Integrated protection scheme for hybrid AC/DC transmission grids

IF 5 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Electrical Power & Energy Systems Pub Date : 2025-06-09 DOI:10.1016/j.ijepes.2025.110806

Qi Liu, Xu Chu, Letian Fu, Shaoshuai Yu, Weidong Wang

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引用次数: 0

Abstract

Given the limited Right-of-Way (ROW) for transmission lines, AC and DC transmission lines are transferred in parallel and adjacent to each other, forming a hybrid AC/DC transmission overhead line system for the consumption of renewable energy. The system is affected by extreme weather or complex external environment, which is easy to induce AC/DC intersystem fault (ISF). As a new fault type, the unique phenomenon and characteristics of ISF challenge the conventional protection concepts. This paper analyzes the fault characteristics of hybrid AC/DC transmission overhead line system based on “Yang-Zhen” project in China. And the focus is on AC/DC intersystem faults, i.e. galvanic contact between DC and AC systems. On this basis, a new integrated protection scheme of hybrid AC/DC transmission overhead lines which can adapt to ISF is proposed in this paper. The findings of this paper are based on semi-physical simulation platform with detailed RTDS-models of the hybrid AC/DC overhead lines and the LCC-converters. The proposed protection scheme tests have been conducted and confirmed the results.

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交直流混合输电网综合保护方案

考虑到输电线路的通行权（Right-of-Way， ROW）有限，交流输电线路与直流输电线路并联、相邻传输，形成了可再生能源消纳的交直流混合输电架空线路系统。系统受到极端天气或复杂外部环境的影响，容易诱发交直流系统间故障（ISF）。ISF作为一种新型的故障类型，其独特的现象和特点对传统的保护理念提出了挑战。本文以中国“阳震”工程为例，分析了交直流混合输电架空线系统的故障特征。重点是交直流系统间故障，即直流系统和交流系统之间的电接触。在此基础上，提出了一种适应ISF的交直流混合型架空线综合保护方案。本文的研究结果基于半物理仿真平台，并建立了交直流混合架空线和lc -变流器的详细rtds模型。所提出的保护方案已进行了试验并证实了结果。

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

International Journal of Electrical Power & Energy Systems 工程技术-工程：电子与电气

CiteScore

12.10

自引率

17.30%

发文量

1022

审稿时长

51 days

期刊介绍： The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces. As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.