牵引变压器过载能力的研究

Study on the Overload Capability of An Electric Traction Transformer

本文叙述了三相油浸变压器热点热传导数学模型的建立及计算方法的推导。通过变压器的热解剖试验获得了变压器的热阻抗矩阵元素,论证了变压器热点瞬态温升电算方法的正确性和实用性。最后给出了三相牵引变压器的过载能力曲线组,供设计、运行单位使用。全面透彻地分析了牵引变压器的过载能力。

This paper described the establishment of the mathematical model for hot-spot thermal conductance of oil three-phase transformer and the deduction of the involved calculation method. Elements of transformer thermal impedance matrix are obtained by using the Thermal Dissection Test of a transformer. The correctness and applicability of the computer calculation method for instantaneous-state hot-spot temperature rise of transformer are discussed and proved in the paper. A group of overload capability curve of three-phase electric traction transformer is given for use by design and operation units. The overload capability of electric traction transformer is analysed comprehensively and thoroughly.