一种非对称输电线路参数计算方法

A method of non-symmetric overhead transmission line parameter measurement calculation

为求解单回和同塔双回不对称输电线路参数,提出了一种基于π型电路的非全相加压测量计算方法。根据线路列写求解参数的方程组,由于方程是欠定的,提出利用线路非全相运行来获得额外的首末端电压电流相量的方法,增加独立方程的数量使得各相参数得到精确求解,通过MATLAB中的Simulink模块对测量方法进行仿真验证,可得该方法测量精度高、操作方便,满足了工程要求,提高了现场测量效率。

In order to solve the parameters of single-circuit and double-circuit asymmetric transmission lines on the same tower,this paper proposes a non-full-phase voltage measurement calculation method based on the type circuit.First of all,the equations for solving the parameters are written according to the line sequence.Since the equations are underdetermined,a method of using the line non-full phase operation to obtain additional head-end voltage and current phasors is proposed.The number of independent equations is increased so that the parameters of each phase can be accurately solved.The simulation calculation method is verified by MATLAB Simulink Module.Taking asymmetric and single-circuit double-circuit lines on the same tower as an example,the simulation results show that the measurement accuracy is good and the operation is convenient.It meets the engineering requirements and improves the efficiency of on-site measurement.