轨道交通供电系统功率因数分析及补偿方案研究

研究目的:近年来我国轨道交通建设事业迅猛发展,但功率因数问题一直是困扰轨道交通供电系统的重要问题,常常导致电力部门的高额罚款。为提高功率因数,需对无功补偿方案进行研究。在分析国内城市轨道交通供电系统无功补偿现状的基础上,通过对整个供电系统综合功率因数的分析计算,研究几种无功补偿方案,并最终确定一种新的综合无功补偿方案。研究结论:城市轨道交通线路的无功补偿方案应根据自身供电系统的实际情况,并通过综合功率因数分析计算或实测分析,来综合考虑采用高压、低压侧相结合的无功补偿方案;在条件允许时,建议采用主所设SVG+各车站变电所0.4 kV侧设APF的综合补偿方案。

Analysis of Power Factor for Power Supply System of Urban Rail Transit and Research on the Method of Compensation

Research purposes: In recent years,the rapid development of Urban Rail Transit,but the power factor is a important question to power supply system of Urban Rail Transit,often leading to heavy fines.To improve the power factor,it is necessary to research the method of reactive power compensation;Based on the analysis of domestic power system reactive power compensation and calculation of the integrated power factor to the whole power supply system,several methods of reactive power compensation are researched,and provided a new method of reactive power compensation. Research conclusions:The method of reactive power compensation should be according to the actual situation of their own power supply system,through the comprehensive power factor calculation or actual analysis,and the method to consider high voltage and low voltage is advised.If conditions allow,it is suggested that the main power substation with SVG + station substation 0.4 kV side with APF.