中文摘要：

贯通式同相供电系统作为一种新型牵引供电系统，通过电力电子技术实现牵引网的全线贯通。彻底取消了牵引网上的过分相装置。以五电平三相／单相变换器的贯通式同相供电系统为例。分析了两变电所之间的环流特性，同时基于下垂控制的思想，提出一种适用于该系统的并网控制策略，相对于传统下垂控制方案受限于其固定系数而无法快速调节变电所功率输出的不足，该方案能根据机车负载的投切实时控制各个变电所的功率输出，使系统达到预期的运行效果。仿真和实验表明，在该控制策略的作用下各变电所输出电压的幅值、相位、频率能与牵引网实时保持一致且系统能较好地稳定运行，验证了所提控制策略在贯通式同相供电系统中应用的合理性和可行性。

英文摘要：

The advanced co-phase power supply system is a new type of traction power supply system in which power electronic technology is utilized to achieve through type traction network and abolish completely the crossing neutral section device.An control strategy is proposed to get identical output voltage amplitude,phase,frequency of all sub- stations with the power grid.The control strategy is analyzed and verified for its feasibility under the condition of working vehicle with load.Finally, simulation and experiment show the correctness of application in advanced eo-phase power supply system of three-phase and single-phase transform converter with five level.