Shorting-time transmission line maintenance scheduling method based on Credibility Theory

Scheduling transmission line maintenance is important to the operation of power system. Traditionally, transmission line maintenance scheduling formulated as a stochastic programming problem, which cannot express operation risk accurately. In terms of Short-term transmission line maintenance scheduling, line forced outage rate is based on (100km·year)-1. In other words, in the same region, the longer the transmission line with the same voltage level is, the higher the forced outage rate is. However, this is not conform to the actual. The power system contains twofold uncertainty, consisting of random and fuzzy. Therefore, we need to evaluate random and fuzzy of the maintenance plan comprehensively. Credibility Theory provides a comprehensive assessment for the fuzziness and randomness, which is the key to solve the problem that traditional line maintenance scheduling model is not applicable to practice. In this paper, combined with the IEEE-RBTS system, the model and algorithm of short-term transmission line maintenance scheduling based on credibility theory is presented.