论文部分内容阅读
为解决铁路供电负序问题,同时兼顾无功补偿与谐波治理,由2个单相模块化多电平换流器(modular multilevel converter,MMC)背靠背连接构造铁路功率调节器(MMC-RPC),并直接接入牵引网。较传统RPC而言,取消了降压变压器,提高了直流电压,减小了直流端电流。针对铁路供电,分析单相系统的电压与功率间的数学模型,设计了一种无需系统角频率和电感参数的直接功率控制策略(direct power control,DPC)。以V/v牵引变为例,在Matlab/Simulink中搭建仿真模型,仿真结果验证了所提策略的有效性。
In order to solve the problem of negative sequence of railway power supply and to take both of reactive power compensation and harmonic control into account, a railway power conditioner (MMC-RPC) is connected back to back by two single-phase modular multilevel converters (MMCs) , And direct access to the traction network. Compared with traditional RPC, the step-down transformer is canceled, the DC voltage is increased, and the DC current is reduced. Aiming at the railway power supply, the mathematical model of voltage and power in single-phase system was analyzed and a direct power control (DPC) method was designed without the need of system angular frequency and inductance parameters. Taking V / v traction as an example, a simulation model is built in Matlab / Simulink, and the simulation results verify the effectiveness of the proposed strategy.