一种新型电流跟踪控制方法稳定性判据  

Stability Criterion of a New Current Tracking Control Method

作　　者：田刚领 蔚泉清 张柳丽 牛哲荟 TIAN Gang-ling;YU Quan-qing;ZHANG Liu-li;NIU Zhe-hui(Ping Gao Group Co.,Ltd.,Pingdingshan 467001,China)

机构地区：[1]平高集团有限公司,河南平顶山467001

出　　处：《电力电子技术》2020年第3期12-14,19,共4页Power Electronics

基　　金：国家重点研发计划项目(2018YFB0905500)。

摘　　要：针对一种并网大功率储能变流器电流跟踪控制方法提出稳定性判据。该控制方法能在保证变流器开关频率恒定的前提下实现并网电流与指令电流零误差跟踪。但该方法存在跟踪失步问题,最终导致变流器输出电流无法跟踪指令电流,产生系统不稳定现象。在此研究了该控制方法的跟踪失步机理,提出稳定性判据,为大功率储能变流器参数设计和工程化应用提供了理论支撑。利用Matlab构建仿真平台进行仿真研究,并搭建直流母线500 V低压实验平台进行稳定性判据的实验研究,结果验证了理论分析的正确性和判据的可行性。A stability criterion for current tracking control method of a grid-connected high-power storage converter is presented.This control method can achieve zero error tracking between grid-connected current and instruction current on the premise of constant switching frequency of converter.However,this method has the problem of tracking out-ofstep,which ultimately leads to the output current of converter can not track instruction current,resulting in system instability.The tracking out-of-step mechanism of the control method is studied,and the stability criterion is proposed,which provides theoretical support for parameter design and engineering application of high-power energy storage converter.An experimental study on stability criterion of 500 V DC bus is carried out.The results verify the correctness of theoretical analysis and the feasibility of the criterion.

关 键 词：储能变流器 电流跟踪控制 稳定性判据 

分 类 号：TM46[电气工程—电器]