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随着国民经济的快速发展和人们生活水平的日益提高，社会对电能这种特殊商品的依赖越来越多，同时对供电可靠性、电能质量的要求也越来越高。近年来，作为国民经济基础产业的电力得到了快速发展，配电网的建设和改造得到了重视，不断地提高配电网设备的技术性能、质量就显得特
With the rapid development of the national economy and the ever-increasing standard of living of people, the society relies more and more on such special commodities as electrical energy. At the same time, the requirements for power supply reliability and power quality are also getting higher and higher. In recent years, as the basic industry of the national economy has been the rapid development of electricity, power distribution network construction and transformation have been valued, and constantly improve the technical performance of distribution network equipment, the quality is particularly significant