Saifi and Saidi Indicative Reliability Figures of Rural Electric Networks With Smart Island Reclosers

Abstract

The paper describes principles of improving the reliability of rural distribution networks of 6–35 kV based on smart switching devices, reclosers with specialized integrated controllers. The typical places to install reclosers for the radial and ring feeders are shown. They are mounted when a new consumer is connected and balance membership is delimited. It is also done to identify a responsible consumer with an indicated connection diagrams. The choice of the optimal number of reclosers for the radial and ring feeders according to indicative figures RNRE and ARAE, characterizing the relative efficiency of network reconstruction by reducing the number of consumer outages per year, and the average investment efficiency in network reconstruction when installing reclosers, is justified. There is presented a method to find SAIFI and SAIDI indicative reliability figures that characterize the average annual number of customer disconnections and the average annual duration of one disconnection in the electrical network.

Recloser-Based Decentralized Control of the Grid with Distributed Generation in the Lahsh District of the Rasht Grid in Tajikistan, Central Asia

“…Reliability indices of the grid under consideration were calculated. Andrianova et al [24] analyzed the use of reclosers in 6-35 kV rural distribution grids for decentralized control. Reliability indices such as SAIFI (System Average Interruption Frequency Index) and SAIDI (System Average Interruption Duration Index), as well as power supply quality indices, were calculated before and after installation of reclosers.…”