Fuzzy Logic Controller Modelling for Economic Dispatch and Unit Commitment in Electrical Power System

This paper presents an implementation of fuzzy-logic controller to solve the unit-commitment and economic dispatch problem of thermal generation plant with the main objective of evaluating the total minimum operating cost for each loading condition while subjected to a variety of constraints. The model in this study contains five generation units and the daily load demand is subdivided into 12 intervals. The unit combinations and the corresponding generation scheduling intend to minimize the operating cost. The implementation of fuzzy-logic allows a qualitative description of the behaviour of the system: the system's characteristics and the response without the need for exact mathematical formulations. The numerical values are evaluated by the fuzzy-logic approach. The results have shown that the proposed fuzzy-based approach provides feasible combinations of the generation units and economical cost of operation of these units and have also shown the optimium modelling of the proposed fuzzy-logic approach as compared to other conventional mathematical modelling based approaches.