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不接地系统单相断线故障负序电流分析

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配电网架空线发生单相断线故障后,部分负荷电流缺失,易被忽视.通过建立配电网断线故障电磁暂态仿真模型,分析发生单相断线故障后线路电压电流变化特征,提出了一种基于负序电流的配电网单相断线故障分析方法.仿真结果表明,提出的单相断线故障分析特征量具有良好的可靠性和灵敏度.
Negative Sequence Current Analysis of Single-phase Disconnection Fault in Ungrounded System
It is easily ignored that part of load current will be lost after an overhead line of distribution network encounters a single-phase disconnection fault.By establishing an electromagnetic transient simulation model for distribution network disconnection faults and analyzing the characteristics of line voltage and current changes after the occurrence of single-phase disconnection faults,a new method for analyzing single-phase disconnection faults in distribution networks based on negative sequence current is proposed.The simulation results show that the adoption of the proposed method in analyzing feature quantities for single-phase broken line fault can achieve good reliability and sensitivity.

distribution networksingle-phase disconnection faultnegative sequence current

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中铁第一勘察设计院集团有限公司,陕西 西安 710043

配电网 单相断线故障 负序电流

2024

电工技术
重庆西南信息有限公司(原科技部西南信息中心)

电工技术

影响因子:0.177
ISSN:1002-1388
年,卷(期):2024.(9)
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