摘要
针对加强线路绝缘能有效减少污闪事故、减小线路反击率但也可能会对变电站的绝缘配合构成威胁的情况,以瑞金220 kV变电站两种不同运行方式为例,建立了基于电磁暂态程序ATP-EMTP的仿真计算模型,计算了加强线路绝缘后雷电侵入波在变电站电气设备上产生的过电压或雷电流,研究了对变电站绝缘配合的影响。仿真计算结果表明,加强线路绝缘不会对该变电站绝缘配合构成威胁。
Strengthening line insulation is effective in reducing pollution flashover accident and lowering conversely-attack rates of the lines. But it may cause a threat to current insulation coordination. The numerical simulation calculation models of certain 220 kV substation and transmission lines were established for its two different operating modes by electromagnetic transient calculation program ATP-EMTP. The over-voltage and lightning current generated in the electrical equipments of the substation were calculated and effects of lightning intruding surge on insulation coordination in substation after strengthening line insulation were studied in this paper. The research shows that there is no threat to current insulation coordination if line insulation is strengthened.
出处
《水电能源科学》
2008年第2期160-163,共4页
Water Resources and Power
关键词
雷电侵入波
线路绝缘
绝缘配合
ATP—EMTP
lightning intruding surge
insulation of transmission lines
insulation coordination
ATP-EMTP
