| 抽水蓄能电站发电机注入式定子接地保护方案 |
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| 引用本文： | 朱峥,陆于平.抽水蓄能电站发电机注入式定子接地保护方案[J].东南大学学报(自然科学版),2009,39(3). |
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| 作者姓名： | 朱峥 陆于平 |
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| 作者单位： | 1. 东南大学电气工程学院,南京210096;苏州供电公司,苏州215004
2. 东南大学电气工程学院,南京,210096 |
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| 摘 要： | 为了避免注入式定子接地保护在抽水蓄能机组启动过程中长时间被闭锁,对机组的启动过程及保护等效电路进行分析,得出抽水蓄能机组在变频启动过程中,若电机定子发生单相接地时,其低频分量会影响注入式定子接地保护的灵敏度.采用抽水蓄能电站发电机注入武定子接地保护方案可在电机频率与注入源频率接近时,提高故障接地电阻计算的准确度,并采用窄带通滤波器来减轻电机低频分量对保护的影响,扩大了保护运行范围.仿真结果表明,该方案可以较准确地计算出故障接地电阻,与传统方案相比提高了保护灵敏度,验证了方案的可行性和有效性.
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| 关 键 词： | 抽水蓄能发电机 注入式 定子接地保护 方案 |
Novel injection protection scheme for stator ground fault of pumped storage generator |
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| Zhu Zheng,LU Yuping.Novel injection protection scheme for stator ground fault of pumped storage generator[J].Journal of Southeast University(Natural Science Edition),2009,39(3). |
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| Authors: | Zhu Zheng LU Yuping |
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| Institution: | Zhu Zheng1,2 Lu Yuping1(1School of Electrical Engineering,Southeast University,Nanjing 210096,China)(2Suzhou Power Supply Company,Suzhou 215004,China) |
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| Abstract: | In order to avoid the injection protection being blocked for a long time during pumped storage generator start-up,the equivalent circuit and the start-up under motor circumstance are analyzed.It is observed that the sensitivity of a 20 Hz injection protection is influenced by the low frequency component when ground faults take place in the stator windings for the static frequency converter(SFC) start-up generator.A novel injection protection scheme for stator ground faults is proposed to improve grounding-r... |
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| Keywords: | pumped storage generator injection stator ground fault scheme |
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