基于光声光谱法的变压器在线监测技术研究

Online monitoring technology of transformer based on photoacoustic spectroscopy

针对现有电力变压器油中的溶解气体浓度低和复杂的外部干扰信号等问题,监测系统在小信号测量和提取方面存在很大的困难。文中基于光声光谱法原理,提出一种对变压器油中气体进行在线监测的技术方案。通过实验,分析和比较了不同电压、不同时间的变压器油中溶解气体数据,确定故障类型。实验结果表明,光声光谱法可以快速检测出变压器油中溶解的故障气体。该研究为我国电力变压器在线监测技术的发展提供参考和借鉴。

Aiming at the problems of low dissolved gas concentration and complex external interference signals in the existing power transformer oil,the monitoring system has great difficulties in small signal measurement and extraction.Based on the principle of photoacoustic spectroscopy,this paper proposes a technical scheme for online monitoring of gas in transformer oil.The data of dissolved gas in transformer oil at different voltages and at different times were analyzed and compared through experiments,and the type of failure was determined.Experimental results show that the photoacoustic spectroscopy can quickly detect the faulty gas dissolved in transformer oil.The research provides reference for the development of online monitoring technology of power transformers in China.