基于全球定位系统与积分方程的互感线路零序参数带电测量

首先简要回顾了通常获取输电线路参数的三种方法,然后在增量法的基础上提出了基于全球定位系统(Global Position System,GPS)和积分方程的互感线路参数带电测量方法(简称积分法).该方法将互感线路的伏安特性方程转化为积分形式,并采用了最小二乘法求解测量中出现的超定方程组,同时得出各线路的零序自阻抗及线路间的零序互阻抗.文中给出了详细的数学模型和数字仿真结果以及软件算法流程图与实际测量结果,并将积分法计算结果与增量法的计算结果进行了比较,比较结果表明积分法的测量结果是精确可信的.

LIVE LINE PARAMETER MEASUREMENT OF TRANSMISSION LINES WITH MUTUAL INDUCTANCE BASED ON GPS TECHNOLOGY AND INTEGRAL EQUATIONS

After briefly reviewing three methods which are usually applied to measure transmission line parameters, on the basis of incremental method a live line parameter measurement approach for transmission lines with mutual inductance based on GPS technology and integral equations (abbr. integral equation method) is proposed. In this method the volt-ampere characteristic equation is transformed into integral equation and by use of least square method the overdetermined sets, which appear during the measurement, are solved, at the same time the zero-sequence self-impedance and zero-sequence mutual impedance among transmission lines are obtained. The detailed mathematical model, simulation results, the flow chart of the algorithm and actual measurement results are given, and the calculation results by integral equation method are compared with those by incremental method. The comparison result shows that the measured results by integral equation method are accurate and believable.