基于电弧外特性的故障定位信号发生器优化设计

LIU Longhua

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基于电弧外特性的故障定位信号发生器优化设计

更新时间：2025-08-13

- 基于电弧外特性的故障定位信号发生器优化设计
- Automation of Electric Power Systems Vol. 40, Issue 9, Pages: 100-105(2016)
- 作者机构：
  
  广西电网有限责任公司河池供电局, 广西壮族自治区河池市,547000
- 作者简介：
- 基金信息：
- DOI：
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- Published：2016
- 稿件说明：
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LIU Longhua. [J]. Automation of electric power systems, 2016, 40(9): 100-105.
DOI：

LIU Longhua. [J]. Automation of electric power systems, 2016, 40(9): 100-105. DOI：

摘要

配电网的复杂性导致其故障测距精度不高。停电检修时

在线测距和定位方法无用武之地。由于离线式故障定位信号发生器实现难度大

离线故障定位技术也未获得广泛应用。文中分析了弧光接地故障的伏安特性

提出了双信号发生器并联轮换的设计方案:高压小电流信号发生器用于产生高电压

重新击穿故障点;低压大电流信号发生器提供大电流维持故障状态稳定。给出了双信号发生器功率容量优化设计方法

分析了信号发生器切换及工作过程。优化的双信号发生器总功率容量不足单信号发生器功率容量的1/10。理论分析和现场实验证实了方案的可行性。

Abstract

Owing to the complexity of the distribution network

the accuracy of its fault location is not high. All on-line distance measurement and fault location methods become useless during a power line outage. The off-line fault location technology is also not widely used for the realization difficulty of the off-line fault location signal generator. This paper analyzes the vol-tampere characteristics of arc grounding fault

and then proposes a design scheme for two parallel signal generators working in rotation. In the scheme

the smaller generator provides high voltage but less current to re-breakdown the fault point. After breakdown

the other one provides high current but less voltage to keep the fault current stable. An optimization design method of minimizing the power capacity of the two fault location signal generators is proposed. The total power capacity of the optimized dual generator is less than one-tenth of the single generator's. The feasibility of the design scheme is verified by theoretical analysis and experimental results. This work is supported by China Southern Power Grid Co. Ltd. (No. K-GX2014-047).

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