Novel technique of ranking of transmission lines for maintenance prioritization accounting annual outage time and operational severities
- Vol.104(6), Dec
- USA Springer 2023
- 1185-1196p.
This paper describes a novel index for ranking of transmission lines for maintenance purpose. Preventive maintenance of transmission lines may be carried out based on prioritization of lines index. The index is based on severity indices, namely (a) thermal limits, (b) voltage limit violation, (c) voltage stability margin and (d) annual outage time. Thus in maintenance prioritization of lines, annual outage time (reliability index) and operational severity have been considered. The index has been obtained by multiplying the operational severity index with the annual outage time to reflect the true picture for the prioritization of transmission lines for maintenance purposes. It is stressed here that the objective of the paper is to provide an assessment of transmission line outage severity so as to provide a ranking list of lines based on peak load for maintenance prioritization. Lines that have higher index can be selected in priority for maintenance from the list. Maintenance activities involve reduction in failure rate and average repair time thereby giving desired availability. Results have been obtained for determining the maintenance priorities of transmission lines using derived index on three standard test systems.