Transformer failure gas monitoring system and method

Abstract

The invention relates to transformer failure gas monitoring system and method. The transformer failure gas monitoring system adopts an oil-gas separating device (100) and comprises an optical fiber gas sensor (200) of a distributed feedback type laser (206), wherein the oil-gas separating device (100) separates a failure gas in a transformer to a gas chamber (104); the output light of the distributed feedback type laser (206) in the optical fiber gas sensor (200) is transmitted to an optical fiber gas sensing head (201) of the gas chamber (104) and transmitted to an optical detector (202) to carry out photoelectric conversion; and then the output light is transmitted to a bandpass filter (203) to be filtered and amplified and input into a FPGA (204) and an industrial personal computer (208) to carry out analysis so as to perform judgment on the condition of the transformer. The system and the method enable a plurality of different gas sensing heads to share a same set of light source and detecting system and realize the simultaneous measurement of low cost, multipoint and a plurality of gases. 本发明涉及变压器故障气体监测系统及方法，采用油气分离装置(100)和包括分布反馈式激光器(206)的光纤气体传感器(200)。油气分离装置(100)将变压器中的故障气体分离到气室(104)；光纤气体传感器(200)中的分布反馈式激光器(206)的输出光传至气室(104)中的光纤气体传感头(201)，再送至光探测器(202)作光电转换，然后再送到带通滤波器(203)进行滤波及放大，再输入到FPGA(204)和工控机(208)进行分析进而对变压器状况做出判断。本发明的系统及方法可以使多个不同的气体传感头共用同一套光源和检测系统，实现低成本、多点、多种气体的同时测量。