湖南电力 ›› 2026, Vol. 46 ›› Issue (1): 40-46.doi: 10.3969/j.issn.1008-0198.2026.01.005

• 电网运行与控制 • 上一篇    下一篇

基于时域电压推算比较的风电场送出线路保护新算法

李煜1, 李志为1, 刘鸿基2, 肖成东1, 王勇1, 谭力铭2   

  1. 1.国网湖南省电力有限公司郴州供电分公司,湖南 郴州 423000;
    2.国网湖南省电力有限公司电力科学研究院,湖南 长沙 410208
  • 收稿日期:2025-11-03 修回日期:2025-11-20 出版日期:2026-02-25 发布日期:2026-03-10
  • 通信作者: 李煜(1997),女,大学本科,工程师,研究方向为电力系统继电保护。
  • 基金资助:
    国网湖南省电力有限公司科技项目(5216A524005)

Protection Algorithm for Wind Farm Outgoing Lines Based on Time-Domain Voltage Calculation and Comparison

LI Yu1, LI Zhiwei1, LIU Hongji2, XIAO Chengdong1, WANG Yong1, TAN Liming2   

  1. 1. Chenzhou Power Supply Branch of State Grid Hunan Power Co., Ltd., Chenzhou 423000, China;
    2. State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410208, China
  • Received:2025-11-03 Revised:2025-11-20 Online:2026-02-25 Published:2026-03-10

摘要: 针对大规模风电接入电力系统后,传统线路保护算法难以适配系统特性变化的问题,提出一种基于时域电压推算比较的风电场送出线路保护方法。首先,基于电阻电感模型(resistor inductor based model,RL模型)构建线路电压的时域推算模型,分别求解线路中特征点的电压值。随后通过对两点电压推算结果的波形进行相关性分析,实现故障的精准识别。本文方法采用时域全量分析思路,可有效克服风电系统中撬棒动作、过渡电阻影响及风电场弱馈等特殊工况带来的干扰。为验证算法的性能,在RSCAD仿真平台搭建双馈风电场并网模型开展仿真分析,结果表明所提保护方法能够准确识别故障,验证了其有效性与适应性。

关键词: 风电场, 电压波形, 时域, 电压推算

Abstract: To address the issue that traditional line protection algorithms are difficult to adapt to changes in system characteristics after large-scale wind power integration into the power system, a protection method for wind farm outgoing lines based on time-domain voltage calculation and comparison is proposed. First, a time-domain calculation model of line voltage is constructed based on the resistor inductor based model, and the voltage values of characteristic points in the line are respectively solved. Then, through the correlation analysis of the waveform of the voltage calculation results at two points, the fault can be accurately identified. Adopting the time-domain full-scale analysis approach, this method can effectively overcome interference caused by special operating conditions in wind power systems, such as crowbar activation, the influence of transition resistance, and weak feed-in from wind farms. To verify its performance, a doubly-fed induction generator(DFIG) wind farm grid-connected model is built on the RSCAD simulation platform for simulation analysis. The results show that the proposed protection method can accurately identify faults, verifying its effectiveness and adaptability.

Key words: wind farm, voltage waveform, time-domain, voltage calculation

中图分类号: