摘要
防孤岛保护是并网发电系统的必备功能,目前的孤岛检测方法主要有电网侧检测、外部开关电容检测、逆变器侧检测3大类,其中逆变器侧检测又可分为被动检测和主动检测。阐述了孤岛效应产生的机理和检测盲区出现的原因,在此基础上,对孤岛检测方法进行分类,并重点介绍了基于逆变器侧的各种被动检测法、主动检测法的原理,分析了它们的特点和适用的场合,最后介绍了不同国家依据不同标准所采取的检测方法。研究结果表明每种检测方法各有优缺点,实际应用中,应将至少各一种主动检测法和被动检测法结合使用,以此获得更好的检测效果。
The protection against islanding is an essential function of connected-grid system,islanding detection can be divided into three categories of the grid side,the external switches of capacitance and the inverter side,and the methods of inverter side also contains two kinds of active and passive.This paper describes the mechanism for islanding and the reason of non-detection zone,on the basis of above,islanding detection methods are classified,introducing the principles of passive and active based on inverter side,and their characteristics and applicable occasions are analyzed.Finally,the detection methods based on different standards in different countries are presented.The results of the study show that every method has its advantages and disadvantages,in actual application,an active detection and a passive detection method should be used in combination at least,in order to obtain better detection effect.
出处
《国外电子测量技术》
2015年第8期34-39,共6页
Foreign Electronic Measurement Technology
