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中文摘要：
研究基于三相-单相变换器的同相牵引供电系统的均流性能.该系统可以完全取消牵引网电分相装置,在牵引网和电网间可以直接进行有功传递,极大改善了电能质量,是一种理想的同相牵引供电系统.建立了该系统的两变电所并网模型与牵引网阻抗模型,分析了系统环流特性和下垂特性,得出该系统具有下垂外特性,可以运用下垂控制实现多个变换器并联运行,并实现系统均流控制,在此基础上给出了该系统的并网控制方法.仿真结果验证了理论分析的正确性.
英文摘要：
The current-sharing performance of an ideal co-phase traction power supply system is studied,which,based on the three-phase to single-phase converter,transfers directly the active power between power grid and traction network to completely cancel the neutral-section device and greatly improve the quality of electric energy.Its dual-substation model and traction network impedance model are established and its circulation and droop characteristics are analyzed,which shows that,with the droop external characteristic,the parallel operation of multiple converters can be implemented by the droop control to achieve the current sharing.The method of grid-connection control is given and the simulative results demonstrate the correctness of theoretical analysis.
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