To improve the power quality of dc traction power supply system (DC-TPSS), a magnetic-integrated multipulse rectifier transformer (MI-MPRT) with a tight impedance equalizing strategy is proposed in this article. The configuration and winding-arrangement of MI-MPRT are introduced, and by integrating multiple windings on a same iron core, the volume and cost of the proposed transformer can be decreased significantly. Cooperated with the staggered winding-arrangement, a tight impedance equalizing strategy is proposed to optimize the winding thickness and insulation distance comprehensively, and MI-MPRT would be designed in a minimum axial dimension, with equalizing short-circuit impedance of each winding. A high-power prototype is manufactured, and the efficiency of prototype is verified by the transformer standard test. In addition, the DC-TPSS based MI-MPRT is implemented, and the experiment results validate that the power quality of new system can be improved significantly by harmonic elimination, circulation-currents suppression, and dc-voltage ripple restraint. Both the theoretical and experimental results indicate that the proposed MI-MPRT is suitable for power quality improvement and industrial application in DC-TPSS.

中文翻译：

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具有紧阻抗均衡策略的磁集成多脉冲整流变压器改善直流牵引供电系统的电能质量


为了提高直流牵引供电系统（DC-TPSS）的电能质量，本文提出了一种具有严格阻抗均衡策略的磁集成多脉冲整流变压器（MI-MPRT）。介绍了MI-MPRT的配置和绕组布置，通过将多个绕组集成在同一铁芯上，可以显着降低变压器的体积和成本。配合绕组交错排列，提出了紧密的阻抗均衡策略，全面优化绕组厚度和绝缘距离，将MI-MPRT设计在最小的轴向尺寸内，均衡各绕组的短路阻抗。制作了大功率样机，并通过变压器标准测试验证了样机的效率。此外，还实现了基于DC-TPSS的MI-MPRT，实验结果验证了新系统通过谐波消除、环流抑制和直流电压纹波抑制可以显着改善电能质量。理论和实验结果表明，所提出的MI-MPRT适用于DC-TPSS的电能质量改善和工业应用。