Integrated Protection Method of Intelligent Anti Harmonic Voltage Transformer Based on Internet of Things

doi:10.16628/j.cnki.2095-8188.2020.09.015

Abstract

Abstract:

In order to solve the problems of primary winding burning,high voltage fuse fusing and too large third harmonic voltage containing rate of electromagnetic voltage transformer in the distribution network of non grounded neutral system,this paper analyzed the mechanism of electromagnetic voltage transformer frequent damage,compared the advantages and disadvantages of various methods of electromagnetic voltage transformer protection,put forward an intelligent anti harmonic electromagnetic voltage transformer comprehensive protection method based on the Internet of things,and designed the corresponding devices,developed the corresponding Internet of things app,and put it into the field application.This method can correctly and reliably protect electromagnetic voltage transformer when the system and transformer are abnormal.At the same time,when the system is in normal operation,the vacuum switch can inhibit the voltage deviation of the measurement opening of the system,not affect the measurement and protection of the system,and improve the power quality characteristics of the signal.The feasibility and correctness of the proposed method were verified by the monitoring data.

Key words: voltage transformer fault, harmonic, intelligent anti harmonic, Internet of things

CLC Number:

TM76

GUO Min, HE Guoxin, SHI Tongheng, LIANG Guangsheng, JIN Qingren, YAO Zhiyang, CHEN Weidong. Integrated Protection Method of Intelligent Anti Harmonic Voltage Transformer Based on Internet of Things[J]. LOW VOLTAGE APPARATUS, 2020, 594(9): 79-85.

Figures/Tables 12

References 23

[1]	刘志刚 . 电磁式电压互感器故障分析及综合防护[J]. 炼油与化工, 2018,29(2):58-60.
[2]	李杲喆, 薛玮, 周力行 . 配电网串联补偿线路铁磁谐振风险评估[J]. 电器与能效管理技术, 2019(2):32-37.
[3]	易成星, 杨伟, 朱文艳 . 电压互感器铁磁谐振过电压的研究[J]. 电工电气, 2013(9):20-23.
[4]	ZHOU L X, YIN Z D. Research on PT ferromagnetic resonance region and controllable damping[C]∥ 2007 IEEE Lausanne Power Tech, 2007: 413-418.
[5]	段宏坤 . 10 kV电压互感器高压保险熔断的原因分析及治理措施研究[D]. 保定:华北电力大学, 2013.
[6]	姜伟 . 配电网铁磁谐振分析与治理措施研究[D]. 济南:山东大学, 2014.
[7]	交流电气装置的过电压保护和绝缘配合:DL/T 620—1997[S].
[8]	交流电气装置的过电压保护和绝缘配合设计规范:GB/T 50064—2014[S].
[9]	杨文勇, 刘丽, 戴宇 , 等. 接地消弧装置导致PT铁磁谐振机理分析[J]. 电力大数据, 2019,22(8):88-92.
[10]	齐郑, 李鸿毅 . 孤岛模式下的微网多PT铁磁谐振的研究[J]. 电力系统保护与控制, 2019,47(22):52-58.
[11]	孟宪影, 狄藤藤, 杜飞 . 基于综合判别方法的单相接地/PT断线故障自动判别及报警装置研发[J]. 装备制造技术, 2018(12):215-217,224.
[12]	申文伟, 何峰, 鲍新 , 等. 中性点非有效接地系统电压互感器故障分析与治理措施研究[J]. 高压电器, 2018,54(7):200-205.
[13]	朱望强 . 医院供电系统铁磁谐振发生与防治和高可靠性供电方法研究[D]. 重庆:重庆大学, 2018.
[14]	李蕾 . 10 kV配电网中铁磁谐振过电压及抑制措施的研究[D]. 济南:山东大学, 2018.
[15]	粱晓红, 刘永青, 严福超 , 等. 10 kV系统单相接地引起PT烧毁原因分析及处理[J]. 电工技术, 2017(12):76-77,82.
[16]	赵淑敏, 凌光 . 小接地系统4PT方式的二次电压分析与建模[J]. 电气自动化, 2017,39(1):78-81.
[17]	ZHANG Z Y, LU F C, LIANG G S . A high-frequency circuit model of a potential transformer for the very fast transient simulation in GIS[J]. IEEE Transactions on Power Delivery, 2008,23(4):1995-1999. doi: 10.1109/TPWRD.2008.2002961
[18]	刘衍, 龙国华, 周求宽 , 等. 开关型消弧激发PT过流的试验与仿真研究[J]. 高压电器, 2017,53(2):87-94.
[19]	陈培国, 管瑞良, 陈平 . 新一代智能化断路器与物联网技术的融合[J]. 电器与能效管理技术, 2018(21):10-12,76.
[20]	卜宪庚, 梁建权, 卢雷 , 等. 基于物联网的电能质量监测系统的设计[J]. 电器与能效管理技术, 2015(7):44-48.
[21]	宋艳, 王笑棠, 卢武 , 等. 基于物联网技术的智能终端设备感知技术现状分析[J]. 电器与能效管理技术, 2018(21):53-59.
[22]	李琳, 王逸兮, 梁懿 , 等. 电力物联网在线监测设备系统研究[J]. 微型电脑应用, 2019,35(12):100-102.
[23]	吕志宁, 胡子珩, 宁柏锋 , 等. 针对电力系统的物联网需求攻击研究进展与发展趋势[J]. 南方电网技术, 2020,14(1):24-30.

LED	功能	使用说明
1	设备运行	正常运行闪烁
2	WiFi通信	数据传输时,指示灯闪烁
3	RS-485通信	数据传输时,指示灯闪烁
4	远程通信	指示远程通信连接状态
5	铁磁谐振报警	电压互感器告警指示灯显示,常亮时有相应故障发生,故障消除后指示灯复位
6	单相接地报警
7	断线故障报警
8	系统谐振报警