摘要
准确、快速地提取电网同步相位信息是并网逆变器正常工作的基本要求。为有效提取非电网环境下的相位信息,提出了一种可实现分级调试的新型锁相环技术。采用特定谐波消除的鉴相方式实现一级调试,在有效提取谐波污染下电网信息的同时大幅简化算法,提高锁相过程的快速性。加入低通滤波器从而能够对高频干扰信号产生衰减和抑制,以此作为二级调试。仿真结果表明,分级调试的新型锁相环,可在非理想电网环境下能够对电网同步相位的准确跟踪,干扰抑制能力强且同时适用于单相和三相并网系统。
It is the basic requirement of normal work for grid connected converter to accurately and fast acquire the synchronous phase. In order to effectively extract the phase information in the non grid environment,this paper proposes a new phase locked loop technology. The phase discrimination method using a specific harmonic elimination is used to realize the first level debugging,which can greatly simplify the algorithm and improve the speed of the phase lock process under the effective extraction of harmonic pollution. The low-pass filter is added to suppress the high frequency interference signal,which is used as the second level debugging. The simulation and experiment show that the hierarchical debugging of new phase locked loop technology,can achieve accurate tracking of grid synchronization phase in non ideal grid environment,strong ability to suppress interference and is suitable for both single-phase and three-phase grid connected system.
作者
袁庆庆
蔡继宽
宋斌
曾贤涛
Yuan Qingqing;Cai Jikuan;Song Bin;Zeng Xiantao(School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, Chin)
出处
《电子测量技术》
2018年第2期10-14,共5页
Electronic Measurement Technology
基金
安徽省高节能电机及控制技术国家地方联合工程实验室基金(KFKT201509)项目资助
关键词
锁相环
分级调试
特定谐波消除鉴相
低通滤波器
phase locked loop
hierarchical debugging
specific harmonic elimination
low pass filter
