Improved SMS islanding detection method for grid-connected converters

被引：87

作者：

Liu, F. ^{[1
]}

Kang, Y. ^{[1
]}

Zhang, Y. ^{[1
]}

Duan, S. ^{[1
]}

Lin, X. ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Coll Elect & Elect Engn, Wuhan 430074, Peoples R China

来源：

IET RENEWABLE POWER GENERATION | 2010年 / 4卷 / 01期

关键词：

DISTRIBUTED GENERATION SYSTEMS;

D O I：

10.1049/iet-rpg.2009.0019

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Islanding detection is a mandatory function for grid-connected converters. The popular slip mode frequency shift (SMS) and auto phase shift active islanding detection methods are investigated and an improved (IM)-SMS strategy is proposed in this study. In the proposed method, additional phase shift is introduced to help in stimulating the action of the islanding detection and the algorithm is simplified as well. When the utility grid is disconnected, the algorithm keeps the frequency of the converter output voltage deviating until the frequency protection relay is triggered. The working principle of the method is introduced and the guidance of parameters selection and optimisation is also provided. The islanding detection performance is evaluated through theoretical analysis and verified by digital simulation and experimental results. The IM-SMS method exhibits features of simplicity, easy implementation and high reliability.

引用

页码：36 / 42

页数：7

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