城市轨道交通供电系统无功功率研究

Study on reactive power of urban rail transit power supply system

对城市轨道交通供电系统无功功率进行分析、计算,阐明无功功率的分布特点。针对计量考核点位于市区变电所,110 kV电缆线路较长而引起考核点功率因数不达标的现象,结合高压动态无功补偿发生装置(SVG)的工作原理,总结出一种简单易行的调整考核点无功功率平衡措施。根据系统有功电量与110 kV电缆无功电量的比值大小,合理设置SVG装置运行参数,以提高供电系统的运行经济性。

This paper analyzes and calculates the reactive power of urban rail transit power supply system, and expoundes the distribution characteristics of reactive power. Aiming at the phenomenon that the power factor of 110 kV cable line is not up to the standard due to the measurement and assessment point located in the urban substation, it summarizes a simple and feasible measure for adjusting the reactive power balance of the assessment point based on the working principle of high voltage dynamic reactive power compensation generator(SVG). With the ratio of active power to reactive power of 110 kV cable, the operation parameters of SVG device are reasonably set to improve the operation cost effectiveness of the power supply system.