Analysis and Protection of Single-phase-to-ground Fault on Valve Side of Interface Transformer in VSC-HVDC System with Symmetrical Monopolar Configuration

被引：0
|
作者：
Mei N. [1 ]
Yuan B. [1 ]
Yue B. [1 ]
Chen Z. [1 ]
Li T. [1 ]
机构：
[1] State Grid Economic and Technological Research Institute Co., Ltd., Beijing
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2020年 / 44卷 / 21期
基金：
国家重点研发计划;
关键词：
Fault mechanism; Interface transformer; Protection; Single-phase-to-ground (SPG) fault; Symmetrical monopolar configuration; Valve side; Voltage source converter based direct current (VSC-HVDC);
D O I：
10.7500/AEPS20200209004
中图分类号：
学科分类号：
摘要：
Voltage source converter based high voltage direct current (VSC-HVDC) project is developed towards high voltage and large capacity in recent years. However, the withstand voltage and current levels of the corresponding main equipment cannot rise linearly. Thus, it is urgent to carry out analytical analysis on the fault mechanism and reduce the transient stress requirements of the main equipment through the accurate coordination of the faults and protections. Taking the single-phase-to-ground (SPG) fault on the valve side of the interface transformer as an example, the analytical expressions of sequence components of the voltage/current and the measured values of the voltage/current at typical measurement locations in VSC-HVDC system after the fault are given, followed by the analysis on the fault mechanism. On this basis, the problems of the differential protection applied to detect the SPG fault on the valve side of the interface transformer in VSC-HVDC system with symmetrical monopolar configuration are presented. According to the configuration modes of the interface transformers, the zero-sequence overvoltage protection and the neutral-point overcurrent protection on the valve side of the interface transformer are suggested as the main protections to detect the SPG fault. With the electromagnetic transient simulation of a real VSC-HVDC project, the validity of the fault mechanism analytical studies and the adaptability of the protections are verified. © 2020 Automation of Electric Power Systems Press.
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页码：116 / 122
页数：6
相关论文
共 21 条
  • [1] WU Fangjie, MA Yulong, MEI Nian, Et al., Design of main connection scheme for Zhoushan flexible multi-terminal HVDC transmission project, Power System Technology, 38, 10, pp. 2651-2657, (2014)
  • [2] LI Chao, YAN Yunsong, XIONG Jun, Et al., Design and application of AC/DC coordinated control system in Southwest power grid of China, Automation of Electric Power Systems, 44, 8, pp. 200-206, (2020)
  • [3] LI Jian, WANG Biao, LIU Chengzhuo, Et al., Suppression scheme for ultra-low frequency oscillation based on frequency limit controller, High Voltage Engineering, 45, 7, pp. 2126-2133, (2019)
  • [4] ADIL A, EMIR I., DolWin1-challenges of connecting offshore wind farms, IEEE International Energy Conference (ENERGYCON), (2016)
  • [5] MAGG T G, AMPUTU F, MANCHEN M, Et al., Zambezi (previously caprivi) link HVDC interconnector: review of operational performance in the first five years, CIGRE Scb4 Colloquium, (2016)
  • [6] WANG Shanshan, ZHOU Xiaoxin, TANG Guangfu, Et al., Analysis of submodule overcurrent caused by DC pole-to-pole fault in modular multilevel converter HVDC system, Proceedings of the CSEE, 31, 1, pp. 1-7, (2011)
  • [7] QUE Bo, LI Jihong, WANG Nannan, Et al., Arm damping based quick recovery scheme for flexible HVDC fault, Automation of Electric Power Systems, 40, 24, pp. 85-91, (2016)
  • [8] WANG Nannan, JIANG Chongxue, WANG Jiacheng, Et al., Fault elimination strategy of symmetric single-pole VSC-MTDC based on DC circuit breaker, Automation of Electric Power Systems, 43, 6, pp. 122-128, (2019)
  • [9] LI Yan, GONG Yanfeng, Suppression of reclosing overcurrent and overvoltage of flexible DC grid, Automation of Electric Power Systems, 43, 5, pp. 107-113, (2019)
  • [10] QIU Peng, ZHANG Shujun, HUANG Xiaoming, Et al., Research on the protection strategies of internal AC bus fault based on MMC-HVDC, Power System Protection and Control, 42, 19, pp. 150-154, (2014)
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