一种自适应变惯量同步锁相控制策略  

An adaptive variable inertia synchronous phase-locked control strategy

作　　者：冯纯纯 杨龙月 郭锐 刘建华 Feng Chunchun;Yang Longyue;Guo Rui;Liu Jianhua(School of Electrical and Power Engineering,China University of Mining and Technology,Xuzhou 221008,Jiangsu,China)

机构地区：[1]中国矿业大学电气与动力工程学院

出　　处：《电测与仪表》2020年第1期131-135,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51607179);中央高校基本科研业务费专项资金(2017QNB01)

摘　　要：对于传统的基于同步参考坐标系锁相环(SRF-PLL),电网电压相位非正常变化直接影响频率估计。文章分析了控制器参数对相位与频率的耦合关系影响,提出了一种变惯量同步锁相环(VISRF-PLL)。利用输入频差构建自适应函数,动态调整频率估计环节时间尺度,减弱前向通道的耦合效应。仿真与实验结果表明,所提方法能够降低过渡过程频率波动,提高系统响应速度,更适合频率敏感型变流器。For the traditional phase-locked loop based on synchronous reference frame(SRF-PLL),the frequency estimation is directly affected by abnormal changes of grid voltage phase. In this paper,the influence of controller parameters on the coupling relationship between phase and frequency is analyzed and a variable inertia synchronous reference frame phase-locked loop(VISRF-PLL) is proposed in this paper. The input frequency error is used to construct an adaptive function,which dynamically adjusts the time scale of frequency estimation link and weakens the coupling effect of forward channel variables. The results of simulation and experiment show that the proposed method can reduce the frequency fluctuation in the transition process and increase the response speed of the system. It is more suitable for frequency sensitive converters.

关 键 词：锁相环 变惯量 自适应 频率波动 

分 类 号：TM93[电气工程—电力电子与电力传动]