逆变器电压电流双环控制设计及研究  

Design and Research of Voltage and Current Dual-loop Control for Inverters

作　　者：孙静[1] 曹炜[1] 苏虎[1] 杨道培[1] 

机构地区：[1]上海电力学院电气工程学院,上海200090

出　　处：《上海电力学院学报》2015年第2期121-126,共6页Journal of Shanghai University of Electric Power

基　　金：国家863高技术基金(2011AA05A106)

摘　　要：在三相逆变器系统中,设计了电流内环、电压外环PI-PI控制器.根据逆变器及其控制系统的结构建立了双环控制系统简化数学模型,确定了传递函数.引入工程算法设计了电流内环,用bode图、阶跃响应优化了电流内环和电压外环的设计参数.将PI-PI控制系统置于Matlab/Simulink中进行时域仿真,对比分析了该控制系统与P-PI控制系统的性能.结果表明,所设计的PI-PI控制系统提高了逆变器系统稳态性能,改善了电压质量,限制了短路电流大小.The PI controller is used in both inner current loop and outer voltage loop in the three-phase inverter system. On the basis of structure of inverter and its control system, diagram and transfer function of the dual-loop controller are deduced. The inner current loop is designed with engineering algorithm and the outer voltage loop and inner current loop are optimized with both bode diagram and step response. The performances of previously designed dual-loop controller is verified by time domain simulation of the whole system on the platform of Matlab/simulink compared with the P-PI controller at the same system scheme. The simulation results show the designed dual-loop PI-PI controller not only enhances steady state performance of the system, but also improves the voltage quality and limits the current.

关 键 词：PI-PI控制 工程算法 BODE图 阶跃响应 电压质量 过流限制 

分 类 号：TM464[电气工程—电器] TM933.4