| 引用本文: | 王守相,禚程程,刘琪,杨景刚,陈庆.基于VSC的直流配电网限流电抗器位置和参数优化配置方法[J].电力自动化设备,2019,39(12): |
| WANG Shouxiang,ZHUO Chengcheng,LIU Qi,YANG Jinggang,CHEN Qing.Optimal allocation method for location and parameter of current-limiting reactor in VSC-based DC distribution system[J].Electric Power Automation Equipment,2019,39(12): |
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| 摘要: |
| 直流配电系统发生故障后故障电流快速上升，通过安装故障限流装置能有效降低故障电流上升的速率，减小故障电流的峰值，保护系统中的电力电子装置。基于电压源型换流器构建双端柔性直流配电网模型，分析直流配电系统发生极间短路故障的故障原理和故障特征，研究限流电抗器在不同接入位置的限流原理和效果。考虑到换流器耐流特性、保护装置及断路器动作特性，提出基于限流电抗器的故障限流位置和参数优化配置方法，并通过PSCAD/EMTDC平台进行仿真优化，从而确定故障限流电抗器的最优配置方案。 |
| 关键词: 直流配电网 极间短路故障 故障特征 故障限流 限流电抗器 |
| DOI：10.16081/j.epae.201911030 |
| 分类号:TM46;TM727 |
| 基金项目:国家重点研发计划资助项目(2018YFB0904700) |
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| Optimal allocation method for location and parameter of current-limiting reactor in VSC-based DC distribution system |
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WANG Shouxiang1, ZHUO Chengcheng1, LIU Qi1, YANG Jinggang2, CHEN Qing3
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1.Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China;2.Electric Power Research Institute of State Grid Jiangsu Electric Power Company, Nanjing 211100, China;3.State Grid Jiangsu Electric Power Company, Nanjing 210024, China
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| Abstract: |
| The fault current of DC distribution system rises rapidly after fault occurs, which brings impacts to the power electronic devices. By equipping with CLRs(Current-Limiting Reactors),the rising rate of fault current can be effectively suppressed, the peak value of the fault current can be reduced, and the power electronic devices of the system can be protected. An electrical-magnetic simulation model based on three-phase two-level VSC(Voltage Source Converter) is built. The fault principle and characteristics of pole-to-pole short circuit fault are explored, and the current limiting principle and effect of CLRs at different locations are studied. Considering the flow resistance characteristics of VSC and the action characteristics of protection devices, the method of optimizing the location and parameters for CLRs is proposed. The optimum configuration scheme of CLRs is determined by simulation optimization on PSCAD/EMTDC platform. |
| Key words: DC distribution network pole-to-pole short circuit fault fault characteristics fault-current limiting current-limiting reactor |
