并联电抗器降损成效分析及节电量简化计算方法  

Effect Analysis of Loss Reduction and Simplified Calculation Method of Power Saving for Shunt Reactor

作　　者：陈哲 何柳 李双伟 CHEN Zhe;HE Liu;LI Shuangwei(State Grid Jiangsu Electric Power Co.,Ltd.,Research Institute,Nanjing 211103,China;State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210024,China)

机构地区：[1]国网江苏省电力有限公司电力科学研究院,南京211103 [2]国网江苏省电力有限公司,南京210024

出　　处：《电力电容器与无功补偿》2023年第2期18-24,共7页Power Capacitor & Reactive Power Compensation

摘　　要：高电缆化率电力网络负荷低谷期间线路剩余充电功率大,在变电站配置并联电抗器是重要平衡方式,并联电抗器投运后降损效益是衡量配置与运行是否合理的重要依据。文中首先分析了无功补偿装置的降损原理,提出了无功装置投运后对电网损耗影响的4种典型方式。其次,通过对高电缆化率电力网络并联电抗器投运前后功率损耗理论推导,提出影响并联电抗器降损效果的主要因素。然后基于现有无功经济当量的定义,推导出一种简化的并联电抗器节电量计算方法。最后,以某省220 kV分区电网为例进行无功补偿装置投运前后仿真计算,证明结论和方法的有效性。The residual charging power of the line in power network with high cabling rate is large during the low load period.The configuration of shunt reactor in the substation is an important balance way.The loss reduction benefit after operation of shunt reactor is an important basis to measure whether the configuration and operation are reasonable.Firstly,the loss reduction principle of reactive power compensation device is analyzed in this paper,and four typical ways of the impact of reactive power compensation device on power grid loss after operation are proposed.Then,the main factors affecting the loss reduction effect of shunt reactor are proposed through the theoretical derivation of the power loss before and after the operation of shunt reactor in high cabling rate power network.After that,a simplified calculation method of shunt reactor energy saving is derived based on the existing definition of reactive economic equivalent.Finally,a 220 kV regional power grid of a typical province is taken as an example for the simulation calculation before and after operation of the reactive power compensation so to prove the effectiveness of the conclusions and methods.

关 键 词：并联电抗器 降损 无功经济当量 节电量计算 

分 类 号：TM472[电气工程—电器]