电压互感器低压回路接地电流实时预警系统  

Real⁃time early warning system for grounding current in low⁃voltage circuit of voltage transformer

作　　者：孟星 夏海飞 陈生学 MENG Xing;XIA Haifei;CHEN Shengxue(College of Physics and Information Engineering,Zhaotong University,Zhaotong 657000,China;Zhaotong Power Grid Co.,Ltd.,Zhaotong 657000,China)

机构地区：[1]昭通学院物理与信息工程学院,云南昭通657000 [2]昭通供电局,云南昭通657000

出　　处：《电子设计工程》2023年第19期104-107,112,共5页Electronic Design Engineering

摘　　要：针对变电站电压互感器二次回路会发生多点接地的问题,提出并研制了一种电压互感器低压回路接地电流实时预警系统。该系统由Arduino主控板、电流检测模块、显示模块、报警模块、阈值设定模块和电源模块组成。当Arduino主控板读取到电流检测模块检测到的电流值高于设定的电流阈值时,即向在场工作人员和后台监控人员发出预警信息,同时增加电流阈值调整按钮,使设备参数可整定,针对小感应面积变电站变更设备参数后亦可准确测量其接地电流。Aiming at the problem of multi-point grounding in the secondary circuit of voltage transformer in substation,a real-time early warning system of grounding current in low-voltage circuit of voltage transformer is proposed and developed.The system consists of Arduino main control board,current detection module,display module,alarm module,threshold setting module and power supply module.When the Arduino main control board reads that the current value detected by the current detection module is higher than the set current threshold,it sends an early warning message to the on-site staff and the background monitoring personnel,at the same time,it adds a current threshold adjustment button,so that the equipment parameters can be adjusted,and the grounding current of the substation with small induction area can be accurately measured after changing the equipment parameters.

关 键 词：实时预警 多点接地 电流检测 阈值设定 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]