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PROTECTION SCHEME BASED ON FAULT TRANSIENT COMPONENT OF THIRD HARMONIC VOLTAGE FOR STATOR GROUND FAULT OF GENERATORS
Author(s): 
Pages: 45-49
Year: Issue:  13
Journal: AUTOMATION OF ELECTRIC POWER SYSTEMS

Keyword:  发电机保护定子接地保护3次谐波电压故障分量;
Abstract: 在分析发电机定子单相接地故障产生的故障暂态分量信息特征的基础上,提出了一种定子单相接地暂态保护方案.该保护方案根据单相接地故障后机端和中性点3次谐波电压的故障暂态分量近似相同的特点,把两个故障分量的相量和与相量差分别作为保护动作信号及制动信号,通过比较数据窗内相应信号的谱能量检测定子单相接地故障.仿真和试验结果表明新的暂态保护判据灵敏度高,不受发电机运行工况的影响,具有较好的鲁棒性.
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