基于电压数据补充的柔性直流输电线路自适应行波保护方法

刘瑞阔; 姚昆鹏; 邹祖冰; 孙勇; 吴海飞; 贾科

doi:10.19725/j.cnki.1007-2322.2023.0303

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基于电压数据补充的柔性直流输电线路自适应行波保护方法

智能电网 | 更新时间：2025-12-11

- 基于电压数据补充的柔性直流输电线路自适应行波保护方法
- An Adaptive Traveling Wave Protection Method for Flexible DC Transmission Lines Based on Supplement of Voltage Data
- 现代电力 2025年第6期页码：1162-1169
- 作者机构：
  
  1. 中国长江三峡集团有限公司科学技术研究院, 北京市海淀区,100038
  2. 新能源电力系统国家重点实验室(华北电力大学), 北京市昌平区,102206
  3. 三峡陆上新能源投资有限公司, 内蒙古自治区,呼和浩特市,010000
- 作者简介：
  
  [ "刘瑞阔(1986)，男，工程师，研究方向为新能源并网控制，E-mail：liu_ruikuo@ctg.com.cn" ]
  [ "姚昆鹏(1999)，男，硕士研究生，研究方向为新能源直流输出线路保护，E-mail：1362965335@qq.com" ]
  [ "邹祖冰(1987)，男，教授级高级工程师，研究方向为新能源并网控制，E-mail：zou_zubing@ctg.com.cn" ]
  [ "孙勇(1982)，男，高级工程师，研究方向为新能源主动支撑技术，E-mail：sun_yong2@ctg.com.cn" ]
  [ "吴海飞(1987)，男，工程师，研究方向为故障诊断技术，E-mail：wu_haifei@ctg.com.cn" ]
  [ "贾科(1986)，男，通信作者，博士，教授，博士生导师，研究方向为电力系统保护与控制、新型配电网保护与故障定位，E-mail：ke.jia@ncepu.edu.cn" ]
- 基金信息：
  
  中国长江三峡集团有限公司科研项目资助(202103368)。
- DOI：10.19725/j.cnki.1007-2322.2023.0303
  中图分类号：
- 纸质出版：2025
- 稿件说明：
移动端阅览
刘瑞阔, 姚昆鹏, 邹祖冰, 等. 基于电压数据补充的柔性直流输电线路自适应行波保护方法[J]. 现代电力, 2025,(6):1162-1169.

LIU Ruikuo, YAO Kunpeng, ZOU Zubing, et al. An Adaptive Traveling Wave Protection Method for Flexible DC Transmission Lines Based on Supplement of Voltage Data[J]. 2025, (6): 1162-1169.
刘瑞阔, 姚昆鹏, 邹祖冰, 等. 基于电压数据补充的柔性直流输电线路自适应行波保护方法[J]. 现代电力, 2025,(6):1162-1169. DOI： 10.19725/j.cnki.1007-2322.2023.0303.

LIU Ruikuo, YAO Kunpeng, ZOU Zubing, et al. An Adaptive Traveling Wave Protection Method for Flexible DC Transmission Lines Based on Supplement of Voltage Data[J]. 2025, (6): 1162-1169. DOI： 10.19725/j.cnki.1007-2322.2023.0303.

摘要

缩短采样步长是提高突变量行波保护灵敏度的关键，然而较高的采样频率工程难以实现，保护性能受到制约。为此文中从柔直线路边界处电气量关系出发，利用拉格朗日中值定理，实现电压行波数据的补充，等效提高了采样频率。此外，线路故障时故障电流变化量与过渡电阻呈负相关关系，因此可根据故障电流变化量构建自适应保护阈值。结合上述内容，提出一种基于电压数据补充的柔直线路自适应行波保护方法。硬件在环的测试结果表明，所提保护在10kHz的采样频率下可有效识别区内外故障并具有较高的灵敏度，保护的可行性得到了有效地验证。

Abstract

The key to enhancing the sensitivity of derivative-based traveling wave protection lies in shortening the sampling step. However

achieving a higher sampling frequency poses challenges to engineers and imposes limitations on the protection performance. For this reason

in this paper we start from the relationship between the electrical quantities at the boundary of the flexible straight line

and utilize the Lagrange median theorem to realize the complement of voltage traveling wave data

thereby increasing the sampling frequency. In addition

the amount of fault current change during line fault is negatively correlated with the transition resistance

so the adaptive protection threshold can be constructed based on the supplement of the voltage data. Combined with the above

in this paper we propose an adaptive traveling wave protection method for flexible DC lines based on the supplement of the voltage data. The hardware-in-the-loop test results indicate that the proposed protection can effectively identify faults inside and outside the zone with high sensitivity at a sampling frequency of 10 kHz

and the feasibility of the protection is verified.

关键词

Keywords

references

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