Decision based VAR compensators placement in electric power systems

The authors discuss the utilization of a decision making methodology for optimal placement of volt ampere reactive (VAr) compensators in electric power systems. The methodology will help electric power system planners to select one overall reactive power installation pattern that will satisfy system performance as well as engineering and economic constraints. The main goal of the optimal placement of VAr compensators is the selection of specific load buses in the network which can satisfy several criteria. For the decision making process, the results of analysis of each criterion is interpreted into a verbal rating rather than using the precise numerical values. The ratings can therefore be expressed by the degree of belonging to a fuzzy set, which allows for numerical representation of ratings over a range of values