利用电压及电流双端测量信息的高压输电线路正序参数测量方法及应用

An Approach to Measure Positive-Sequence Parameters of HV Transmission Line by Using Two-Terminal Measured Voltage and Current Data and Its Application

利用全球卫星定位系统同时测量输电线路首末两端的三相电压和三相电流,提出了利用输电线路的双端电压及电流测量信息的高压输电线路正序参数测量方法。给出了正序参数测量步骤及计及分布电容影响的正序阻抗和正序电容计算公式,并给出了测量系统的硬件结构。仿真与实测结果验证了该方法的可行性。

Based on the simultaneously measured data of three-phase voltages and currents at both ends of transmission line by global positioning system （GPS）, an approach to measure positive-sequence parameters of HV transmission line, in which the simultaneously measured two-terminal information of voltages and currents of transmission line is used, is proposed. The procedures of measuring positivesequence parameters as well as calculation formulae for positive-sequence impedance and capacitance, in which the influence of distributed capacitance is taken into account, are given, and the hardware structure of the measuring system is described. Results of simulation and actual measurements show that the proposed approach is feasible.