客运专线牵引供电系统谐波通用模型研究

Study on Harmonic Model of Traction Power Supply System of Passenger Dedicated Line

建立了牵引供电系统中各元件的谐波模型。基于牵引变电所端口电气量通用变换关系,得到不同相序和不同牵引变压器接线形式下的牵引供电系统通用谐波等值电路。通过链式结构将牵引网、电力机车、变电所和电网统一起来进行谐波计算,从而得到电网侧各相谐波电压大小及畸变率。对比仿真结果与实测数据表明,本文所建立的牵引供电系统谐波数学模型具有良好的通用性和较高的精度,满足工程设计要求。

This paper introduces harmonic model of each component which constituts traction power supply system. According to general transform relation among terminal electric quantities of traction substation, the general harmonic equivalent circuit suitable to traction substation connected to different winding connection modes of transformers and different phase sequences. The traction-networks, electric locomotive, substation and power network are unified by chain-structure, and the magnitude of each phase harmonic voltage, harmonic current and total harmonic distortion can be obtained by harmonic calculation. By comparison between simulation results and measured data, this harmonic math-model of traction power supply system has a good flexibility and accuracy which can be used in project design.