适应线路电缆化的220 kV变电站无功补偿计算研究  

Research on Reactive Power Compensation Calculation of 220 kV Substation Adapting to Cabled Transmission Line

作　　者：徐志伟 吴星仪 蔡晖 XU Zhiwei;WU Xingyi;CAI Hui(Yangzhou Haochen Electric Power Design Co., Ltd., Yangzhou,Jiangsu 225000, China;Energy and Electrical Engineering Institute,Hohai University, Nanjing,Jiangsu 211100, China;Economic Research Institute of State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing,Jiangsu 210008, China)

机构地区：[1]扬州浩辰电力设计有限公司,江苏扬州225000 [2]河海大学能源与电气学院,江苏南京211100 [3]国网江苏省电力有限公司经济技术研究院,江苏南京210008

出　　处：《东北电力技术》2022年第5期6-9,共4页Northeast Electric Power Technology

摘　　要：随着市区220 kV变电站供电线路电缆规模逐步扩大,针对220 kV电网无功倒送严重,供电电能质量下降等问题,提出了一种适应线路电缆化的220 kV变电站无功容量配置方法。首先建立变电站高峰负荷/低谷负荷功率因数模型,然后按功率因数达标所需补偿的最低无功量为原则计算无功设备容量值,建立无功补偿功率因数模型检验不同负荷条件下无功补偿后的功率因数,最后通过迭代循环计算得到精度较高的无功设备容量。该方法计算简单快捷,可充分发挥无功设备最大经济效益,降低无功设备投资费用。With the gradual expansion of power supply line cable scale in urban 220 kV substation,according to the serious reactive power reverse of 220 kV power grid and the decline of power supply quality,a reactive power capacity allocation method for 220 kV substation adapting to cabled transmission line is proposed.Firstly,the peak load/valley load power factor model of substation is established.Then the capacity of reactive power equipment is calculated according to the principle of the minimum reactive power required to be compensated when the power factor reaches the standard.The power factor model of reactive power compensation is established to test the power factor after reactive power compensation under different load conditions,and the capacity of reactive power equipment with high accuracy is obtained through iterative cycle calculation.The calculation method is simple and fast,which can give full play to the maximum economic benefit of reactive power equipment and reduce the investment cost of reactive power equipment.

关 键 词：无功补偿 电缆线路 功率因数 电容器 电抗器 

分 类 号：TM714.3[电气工程—电力系统及自动化]