柔性直流配电网过电压及避雷器配置研究Research on Overvoltage and Arrester Allocation in Flexible DC Distribution Network
苏宜靖,董立,唐律,丁月强,李子恒
SU Yijing,DONG Li,TANG Lyu,DING Yueqiang,LI Ziheng
摘要(Abstract)：
柔性直流配电网在运行过程中可能发生各类故障,故障产生的过电压又会对直流配电系统产生重大的影响。综合考虑各类可能发生的故障,如交流侧母线故障、直流阀厅内部故障、直流断路器误动作和直流配电线路故障等,统计得到系统各个关键位置的最大过电压水平。为了对过电压进行限制,选用两种避雷器布置策略实现对系统的保护,仿真表明避雷器配置能够有效降低系统过电压水平。参考仿真结果,并考虑一定的绝缘裕度,进一步确定了设备的绝缘水平。
Various faults may occur in the operation of flexible DC distribution network, and the overvoltage caused by faults, in turn, has an impact on the DC distribution system. In consideration of all possible faults such as AC side bus fault, the internal fault of DC valve hall, maloperation of DC circuit breaker, DC distribution line fault, the maximum overvoltage levels at each key position of the system are obtained. In order to limit the overvoltage, two kinds of arrester allocation strategies are selected to protect the system. Simulation results show that the arrester allocation can effectively reduce the overvoltage level of the system. Based on the simulation result and in accordance with a certain insulation margin, the insulation level of the equipment is determined.
关键词(KeyWords)：
柔性直流;直流配电网;避雷器;过电压;绝缘水平
flexible DC;DC distribution network;arrester;overvoltage;insulation level
基金项目(Foundation): 国网浙江省电力有限公司科技项目(5211DS15002W)
作者(Author):
苏宜靖,董立,唐律,丁月强,李子恒
SU Yijing,DONG Li,TANG Lyu,DING Yueqiang,LI Ziheng
DOI: 10.19585/j.zjdl.201903004
参考文献(References)：
- [1]赵彪,赵宇明,王一振,等.基于柔性中压直流配电的能源互联网系统[J].中国电机工程学报,2015,35(19):4843-4851.
- [2]江道灼,郑欢.直流配电网研究现状与展望[J].电力系统自动化,2012,36(8):98-104.
- [3]刘大鹏,程晓绚,苟锐锋,等.异步联网工程柔性直流换流站过电压与绝缘配合[J].高压电器,2015,51(4):104-108.
- [4]刘国伟,赵宇明,袁志昌,等.深圳柔性直流配电示范工程技术方案研究[J].南方电网技术,2016,10(4):1-7.
- [5]张哲任,徐政,薛英林.MMC-HVDC系统过电压保护和绝缘配合的研究[J].电力系统保护与控制,2013(21):58-64.
- [6]时伯年,赵宇明,孙刚.柔性直流配电网保护方案研究及实现[J].南方电网技术,2015,9(9):11-16.
- [7]EMHEMED A A S,BURT G M.An Advanced Protection Scheme for Enabling an LVDC Last Mile Distribution Net work[J].IEEE Transactions on Smart Grid,2017,5(5):2602-2609.
- [8]邓旭,王东举,沈扬,等.舟山多端柔性直流输电工程换流站内部暂态过电压[J].电力系统保护与控制,2013,41(18):111-119.
- [9]戴志辉,葛红波,严思齐,等.柔性直流配电网接地方式对故障特性的影响分析[J].电网技术,2017,41(7):2353-2362.
- [10]杨英,董舒怡,陈红坤,等.三种主接线方式下柔性直流输电系统换流站内部过电压仿真[J].南方电网技术,2015,9(7):2-10.
- [11]苏宜靖,胡列翔,许烽,等.柔性直流配电网系统操作过电压的研究[J].电网技术,2018,42(10):3196-3203.
- [12]徐玉韬,谈竹奎,谢百明,等.基于直流断路器的多端柔性直流配电网智能化保护配置[J].电力建设,2018,39(9):61-69.
- [13]许烽,李继红,朱承治,等.直流断路器对直流电网过电压特性的影响分析[J].浙江电力,2017,36(9):13-18.
- [14]马焕,姚为正,吴金龙,等.含桥臂阻尼的MMC-HVDC直流双极短路故障机理分析[J].电网技术,2017,41(7):2099-2106.
- [15]于亚男,金阳忻,江全元,等.基于RT-LAB的柔性直流配电网建模与仿真分析[J].电力系统保护与控制,2015,43(19):125-130.
- [16]付东,陈冰,张勇军.柔性直流配电网的连接方式与建模综述[J].广东电力,2018,31(4):1-8.