超高压输电线路雷击干扰分析与识别研究
| 作 者：周桂珍 |
| 单 位：湘南学院电子信息与电气工程学院 |
| 基金项目：2021年湘南学院大学生创新创业训练计划项目 |
| 摘 要： |
| 超高压输电线路长度跨度大，所处地理环境和气候条件复杂，导致超高压输电线路遭受雷击的概率大，因此雷击成为影响超高压输电线路暂态保护不可或缺的研究因素。本文通过对故障性雷击、非故障性雷击，以及单相接地短路故障相关暂态过程进行研究和分析，利用相模变换的克拉克公式来提取出三者的正反行波，通过小波变换提取行波的低频分量，依据行波极性、斜率等性质的不同，设计了一种能识别超高压线路是遭受雷击还是发生短路故障的识别方案。通过对超高压输电线路雷击干扰及其短路故障进行仿真建模，仿真结果验证了雷击干扰识别方案的可行性。 |
| 关键词：超高压输电线路；暂态保护；雷击干扰识别；小波分析; |
Analysis and Identification of Lightning Interference on EHV Transmission Lines
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| Abstract: |
| The length and span of EHV transmission lines are large, and the geographical environment and climatic conditions are complex, resulting in a high probability of lightning strikes on EHV transmission lines. Therefore, lightning strikes become an indispensable research factor affecting the transient protection of EHV transmission lines. This paper studies and analyzes the transient processes related to fault lightning strikes, non fault lightning strikes, and single-phase to ground short circuit faults, extracts the forward and inverse traveling waves of the three using the Clark formula of phase modulus transformation, extracts the low-frequency components of the traveling waves through wavelet transform, and designs a recognition scheme that can identify whether the EHV line is struck by lightning or has a short circuit fault based on the differences in the polarity, slope, and other properties of the traveling waves. Through the simulation modeling of lightning interference and short circuit fault of EHV transmission line, the simulation results verify the feasibility of lightning interference identification scheme. |
| Keywords: UHV transmission line; transient protection; lightning interference identification; wavelet analysis |
| 投稿时间：2023-03-25 |
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