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东南大学电气工程学院,江苏省南京市 210096
梅军(1971—),男,博士,副教授,主要研究方向:电力电子在电力系统中的应用、配电网自动化。E-mail:Mei_jun@seu.edu.cn
张丙天(1995—),男,通信作者,硕士研究生,主要研究方向:柔性直流配电技术、直流故障定位技术。E-mail:172634493@qq.com
朱鹏飞(1997—),男,硕士研究生,主要研究方向:柔性直流电网故障处理技术。E-mail:2102128904@qq.com
收稿日期:2021-03-30,
修回日期:2021-06-26,
网络出版日期:2021-11-15,
纸质出版日期:2021-12-25
移动端阅览
梅军,张丙天,朱鹏飞等.基于故障电流主动控制的柔性直流配电网故障定位方法[J].电力系统自动化,2021,45(24):133-141.
MEI Jun,ZHANG Bingtian,ZHU Pengfei,et al.Fault Location Method of Flexible DC Distribution Network Based on Active Control of Fault Current[J].Automation of Electric Power Systems,2021,45(24):133-141.
梅军,张丙天,朱鹏飞等.基于故障电流主动控制的柔性直流配电网故障定位方法[J].电力系统自动化,2021,45(24):133-141. DOI: 10.7500/AEPS20210330005.
MEI Jun,ZHANG Bingtian,ZHU Pengfei,et al.Fault Location Method of Flexible DC Distribution Network Based on Active Control of Fault Current[J].Automation of Electric Power Systems,2021,45(24):133-141. DOI: 10.7500/AEPS20210330005.
为了提高现有柔性直流配电网故障定位方法的性能,保证直流配电网供电可靠性以及故障后快速恢复供电,提出基于故障电流主动控制的柔性直流配电网故障定位方法。利用混合模块化多电平换流器(MMC)的高可控性,将故障电流分为阶段Ⅰ与阶段Ⅱ。阶段Ⅰ主要实现故障电流快速抑制并为阶段Ⅱ平滑过渡提供条件。阶段Ⅱ通过注入特定频率的高频反向电流,实现故障的精确定位。介绍了故障参考电流的设计方法。以非对称“手拉手”式双端直流配电网为典型场景分析其故障定位原理。最后,在PSCAD/EMTDC搭建双端直流配电网仿真模型,验证了所提故障定位方法的可行性。
In order to improve the performance of the existing fault location methods of flexible DC distribution networks
ensure the power supply reliability of DC distribution networks and quickly restore power supply after fault
a fault location method based on active fault current control is proposed. Using the high controllability of hybrid modular multilevel converters (MMCs)
the fault current is divided into stageⅠand stageⅡ. In stageⅠ
the rapid suppression of fault current is realized and conditions are provided for smooth transition to stage Ⅱ. In stage Ⅱ
the precise fault location is realized by injecting high-frequency reverse current with the specific frequency. The design method of fault reference current is introduced. Taking the asymmetric “hand-in-hand” double-terminal DC distribution network as a typical scenario
the fault location principle is analyzed. Finally
a simulation model of double-terminal DC distribution network is built in PSCAD/EMTDC to verify the feasibility of the proposed fault location method.
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