磁控光阀型闭环无源电流互感器性能研究  

Study of the Performance of Magnetically Controlled Optical Valve Type Closed-loop Passive Current Transformer

作　　者：张鹏 严敏 曹鸿 赵俊[2] ZHANG Peng;YAN Min;CAO Hong;ZHAO Jun(Qujing Bureau of CSG EHV Power Transmission Company,Qujing 655000,China;不详)

机构地区：[1]中国南方电网有限责任公司超高压输电公司曲靖局,云南曲靖655000 [2]东南大学,光传感/通信综合网络国家地方联合工程研究中心,江苏南京210096

出　　处：《电力电子技术》2023年第8期29-31,共3页Power Electronics

基　　金：航空科学基金(2019ZH069003);中国南方电网公司科技项目(010800KK52220001)。

摘　　要：为实现电力系统电流信息的安全、精准、低成本测量,基于微光机电系统技术,提出一种磁控光阀型无源光学电流传感方案,其具有调制速率快、量产成本低等特点。并提出基于微功率光控信号源的闭环光反馈回路结构,以进一步提高系统的线性度和动态范围。且完成了样机研制,并依据GB/T 20840.8-2007规定的220 kV电子式电流互感器测试规范,对其准确度及线性度进行了测试。结果表明,该系统比差(RE)波动范围在60 A时为-0.3%~0.25%,在1440 A时为0.02%~0.05%,准确度满足计量0.2级的误差限值要求。In order to realize the safe,accurate and low-cost measurement of power system current information,based on the low-light electromechanical system technology,a magnetically controlled optical valve type passive optical current sensing scheme is proposed,which has the characteristics of fast modulation rate and low mass production cost.A closed-loop optical feedback circuit structure based on micro-power optical controlled signal source is proposed to further improve the linearity and dynamic range of the system.The prototype is developed,and its accuracy and linearity are tested according to the 220 kV electronic current transformer test specification specified in GB/T 20840.8-2007.The results show that the ratio error(RE)fluctuation range of the system is-0.3%~0.25%at 60 A and 0.02%~0.05%at 1440 A,and the accuracy meets the error limit of 0.2%metering class.

关 键 词：电流互感器 磁控光阀 光控信号源 闭环 

分 类 号：TM452[电气工程—电器]