电力系统自动化2013，Vol.37Issue(2)：119-124,6.DOI:10.7500/AEPS201111198
基于可控短路技术的系统阻抗测量方法在孤岛检测中的应用
A Novel Method of Impedance Measurement Used in Islanding Detection Based on Controllable Short-circuit Technology
摘要
Abstract
It is very important for a distributed generating system to have an effective islanding detection component. A new and effective islanding detection scheme is proposed. The scheme includes a thyristor placed between any two phases just by the port of a distributed generator (DG). An artificial short time phase-to-phase short circuit is formed by triggering the thyristor periodically, so the short-circuit current and voltage pulse can be extracted. Because of this, the frequency response of system can be acquired according to the theory of harmonic impedance, so that the impedance measured from DG port can be obtained. Whether the DG is islanding can be determined quickly by monitoring the changes of this impedance. At the same time, disturbances between different DG' s detecting signals are analyzed. This method is proved to be correct and effective by theoretical analysis, simulation and mockup experiment.关键词
分布式电源/孤岛检测/晶闸管/谐波阻抗Key words
distributed generator (DG) / islanding detection/ thyristor/ harmonic impedance引用本文复制引用
朱珂,卢晓惠,于青,韩耀鹏,张波..基于可控短路技术的系统阻抗测量方法在孤岛检测中的应用[J].电力系统自动化,2013,37(2):119-124,6.基金项目
山东省自然科学基金资助项目(Z2008F10). （Z2008F10）
