摘要
通过综合考虑不同中性点接地方式下发生单相接地故障时线路跳闸的原因,建立了不同中性点接地方式下线路故障可靠性概率模型;然后,根据三种典型的配电网网架结构的特点,考虑网架结构的不同会对用户供电产生的影响;最后,建立综合考虑中性点接地方式和网架结构的配电网可靠性评估模型,以树干式和环式配电网为例,进行计算,得出两种典型的配电网接线在不同的中性点接地方式下的供电可靠性,同时客观评价了两种中性点接地方式下配电网供电可靠性水平。
In this paper,the reliability probability model of line fault under different neutral grounding modes is established by synthetically considering the causes of single phase line tripping under different neutral grounding modes.According to the characteristics of three typical distribution network structures,considering the influence of different grid structures on the power supply to users,the reliability evaluation model of distribution network considering the neutral grounding mode and the grid structure is established.Taking trunk type and ring type distribution network as examples,the power supply reliability evolution model of two typical distribution network connections under different neutral grounding modes is obtained through calculation,and power supply reliability level of the distribution network under two neutral grounding modes are objectively evaluated.
作者
赵旭阳
王聪
牛胜锁
刘国平
赵杰
Zhao Xuyang;Wang Cong;Niu Shengsuo;Liu Guoping;Zhao Jie(Department of Electrical Engineering,North China Electric Power University,Baoding 071003,Hebei,China;Shijiazhuang Power Supply Branch of State Grid Hebei Electric Power Company,Shijiazhuang 050000,China)
出处
《电测与仪表》
北大核心
2019年第18期49-56,共8页
Electrical Measurement & Instrumentation
关键词
中性点接地方式
单相接地故障
跳闸率模型
网架结构
可靠性评估
neutral grounding mode
single phase grounding fault
tripping rate model
grid structure
reliability evaluation
