Determination of the optimum routine maintenance intervals for protective systems

Author

Wang, Longjun ; Wang, Gang ; Sun, Zhibin

Author_Institution

South China Univ. of Technol., Guangzhou, China

fYear

2009

Firstpage

1

Lastpage

5

Abstract

Reasonable preventive maintenance mechanism can effectively improve the reliability of protective systems. According to the research on the reliability and economic, this study advanced a quantitative evaluation reliability model of protective systems based on semi-Markov process, and defined the annual average economic losses of protective systems. Therefore, the optimum maintenance interval was derived by minimizing the annual average economic losses. Through sensitivity analysis, this paper discussed the effect of the failure rate of the protection and the corresponding component protected, and self-checking effective rate on the optimum maintenance interval. The theoretical foundation has been established to determine the optimum routine maintenance intervals for protective systems.

Keywords

Markov processes; failure analysis; power system economics; power system protection; power system reliability; preventive maintenance; economic losses; failure rate effect; optimum routine maintenance interval; preventive maintenance mechanism; protective system reliability; quantitative evaluation reliability model; semiMarkov process; sensitivity analysis; Automatic testing; Digital relays; Distribution functions; Inspection; Maintenance; Power generation economics; Power system protection; Power system reliability; Protective relaying; Sun; economic losses; optimum routine maintenance interval; protective system; reliability; semi-Markov process;

fLanguage

English

Publisher

ieee

Conference_Titel

Power & Energy Society General Meeting, 2009. PES '09. IEEE

Conference_Location

Calgary, AB

ISSN

1944-9925

Print_ISBN

978-1-4244-4241-6

Type

conf

DOI

10.1109/PES.2009.5275973

Filename

5275973