电气化铁路对微机保护装置选相元件的影响研究  

Research of the electrified railway influence on the phase selector in digital protection

作　　者：刘源[1] 于群[1] 薛劲莹[2] 罗邦云 李琰[3] 彭东虎 国翠 

机构地区：[1]山东科技大学电气与自动化工程学院,山东青岛266590 [2]新疆哈密电业局,新疆哈密839000 [3]中国电力科学研究院,北京100192

出　　处：《电力系统保护与控制》2014年第16期127-132,共6页Power System Protection and Control

摘　　要：研究了电气化铁路对电力系统220 kV输电线路微机保护装置选相元件的影响。根据某地区电网实际参数,在PSCAD中分别搭建了电力机车模型,基于相电流差突变量和序分量原理的微机保护装置选相元件模型。在PSCAD仿真中,相电流差突变量选相元件在不同工况下均能正确选出故障相,序分量选相元件在电铁功率较大时不能正确选出故障相,故电气化铁路对相电流差突变量选相元件影响较小,为在电气化铁路运输任务较重地区装设选相元件提供了理论依据。This paper researches the influence of electrified railway on phase selector of digital protection device of 220 kV power transmission line in power system. According to the actual parameters of a regional power system, the electric locomotive model, the phase current difference superimposed phase selector model and the sequence component phase selector model are built in PSCAD. In PSCAD simulation, the phase current difference superimposed phase selector model can correctly select the fault phase in different conditions and the sequence component phase selector model can＇t select the fault phase when the electric railway power is larger, so this paper reaches the conclusion that electrified railway on the phase current difference superimposed phase selector has little effect. It provides principle for installation the phase selection element in the electric railway transportation of heavy task area.

关 键 词：电气化铁路 微机保护 PSCAD 序分量选相 突变量选相 

分 类 号：U223[交通运输工程—道路与铁道工程] TM774[电气工程—电力系统及自动化]