变电站空间电磁场对电力物联网汇聚节点线缆耦合特性分析  

Analysis of the Coupling Characteristics of the Spatial Electromagnetic Field of the Substation on the Cable of the Power IOT Sink Node

作　　者：李谦[1,2] 张卫东 杨志超[3] 赵明敏[3] 王沛[1] 付胜军 关程远 LI Qian;ZHANG Weidong;YANG Zhichao;ZHAO Mingmin;WANG Pei;FU Shengjun;GUAN Chengyuan(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;Jiaxing Power Supply Company of State Grid Zhejiang Electric Power Co.,Ltd.,Jiaxing,Zhejiang 314033,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学电气与电子工程学院),北京102206 [2]国网浙江省电力有限公司嘉兴供电公司,浙江嘉兴314033 [3]中国电力科学研究院,北京100192

出　　处：《南方电网技术》2022年第7期92-100,共9页Southern Power System Technology

基　　金：国家电网有限公司科技项目“复杂电磁环境下变电站无线网络可靠性技术研究”(5500-202055070A-0-0-00)。

摘　　要：GIS变电站复杂的空间电磁骚扰会耦合侵入智慧型变电站无线传感网络的汇聚节点设备,导致其丢包、误码,工作异常,严重时会导致设备永久性损坏,造成整个无线网络系统的崩溃。调研了几座不同组网类型的智慧型变电站,实测了某110 kV智慧型变电站稳态情况下汇聚节点设备通信线和电源线的感应电流;分析了空间电磁场与汇聚节点线缆之间的耦合机理;建立了汇聚节点通信线和电源线的近场与远场情况下场线耦合的模型,并进行了芯线感应电压的计算;提出了用内部电路器件的噪声容限来判断芯线感应电压对汇聚节点的干扰程度。本文对汇聚节点在复杂电磁环境下的可靠性问题提出分析和建议,为推进电力物联网的大面积建设提供技术保障。The complex spatial electromagnetic disturbance of GIS substation will be coupled and invades the sink node equipment of the wireless sensor network of intelligent substation, resulting in packet loss, bit error and abnormal operation. In serious cases, it will cause permanent damage to the equipment and the collapse of the entire wireless network system. Several smart substations with different networking types are investigated in this paper, and the induced currents of communication lines and power lines of sink node equipment in a 110 kV smart substation are measured under steady-state conditions;The coupling mechanism between space electromagnetic field and sink cables is analyzed;The near-field and far-field coupling model of the communication line and power line of the sink node is established, and the induced voltage of the core wire is calculated;The noise tolerance of the internal circuit devices is proposed to judge the interference degree of the core induced voltage to the sink node. In this paper, the reliability of the sink node in the complex electromagnetic environment is analyzed and suggestions are put forward to provide technical support for promoting the large-scale construction of the power Internet of Things.

关 键 词：电力物联网 智慧型变电站 空间电磁场 电磁干扰 电磁兼容 汇聚节点 

分 类 号：TM63[电气工程—电力系统及自动化]