Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 最新索引

低压电缆桥架振动与接地线电流异常原因分析

来源:电工电气发布时间:2020-11-19 14:19 浏览次数:691
低压电缆桥架振动与接地线电流异常原因分析
 
王亚青1,张国兴2,刘惠姣3
(1 保定电力职业技术学院,河北 保定 071051;2 中冀电力集团股份有限公司,河北 保定 071051;3 鼎阳智电慧服科技股份有限公司,河北 保定 071051)
 
    摘 要:某电力施工工程,调试运行大负荷用电设备时出现线路压降偏大、三相电流运行不平衡、设备接地线路接地电流异常现象,且电缆桥架有剧烈振动并伴随较大的工频噪声,通过对线路阻抗电压、二次电流产生的原因、运行电缆相互作用力等方面的理论计算和原理分析,结合实际测量并进行问题排查,论证了造成以上现象的主要因素。经过现场问题的排查和总结,纠正了施工过程中工艺的错误,并给出了正确的施工工艺,消除了运行隐患。
    关键词:接地电流;电磁感应;磁动势;相互作用力;交变磁场
    中图分类号:TM726.4     文献标识码:B     文章编号:1007-3175(2020)11-0044-05
 
Analysis on the Cause of the Vibration and the Abnormal Current of Grounding System of Low Voltage Cable Bridge
 
WANG Ya-qing1, ZHANG Guo-xing2, LIU Hui-jiao3
(1 Baoding Electric Power VOC.&TECH. College, Baoding 071051, China;
2 Zhongji Power Group Co., Ltd, Baoding 071051, China;
3 Dinyoung Intelligent Electric Power Service Technology Co., Ltd, Baoding 071051, China)
 
    Abstract: In an electric power construction project, when debugging and operating heavy load electric equipment, there are large line voltage drop, unbalanced operation of three-phase current, abnormal grounding current of equipment grounding line, and violent vibration of cable bridge accompanied by large power frequency noise.Through theoretical calculation and principle analysis on the causes of line impedance voltage, secondary current, interaction force of operating cable, combined with the actual measurement and troubleshooting, the main factors causing the above phenomenon are demonstrated.Through the investigation and summary of the field problems, the errors in the process of construction are corrected, and the correct construction process is given, which eliminates the operation hidden dangers, promotes the progress of the construction technology of the construction party to a certain extent, and better guarantees the safe operation of the equipment.
    Key words: grounding current; electromagnetic induction; magnetomotive force; interaction force; alternating magnetic field
 
参考文献
[1] 刘刚,熊小伏,廖瑞金,等. 基于不同检测方法的高压电流互感器误差比较与分析[J]. 电力自动化设备,2019,39(3):103-107.
[2] 中国电力企业联合会.1 100 kV高压交流断路器:GB/T 24838—2018[S]. 北京: 中国标准出版社,2018:17.
[3] 张伟刚,张保会,胡海松,等. 应用小波包分析实现配电网单相接地故障选线[J]. 电力系统自动化,2009,33(23):60-64.
[4] 安滨.1 000 kV GIS设备故障检测及实例分析[J].电工电气,2019(8):46-49.
[5] 曲轶龙,谭伟璞,杨以涵. 基于形态滤波的谐振接地系统故障选线新方法[J]. 电力系统自动化,2008,32(12):73-77.
[6] 张钧,何正友,贾勇. 基于S变换的故障选线新方法[J]. 中国电机工程学报,2011,31(10):109-115.
[7] 胡全义,秘立鹏,刘天奇,等. 一起GIS设备漏气及现场交流耐压试验击穿故障分析[J]. 电工电气,2017(8):112-116.
[8] 魏向向,温渤婴. 基于2阶累加生成相关性的谐振接地系统故障选线方法[J]. 电网技术,2017,41(5):1674-1682.