地网分流的源表同步相量测试方法  

Phase Measurement of the Current Division Factor of Grounding Grids by Synchronous Source-Meter Configuration

作　　者：任章鳌 何智强 胡晓晖 高磊[4] 张宣 潘卓洪 REN Zhang'ao;HE Zhiqiang;HU Xiaohui;GAO Lei;ZHANG Xuan;PAN Zhuohong(Electric Power Research Institute,State Grid Hunan Electric Power Co.,Ltd.,Changsha 410000,China;State Grid Hunan Electric Power Co.,Ltd.,Changsha 410007;Wuhan Kangda Electric Co.,Ltd.,Wuhan 430070,China;North China Electric Power University,Hebei Province Key Laboratory for Safety Defense of Power Transmission and Transformation Equipment,Baoding 071003,China)

机构地区：[1]国网湖南省电力有限公司电力科学研究院,长沙410000 [2]国网湖南省电力有限公司,长沙410007 [3]武汉市康达电气有限公司,武汉430070 [4]华北电力大学河北省输变电设备安全防御重点实验室,河北保定071003

出　　处：《电瓷避雷器》2023年第2期127-133,共7页Insulators and Surge Arresters

基　　金：国家自然科学基金资助项目(编号:51607129)。

摘　　要：针对目前地网分流测试中同步和无线数据传输受现场因素影响的问题,提出了一种源表同步相量测试方法。该法适用于主从/非主从工作模式,测量各个分流相量的采样触发和总测试电流的控制触发均采用GPS秒脉冲沿进行同步。一方面,程控电源实现了测试电流信号的过零点同步。另一方面,分流相量可按秒脉冲沿基准计算时间差,进而得出相位。方案从原理上实现了测试电源与测试仪表间的同步,且测量时源表间无需进行通讯,可大幅减少测试时间和工作量,从而有效提高现场的测试效率和降低测试成本。采用多通道测量、数据同步采集处理技术,最后以某大型水电站为例介绍了方法的硬件系统与现场应用。地网分流的源表同步相量测试方法可作为物联网技术的先进应用案例,为现有的接地测量手段提供改进的技术支持。A source-meter synchronization phase measurement method is proposed for the current divi-sion factor that synchronization and wireless data transmission are affected by field factors.The method can be used in master-slave/non-master-slave mode,with the source GPS module providing the pulse edge for the synchronization signal for the sampling trigger of each dividing current point and the control trigger of the total test current.The source GPS provides the pulse edge to synchronize the over-zero point of the test current signal through a programmable power supply.The pulse edge provided by the meter GPS module of the dividing current point calculates the time dfference,which in turn yields the phase difference relative to the constant current source test signal.This solution achieves source-me-ter synchronization and eliminates the need for data transfer between source meters,significantly reducing test time and improving test efficiency.Multi-channel measurement and data synchronization acquisition and processing techniques are used,and finally,the hardware system and field application of this method are introduced with a large hydropower station as an example.This method can be used as an advanced application case of IOT technology to provide improved technical support for existing grounding measure-ment means.

关 键 词：GPS授时 程控电源 地网分流 源表同步 接地测量 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM933.313