基于二自由度PI控制的逆变器研究  

Researches for Inverters Based on Two-freedom-degree PI Controller

作　　者：袁义生[1] 胡根连 袁世英[1] 

机构地区：[1]华东交通大学电气学院,江西南昌330013

出　　处：《电力电子技术》2017年第11期57-60,共4页Power Electronics

基　　金：国家自然科学基金(51467005);江西省重点研发计划(20171BBE50018)~~

摘　　要：逆变器带不同类型负载时,传统的双环控制器中电压环控制器无法仅用一套比例积分(PI)参数兼顾电压跟踪和抗负载扰动性能。故在此提出一种基于二自由度PI控制的设计方案。在一台负载为250 W的样机上进行实验,分别采用传统控制和二自由度PI控制方法比较了带R载、RL载和RC载的效果。在RL载和RC载下,传统控制对输出电压的控制效果不太好,输出电压出现了明显振荡。但二自由度PI控制模式下,输出电压能保持很好的正弦度,在投载瞬间也能具有良好的动态特性,从而验证了理论的正确性和有效性。When the inverter is equipped with different types of load, the voltage loop controller in the traditional double loop controller can use a set of proportional integral （PI） parameters for voltage tracking and anti load disturbance performance.Thus a design scheme based on two-freedom-degree PI controller is presented.On the test of a pro- totype with a load of 250 W, the effects of R load, RL load and RC load are compared with conventional control and two-freedom-degree PI control methods.Under the load of RL and RC, the control effect of the traditional control on the output voltage is not very good, and the output voltage has obvious oscillation.However, under the two-freedom-degree PI control mode, the output voltage can maintain a good sine wave, and can also have a good dynamic characteristic at the moment of loading, which verifies the correctness and validity of the theory.

关 键 词：逆变器 双环控制 二自由度 系统稳定性 

分 类 号：TM46[电气工程—电器]