Transformer Fault Detection Which Based On The Transformer Oil Online Monitoring

Paper through the implementation of the transformer oil chromatography and the significance of fault diagnosis of transformer faults diagnosis of the status quo and development trend are analyzed. In view of the oil chromatographic detection principle and fault diagnosis methods are analyzed. Combined with the influencing factors of conventional oil chromatographic analysis and error sources, successful implementation using the membrane permeability gas as the main characteristics of the seven kinds of dissolved gas in transformer oil online monitoring In the transformer substation main transformer. Through the analysis of a large number of operational data, the system runs stably, can correctly reflect the actual operation situation of the Transformer, and have high credibility.Can be used as the basis for the state overhaulThis paper introduces the application of charged detection and online monitoring technology which several widely developed rapidly in recent years. Through the actual case lists the advantages of various kinds of testing technology. Through the analysis of various charged detection and online monitoring technology in the application of transformer fault diagnosis to find out in favor of the plan of the transformer fault diagnosis.On the basis of investigation and research, Sums up the detailed analysis transformer Repair welding, Transformer oil compensating, Tap-changer institutions within the oil to the transformer oil leakage of ontology,and Over load, moisture content, the new operation of transformer and other field interference factors on the implementation of on-line monitoring and fault diagnosis of transformer oil chromatography. Come to the conclusion that the part of engineering application value. And for comprehensive, integrated, accurate diagnosis of transformer internal fault has very realistic guiding significance.The analysis of conventional oil chromatographic analysis were discussed, due to the different sampling points to the influence of transformer oil chromatographic analysis. Especially when transformer oil chromatographic analysis in determining online and choose the sampling position,must to consider the transformer oil circulation way, the structure of the transformer, the oil flow distribution, fault fault severity and so on.In this paper, analyze the threshold value, the fuzzy theory, artificial neural network and expert system diagnostic methods in one by one. Summarize the advantages and disadvantages. Finally decided to apply the fuzzy theory combined with the optimization of three ratio method of fault diagnosis system. Against the current of power transformer fault diagnosis methods adopt online or offline diagnosis, consider compared with offline detection online monitoring equipment has the characteristic of high accuracy and high sensitivity. At the same time, Oil chromatogram online monitoring can avoid man-made factors affect test results, can be real reaction of transformer oil dissolved gas in the actual values.In this paper, the TROM - 600 type oil chromatogram online monitor device in weifang power supply company, the application of the Wangjia no.2 transformer has carried on the detailed study, proposed installation and commissioning of the Wangjia no.2 transformer online monitor system, and in the actual running forward some measures to improve the monitoring precision and accuracy. At present the system has used successfully in the Wangjia no.2 transformer.