改进型DSC的并网锁相环直流偏移消除方法

doi:10.12068/j.issn.1005-3026.2018.11.002

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (11): 1526-1531.DOI: 10.12068/j.issn.1005-3026.2018.11.002

改进型DSC的并网锁相环直流偏移消除方法

回楠木¹，王大志¹，李云路²

(1. 东北大学信息科学与工程学院，辽宁沈阳110819; 2. 沈阳工业大学电气工程学院，辽宁沈阳110870)

收稿日期:2017-07-31 修回日期:2017-07-31 出版日期:2018-11-15 发布日期:2018-11-09
通讯作者: 回楠木
作者简介:回楠木(1982-)，男，辽宁鞍山人，东北大学博士研究生; 王大志(1963-)，男，辽宁锦州人，东北大学教授，博士生导师.冯明杰(1971-)，男，河南禹州人，东北大学副教授; 王恩刚(1962-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金重点资助项目(61433004); 国家重点研发计划项目(2017YFB130055).

DC-Offset Elimination Method for Grid-Connected Phase-Locked Loop by Modified DSC

HUI Nan-mu¹， WANG Da-zhi¹， LI Yun-lu²

1. School of Information Science & Engineering， Northeastern University， Shenyang 110819， China; 2. School of Electrical Engineering， Shenyang University of Technology， Shenyang 110870， China.

Received:2017-07-31 Revised:2017-07-31 Online:2018-11-15 Published:2018-11-09
Contact: HUI Nan-mu
About author:-
Supported by:
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摘要/Abstract

摘要： 针对在SRF-PLL的控制内环中使用延迟信号消除(DSC)算子，放缓了动态行为问题，提出了一种用于电网同步的三相PLL中的快速直流偏移抑制方法.通过使用改进型DSC运算器(MDSC)方法，改进了传统的基于DSC的PLL的动态性能.该方法能够有效地克服系统带宽给直流偏移消除带来的影响，并使系统响应速度得到提升.另外基于MDSC的PLL在相位跳变和频率阶跃变化的调整时间也很小.所提方法的有效性通过仿真实验结果得到证实.

关键词: 直流偏移, 同步参考坐标, 锁相环, 延迟信号消除, 相位估计

Abstract: The use of delay signal cancellation(DSC)operator in the control inner loop of SRF-PLL slows down the dynamic behavior. A fast DC-offset rejection method for three-phase PLL of grid synchronization is proposed， which improves the dynamic performance of traditional DSC-based PLL by using the modified DSC operator. This method can effectively overcome the influence of the system bandwidth on the DC-offset elimination and improve the response speed of the system. In addition， the adjustment time of the phase jump and frequency step change based on the MDSC-based PLL is also very small. The effectiveness of the proposed method is confirmed through simulation and experiment results.

Key words: DC-offset, synchronous reference flame, phase-locked loop, signal delay cancellation, phase estimation

中图分类号:

TM76

回楠木，王大志，李云路. 改进型DSC的并网锁相环直流偏移消除方法[J]. 东北大学学报:自然科学版, 2018, 39(11): 1526-1531.

HUI Nan-mu， WANG Da-zhi， LI Yun-lu. DC-Offset Elimination Method for Grid-Connected Phase-Locked Loop by Modified DSC[J]. Journal of Northeastern University Natural Science, 2018, 39(11): 1526-1531.

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改进型DSC的并网锁相环直流偏移消除方法

DC-Offset Elimination Method for Grid-Connected Phase-Locked Loop by Modified DSC

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