电力建设2018，Vol.39Issue(5)：70-76,7.DOI:10.3969/j.issn.1000-7229.2018.05.009
含逆变型分布式电源配电网的接地故障中性点电压分析及对策
Analysis on Neutral Point Overvoltage during Grounded Fault in Distribution Network with Inverter-interfaced DGs and Countermeasures
摘要
Abstract
Injection of a large number of inverter-interfaced distributed generators (DGs) has led to neutral point overvoltage and even caused vacuum breakdown,which makes it imminent to analyze neutral point overvoltage in detail,as well as to concern the protection configuration there. In this paper, sequence component theory is used to derivate and simplify theoretical calculation formulas of neutral point overvoltage before and after trip during fault,which is very simple and accurate and can be widely used in system planning and operation. On the basis of these formulas, main factors influencing overvoltage are analyzed and related protection configuration is proposed. Correctness of the formulas is verified by simulation in PSCAD,and the influencing factors of overvoltage such as output current of DGs are analyzed.关键词
分布式电源/单相接地故障/序分量/中性点过电压Key words
DG/phase to earth fault/sequence component/neutral point overvoltage分类
信息技术与安全科学引用本文复制引用
姜淼,徐光福,李正红,魏承志,陈俊..含逆变型分布式电源配电网的接地故障中性点电压分析及对策[J].电力建设,2018,39(5):70-76,7.基金项目
南方电网重点科技项目(ZDKJQQ2015012)This work is supported by Project supported by China Southern Power Grid Company Limited Research Program(ZDKJQQ2015012) （ZDKJQQ2015012）
