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Analysis and treatment of abnormal grounding current of transformer core |
Jin Pengchao, Wang Li'nan |
China Datang Group Science and Technology Research Institute Co., Ltd, Huazhong Electric Power Research Institute, Zhengzhou 450000 |
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Abstract In this paper, the external causes, internal causes and special causes of the abnormality of the grounding current of the power transformer core are analyzed. The grounding current test, chromatographic analysis and insulation resistance are used to analyze and discriminate the abnormal causes for three types of reasons. The current limiting resistor is used. The capacitor current, the electric welder, and the hood inspection method process the abnormal current. The fault is located by the insulation damage of the down conductor, the metal foreign object overlap, the capacitance impact method, and the actual case analysis of the fault current is limited by the current limiting resistor method. Ensure the normal operation of the transformer. Suggestions are put forward, which have important reference significance for the operation and maintenance of transformer core grounding current.
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Received: 29 August 2019
Published: 20 March 2020
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Cite this article: |
Jin Pengchao,Wang Li'nan. Analysis and treatment of abnormal grounding current of transformer core[J]. Electrical Engineering, 2020, 21(3): 137-140.
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URL: |
http://dqjs.cesmedia.cn/EN/Y2020/V21/I3/137
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[1] DL/T 596—1996. 电力设备预防性试验规程[S]. [2] GB/T 24846—2018. 1000kV交流电气设备预防性试验规程[S]. [3] 韩金华, 张健壮. 大型电力变压器典型故障案例分析与处理[M]. 北京: 中国电力出版社, 2012. [4] 陈化钢. 电力设备预防性试验方法及诊断技术[M]. 北京: 中国科学技术出版社, 2001. [5] 胡启凡. 变压器试验技术[M]. 北京: 中国电力出版社, 2010. [6] 赵静月. 变压器制造工艺[M]. 北京: 中国电力出版社, 2009. [7] 王立楠. 一起美式箱变接地故障分析[J]. 变压器, 2018, 55(6): 75-69. [8] 符雪鹏, 苑东升. 一种三相三柱式变压器铁心夹件的改进结构[J]. 电气技术, 2017, 18(10): 85-87. [9] 朱春阳, 戚岭娜, 童鑫. 配电变压器绝缘状态检测技术综述[J]. 电气技术, 2019, 20(3): 1-5, 12. [10] 张兴飞. 一起500kV变压器夹件对地绝缘为零缺陷的分析和处理[J]. 电气技术, 2017, 18(11): 142-144. |
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