LC型逆变器的改进双环控制策略  

Improved Dual-loop Control Strategy for LC Type Inverters

作　　者：刘秋华[1] 周维初 Liu Qiuhua;Zhou Weichu(Nanjing Institute of Technology,Nanjing Jiangsu 211167,China)

机构地区：[1]南京工程学院,江苏南京211167

出　　处：《电气自动化》2023年第5期23-26,共4页Electrical Automation

摘　　要：为提高LC型逆变器的性能,提出了一种改进电压电流双环控制策略。首先,分析了传统电压电流双环控制策略。在此基础上,为提高电流环的响应速度,当电流跟踪误差较大时采用bangbang控制;为兼顾稳态精度,当电流误差较小时切换为PI控制。然后,通过实时跟踪电压环积分器预测状态值,使电压误差按指数收敛,从而消除了阶跃指令下和负载突变时的电压超调。经MATLAB/Simulink平台仿真试验验证所提改进控制策略的正确性和可行性。In order to improve the performance of LC inverter,an improved voltage and current dual-loop control strategy was proposed.Firstly,the traditional voltage current dual-loop control strategy was analyzed.On this basis,in order to improve the response speed of the current loop,bangbang control was used when the current tracking error was large;in order to take into account the steady-state accuracy,when the current error was small,it was switched to proportional integral control.Then,by tracking the predicted state value of the voltage loop integrator in real time,the voltage error converged exponentially,so as to eliminate the voltage overshoot under the step command and when the load changed suddenly.The MATLAB/Simulink platform simulation test proved the correctness and feasibility of the proposed improved control strategy.

关 键 词：双环控制 bangbang控制 积分器状态值预测跟踪 逆变器 滤波器 

分 类 号：TM464[电气工程—电器]