基于改进相对距离偏差系数的海上风电柔性低频送出线路时域纵联保护

梁营玉; 徐嘉豪; 孟志超; 杨小洋

doi:10.19783/j.cnki.pspc.260059

欢迎来到能源电力期刊网！

English Version 期刊登录

您当前的位置：

首页 >

文章列表页 >

基于改进相对距离偏差系数的海上风电柔性低频送出线路时域纵联保护

应用研究 | 更新时间：2026-07-27

- 基于改进相对距离偏差系数的海上风电柔性低频送出线路时域纵联保护
- Time-domain pilot protection for offshore wind farm flexible low-frequency transmission lines based on an improved relative distance deviation coefficient
- 电力系统保护与控制 2026年54卷第12期
- 作者机构：
  
  中国矿业大学 (北京) 机械与电气工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.19783/j.cnki.pspc.260059
  中图分类号：
- 纸质出版：2026
- 稿件说明：
移动端阅览
梁营玉, 徐嘉豪, 孟志超, 等. 基于改进相对距离偏差系数的海上风电柔性低频送出线路时域纵联保护[J]. 电力系统保护与控制, 2026,54(12).

LIANG Yingyu, XU Jiahao, MENG Zhichao, et al. Time-domain pilot protection for offshore wind farm flexible low-frequency transmission lines based on an improved relative distance deviation coefficient[J]. Power System Protection and Control, 2026, 54(12).
梁营玉, 徐嘉豪, 孟志超, 等. 基于改进相对距离偏差系数的海上风电柔性低频送出线路时域纵联保护[J]. 电力系统保护与控制, 2026,54(12). DOI： 10.19783/j.cnki.pspc.260059.

LIANG Yingyu, XU Jiahao, MENG Zhichao, et al. Time-domain pilot protection for offshore wind farm flexible low-frequency transmission lines based on an improved relative distance deviation coefficient[J]. Power System Protection and Control, 2026, 54(12). DOI： 10.19783/j.cnki.pspc.260059.

摘要

海上柔性低频输电系统的故障响应特性与传统同步机组存在显著差异，可能导致传统电流差动保护拒动。为此，深入分析了柔性低频线路两侧电流所构成的电流曲线特性，提出一种基于相对距离偏差系数的纵联保护 (relative distance deviation coefficient-based pilot protection

RDDC-PP) 方法，可精准识别区内故障，并对异常数据和电流互感器测量误差具有固有鲁棒性。进一步利用洛伦兹变换对电流曲线进行改进，提出基于改进相对距离偏差系数的时域纵联保护方法 (improved relative distance deviation coefficient-based pilot protection

IRDDC-PP)，并设计自适应参数 α，使 IRDDC-PP 对同步误差和高斯白噪声等干扰也具有强耐受能力。采用数字 - 物理联合仿真平台对所提方法进行验证。结果表明，所提方法在不同过渡电阻、故障位置、故障类型及采样频率下均能准确动作，对电流互感器测量误差、异常数据、噪声和同步误差等干扰具有良好的鲁棒性，在速动性、灵敏性、信赖性和安全性方面均优于对比方法。

Abstract

The fault response characteristics of offshore flexible low-frequency AC transmission systems differ significantly from those of traditional synchronous generator based power systems

which may cause malfunction of conventional current differential protection. To address this issue

this paper conducts an in-depth analysis of the current curve characteristics formed by the currents at both ends of a flexible low-frequency transmission line

and proposes a relative distance deviation coefficient-based pilot protection (RDDC-PP) method. The proposed method can accurately identify internal faults and exhibits inherent robustness against abnormal data and current transformer (CT) measurement errors. Furthermore

the Lorentz transformation is employed to improve the current trajectories

and an improved relative distance deviation coefficient-based time-domain pilot protection (IRDDC-PP) method is developed. An adaptive parameter α is also designed to enhance the robustness of IRDDC-PP to disturbances such as synchronization errors and Gaussian white noise. The proposed method is validated using a digital-physical co-simulation platform. Simulation results demonstrate that the proposed method operates accurately under various fault resistances

fault locations

fault types

and sampling frequencies. In addition

it exhibits strong robustness against disturbances such as CT measurement errors

abnormal data

noise

and synchronization errors. Compared with existing methods

the proposed approach achieves superior performance in terms of speed

sensitivity

dependability

and security.

