双晶体温度补偿型非接触式光学过电压传感器  

Contactless Optical Overvoltage Sensor Based on Dual-crystal Compensation

作　　者：司马文霞[1] 韩睿[1] 杨庆[1] 孙尚鹏[1] 刘通[1] 刘红文 SIMA Wenxia;HAN Rui;YANG Qing;SUN Shangpeng;LIU Tong;LIU Hongwen(State Key Laboratory of Power Transmission Equipment ＆ System Security and New Technology,Chongqing University,Chong-qing 400030,China;Electric Power Research Institute,Yunnan Electric Power Grid Co.,Ltd.,Kunming 650217,China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]云南电网有限责任公司电力科学研究院,昆明650217

出　　处：《高电压技术》2018年第11期3465-3473,共9页High Voltage Engineering

基　　金：国家自然科学基金(51277190;51477018);国家创新群体研究基金(51321063)~~

摘　　要：现今电网电压监测和过电压监测大多采用传统的接触式分压系统,该方式的运行可靠性较高,但具有测量频带窄、抗电磁干扰能力弱、安装和维护不方便等不足之处。因而基于一次电光效应和空气耦合杂散电容原理,设计了双铌酸锂晶体结构的光学电压传感器,响应频带可覆盖10Hz～5MHz,电压比例系数波动小于2%。在实验室搭建试验平台测量了传感器的输入输出特性与温度稳定性,试验结果表明：传感器在[–10？C, 60？C]范围内的输出电压相对误差小于±5%。同时,设计三相解耦算法,实现了传感器在500 kV线路的人工接地短路过电压测量中的应用。Nowadays, the voltage and overvoltage in power system are mostly monitored by traditional contact voltage divider system, which has high operating reliability, but the monitoring method also has some disadvantages such as narrow measuring band, weak ability to resist electromagnetic interference, inconvenient installation and maintenance, and so on. Therefore, based on the electro-optic effect and the principle of air coupled stray capacitance, a dual LiNbO3 crystal-based contactless optical overvoltage sensor was designed. The sensor＇s response band can cover 10 Hz～5 MHz, and the voltage proportional coefficient fluctuates less than 2%. The input and output characteristics and temperature stability of the sensor were measured in the laboratory. The test results show that the relative error of the output voltage of the sensor in the range of [–10 ？C, 60 ？C] is less than ±5%. Furthermore, a three-phase decoupling algorithm is designed to achieve the application of the sensor in the short circuit voltage measurement of the 500 kV line artificial grounding test.

关 键 词：非接触式 电压测量 过电压 双晶体结构 电光效应 传感器 

分 类 号：TM933.2[电气工程—电力电子与电力传动]