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Abstract

This paper presents the application of recent nature inspired computing (NIC) techniques in solving the Optimal Reactive Power Dispatch (ORPD) problem. As been known, ORPD is a well-known nonlinear optimization problem in power system operation and planning. In order to obtain the best combination of control variables such as generator voltages, tap changing transformers ratios and the amount of reactive compensation devices, optimization approach need to be done so that the loss minimization as objective function can be achieved. In this paper, four NIC techniques namely Cuckoo Search Algorithm (CSA), Grey Wolf Optimizer (GWO), Gravitational Search Algorithm (GSA) and Firefly Algorithm (FA) have been applied into ORPD problem. The quality of each technique in obtaining the combination of control variables is tested on IEEE 57- bus system.