电工技术学报  2016, Vol. 31 Issue (1): 85-90    DOI:
电磁兼容 |
500 kV GIS变电站VFTO对于电子式互感器的电磁骚扰研究
冯利民1,王晓波1,吴联梓1,王佳颖2,刘赫2
1.国网吉林省电力有限公司 长春 130021
2.国网吉林省电力有限公司电力科学研究院 长春 130021
Study on the Impact of VFTO Electromagnetic Interference on Electronic Transformers in 500 kV GIS Substation
Feng Limin1,Wang Xiaobo1,Wu Lianzi1,Wang Jiaying2,Liu He2
1.State Grid Jilin Electric Power Corporation Ltd. Changchun 130021 China
2.State Grid Jilin Electric Power Corporation Ltd.Electric Power Research Institute Changchun 130021 China
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摘要 随着气体绝缘全封闭组合电器(GIS)的广泛使用,由隔离开关和断路器操作引起的快速暂态过电压(VFTO)带来的危害越加明显。以某典型500 kV GIS智能变电站为计算原型,研究500 kV GIS变电站VFTO对电子式互感器的电磁骚扰。以噪声源和传播路径为基础,通过建立噪声耦合近似模型,实现对电子式互感器干扰信息的定性分析研究。通过分析发现,互感器耦合路径上的耦合电容CL和CN越小,VFTO噪声耦合效率越低,VFTO对电子式互感器的噪声影响也越小。研究结果表明,低频段通过修正CL和CN实现对电磁干扰的抑制,高频段采用滤波和屏蔽最为有效。通过现场实测证实,未安装防护装置情况下,测得数字采集卡输入端耦合VFTO最高幅值达到9.9 kV,采用电磁兼容综合防护措施后,VFTO最高幅值为0.61 V。
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冯利民
王晓波
吴联梓
王佳颖
刘赫
关键词 VFTO电子式互感器噪声耦合模型干扰抑制    
Abstract:With the widespread use of the gas insulated switchgear (GIS),the harm of very fast transient overvoltage (VFTO) caused by the disconnecting switch (DS) and the circuit breaker (CB) operation becomes increasingly obvious.One 500 kV GIS smart substation is used as a prototype to study the impact of VFTO electromagnetic interference on electronic transformers in 500 kV GIS substation.Base on the noise source and the transmission pathway,a noise coupling model has been set up in order to analyze the VFTO electromagnetic interference on electronic transformers qualitatively.It has been found that the decrease of the coupling capacity of transformer,i.e. CL,and CN,will contribute to the low noise coupling effect of VFTO.The conclusion shows that the most effective method for interference reduction is to revise CL,CN in the low frequency and add low band filter and shielding box in the high frequency.It has been proved by experimental data that the VFTO maximum amplitude is reduced from 9.9 kV to 0.61 V by using this method.
Key wordsVery fast transient overvoltage    electronic transformer    noise coupling model    interference reduction   
收稿日期: 2015-06-25      出版日期: 2016-01-21
PACS: TM315  
通讯作者: 王佳颖 女,1981年生,博士,高级工程师,研究方向为智能一次设备、光学测量在电力系统中的应用。E-mail:imwangjiaying@foxmail.com     E-mail: fenglimin@zju.edu.cn
作者简介: 冯利民 男,1976年生,博士,正高级工程师,研究方向为智能电网及电磁兼容。E-mail:fenglimin@zju.edu.cn
引用本文:   
冯利民,王晓波,吴联梓,王佳颖,刘赫. 500 kV GIS变电站VFTO对于电子式互感器的电磁骚扰研究[J]. 电工技术学报, 2016, 31(1): 85-90. Feng Limin,Wang Xiaobo,Wu Lianzi,Wang Jiaying,Liu He. Study on the Impact of VFTO Electromagnetic Interference on Electronic Transformers in 500 kV GIS Substation. Transactions of China Electrotechnical Society, 2016, 31(1): 85-90.
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