Your Cart

Your cart is empty

Home  >  Transactions ... 2019)

15. RELIABILITY ASSESSMENT OF A POWER DISTRIBUTION NETWORK: A CASE STUDY by EgwaileJ. O. and Oyedoh M.O. Transactions of NAMP Volume 10, (July and November, 2019), pp109 – 118
Sale price: $5.00
Quantity:

RELIABILITY ASSESSMENT OF A POWER DISTRIBUTION NETWORK: A CASE STUDY by EgwaileJ. O. and Oyedoh M.O. Transactions of NAMP Volume 10, (July and November, 2019), pp109 – 118

Department of Electrical and Electronic Engineering, University of Benin,P.M.B. 1154, Benin City, Edo State, Nigeria.

Abstract

Every power consumer deserves a good and regular power supply from his service provider, and the quality of service depends on the degree of reliability of the power distribution system. The key factors that determine the reliability of the system are the frequency and duration of fault in the system. Therefore, this research seek to ascertain the level of reliability of electric power distribution network, using the GRA 33/11kVfeeder as case study for the year 2017. This research is unique because it took into consideration the estimated hours of scheduled load shedding in the distribution network. The feeder radiates Dumez, Ihama, Reservation, Oba Palace and GRA 11kV feeders in the network of Benin Electricity Distribution Company (BEDC). A monthly record of both scheduled (load shedding) and unscheduled frequency of interruption, duration of interruption and number of customers on each 11kV feeder were takenfrom the control room for the year under review. Using the basic mathematical tool, the customer service and basic reliability indices were studied for each month after which an average of each element was used for the analysis. Result showed that duration of interruption has a strong impact on the service customer reliability indices. The entire indices also show that Reservation 11kV feeder was worst hit as it had a failure rate of 0.2001 per hour in the year 2017, it also recorded the highest average fault frequency and duration of 145.83 and 469.47hrs respectively which consequently had direct impact on the entire indices. In comparison with international benchmark of 0.9998 for Average Service Availability Index (ASAI), it was observed that the 11kV feeders under study were grossly unreliable as Ihama feeder with the best reliability recorded 0.4634 as ASAI. With transient fault and failure of system components the major causes of failure, a massive overhaul of power system components and smart grid system should be implemented in the networks.

Keywords: Reliability, 11kV Feeders, SAIDI, SAIFI, Load Shedding, ASAI

Close
Loading...