Voltage Characteristic Analysis of UHV Half-wavelength AC Transmission System

TIAN Hao; LIU Yutian; YANG Dong; QIN Xiaohui

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Voltage Characteristic Analysis of UHV Half-wavelength AC Transmission System

更新时间：2025-12-08

- Voltage Characteristic Analysis of UHV Half-wavelength AC Transmission System
- Vol. 44, Issue 1, Pages: 83-89(2018)
- 作者机构：
  
  1. 山东大学电网智能化调度与控制教育部重点实验室
  2. 国网山东省电力公司电力科学研究院
  3. 中国电力科学研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 January 2018，
  
  Published：2018
- 稿件说明：
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TIAN Hao, LIU Yutian, YANG Dong, et al. Voltage Characteristic Analysis of UHV Half-wavelength AC Transmission System[J]. 2018, 44(1): 83-89.
DOI：

TIAN Hao, LIU Yutian, YANG Dong, et al. Voltage Characteristic Analysis of UHV Half-wavelength AC Transmission System[J]. 2018, 44(1): 83-89. DOI：

摘要

针对特高压半波长交流输电系统在电压特性机理分析的不足

对其稳态电压及故障电压特性进行详细解释说明。首先基于分布参数模型计算分析了线路稳态电压特性及其影响因素

推导了半波长线路沿线充电功率及无功损耗分布规律

并求解出沿线最高电压及其位置。然后利用线路故障等值电路分析了故障类型及系统强度变化对线路沿线故障电压的影响

解释了在满足串联谐振条件的位置发生短路故障对系统造成严重冲击的机理。最后

利用实际电网仿真分析表明:线路重载或低功率因数运行易出现局部过电压

距离端点100

00 km区域发生故障可能引发串联谐振而产生过电压

仿真结果验证了前述分析的正确性。

Abstract

Aiming at the shortcomings of the analysis of voltage characteristic mechanism of UHV half-wavelength AC transmission system

we explained the steady-state voltage and fault voltage characteristics in detail.Moreover

we analyzed the steady-state voltage characteristics of half-wavelength lines and their influencing factors based on the distributed parameter model.Distribution characteristics of charging power and reactive power loss along half-wavelength line were deduced and the maximum voltage and its position were solved.Then

based on the fault equivalent circuit

fault voltage characteristics along half-wavelength line influenced by different fault types and system strengths were analyzed

and the mechanism of severe faults due to series resonance was explained.The simulation results based on a real power system show that overload and low power factor lead to overvoltage under a steady state

and series resonance overvoltage occurs under faults in 100

00 km ranges away from terminals

verifying the correctness of the foregoing analysis.

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Related Institution

Electric Power Research Institute, State Grid Liaoning Electric Power Company

Maintenance and Test Center of Ultra High Voltage Company of South Grid

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Research Group of Biophysics and Medical Engineering, Zhejiang Provincial Key Laboratory of Bioelectromagnetics,School of Medicine, Zhejiang University

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