逆变器控制策略对比分析和仿真验证

PWM逆变器是电力领域的重要设备,而输出电压波形控制是PWM逆变器的关键技术之一.波形控制的目标是消除波形畸变,并保证波形的高稳态精度和快速动态响应.本文首先建立单相PWM逆变器的数学模型,分析桥臂点电压和输出电流对逆变器输出电压波形的影响,然后对单电压环控制策略和电感电流反馈、电感电流反馈+负载电流前馈解耦以及电容电流反馈这3种双环控制策略分别进行理论推导分析,最后在Matlab中进行一系列仿真验证,分析对比各控制策略的稳态和动态响应性能.

Comparative analysis and simulation on inverter control strategy

This paper focuses on the waveform control technique of single-phase PWM inverter. The mathematic mod-el of single-phase PWM inverter is first established. Then, theoretical analysis is conducted with single voltage loop control as well as three different dual-loop controls. Transfer functions and bode diagrams are used to describe the performances of different control strategies. Both steady state responses and dynamic performances of the control strategies are simulated with software Matlab for comparison purposes. From the simulation, the benefits and drawbacks of these strategies are spread out. This paper will give some suggestions on the waveform control strategies of PWM inverter.