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中文摘要：
以电气化高速铁路牵引网谐波谐振问题为研究背景,提供谐波谐振抑制方案为研究目标,从列车车载设备角度出发,提出一种基于单相LCL脉冲整流器的牵引网谐波谐振抑制方法。主要研究工作为：首先,分析了牵引供电网与交-直-交列车耦合系统谐波谐振的产生机理,提出了在列车牵引传动系统网侧变流器前端采用LCL型替代L型滤波器的谐振抑制方法;其次,建立了单相LCL脉冲整流器的数学模型,分析其电压电流双闭环控制算法;最后,基于Matlab/Simulink搭建了牵引网-列车牵引传动系统电气耦合的联合仿真模型,并对单相LCL型脉冲整流器与传统单相L型整流器进行了仿真对比研究。仿真结果表明,基于LCL滤波器的网侧整流器可有效减少列车网侧电流中的高次谐波,能够有效地抑制牵引网谐波谐振现象发生,为治理车网耦合谐波谐振提供了新的思路。
英文摘要：
To study the harmonic resonance phenomenon of traction power network having occurred in high- speed electrified railway, a single-phase PWM rectifier with LCL filter mounted in the locomotive was proposed for harmonic resonance suppression. Firstly, the generation mechanism of coupling harmonic resonance be- tween traction power network and AC-DC-AC electric locomotive was analyzed. A harmonic resonance sup- pression scheme was proposed, where LCL filter was used to replace L filter in the front-end of the line-side converter of locomotive traction drive system. Secondly, the mathematical model of single-phase LCL-type PWM rectifier was established to analyze the dual closed-loop control strategy with voltage and current loops. Finally, a comparative study between single-phase LCL-type and conventional single-phase L-type PWM rectifi- ers was conducted on the combined simulation model of the electrical coupling of traction power network train electrical traction drive system built based on Matlab/Simulink. The simulation results showed that LCL- type PWM rectifier can effectively reduce high-frequency harmonics in the grid-side current of locomotive and suppress the harmonic resonance of traction power network, which provides a new solution to suppress the cou- pling harmonic resonance between traction power network and locomotive.
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