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阻抗匹配平衡牵引变压器 主要完成单位:铁道部第二设计院、云南变压器厂、成都铁路局、湖南大学 该变压器是110kV侧引出中性点接地的三相变二相的新型牵引变压器。其接地方式是:电源侧为三相星形,牵引侧在三角形基础上增加两个外延平衡绕组。通过各绕组的阻抗匹配,在牵引侧两相负荷电流大幅度变化时,原边三相电流基本能保持平衡,降低了对电网的负序影响和通信的干扰。当供电两臂等负荷时,可使原边三相电流转化为“对称系”。 主要技术指标:(1)型号:SFY—20000/110—GY
Impedance Matching Balance Traction Transformer Major Completed by: The Second Design Institute of Ministry of Railways, Yunnan Transformer Factory, Chengdu Railway Bureau, Hunan University The transformer is a new type of three-phase to two-phase traction transformer with neutral point grounding at 110kV side. The grounding method is: the power side of the three-phase star, the traction side of the triangle based on the increase of two epitaxial balanced winding. Through the impedance matching of the windings, when the two-phase load current of the traction side changes greatly, the primary three-phase current can basically maintain the balance, reducing the negative sequence influence on the power grid and communication interference. When the power supply arms and other loads, the primary three-phase current can be converted to “symmetry.” The main technical indicators: (1) Model: SFY-20000/110-GY