为综合治理铁路牵引变压器的负序、无功、谐波问题,设计了基于模块化多电平换流器的铁路功率调节器(MMC-RPC).首先设计了频率自适应功率分离器,并从功率角度分析了Scott牵引变压器(STT)牵引供电系统综合治理的补偿量;然后在构造虚拟正交分量后建立了单相MMC数学模型,在同步旋转坐标系下分析机车谐波电流的特性,指出单相奇次谐波电流在dq坐标系下都以4的倍数次波动;最后提出了需要更少的谐振控制器数量的比例-积分-谐振控制策略.在Matlab中搭建MMC-RPC仿真模型进行仿真,结果证明了所提控制策略有效性.%In order to govern the problems of negative sequence, reactive power and harmonic in railway traction comprehensively, this paper designs a railway static power conditioner based on modular multilevel converter (MMC-RPC). The frequency adaptive controller of power separation is designed firstly, and then the amount of comprehensive governing to Scott traction transformer power supply system is analyzed from the angle of power. Thereafter, a virtual ac component is constructed and then the mathematical model of single-phase MMC is established. After the analysis of locomotive harmonic current characteristics under the synchronization rotating frame, it is shown that the single phase odd harmonic currents fluctuate by a multiple of 4 in dq frame. The design control strategy is then proposed, which needs less proportional-integral-resonant controllers. Finally, the results of a MMC-RPC simulation model in Matlab have verified the proposed control strategy.
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