Abstract
In this paper, the approach focused on the variables involved in assessing the quality of a
distributed generation system are reviewed in detail, for its investigation and research contribution.
The aim to minimize the electric power losses (unused power consumption) and optimize the voltage
profile for the power system under investigation. To provide this assessment, several experiments
have been made to the IEEE 34-bus test case and various actual test cases with the respect of multiple
Distribution Generation DG units. The possibility and effectiveness of the proposed algorithm
for optimal placement and sizing of DG in distribution systems have been verified. Finally, four
algorithms were trailed: simulated annealing (SA), hybrid genetic algorithm (HGA), genetic algorithm
(GA), and variable neighbourhood search. The HGA algorithm was found to produce the best solution
at a cost of a longer processing time.