[1]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):508-513.[doi:10.3969/j.issn.1001-0505.2009.03.017]
 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):508-513.[doi:10.3969/j.issn.1001-0505.2009.03.017]
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抽水蓄能电站发电机注入式定子接地保护方案()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第3期
页码:
508-513
栏目:
电气工程
出版日期:
2009-05-20

文章信息/Info

Title:
Novel injection protection scheme for stator ground fault of pumped storage generator
作者:
朱峥12 陆于平1
1 东南大学电气工程学院, 南京 210096; 2 苏州供电公司, 苏州 215004
Author(s):
Zhu Zheng12 Lu Yuping1
1 School of Electrical Engineering, Southeast University, Nanjing 210096, China
2 Suzhou Power Supply Company, Suzhou 215004, China
关键词:
抽水蓄能发电机 注入式 定子接地保护 方案
Keywords:
pumped storage generator injection stator ground fault scheme
分类号:
TM77
DOI:
10.3969/j.issn.1001-0505.2009.03.017
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式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.
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-resistance calculation accuracy when the frequency of the motor is close to that of the injection power, and a narrow bandpass digital filter is designed to mitigate influences from the low frequency components of the motor, which enlarges the protection range. The simulation results show that the ground resistance can be calculated accurately, the sensitivity is increased compared with the traditional scheme, and the effectiveness and practicability of the scheme are verified.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 朱峥(1983—),男,硕士; 陆于平(联系人),男,博士,教授,博士生导师,luyuping@seu.edu.cn.
引文格式: 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):508-513. [doi:10.3969/j.issn.1001-0505.2009.03.017]
更新日期/Last Update: 2009-05-20