The Analysis And Application Of The Gas Chromatography For The Power Transformer Of Hengshui Grid

The scale of the power system of China is becoming larger and larger with the rapid development of the society,which require higher reliability of the power system.The transformer,the connection device of the girds with different rated voltage,plays an important role in the whole power system.The security of the transformer will guarantee of the security of the power system.Hence,the function of the diagnose technology of the transformer is receiving more and more attention.The abnormal operation and fault of the transformer can be found in time with the gas chromatography.Thus the level of the security and stability of the transformer are improved.This paper studied the gas chromatography of the Hengshui grid.The main contents of this paper is as below:(1)The whole status of the Hengshui grid is introduced,inlcuding the load,the types and the durable years of the transformer.The basic pricinple of the gas chromatography of power transformer is given.The instructions of the detection device is introduced.(2)The detection of the power transformer with different detection methods is studied.The collection method,preservation method of the oil sample of the power transformer are introduced.The ectraction method of the oil gas is given.The mathematical equations are deduced.The detection of the power transformer of Hengshui grid with different detection methods is performed.The comparison of the detection results with different methods is performed.(3)The gas chromatography of power transformer under fault condition is studied.The steps and threshold of different parameters are given.The value range and judge process of the transformer under different faults are introduced.The oil chromatography analysis is applied to the fault detection of the transformer.Different judgement methods are applied to each case,whose results verify tht rightness of the method.