The Modelling, Emulation And Application Of The Typical Load Curve Of Traction Transformer

Traction transformer is one of the most important electrical equipments in the traction substation. The status of traction transformers directly influences the stability and reliability of the traction power supply system. So the method of making the typical load curve of traction transformer is great significant.The twenty four hours' current and voltage data of the some transformers in one day are noted and used as the actual load. This paper is based on the process of traction load and the rules of statistics. The temperature raise of the main transformer of the traction substation of electrical railway is discussed, and the typical load curve of traction transformer is made.The formula of temperature raise by IEC354 Loading Guide for Oil-immersed Transformers is utilized to make the model of temperature raise and life loss. Under actual load course, proceeding from mathematical statistics and the view of the probability, the typical load curve of traction transformer reflecting the actual load is gotted. At the same time, the temperature raise and life loss of the traction transformer are calculated.In contrast with the experienced values of the book, the typical parameters by calculating the actual data are analysed. At the same time the hot-spot temperature of the existing typical load curves of traction transformer are validated. And the rationality and the method of improving the availability of the traction transformer are analysed by calculating the actual load of traction substation of Deyang, Jiangyou, Taibai, Wujiang and Yongchuan.On the basis of Delphi6.0, Tylocal .0 is developed to analyse the typical load curve of traction transformer. Tyloca1.0 has a popular GUI, and has the characters of class's hierarchy and opening, which makes it easy to expand, maintain and replant. And it will be the basic of futher studying.