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.
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)
出处
《电测与仪表》
北大核心
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)
关键词
锁相环
变惯量
自适应
频率波动
PLL
variable inertia
adaptive
frequency fluctuation
作者简介
冯纯纯(1994-),女,硕士研究生,从事并网逆变器控制技术研究。Email:15262042556@163.com;杨龙月(1988-),男,硕士生导师,讲师,从事并网系统稳定性分析研究;郭锐(1993-),男,硕士研究生,从事并网逆变器控制技术研究;刘建华(1973-),男,硕士生导师,副教授,从事智能电网控制技术研究。
