Evaluation model for urban power supply systems

Abstract

The present article deals with the issue of evaluation of state of urban power supply systems (hereinafter PSS). Such systems are characterized by large size and low reliability of the available data. The suggested evaluation model (EM) is based on elements of the fuzzy logic theory and on the informational graph structure of the power network. EM allows for evaluation of the PSS objects irrespective of their size. PSS object here stands for any part of the PSS, from power switch to complex PSS with substations and transmission lines of various voltage. Graph-based structure of the network model (NM) provides for connection between the objects and allows to select parts in necessary and sufficient detail. Evaluation is made by quantitative indicators that reflect performance of the objects in various spheres (technical, exploitation, ecological etc) with transition to qualitative states: normal, pre-emergency and emergency states. © (2012) Trans Tech Publications.