Research on Switching Overvoltage Characteristics of 330 kV Overhead Line-cable Hybrid Lines

WANG Hanfeng; SUN Haofei; WANG Chong; SU Fengfei; TAN Zhen; GAO Kun

doi:10.13296/j.1001-1609.hva.2026.08.017

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Research on Switching Overvoltage Characteristics of 330 kV Overhead Line-cable Hybrid Lines

Research & Analysis | 更新时间：2026-08-12

- Research on Switching Overvoltage Characteristics of 330 kV Overhead Line-cable Hybrid Lines
- High Voltage Apparatus Vol. 62, Issue 8, Pages: 132-143(2026)
- 作者机构：
  
  国网陕西省电力有限公司西安供电公司，西安 710030
  国网陕西省电力有限公司电力科学研究院，西安 710199
  国网陕西省电力有限公司，西安 710048
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.08.017
  CLC：
- Received：19 February 2026，
  
  Revised：2026-05-21，
  
  Published：16 August 2026
- 稿件说明：
移动端阅览
WANG Hanfeng, SUN Haofei, WANG Chong, et al. Research on Switching Overvoltage Characteristics of 330 kV Overhead Line-cable Hybrid Lines[J]. High Voltage Apparatus, 2026, 62(8): 132-143.
DOI：

WANG Hanfeng, SUN Haofei, WANG Chong, et al. Research on Switching Overvoltage Characteristics of 330 kV Overhead Line-cable Hybrid Lines[J]. High Voltage Apparatus, 2026, 62(8): 132-143. DOI： 10.13296/j.1001-1609.hva.2026.08.017.

摘要

与传统纯架空线路相比，架空—电缆线操作过电压具有更复杂的谐波频率和传播特性，因此深入开展架空—电缆线操作过电压特性分析对电力系统绝缘设计而言具有重要意义。文中以西北某330 kV电压等级的架空—电缆混合线路为例，对该线路开关的合闸和分闸操作产生的过电压特征开展研究。首先根据混合线路结构特点建立了含有高抗站和不含高抗站两种典型的混合线路模型，模拟该线路在同期合闸、不同期合闸、重合闸以及分闸不同工况下的仿真。仿真结果表明：①在含有高抗的输电线路上，线路分闸时过电压波形会出现拍频效应，拍频频率为正弦波59.3、80.9、81.3 Hz的组合。②三相重合闸产生的过电压幅值最大，最极端条件下，幅值较无残压合闸过电压升幅33.2%。有高抗站线路分闸时拍频电压幅值高于无高抗站分闸过电压。③过电压随着架空线距离增加先增大再减小，电缆线过电压随电缆线距离增大而增大。④对同期合闸和分闸过电压做频谱分析，合闸过电压架空线谐波频率主要在100 Hz内变化，主导频率为2 807 Hz，电缆线谐波频率主要在100～500 Hz内变化，主导频率为430 Hz。

Abstract

Compared with the traditional pure overhead lines

switching voltages in overhead line-cable hybrid lines exhibit more complex harmonic frequency and propagation characteristics.Therefore

in-depth analysis of switching overvoltage characteristics in overhead-cable hybrid lines is of great significance for the insulation design of power systems. In this paper a 330 kV overhead-cable hybrid line in Northwest China is taken as an example to study the characteristics of overvoltage generated by the switching operation of the line. First

two typical hybrid line models with and without high resistance(reactor)stations are set up in accordance with the structure characteristics of the hybrid line

and the simulation of the line under such different conditions as synchronous closing

unsynchronous closing

reclosing and opening operation is performed. The simulation results show that ①In the transmission line with high resistance

the overvoltage waveform will appear beat frequency effect in case of opening operation

and the beat frequency is the combination of sine wave 59.3 Hz

80.9 Hz and 81.3 Hz.②The amplitude of overvoltage generated by three-phase reclosing is the largest.Under the most extreme conditions

the amplitude is 33.2% higher than that of no residual closing overvoltage. The beat freqency voltage amplitude during line opening on lines with high voltage reactor station is higher than that during line opening on lines without high-voltage reactor stations.③Overvoltage firstly increases and then decreases with the increase of overhead line distance

and cable overvoltage increases with the increase of cable line distance.④The frequency spectrum analysis of the synchronous closing and opening overvoltage shows that the harmonic frequency of the overhead line of the closing overvoltage mainly changes within 100 Hz

and the dominant frequency is 2807 Hz. The harmonic frequency of the cable line mainly changes within 100~500 Hz

and the dominant frequency is 430 Hz.

关键词

Keywords

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