关键词

Keywords

references

XIANG Xin, FAN Shiyuan, GU Yunjie, et al. Comparison of cost-effective distances for LFAC with HVAC and HVDC in their connections for offshore and remote onshore wind energy[J]. CSEE Journal of Power and Energy Systems, 2021, 7(5): 954-975.

ZHANG Yunqi, WANG Congbo, YU Yue. A pilot protection method based on the similarity of initial current traveling wave time-frequency matrix for VSC-HVDC grids[J]. Electric Power Systems Research, 2022, 217.

LIANG Yingyu, REN Yi, ZHANG Zhi. Pilot protection based on two-dimensional space projection of dual differential currents for lines connecting MMC-HVDC station[J]. IEEE Transactions on Industrial Electronics, 2023, 70(5): 4356-4368.

HU Zepeng, LI Bin, ZHENG Yuping, et al. Fast distance protection scheme for wind farm transmission lines considering R-L and Bergeron models[J]. Journal of Modern Power Systems and Clean Energy, 2023, 11(3): 840-852.

YANG Zhe, LIAO Wenlong, WANG Hongyi, et al. Improved Euclidean distance based pilot protection for lines with renewable energy sources[J]. IEEE Transactions on Industrial Informatics, 2022, 12(18): 8551-8562.

ZHANG T, YAO J, LIN Y, et al. Impact of control interaction of wind farm with MMC-HVDC transmission system on distance protection adaptability under symmetric fault[J]. Protection and Control of Modern Power Systems, 2025, 10(2): 83-101.

YANG J, FLETCHER J, O’REILLY J G, et al. Protection scheme design for meshed VSC-HVDC transmission systems of large-scale wind farms[C] // 9th IET International Conference on AC and DC Power Transmission (ACDC 2010), October 19-21, 2010, London, UK: 194-198.

YANG Zhe, ZHU Ruijin, LIAO Wenlong. Minkowski distance based pilot protection for tie lines between offshore wind farms and MMC[J]. IEEE Transactions on Industrial Informatics, 2024, 20(6): 8441-8452.

HOU Junjie, GAO Qiangqiang, FAN Yanfang, et al. Improved differential protection for two-terminal weak feed AC system considering negative sequence control coordination strategy[J]. International Journal of Electrical Power Energy Systems, 2022, 164.

TU Qingrui, LIU Wei, JIANG Jiaheng, et al. A time domain pilot protection based on module identification for M3C-based fractional frequency offshore wind power system[C] // 2022 IEEE International Conference on Power Systems Technology, September 12-14, 2022, Kuala Lumpur, Malaysia: 213-218.

GAO Xiaoping, SONG Guobing, ZHANG Chenhao, et al. A novel directional pilot protection of submarine cables for low frequency transmission system with offshore wind power[J]. IEEE Transactions on Power Delivery, 2025, 40(1): 273-286.

吴百诗. 大学物理: 下册[M]. 西安: 西安交通大学出版社, 2009.

LIANG Yingyu, PAN Cunyue. Time-domain differential protection based on operating and restraining trajectory indices for lines connecting battery storage energy stations[J]. Journal of Modern Power Systems and Clean Energy, 2024, 12(4): 1074-1086.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

基于主动探测式的双端弱馈交流系统模型识别纵联保护

基于多模态分解信息的新能源场站送出线路纵联保护新判据

基于固有频率的海上风电接入柔直系统的交流送出线路纵联保护原理

基于近似熵变化量判据的混合直流输电系统纵联保护方案

基于故障分量时频突变特征的海上风电直流升压送出线路纵联保护