Simplified reliability evaluation formulae for overhead medium voltage distribution networks

• Published in: 2016 International Conference on Probabilistic Methods Applied to Power Systems (PMAPS) pp. 1 - 6
• Main Authors: Wan Lingyun, Zhang Ying, Wei Tingting, Liao Yixi, Zhou Qing, Xia Lei, Wang Zhuding, Tang Fengying
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.10.2016
• Subjects: big lateral lines; Decision support systems; Indexes; Interrupters; medium voltage overhead distribution system; Nickel; Reliability; simplified reliability evaluation; Switches; various switches
• DOI: 10.1109/PMAPS.2016.7763924

For the reliability evaluation of overhead medium voltage distribution networks, the required data of traditional methods are too big to be collected and inputted. Moreover, some data of a distribution power grid, especially the planning distribution networks, cannot be completely provided. As a result, it is necessary to put forward simplified reliability evaluation formulae. In this paper, the simplified evaluation formulae of system average interruption duration and frequency indexes for failure outage and scheduled interruption are deduced respectively, considering the influences of not only the main lines, distribution transformers and switches of a single type, but also big lateral lines and various types of switches, thus making the formulae more practical. Moreover, according to the interruption times based on the line length or the line segment number, two sets of evaluation formulae of scheduled interruption are deduced. The reliability evaluation of IEEE RBTS-Bus2 is performed by using the deduced formulae, and the results of better precision are obtained with little increased input data.