| With the rapid development of China’s economy and society,the problems of low reliability and poor quality of power supply become more and more serious.The distribution network is directly connected with the users,and its development lags behind.Distribution Transformer is one of the most important power equipment in distribution network.Its intelligent Terminal Unit(TTU,Transformer Terminal Unit)is an important part of distribution automation system.By monitoring the real-time operation of distribution transformer,TTU can detect and deal with the fault of distribution transformer in time and improve the reliability of power supply.The situation of large number of transformers,distributed distribution,and insufficient reactive power compensation in distribution network is particularly prominent in China,There are big differences in economic development in various regions.The penetration rate of intelligent terminal of distribution transformer is wide.On the other hand,the high cost of TTU makes it difficult to promote distribution automation.Firstly,this paper introduces the development status of distribution automation at home and abroad,the significance and goal of this research.Then it expounds the operation state evaluation index of distribution transformer in laiwu area,the overall design scheme of hardware circuit and software system,and puts forward the idea of"hardware modularization,software appification".The software is appified with the mode of "network + brain + a group of apps + data combination analysis",which can realize such artificial intelligence functions as active repair of low-voltage faults,orderly charging management of charging piles,automatic identification of low-voltage load access,and comprehensive power quality management.Then the laboratory test and pilot application of distribution transformer intelligent terminal are introduced emphatically.The results show that the intelligent terminal achieves the expected effect and design requirements,operates reliably and stably,and improves the safety and economic operation level of distribution transformer. |
