220kV电缆分布式光纤测温系统运行情况分析

Operation Condition Analysis of Distributed Optical Fiber Thermometric System for 220kV Cable

文章以北京地区220kV八长、长莲电缆分布式光纤测温系统为例,介绍了电缆分布式光纤测温系统的基本情况;介绍了对测温系统温度精度、温度变化灵敏度、温度异常报警响应速度进行校核试验的方法,并对校核结果进行了分析;将测温系统测量的温度曲线与隧道内的实际情况进行了比对,发现了很多有规律的现象;同时对系统运行需要关注的几个问题进行了阐述。经过综合分析,得出了220kV八长、长莲电缆分布式光纤测温系统温度精度均小于1℃,能准确发现限制电缆载流量的瓶颈点的温度和位置信息,实现提高电缆运营能力功能,能实现电力隧道温度异常报警功能,是一套有重要实用价值的高压电缆运行状态监测系统。

Taking the distributed optical fiber thermometric system of 220 kV Bachang and Changlian cable in Beijing area as an example, the basic conditions of distributed optical fiber thermometric system were introduced, including thermometric precision, sensitivity of temperature changing, response speed of warning for unusual temperature, the method of checking and testing, and analysis of checking results. Comparing the temperature curve measured by the thermometric system with actual condition in tunnel, the phenomena discovered regularly, at the same time, some problems that need to be paid attention to in system operation were elaborated. Through the integration analysis, the conclusion is that the temperature precision of distributed optical fiber thermometric system of 220 kV Bachang and Changlian cable is smaller than 1 ℃, which can be accurately discover the location information of the bottleneck point that restricts the cable current-carrying capacity to realize the improvement of cable operation ability, and can realize the function of warning for unusual temperature in tunnel, and is a set of HV cable operation condition monitoring system with important practical value.