A Pilot Protection Scheme for Transmission Lines Based on the Time Domain Mutation Characteristics of Transient Current

WANG Bingran; WANG Zengping; WANG Tong; LÜ Zhe

doi:10.13335/j.1000-3673.pst.2024.1329

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A Pilot Protection Scheme for Transmission Lines Based on the Time Domain Mutation Characteristics of Transient Current

更新时间：2026-03-13

- A Pilot Protection Scheme for Transmission Lines Based on the Time Domain Mutation Characteristics of Transient Current
- Vol. 49, Issue 11, Pages: 4821-4831(2025)
- 作者机构：
  
  新能源电力系统全国重点实验室(华北电力大学), 北京市昌平区,102206
- 作者简介：
- 基金信息：
- DOI：10.13335/j.1000-3673.pst.2024.1329
  CLC： TM773
- Published：2025
- 稿件说明：
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WANG Bingran, WANG Zengping, WANG Tong, et al. A Pilot Protection Scheme for Transmission Lines Based on the Time Domain Mutation Characteristics of Transient Current[J]. 2025, 49(11): 4821-4831.
DOI：

WANG Bingran, WANG Zengping, WANG Tong, et al. A Pilot Protection Scheme for Transmission Lines Based on the Time Domain Mutation Characteristics of Transient Current[J]. 2025, 49(11): 4821-4831. DOI： 10.13335/j.1000-3673.pst.2024.1329.

摘要

充分挖掘故障暂态特征是提升新型电力系统保护性能的重要手段，然而现有暂态量保护方法在实际应用中仍面临动作门槛值整定困难、算法计算量较大等挑战。针对上述问题，提出了一种利用暂态电流时域突变特征的输电线路纵联保护方案。首先，分析了母线各出线故障暂态电流在时域突变特征上的相对关系，据此提出了不依赖于定值整定的故障正方向判别方法；其次，研究表明交叉重叠差分变换能够很好的放大高频突变差异，滤除低频近似特征，变换后的电流幅值相对关系明显，运算简单符合暂态量保护快速计算的要求，基于此提出了一种暂态方向纵联保护方案；最后，分别基于PSCAD仿真试验与硬件试验进行了验证，该方案在不同的输电线路中均具有较好的普适性，具备较好的工程实用价值。

Abstract

Fully extracting fault transient characteristics is crucial for enhancing the protection of renewable power systems. However

existing methods face challenges in setting action thresholds and computational demands. This paper proposes a pilot protection scheme for transmission lines using transient current time-domain mutations. First

the relative time-domain mutation characteristics of fault transient currents in bus outgoing lines are analyzed

leading to a method for determining the fault forward direction without fixed settings. Second

the sequential overlapping derivative transform amplifies high-frequency mutation differences and filters out low-frequency characteristics

simplifying calculations. Based on this

a transient directional pilot protection scheme is proposed. Finally

the scheme's feasibility is verified through PSCAD simulations and hardware tests

showing good applicability and practical engineering value across various transmission lines.

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