A New Measurement and Calculation Method for Phase Parameters of Double Circuit Transmission Lines on the Same Tower

被引：0

作者：

Yang G. ^{[1
]}

Fu Z. ^{[2
]}

Cheng Y. ^{[2
]}

Zhao A. ^{[2
]}

Xia L. ^{[2
]}

Liu Y. ^{[2
]}

Zhao Y. ^{[1
]}

机构：

[1] College of Electrical and Automation Engineering, Hefei University of Technology, Anhui Province, Hefei

[2] State Grid Anhui Electric Power Research Institute, Anhui Province, Hefei

来源：

Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 06期

关键词：

distributed parameter model; double-circuit transmission lines on the same tower; Laplace transform; least square method; phase parameters; synchronous measurement;

D O I：

10.13335/j.1000-3673.pst.2022.1311

中图分类号：

学科分类号：

摘要：

The phase parameters of transmission lines are the basic ones for the line overvoltage calculation. It is necessary to obtain the phase parameters of AC the double-circuit lines on the same tower as a guidence for the operation of the project. In order to accurately obtain the phase parameters of the double-circuit AC transmission lines on the same tower, firstly, the transmission lines equation in the differential form is established. Then, the differential equation is deduced by the Laplace transform and the inverse transform, and the mathematical model for measuring the relationship between the phase parameters of the transmission line and the voltage and current at the head and the end of each phase conductor is obtained. In different ways, the voltage and current at the head and the end of each phase conductor are measured synchronously for many times, and the measured data are substituted into the model to solve the distributed phase parameters of the transmission line. The simulation results show that the maximum deviation for the 100-500km lines is 1.47%, which can be applied to lines with any length. It is a new phase parameter measurement and acquisition method, which meets the needs of the parameter accuracy for the overvoltage calculation of the power system. © 2023 Power System Technology Press. All rights reserved.

引用

页码：2522 / 2529

页数：7

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