统调动力源系统单相接地故障选线研究

doi:10.11930/j.issn.1004-9649.2017.05.039.07

中国电力 ›› 2017, Vol. 50 ›› Issue (5): 39-45.DOI: 10.11930/j.issn.1004-9649.2017.05.039.07

统调动力源系统单相接地故障选线研究

兀鹏越^{1, 2}, 焦尚彬³, 赵峰⁴, 寇水潮¹, 师延金³

1. 西安热工研究院有限责任公司,陕西西安 710054;
2. 西安西热节能技术有限公司,陕西西安 710054;
3. 西安理工大学,陕西西安 710048;
4. 华能威海发电有限责任公司,山东威海 264200

收稿日期:2017-02-26 出版日期:2017-05-20 发布日期:2017-05-26
作者简介:兀鹏越（1976—）,男,陕西蓝田人,硕士,高级工程师,从事发电厂电气技术研究工作。E-mail:wupengyue@tpri.com.cn
基金资助:
陕西省科技攻关项目（2017K18）; 陕西省教育厅产业化项目（2017JG09）; 西安热工研究院研发基金资助项目（ZE-16-TYK01）

Research on United Adjustment Power Source System Single Phase Ground Fault Line Selection

WU Pengyue^{1, 2}, JIAO Shangbin³, ZHAO Feng⁴, KOU Shuichao¹, SHI Yanjin³

1. Xian Thermal Power Research Institute Co., Ltd., Xian 710054, China;
2. Xian West Heat Energy Technology Co., Ltd., Xian 710054, China;
3. Xian University of Technology, Xian 710048, China;
4. Huaneng Weihai Power Plant Co., Ltd., Weihai 264200, China

Received:2017-02-26 Online:2017-05-20 Published:2017-05-26
Supported by:
This work is supported by Shaanxi Province Science and Technology Research Project(No. 2017K18); Shaanxi Provincial Department of Education Industrialization Project(No. 2017JG09), Xi’an Thermal Power Research Institute Research Fund Project(No. ZE-16-TYK01).

摘要/Abstract

摘要： 发电厂辅机统调动力源系统为非工频小电流接地系统,其单相接地故障常规保护装置及工频小电流接地选线装置均无法正确识别。文中分析了统调动力源系统的运行工况,计算了单母线低频率的极端工况下最小接地电容电流数值,据此提出研制非工频小电流接地选线装置的技术要求,并开发出高精度、能够适应系统频率变化的发电机统调动力源接地选线装置。设计了专用的功能及性能模拟测试电路对装置进行检测,结果表明,该装置完全满足设计要求,投运后运行良好,解决了工程难题。

关键词: 非工频, 小电流接地, 故障选线

Abstract: The power plant auxiliary machine united adjustment power source system is non-utility frequency and small current grounding system. Conventional protection device cannot detect single phase grounding fault in the system correctly. Operating conditions of united adjustment power source system is analyzed, and minimum capacitive ground fault current value is calculated in single busbar low frequency operating condition. Based on calculation, technical requirements of non-utility frequency low current grounding fault line selection device is proposed. Then a high precision fault line selection device which adaptive to system frequency changes is developed. A special functionality simulation test circuit is also built to test developed device. The testing results show that proposed device satisfies design requirements, works well after commissioning and solves practical engineering problem.

Key words: non-utility frequency, low current grounding, fault line selection

中图分类号:

TM774

兀鹏越, 焦尚彬, 赵峰, 寇水潮, 师延金. 统调动力源系统单相接地故障选线研究[J]. 中国电力, 2017, 50(5): 39-45.

WU Pengyue, JIAO Shangbin, ZHAO Feng, KOU Shuichao, SHI Yanjin. Research on United Adjustment Power Source System Single Phase Ground Fault Line Selection[J]. Electric Power, 2017, 50(5): 39-45.

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统调动力源系统单相接地故障选线研究

Research on United Adjustment Power Source System Single Phase Ground Fault Line Selection

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