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针对当前我国电气化铁路处于新旧技术的交替阶段、交直机车与交直交机车(动车组)混跑、牵引供电系统谐波含量丰富的情况,介绍了国内外电气化铁路谐波治理技术,重点介绍了指定次谐波电流分频控制研究现状;从电气化铁路的供电特点,分析低次、高次谐波分布;研究了以模块化多电平变换器为主电路拓扑的铁路功率调节器的谐波抑制技术,并将其与无源高通滤波器相结合,提出一种适用于牵引供电系统的谐波抑制策略,实现指定次谐波与高次谐波的抑制。在RT-LAB平台下搭建了仿真模型,仿真结果验证了该控制策略的可行性。
In view of the current situation that the electrified railway is in the alternation phase between the old and the new technology, the hybrid harmonic locomotive with the locomotives and crossover locomotives and the traction power supply system are rich in harmonic content. The harmonic control technology of the electrified railway at home and abroad is introduced, The research status of subharmonic current crossover control; analyzing the distribution of low-order and high-order harmonics from the characteristics of the power supply of the electrified railway; the harmonic suppression of the railway power conditioner with the multi-level converter as the main circuit topology is studied Technology, and combines it with passive high-pass filter to propose a harmonic suppression strategy suitable for traction power supply system, to achieve the specified subharmonic and higher harmonic suppression. The simulation model is built under the RT-LAB platform. The simulation results verify the feasibility of the control strategy.