Improved methods of power systems availability indices determination

This paper presents a role of reliability aspect in the power system supply quality. Increasing importance of availability indices in quality improvement evaluation in power delivering and some cost savings at the same time is given here. The evaluation method has been developed to solve a real technical and management problem — define optimal power system switching state. The evaluation method is based on Markov state space model of power lines as system components, enumerating all possible power system states and composed of an independent power system components failures time-series data, their coincidence of the first, second and the third order for the branches (lines and transformers), storing in a relational system database. Some input variables and detailed reliability results calculated for all buses in the distribution power system of area Slavonski Brod are a part of this paper too.