智能电网 Smart Grid 第31卷第4期电网与清洁能源Vol.31No.4 2015年4月Apr. 2015 文章编号:1674-3814(2015)04-0047-07中图分类号:TM744文献标志码:A
220kV两相式电铁牵引l站供电线路的短路 故障计算及其保护整定原则分析
邱建,曾耿晖,李一泉,杨韵,屠卿瑞,朱峥 (广东电网电力调度控制中心,广东广州510600) Analysis ontheShortCircuitFault Calculation and theProtectionSetting Principlesof220kV Two-PhasePowerSupplyLines ofElectrifiedRailway QIU Jian, ZENG Genghui, LI Yiquan, YANG Yun, TU Qingrui, ZHU Zheng (ElectricPowerispatching andControlCenteofGuangdongPowerdCororation,Guangzhu510600,Guangdon,Chna)
ABSTRACT: This paper analyzes the characteristic of the short分析了各种重合闸方式的利整,给出了推荐的重合闸方式整 circuit impedance of single-phase traction transformer, and定原则。
calculates the short circuit fault of the twophase power supply关键词:两相式电铁供电线路;单相牵引变压器;短路故障计 line of the electrified railway based on the system equivalent算;保护整定原则 model. The result of the analysis suggests that pared with the mon three-phase power network, the impedance of在电铁牵引站供电模式中,采用单相牵引变压 single-phase traction transformer should multiply 0.5 as a器的两相供电模式中牵引变的容量利用率最高,但 conversion factor in the short circuit fault calculation and the其对电网影响较大-2。
随着电网的发展,电网容量 pnous sou kddns ramod asudom a jo aoudu peo迅速增大,这一制约条件已不存在。
因此,随着我国 multiply 0.866 as a conversion factor. Considering both the高速铁路的快速发展,两相供电模式的牵引站大量 protection configuration of the electried railway line and the接人220kV电压等级电网7,如近两年接入广东电 requirement of power system stability,this paper presents an网220kV电压等级的厦深铁路、贵广铁路等。
in-depth analysis on the main proteetion seting principles and由于两相供电模式与电网三相对称输电的差 puts forward the diffrentiated seting principles of distance protection,zero-sequence current protection and TV break-up异及单相牵引变压器与普通三相变压器在结构等 over-current protection.The paper also analyzes the advantages方面的差异,其短路故障计算、保护配置及整定等 and disadvantages of different reclosing modes and remends方面与电网常规线路存在较大差异。
而电网继电保 the setting principles for the reclosing.护人员对这一领域的相关技术还缺乏了解,如果仍 然按照电网常规短路故障计算方法进行计算,按照 railway; single -phase traction transformer; short circuit fault电网内的常规线路保护整定原则进行整...