Alteration from Radial to Ring Power Distribution to Improve System Reliability: A Case Study
Herry Winandi (a*), Budi Sudiarto (b*)

a) Electrical Engineering Department, Universitas Indonesia
Depok, Indonesia
*herry.winandi81[at]ui.ac.id
b) Electrical Engineering Department, Universitas Indonesia
Depok, Indonesia
*budi.sudiarto[at]ui.ac.id

Abstract

Outage of power system supplying oil and gas production facilities causes hundreds of barrel of oil equivalent loss per hour. Hence, there is a need to improve the supply continuity by e.g. altering the power distribution configuration from radial to ring. However, switching to ring configuration demands adjustment related to system capability in delivering higher current, taking longer route, or handling higher fault current. This study develops an approach to assess those requirements and benefits. The evaluation includes load flow, short circuit, protection relay coordination, and reliability analysis. This study aims to evaluate the existing system capability in applying ring configuration and recommend any required adjustment. This study also intends to estimate the reduction of outage duration. Overall, the existing radial power distribution system can be switched to ring configuration with several adjustments. The ring application offers 43.07 percent annual outage reduction from 17.322 to 9.861 hours annually.

Keywords: Power distribution topology, load flow, short circuit, protection relay coordination, reliability

Topic: Electrical Engineering