合闸750kV空载变压器引起的系统电压暂降现场实测与计算分析Analysis on Field Measured System Voltage Sag Caused by Energizing 750kV No-Load Transformer and Its Simulation Comparison
郑彬;班连庚;周佩朋;张健;印永华;赵红光;郭强;何凤军;牛栓保;常喜强;
摘要(Abstract):
结合新疆与西北750 kV联网工程乌北变电站合闸750 kV空载变压器现场实施情况,分析了合闸空载变压器引起系统工频电压暂降现象的机制,提出励磁涌流及系统短路容量是影响合空变电压暂降的主要因素。并利用EMTP工具对合空变引起的电压暂降进行仿真建模分析,得出的合空变励磁涌流及系统电压暂降特性与现场实测基本一致,验证了仿真方法的有效性。提出了采取断路器装设合闸电阻的措施可以有效抑制合空变操作引起的系统电压暂降,另外采取系统调压、调整系统运行方式、消除剩磁等措施也有助于缓解合空变电压暂降对系统运行造成的不利影响。
关键词(KeyWords): 空载变压器;励磁涌流;电压暂降
基金项目(Foundation):
作者(Author): 郑彬;班连庚;周佩朋;张健;印永华;赵红光;郭强;何凤军;牛栓保;常喜强;
Email:
DOI: 10.13335/j.1000-3673.pst.2012.09.029
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