利用广义诺顿定理调整输电线路参数不对称性的方法  

Method of adjusting parameter asymmetry for transmission line using generalized Norton theorem

作　　者：董清[1] 李璐 李娟 DONG Qing;LI Lu;LI Juan(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China;Handan Power Supply Company,State Grid Hebei Electric Power Co.Ltd.,Handan 056035,China)

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003 [2]国网河北省电力有限公司邯郸供电分公司,河北邯郸056035

出　　处：《沈阳工业大学学报》2019年第5期489-494,共6页Journal of Shenyang University of Technology

基　　金：河北省自然科学基金资助项目(E2015502046)

摘　　要：为了降低高压输电线路上的不对称电压,维持电网的稳定运行,提出基于三相高压输电线路的诺顿等值电路.将不对称的线路参数看作诺顿等值电路的等效导纳,通过调节末端变电站中静止无功补偿设备的投切量,使其端口电压接近三相对称,从而达到降低线路上不对称电压的目的.理论计算结果及Matlab仿真分析表明,该方法可以使得线路末端电压的不平衡度降到最低,从而改善整条线路的不对称状况.In order to reduce asymmetric voltage on high voltage transmission line and maintain stable operation of power grid,a Norton equivalent circuit based on the three-phase high voltage transmission line was proposed.The asymmetric line parameters were treated as the equivalent admittance of Norton equivalent circuit.Through adjusting the switched amount of static reactive-power-compensation equipment in the terminal substation,the port voltage was close to the three-phase symmetry so as to achieve the purpose of reducing asymmetric voltage on the line.The results of theoretical calculation and Matlab simulation analysis show that the as-proposed method can make the voltage unbalance degree at line terminal reach the minimum value and effectively improve the asymmetric state of whole line.

关 键 词：线路参数 三相不对称 广义诺顿定理 等效导纳矩阵 无功补偿 投切电容器 电压不平衡度 MATLAB仿真 

分 类 号：TM[电气工程]