光栅光阀型闭环直流电流互感器及温度修正方法研究
Study on Grating Light Valve Type Closed-Loop DC Current Transformer and Temperature Correction Method
甘战 1谭劲 1王典浪 1张瑞 1罗曦 1温易宸 2赵俊2
作者信息
- 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
- 折叠
摘要
为满足直流电力系统电能计量、电量监测、控制与保护需求,提出一种基于微功率光控信号源的闭环光反馈光栅光阀(GLV)型直流电流传感方案,集成一种基于保偏光纤温度双折射效应的全光纤温度传感器,实现GLV探头的实时温度监测,进而实现系统温度误差修正.完成了样机研制及测试(额定电流In=500 A),结果显示,在10%In～110%In范围内,系统比差(RE)波动小于±0.2%;0～1200 Hz范围内,谐波测量误差小于-0.693%;-40℃～85℃范围内,误差修正后的RE波动范围为-0.186%～0.084%;阶跃响应上升时间小于125 μs.测试结果表明,系统满足GB/T 26216.1-2019规定的0.2级的误差限值要求.
Abstract
In order to meet the needs of DC power system energy measurement,power monitoring,control and protection,a closed-loop optical feedback grating light valve(GLV)type DC current sensing scheme based on micropower optical control signal source is pro-posed.A polarization maintaining fiber based all-fiber temperature sensor is integrated to realize the real-time temperature monitoring of GLV probe,and then the system temperature error correction is realized.The prototype development and test(rated current In=500 A)is completed,and the results show that in the range of 10%In-110%In,the fluctuation of system specific difference(RE)is less than±0.2%.In the range of 0-1200 Hz,the harmonic measurement error is less than-0.693%.In the range of-40℃-85℃,the error corrected RE fluctuation range is-0.186%-0.084%.The step response rise time is less than 125 μs.The results show that the system meets the error limit of class 0.2 specified in GB/T 26216.1-2019.
关键词
直流/电流互感器/光栅光阀/闭环/温度Key words
DC/current transformer/grating light valve/closed loop/temperature引用本文复制引用
基金项目
中国南方电网公司科技项目(010800KK52220001)
航空科学基金项目(2019ZH069003)
出版年
2024
国家科技期刊平台
NSTL
万方数据