一种牵引供电系统高次谐波滤除的新方法-《高速铁路技术》

文章信息/Info

Title:: A New Method of Filtering Higher Harmonic in Traction Power Supply System

Author(s):: ZHANG Lu; China Railway Lanzhou Bureau Groups Co., Ltd., Lanzhou 730030, China

Keywords:: traction power supply|higher harmonic|chaos|simulation verification

摘要:: 为减少高次谐波对牵引供电系统的影响，本文从谐波源入手，分析了高次谐波为牵引供电系统带来的危害。结合混沌理论在谐波滤除方面的优势，提出在牵引供电系统接收端滤除高次谐波的思想，运用混沌系统逆相变思维，对既有滤波系统进行改进，解决了高次谐波存在初相角可能导致系统"漏滤"的情况。通过搭建模型，在滤波系统中加入淹没在高次谐波中的牵引电流基波，给出了滤波步骤，得出最终经过系统的是对牵引供电系统不产生影响的基波。仿真验证了该方法的可行性，此方法为牵引供电系统高次谐波的滤除提出新思路。

Abstract:: In order to reduce the influence of higher harmonic on the traction power supply system, the harm of higher harmonic to the traction power supply system is analyzed from the harmonic source in this paper. Combined with the advantages of chaos theory in harmonic filtering, the idea of filtering higher harmonic at the receiving end of traction power supply system is proposed. By using the thought of inverse phase transition of chaotic system, the existing filtering system is improved, so as to solve the problem that the initial phase angle of higher harmonic may lead to "leakage" of the system. By building the model, adding the fundamental wave of the traction current submerged in the higher harmonic in the filtering system, the filtering steps are given and it is concluded that the fundamental wave passing through the system has no impact on the traction power supply system. The feasibility of this method is verified by simulation, and a new idea is put forward for filtering the higher harmonics in traction power supply system.