地铁供电系统无功功率问题分析研究  

Analysis and Research on Reactive Power of Metro Power Supply System

作　　者：吴其玉 WU Qiyu(Nanchang Rail Transit Group Co.,Ltd.,Nanchang 330038,China)

机构地区：[1]南昌轨道交通集团有限公司,江西南昌330038

出　　处：《通信电源技术》2021年第10期15-20,共6页Telecom Power Technology

摘　　要：地铁供电系统中通过大量的电缆向各用电设备传输电能,列车夜间停运后整个系统负荷较小,使得夜间整个系统功率因数较低且向上级电网倒送容性无功功率,因此需要采用相关无功补偿装置进行补偿。针对地铁供电系统无功问题,分析研究了地铁供电系统无功补偿设备。首先介绍了地铁低压供电系统方案、电力部门对无功考核要求以及无功功率计算过程,其次研究了3种常见集中无功补偿设备的工作原理,最后通过工程实际案例对无功功率进行简单计算,分析无功补偿装置的配置方案。In the power supply system of metro,a large number of cables are used to transmit electric energy to all electric equipment,and the load of the whole system is small after the train is stopped at night,which makes the power factor of the whole system at night low and the capacitive reactive power is inverted to the upper power grid.In view of the reactive power problem of metro power supply system,this paper analyzes the reactive power problem of metro power supply system and studies the reactive compensation equipment.Firstly,the scheme of metro power supply system,the requirements of reactive power assessment and reactive power calculation are introduced.Secondly,the basic working principle of common centralized reactive power compensation equipment is studies.Finally,the reactive power of metro is simply calculated and the configuration scheme of reactive power compensation device is analyzed through the actual project case.

关 键 词：供电系统 容性无功功率 无功补偿 

分 类 号：TM7[电气工程—电力系统及自动化]