基于PR控制的交流斩波稳压源研究

Research on AC Chopper Regulated Power Supply Based on PR Control

针对传统AC/DC/AC交流稳压源体积大、输入谐波大等问题,提出基于PWM斩波控制的单相交流稳压源。为提高稳压源的稳定性和对负载的适应性,提出基于PR控制的电压外环和简单比例控制的电感电流内环的双闭环控制策略。分析表明,电压外环的PR控制可实现对指令信号的无静差跟踪,保证了系统的稳态精度,以及对负载电流的抗干扰能力;电流内环使系统具有可靠的快速性和稳定性。最后搭建了Matlab仿真和硬件试验平台,仿真和试验验证了所提结构和控制方法的可行性。

In view of these problems such as, large volume and large input harmonic of traditional AC/DC/AC single-phase AC regulated power supply, this paper designed a single-phase AC regulated power supply based on PWM chopping control. The structure saves the DC side capacitor. In order to improve the stability and adaptability to load of the voltage source,it put forv^ard the double closed-loop control strategy based on the outer voltage loop of PR control and of the inner current loop of simple proportional control. The analysis shows that the outer voltage loop of PR control can track the instruction signal without static error, ensure the steady-state precision of the system and a certain capability against load current interference. The inner current loop has reliable rapidity and stability. Finally, Matlab was used to simulate the system and the hardware platfoml was lapped. The simulation and experimen verified the feasibility of the topology and control method.