中国电机工程学报Issue(9)：1353-1359,7.DOI:10.13334/j.0258-8013.pcsee.2014.09.005
一种基于参考频率电网同步信号实时检测方法
A Real-time Detecting Method for Grid Synchronization Signals Based on Reference Frequency
摘要
Abstract
The grid synchronization signal detection is a key to control the converter to be connected to the grid for new energy. For the weak points of the phase-lock loop, a grid synchronization signal real-time detecting method based on reference frequency is proposed in the paper. Only to detect the single-phase grid-voltage operated with sine and cosine signals of reference frequency, the grid synchronization signal can be detected in case of the three phase grid distorted and unbalanced. For the big phase deviation of the synchronization signal caused by frequency fluctuation, to improve the low-pass filtering link a negative feedback and proportional control is introduced, and the phase deviation can be corrected in satisfied index. The theoretical and experimental study results verify that the method is correct and effective.关键词
电网同步信号/参考频率/频率偏移/相位偏移/校正Key words
grid synchronization signal/reference frequency/frequency fluctuation/phase deviation/correction分类
信息技术与安全科学引用本文复制引用
周林,晁阳,廖波,任伟,杨明,刘强..一种基于参考频率电网同步信号实时检测方法[J].中国电机工程学报,2014,(9):1353-1359,7.基金项目
国家863高技术基金项目(2011AA05A301).@@@@The National High Technology Research and Development of China 863 Program (2011AA05A301) （2011AA05A301）
