周浩;余宇红;张利庭;张元龙;楼其民;

• 1:浙江大学电气工程学院
• 2:浙江大学电气工程学院
• 3:嘉兴市电力局
• 4:嘉兴市电力局

摘要(Abstract)：

在中性点不接地配电系统中,由于电磁式电压互感器(PT)励磁电感的非线性特性,在一定条件下容易产生铁磁谐振过电压,严重影响系统的安全运行。文章以嘉兴电力局斜桥变电所10kV配电网为模型,利用EMTP程序对PT高压侧中性点接非线性电阻、串单相PT、经消弧线圈接地、PT开口三角绕组接阻尼电阻或者分频消谐装置等多种消谐措施进行了详细的仿真分析和综合比较,发现中性点串单相PT的方式在消谐能力和全局性方面不如中性点串非线性电阻方式;在非线性电阻消谐方式下,正温度系数(PTC)热敏电阻和三次谐波滤波器可以较好地解决零序电压偏高的问题。此外,文章还定量研究了采用消弧线圈消谐的有效数值范围,分析了分频消谐装置在实际运行中不能很好消谐的原因,并对其他一些消谐方式的有效性进行了探讨。作者的工作可以为电力部门进行铁磁谐振过电压的防治提供较好的参考依据,对提高配电网的供电安全可靠性也有很高的实用价值。

关键词(KeyWords)： 铁磁谐振;非线性电阻;单相PT;消弧线圈;阻尼电阻;仿真研究;配电网

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 周浩;余宇红;张利庭;张元龙;楼其民;

Email:

DOI: 10.13335/j.1000-3673.pst.2005.22.005

参考文献(References)：

• [1] Araujo A E A, Soudack A C, Marti. J R. Ferroresonance in power systems: chaotic behaviour[J] . IEE Proceedings-Generation, Transmission and Distribution, 1993, 140(3): 237-240.
• [2] Vukelja P L, Naumov R M, Vucinic M M et al. Experimental investigations of overvoltages in neutral isolated networks[J]. IEE Proceedings-Generation, Transmission and Distribution, 1993, 140 (5): 343-350.
• [3] Andrei R G, Halley B R. Voltage transformer ferroresonance from an energy transfer standpoint[J]. IEEE Transactions on Power Deliver, 1989, 4(3): 1773-1778.
• [4] Zhu Xukai, Yang Yihan, Lian Hongbo et al. Study on ferroresonance due to electromagnetic PT in ungrounded neutral system[C]. 2004 International Conference on Power System Technology, 2004, 1: 924-929.
• [5] Chakravarthy S K, Nayar C V. Series ferroresonance in power systems [J]. International Journal of Electrical Power and Energy System, 1995, 17(4): 1267-274.
• [6] Jacobson D A N. Examples of ferroresonance in a high voltage power system[C]. 2003 IEEE Power Engineering Society General Meeting, 2003, 2: 1206-1212.
• [7] Shott H S, Peterson H A. Criteria for neutral stability of wye- grounded-primary broken-delta-secondary transformer circuit [J]. Transaction on AIEE, 1941, 24(4): 997-1002.
• [8] Marti J R, Soudack A C. Ferroresonance in power systems: fundamental solutions[J]. IEE Proceedings-Generation, Transmission and Distribution, 1991, 138(4): 321-329.
• [9] Stucken C, Monfils P A, Janssen N et al. Risk of ferroresonance in isolated neutral networks and remedies[C]. Proceedings of the 14th International Conference and Exhibition on Electricity Distribution Electricity Distribution, Part 1 Contributions, 1997, 1: 18/1-18/6.
• [10] 金秋生．农村电力网产生铁磁谐振的机理及防范措施[J]．电网技 术,2001,25(6):61-63． Jin Qiusheng. Mechanism of ferro-magnetic resonance occurred in rural power system and its countermeasures[J]. Power System Technology, 2001, 25(6): 61-63.
• [11] 龙伟文,林永辉．防止中性点不接地系统铁磁谐振的措施[J]．广 东电力,2002,15(4):29-32． Long Weiwen, Lin Yonghui. Preventive measures of ferroresonance for isolated neutral system[J]. Guangdong Electric Power, 2002, 15(4): 29-32.
• [12] Horak J. A review of ferroresonance[C]. 57th Annual Conference for Protective Relay Engineers, 2004: 1-29.
• [13] Li Yunge, Shi Wei, Qin Rui et al. A systematical method for suppressing ferroresonance at neutral-grounded substations[J]. IEEE Transactions on Power Delivery, 2003, 18(3): 1009-1014.
• [14] 葛栋,鲁铁成,王平．配电网铁磁谐振消谐机理仿真计算研究[J]．高 电压技术,2003,29(11):15-17． Ge Dong, Lu Tiecheng, Wang Ping. Study on simulation calculation of ferroresonance elimination in power distribution system[J]. High Voltage Engineering, 2003, 29(11): 15-17.
• [15] 杜志叶,阮江军,王伟刚．铁磁谐振仿真模型的改进[J]．继电器, 2004,32(8):26-29,35． Du Zhiye, Ruan Jiangjun, Wang Weigang. Improvements on simulation model of ferroresonance[J], Relay, 2004, 32(8): 26-29, 35.
• [16] 石启新,谈顺涛.不接地系统中电磁式PT异常运行的数字仿真分 析[J]．电工技术杂志,2004,(6):67-70,85． Shi Qixin, Tan Shuntao. Digital simulation study and analysis on abnormity of electromagnetic potential transformer in isolated neutral system[J]. Electrical Technology Magazine, 2004, (6): 67-70, 85.
• [17] 翁利民,陈灵欣,靳剑峰．配电网电压互感器铁磁谐振的特点与 抑制[J]．继电器,2004,32(20):40-42． Weng Limin, Chen Lingxin, Jin Jianfeng. Characteristics and suppression of ferroresonance of electromagnetic PT in distribution [J]. Relay, 2004, 32(20): 40-42.
• [18] Shein D, Zissu S. Domains of ferroresonance occurrence in voltage transformers with or without damping reactors[C]. 18th Convention of Electrical and Electronics Engineers in Israel, 1995, 1.5.2/1-1.5.2/5.
• [19] 许志龙,黄建华,王大忠．10 kV电网TV铁磁谐振过电压数字仿 真及研究[J]．电力自动化设备,2001,21(2):27-29,38． Xu Zhilong, Huang Jianhua, Wang Dazhong.The dital simulation and study of TV ferroresonance over-voltage in 10 kV power network [J]. Electric Power Equipment, 2001, 21(2): 27-29, 38.
• [20] 南京创迪电气有限责任公司．LXQ系列压变中性点用消谐器说明 书[Z]．南京．
• [21] 黄金辉．“网TV”方式消除铁磁谐振的机理和异常分析[J]．华东 电力,2000,28(10):20-24．
• [22] 邓金启 智能消弧线圈接地装置及其应用[J]．电网技术,2001, 25(10):75-77． Deng Jinqi. Intelligent arc suppression coil grounding device and its application[J]. Power System Technology, 2001, 25(10): 75-77
• [23] 许颖．对消弧线圈“消除弧光接地过电压”的异议[J]．电网技术, 2002,26(10):75-77． Xu Ying. Dissidence to "the elimination of ground arcing faults caused overvoltage by Peterson's coils"[J] . Power System Technology, 2002, 26(10): 75-77.
• [24] 中国西电集团．电压互感器保护用高压限流熔断器(产品说明) [EB/OL]. http://www.xirong.com/produts/Infopro/lm2_8.html