配网接线方式对供电可靠性影响分析

Influence of Distribution System Connection Modes on Power Supply Reliability

不同配网接线方式对供电可靠性影响不同,它们在环网率和原件故障率上影响可靠性。为此,介绍了可靠性分析的一种解析方法:网络等值法,并给出相关等效公式。在Billinton基础参数源的基础上,结合广东某地区的设备运行参数计算出适合当地情况的一套基础参数,在此参数基础上定量分析该地区的单辐射、单联络和分段两联络三种典型接线方式对可靠性的影响。分析结果表明,环网率越高,供电可靠性也相对较高,但环网率过高,供电可靠性也因开关设备数量增加而受影响。

The influence of connection modes on power supply reliability is different.They may effect the reliability on the rate of loop network and fault rate.This paper introduces reliability-network-equivalent algorithm which is one of the analytical analysis methods,and lists out the equivalent formulas.Based on the basic parameters of R.Billinton＇s and equipment operation parameters of a cirtein area of Guangdong a set of adaptive basic parameters is calculated.On this basis,the reliability of three typical connection modes is analyzed,which are single radial network,single connection network and sectioned and two-linked network.The results show that the rate of loop network is higher,the reliability is higher,meanwhile the reliability is also influenced by the mount of the switchgear equipment.