Abstract
Aiming at the instability of voltage and large network loss of dispersed wind farms (DWFs) integration into distribution network (DN), an optimal power factor regulation method based on improved firefly algorithm is proposed. Firstly, the generalized load model based on the static voltage characteristics is analyzed. Then reactive power capabilities of DWFs are thoroughly discussed and the influences of DWFs with variable power factor on network loss and voltage profile are presented. In order to reduce network loss and enhance power quality, optimal power factor regulation of DWFs based on improved firefly algorithm (IFA) is proposed. Finally, results of the benchmark IEEE-33 node system show the feasibilities and validities of the proposed method and the superiorities of proposed IFA are revealed by comparison with the existing algorithms.
Highlights
As the development of distributed energy, dispersed wind farms (DWFs) are expected to comprise a significant portion of future power generation
DWFs take some degree of responsibility for system support and their roles are changed from the passive actuators into active participators, which is an important element of changing traditional distribution network (DN) operation into active DN operation [3, 4]
The grid-side converter (GSC) is connected to the grid and is usually controlled to provide a steady DC-link voltage and meet the power quality requirements, while the rotor-side converter (RSC) is connected to the rotor windings of the Doubly-Fed Induction Generator (DFIG) and control the active and reactive power injected into the grid
Summary
As the development of distributed energy, dispersed wind farms (DWFs) are expected to comprise a significant portion of future power generation. According to traditional “fit and forget” practice, DWFs usually operate at maximum power point and unity power factor, which are mostly treated as negative fluctuant loads in the conventional DWF management [1, 2] In this way, the inherent uncertainty and variability of wind power supply further deteriorate the voltage profiles of DN. The common disadvantages of these algorithms are premature convergence of the population and slow convergence rate [10, 11] To address these issues, optimal operation of DWFs considering reactive power support capabilities and load types is proposed for network loss reduction and power quality enhancement. Afterwards, the reactive power capabilities of DWFs are thoroughly discussed On this basis, the multiobjective optimization function is established, considering the various load and stochastic wind conditions as well as the system equality and inequality constraints. Results in the benchmark IEEE-33 node radial distribution system validate the effectiveness of the proposed method
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
