扁旭涛
[摘 要]为了加强电能质量,缓解电力部门供电压力,必须注重电网更新与升级。因受到资金、电力技术、设备机械的影响,导致地区配电线路无法有效处理。在线路运行期间,极易出现单相接地故障,若不注重故障处理,将会造成严重后果。此次研究主要是分析10 kV线路单相接地故障问题,分析故障的判断方法,同时制定故障处理措施,以维护电网线路运行效益。
[关键词]10 kV线路;单相接地故障;分析判断;处理方法
[中图分类号]TM863 [文献标志码]A [文章编号]2095–6487(2021)01–00–02
Analysis Judgment and Treatment of 10 kV Line Single Phase Grounding Fault
Bian Xu-tao
[Abstract]In order to strengthen the power quality and relieve the power supply pressure of the power sector, we must pay attention to the updating and upgrading of the power grid. Due to the influence of capital, power technology, equipment and machinery, the regional distribution lines can not be effectively handled. During the operation of the line, single-phase ground fault is easy to occur, if we do not pay attention to fault treatment, it will cause serious consequences. This research mainly discusses and analyzes the single-phase grounding fault of 10 kV Transmission line, puts forward the fault analysis and judgment method, and formulates the fault treatment measures, so as to maintain the operation benefit of power grid line.
[Keywords]10 kV transmission line; single phase grounding fault; analysis and judgment; treatment method
电网工程改造,有助于缓解电力不足问题。然而我国多数地区应用小电流接地方式,因电力系统不完整,极易出现单相接地故障,不仅无法提升供电效率,还会对电力系统稳定性造成影响,缩短设备的使用寿命。所以,深入分析和掌握单相接地故障,采取科学措施预防,可有效维护电力企业的生产效益。
1 10 kV线路单相接地故障的探究价值
通过分析10 kV线路的运行状态可知,配电线路沿电线路长,且电气设备较多,线路沿途分布大量树木和建筑,相应增加了线路单相接地故障概率。此外,10 kV线路采用小电流接地系统,发生单相接地故障后,极易出现不跳闸问题,影响电网运行安全性。在近几年发展中,社会生产与生活对电力资源需求度持续提升,电力电网也出现了较多中压配电线路。中压配电线路运行时,易出现单相接地故障,使电网接地电容电流超标。然而电力电网运行过程中,单相接地故障频发,接地电弧无法自熄,电力系统中出现高倍数弧光接地过电压,会严重威胁电力电网运行,还会增加电力电网安全隐患。……