A Novel Fault Location Method for HVDC Transmission Lines Based on the Wavefront Characteristics of Line-Model Component of Fault Voltage

IF 3.8 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Power Delivery Pub Date : 2024-10-01 DOI:10.1109/TPWRD.2024.3471780

Dalin Mu;Sheng Lin;Xiaopeng Li;Zhengyou He;Xinzhou Dong

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Abstract

A high voltage direct current (HVDC) transmission line fault location scheme based on the fitting coefficients of the line-model component of fault voltage (LMCFV) wavefront is proposed to address the problem of reduced accuracy in existing DC line fault location methods due to fault resistance. Firstly, the propagation characteristics of the LMCFV on the DC line are analyzed, and it is found that the LMCFV is mainly affected by the value of the fault resistance at the fault point and the dispersion during the DC line propagation. Therefore, a logistic function is used to fit the wavefront of the LMCFV, and a power function is constructed based on the mapping relationship between the fitting coefficients and the fault location. Finally, the fault position of the DC line is located by using the fitting coefficients of the LMCFV wavefront. The proposed method is implemented in a hybrid cascaded HVDC transmission system, and simulation results demonstrate that the fault location method is immune to the effects of fault resistance and does not require accurate wave speed. The proposed method exhibits high accuracy in fault location.

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基于故障电压线路模型分量波前特性的新型高压直流输电线路故障定位方法

针对现有直流线路故障定位方法因故障电阻而导致精度降低的问题，提出了一种基于故障电压线路模型分量（LMCFV）波面拟合系数的高压直流（HVDC）输电线路故障定位方案。首先，分析了 LMCFV 在直流线路上的传播特性，发现 LMCFV 主要受故障点的故障电阻值和直流线路传播过程中的色散影响。因此，采用对数函数拟合 LMCFV 的波前，并根据拟合系数与故障位置之间的映射关系构建幂函数。最后，利用 LMCFV 波前拟合系数定位直流线路的故障位置。仿真结果表明，故障定位方法不受故障电阻的影响，也不需要精确的波速。所提出的方法具有很高的故障定位精度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Power Delivery 工程技术-工程：电子与电气

CiteScore

9.00

自引率

13.60%

发文量

513

审稿时长

6 months

期刊介绍： The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.