The relationship between reliability indices and daily load curve

Generally, the moment of interruption occurs stochastically. The most important task in respect of reliability is to find the relationship between interruption and its starting moment. Actually, there is a relationship between the moment of interruption beginning and the daily load curve. Interesting conclusions can be drawn by observing contribution of each interruption to the reliability indices (SAIFI, SAIDI) and by comparing it to daily load curve and moment of interruption beginning. Probability of interruption with more difficult consequences is higher within heavily loaded network than during light load regimes. Also, the interruptions that happen out of working hours usually have longer duration. Accordingly, it is possible to take some actions for improving reliability. This paper deals with the relationship between reliability indices and the daily load curve calculated on the real network.