltage is improved. Simulation results confirm the validity of the mentioned strategy.
出处
《控制工程》
CSCD
北大核心
2014年第2期223-225,共3页
Control Engineering of China
基金
国家自然科学基金项目(50807041)
关键词
PWM整流器
非线性
控制策略
动态响应
PWM rectifier
nonlinearity
control strategy
dynamic responding
