Operating Transformer Common Fault Diagnosis Experiment

As one of the most important power system master device,it is essential for safe and stable operation of the transformer, its reliability not only affect the device itself, but also the entire power system.So,Accurately grasp the transformer operation status, to detect equipment failure problems in time, quickly and accurately diagnose the fault type of transformer operation, treatment measures taken for repair, these have important significance to improving the safety and operation of the transformer power system reliability, economy.This paper, uses a common fault in transformer as a starting point, elaborates project, methods, standards and considerations of transformer fault diagnosis trials on site currently. The paper analyzes the structural characteristics of the main transformer in the system and the common faults and failure mechanisms, Evolution processes and manifestations on the operation of the transformer. Then for the variety of current common fault, the paper sets out its program of related diagnostic tests for future similar failure to provide timely and accurate diagnosis as a guiding reference. Finally, the paper takes the 2nd 220 kV main transformer in Baimiao and the 3rd 35 kV MAIN TRANSFORMER in Xing Chen for example, from the terms of basic status of the device, the failure process, the diagnostic process of the test, as well as check processing, failure analysis and treatment measures and recommendations,it gives a detailed and comprehensive exposition of the entire transformer fault diagnosis and analysis process, not only pointing out the direction to accurately grasp the origin of the fault, find the point of failure, but also providing valuable references experience for rapid and accurate diagnosis of transformer fault and the timely processing of hidden faults in the future.Transformer Fault Diagnosis should be based on the principle as early as possible and as quickly as possible, accurately grasp the power outage in diagnosis and treatment methods,and take advantage of the on-line monitoring and charged detect technical in the current device state maintenance. Timely detection of defects, grasping the device status, provide effective protection for making more scientific Maintenance Decision, reasonable arrangements for maintenance projects, time and for reducing maintenance cost.