摘要
随着分布式发电的迅速发展,越来越多的可再生能源被转化为电能通过并网逆变器输送到电网。并网逆变器要求具备孤岛检测功能,通常对其输出施加一定的扰动以提高孤岛检测能力。目前对光伏并网逆变器的研究主要集中于单机,而本文从多机并网运行的角度对孤岛检测方法进行了研究。针对并网逆变器所常用的移频与移相两类主动孤岛检测技术在多逆变器并联工作下的相互联系及内在影响进行了深入分析。同时给出这两类方法下的逆变器孤岛检测设计注意事项及孤岛算法参数选取方法,从而为多机光伏并网逆变器孤岛检测提供了理论指导。
Due to the development of distributed generation,grid-connected converters are widely employed for renewable energy sources utilization.The islanding detection is a mandatory function for such converters.It usually injects perturbations in the converters＇ output to improve islanding detection effectiveness.The current research is mainly focusing on the islanding detection of individual converter.This paper is dedicated to investigating the strategies for multiple PV grid-connected converters operation.The characteristics of normally used active frequency shift and active phase shift islanding detection methods in multiple converters system are explored.The design principle and parameters selection rule of the two strategies are also presented.It provides basic islanding detection design guidance for multiple PV grid-connected converters system.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第1期167-171,共5页
Transactions of China Electrotechnical Society
基金
台达电力电子科教发展基金资助项目(DREG2008008)
国家自然科学基金重点资助项目(50837003)
关键词
并网逆变器
光伏
孤岛检测
移频
移相
Grid-connected converter PV islanding detection frequency shift phase shift
