Optimal reactive power dispatch of power systems using a modified genetic algorithm

An optimization method was proposed to solve the bus voltage-rise problems when newly establish the transmission lines and transformer stations, which is caused by using a large number of underground cables. The modified genetic algorithm was applied to do the optimal reactive power dispatch in order to control the buses voltages within the safety margins for off-peak power system. In this paper, the chromosomes of genetic algorithm can be shorter owing to adding the constraints of multivariables. Therefore, the modified genetic algorithm has the advantages of simpler construction, easy to access, and faster than original one. The simulation results show that the proposed algorithm performs well on the power system.