无功补偿调压在接触网调压中的应用

Application of Reactive Power Compensation Voltage Regulation in Catenary Voltage Regulation

作为高速铁路列车电能主要来源的接触网,其输出电压是否符合要求是保证高速铁路正常运行的关键。由于电力机车在运行的过程中作为单相脉冲负荷,其线性差、波动性大,或产生较大的负序谐波,从而造成牵引供电系统接触网的功率因数降低,致使接触网无功功率过剩,引起接触网电压升高。因此,在接触网系统中需要采取无功补偿的方式,抵消接触网系统中的无功功率,保证接触网电压保持在符合电力机车运行要求的范围内,保证高速铁路的安全、可靠运行。无功补偿调压是一种有效的调节铁路接触网电压的方式,通过增加系统的感性无功功率对过剩的容性无功功率进行补偿,从而将系统的电压控制在允许的范围,保证系统电压的稳定。本文首先简要分析接触网无功负荷特性,分析目前我国常用的接触网无功补偿方法及应用,再以动态无功补偿装置在实际现场的应用效果作为分析,以期为接触网无功补偿工作提供参考。

Catenary is the main source of power for high-speed railway train, whose output voltage is the key to ensure the normal operation of the high-speed railway. It is necessary to take reactive compensation to offset the reactive power in catenary system, to ensure catenary voltage maintain in accordance with the requirements of the electric locomotive running range, so as to guarantee the safe and stable operation of high speed railway. Reactive compensation voltage regulation is a kind of effective way of railway catenary voltage adjustment, which can keep system voltage stable. This article first simply analyzes the reactive power load characteristic of catenary, analyzes the catenary reactive compensation method and application in China, and then analyzes the application effect of dynamic reactive power compensation equipment, in order to provide reference for catenary reactive compensation work.