Abstract
In modern power system, distributed generators (DGs) have become an effective method to reduce active power loss, improve voltage stability, etc.. In this paper, a new Improved Firefly Algorithm (IFA) is proposed to obtain optimal placement and capacity of DGs to improve power flow distribution and voltage stability, reduce active power loss in distribution system. Compared with the standard Firefly Algorithm (FA), the proposed IFA has better convergence speed and can obtain a smaller active power loss. In addition, the power loss sensitivity factors are introduced to steer the algorithm to seek the best position about the DGs. In order to verify the performance of IFA, IFA and FA are tested on the standard IEEE-33 and IEEE-69 systems to solve the problem of joint configuration optimization of multiple generators. The results of simulation show the active power loss of the distribution system decreases and the voltage stability of the system node improves. By comparing the results of the IFA and FA, a conclusion can be reached, the IFA is more effective and more suitable to reduce active power loss by reasonably allocating the capacity and placement of DGs than FA.
Published Version
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