为解决高速电气化铁路负序和更高次谐波等电能质量问题,提出基于模块化级联H桥与V/V接线变压器相结合的有源补偿同相牵引供电系统.设计了基于模块化级联H桥的"Γ"型直挂型有源补偿装置(MMCHC)拓扑结构,分析补偿特性及工作原理,并给出子模块参数确定方法.与传统同相牵引供电系统相比,本方案有效解决电压等级和功率要求,节省了匹配变压器,并具备更好的过载能力.通过稳态和动态仿真分析验证了本文所提方案的有效性与正确性.%To address the power quality problems of high speed railway such as negative sequence and higher or-der harmonic,an active compensation co-phase traction power supply system based on modular multilevel cas-caded H bridge and V/V connection transformer was proposed.The "Г"type active power compensation to-pology based on modular multilevel cascaded H bridge was designed,to analyze the characteristics and working principle of the compensation,and to give the method of determining the parameters of the submodule.Com-pared with the traditional co-phase traction power supply system,the proposed method,combined with the modular multilevel cascaded H Bridge compensator(MMCHC)with the Vv transformer,effectively met volt-age rating and power requirements,saved the matching transformer,and had better overload capacity.The steady state and dynamic simulation analysis proved the effectiveness and correctness of the proposed method.
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