A Novel Protection and Location Scheme for Pole-to-Pole Fault in MMC-MVDC Distribution Grid
A Novel Protection and Location Scheme for Pole-to-Pole Fault in MMC-MVDC Distribution Grid
复制标题
MMC-MVDC配电网极间故障保护与定位新方案
作者：
曾钰;邹贵彬;魏秀燕;孙辰军;蒋灵通
Nowadays, the efficient and reliable protection and location schemes for MMC-MVDC (Modular Multilevel Converter-Medium Voltage Direct Current) grid are few. This paper is the first to propose a scheme to not only protect the feeders and the busbar, but locate the segments in MMC-MVDC grid. To improve the reliability, this paper analyzes the transient characteristics of the pole-to-pole fault and then obtains the characteristic frequency band. Based on S-transform, STCFB (S-transform characteristic frequency band) Phase of fault component is utilized to construct the identification criterion for faulty feeder and faulty segment. The whole scheme can be divided into three steps, namely, protection starting criterion, faulty feeder and busbar protection criterion, and faulty segment location criterion. Firstly, the current gradient method is utilized to quickly detect the fault and start the protection device. Secondly, the non-unit protection criterion on busbar and feeders is proposed according to STCFB Phase of the voltage and current fault component. Thirdly, according to the STCFB Phase on both sides of the feeder segment, the faulty segment can be located. A radial MMC-MVDC distribution network model was built in PSCAD/EMTDC software to evaluate the performance of the protection and location method. Simulation results for different cases demonstrate that the proposed scheme has high accuracy, good adaptability and reliability.
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影响因子：
4.4
作者：
Jeremy Sneath;A. Rajapakse
通讯作者：
Jeremy Sneath;A. Rajapakse
影响因子：
2.5
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影响因子：
4.4
作者：
Jin Yang;John E. Fletcher;J. O'Reilly
通讯作者：
Jin Yang;John E. Fletcher;J. O'Reilly
影响因子：
3.2
作者：
M. Mehrasa;E. Pouresmaeil;S. Zabihi;J. C. T. Caballero;J. Catalão
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MVDC配电网中基于参数辨识的单极接地故障馈线检测方法
DOI：
10.1016/j.ijepes.2017.10.039
发表时间：
2018-04
影响因子：
5.2
作者：
Song Guobing;Luo Juan;Gao Shuping;Wang Xiaowei;Kazmi Tassawar
通讯作者：
Kazmi Tassawar