Takeing Little Current Electricity Technology Research Of Current Transformer In Distribution Network Automation Terminal

Along with our country industrialization level and people’s standard of living rise further, not only embodies in the number of demand for electricity, and higher and higher requirements about the quality of the electricity. Distribution network automation is real-time remote monitoring, control and coordinate the distribution network terminal operation of various types of equipment, in order to realize the distribution network safe, stable and reliable operation of a system. Distribution network automation terminal power supply is an important content of distribution network automation requirements, is the bottleneck which restrict the development of the distribution network automation.The current distribution network automation terminal power supply modes are more, They are shortcomings to some extent because of the limitation of electrical technology and manufacturing materials.Therefore,researching a kind of small volume, low cost, convenient production and installation, and maintenance free, long life of the current transformer power supply of distribution network automation terminal power supply has boh timportant theoretical value and practical significance.First of all, This paper researchs the main principle of current transformer induction electric. Secondly, the features of CT no-load operation,load operation and main electromagnetic relationship are analyzed. Finally, the paper analysis the output power of the CT, at the same time, This paper introduces the current transformer structure which workd in series and in parallel. All of them Takes for later current transformer which lay a theoretical foundation for the design of the electric power system.Based on current transformer induction electric principle,the paper puts forward in the small current state of a power supply of distribution network terminal power supply method. The method uses multiple draw-out current transformer, gathering current transformer secondary type current transformer topology structure, Applies to the thinking of "time in energy", Devises a can for terminal electrical equipment in distribution network under no-load condition to provide "cyclical" the power of current transformer in electric power system.This article has carried on the dynamic model experiments with the draw-out current transformer and gathering current transformer and current transformer for electric power supply principle prototype. The basic properties of draw-out current transformer and current transformer is analyzed.This article verifies the performance of the power supply prototype.The result of the experiments are in positive with the analysis and the prototype ment the design requirements.