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高压电器  2015 

基于PSCAD/EMTDC的呼辽±500 kV直流输电工程主设备故障仿真分析

DOI: DOI:10.13296/j.1001-1609.hva.2015.08.013, PP. 80-85

Keywords: 直流输电,主设备故障,PSCAD/EMTDC,故障识别

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Abstract:

为了研究呼辽±500kV直流输电工程主设备故障的电气特征,有效区分各主设备故障,利用电磁暂态仿真软件PSCAD/EMTDC建立了呼辽±500kV直流输电系统的详细模型,对高压直流输电系统主设备进行了详细介绍,并在此基础上对逆变侧主设备故障进行了仿真分析。仿真结果表明,交流滤波器故障后,逆变侧直流电压和电流变化很小。换流变压器故障后,逆变侧直流电压、电流持续振荡,系统失去稳定。平波电抗器发生短路故障后,逆变侧直流电流发生明显波动,且含有大量的谐波分量,逆变侧直流电压略微降低。最后,基于小波变换理论,分析和提取各故障情况下电气量的特征信息,有效地识别各类故障。

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