变压器绝缘故障(国外英文资料).doc

变压器绝缘故障(国外英文资料) Return list of transformer insulation faults Power transformer is the most widely adopted oil immersed transformer and the dry resin two kinds of transformer, power transformer insulation insulation system is composed of transformer insulation material, it is the basic condition for normal operation of the transformer and the operation, the service life of the transformer is composed of insulating materials (i.e. oil or resin) determined by the life. Practice has proved that most of the transformer damage and failure are caused by damage to the insulation system. According to statistics, due to various types of insulation failures, accidents accounted for more than 85% of all transformer accidents. The transformer has a long service life for normal operation and attention to the maintenance and management of transformers. According to the theoretical calculation and experimental research, the theoretical life of the oil immersed distribution transformer will reach 400 years when the actual temperature of the oil immersed distribution transformer lasts 95 degrees. Design and operation experience, good maintenance of the transformer, the actual service life can reach 50 to 70 years, and according to the design requirements and technical indicators of manufacturing factory, the life expectancy of the transformer is 20 to 40 years. Therefore, the protection of the normal operation of the transformer and strengthen the reasonable maintenance of the insulation system, largely to ensure that the transformer has a relatively long service life, and preventive and predictive maintenance is to improve the service life of the transformer and the key to improve the reliability of power supply. Oil immersed transformer, the main insulation material is aging of insulating oil and solid insulation paper, cardboard and wood and other so-called C transformer insulation, the material is affected by environmental factors decomposition, reduce or loss of insulation stren