基于数字仿真的输电线路参数量测系统设计

Design of Transmission Line Parameter Measurement System Based on Digital Simulation

为解决传统输电线路量测方法带来的干扰和误差,提出了一种利用实时数字仿真的输电线路参数量测方法。首先建立了输电线路正序等效模型。结合输电线路的工作特性,利用高频信号仿真研究工频信号下的线路特性,并提出利用差分运算放大器测量线路电流、利用模拟乘法器测量线路有功和无功,说明了微缩台架的设计原理。结合实际线路对所提方法进行了仿真实验,说明了该方法的有效性。

In order to solve the interference and errors caused by traditional transmission line parameter measurement methods, a transmission line parameter measurement system using real-time digital simulation is proposed. Firstly, the positive sequence equivalent model of the transmission line is established. Combined with the working characteristics of the transmission line, high-frequency signal simulation is used to study the line characteristics under the power frequency signal. The differential operational amplifier is used to measure the line current, the analog multiplier is used to measure the active and reactive power of the line, and the design principle of the miniature bench is explained. The simulation test of the method is carried out in combination with the actual circuit, which shows the effectiveness of the proposed method.