500kV电网分布式限流方案  

Distributed Current-limiting Scheme for 500 kV Power Grid

作　　者：黄智慧[1] 王蕾 邹林 尹大伟 李锐海 邹积岩[1] HUANG Zhihui;WANG Lei;ZOU Lin;YIN Dawei;LI Ruihai;ZOU Jiyan(School of Electrical Engineering,Dalian University of Technology,Dalian 116024,China;Electric Power Research Institute,China Southern Power Grid Company,Guangzhou 510080,China;Anhui Electric Power Egrid Equipment Co.,Ltd.,Hefei 230088,China)

机构地区：[1]大连理工大学电气工程学院,大连116024 [2]南方电网科学研究院有限责任公司,广州510080 [3]安徽伊格瑞德电气设备有限公司,合肥230088

出　　处：《高电压技术》2020年第12期4291-4299,共9页High Voltage Engineering

基　　金：国家自然科学基金(51777025);南方电网科学研究院有限责任公司科技项目(0002200000037086;0002200000037095)。

摘　　要：针对500 kV电网短路电流超标问题,提出了基于故障电流捕捉型限流器的电网分布式限流方案。通过理论分析确定了限流模块的布置方案和动作模式。通过仿真对比分析了限流模块选相动作和随机动作的特性和模块两端过电压,继而提出了限流模块的配置方法。并根据广东电网500 kV变电站增城站的实际参数,利用PSCAD软件搭建了增城站模型,对各种工况下的限流情况进行了仿真。仿真结果表明,提出的分布式限流方案可将增城站短路电流限制在63 kA以下,且不会出现过电压,能够提高输电线路的阻抗水平,可以双向限流,提高整个电网的稳定性。Aiming at the problem that short-circuit currents in 500 kV grid may exceed the standard limits, a distributed current-limiting scheme based on fault current capture type current limiter is proposed. Through theoretical analysis, the layout scheme and action mode of current limiting module are determined. The characteristics of controlled & random switching and the overvoltage at both ends of the current limiting module are analyzed by simulation and comparison, then the configuration method of current-limiting module is proposed. Based on the actual parameters of Zengcheng 500 kV station in Guangdong province, a power system model is built by using the PSCAD software. The simulation of current limiting under various working conditions is carried out. The simulation results show that the proposed distributed current limiting scheme can limit the short circuit current of Zengcheng station to less than 63 kA without overvoltage, improve the impedance of transmission lines, limit the bi-directional current, and improve the stability of the whole grid.

关 键 词：分布式限流 故障限流器 快速真空开关 过电压 500 kV电网 

分 类 号：TM471[电气工程—电器]