Abstract
At this stage, influenced by the rapid economic, China's electricity demand is also increasing at an average annual rate of more than 10% which has posed great challenges to the power industry, so ensuring the stability and reliability of the power system has gradually become a common requirement of society. The characteristics of 10kV distribution network which is as the basis of power system structure features wide coverage, long lines, high risk of fault in the operation, therefore, a good daily maintenance work and high reliability of its operation are becoming one of the most urgent task.