A split Bregman method solving optimal reactive power dispatch for a doubly-fed induction generator-based wind farm

Abstract

This paper proposes an optimal reactive power control method to maximize wind farm revenue and minimize the total electrical losses of a doubly-fed induction generator (DFIG)-based wind farm. Specifically, the split Bregman method is used to solve the optimal control problem in a distributed manner. That is, the optimization problem is decomposed into sub-problems by the optimal distributed control strategy, and each sub-problem is solved independently in each local controller through the parallel method, which reduces the calculating burden and improves the information privacy. Thus, when a fault occurs, the proposed distributed control strategy can overcome the system fault and improve the reliability and security of the system. Furthermore, an economic financial model of annual revenue is contributed to examine the income impact with or without certified emission reduction (CER) by the clean development mechanism (CDM). Compared with the dual ascent (DA) method, sequential quadratic programming (SQP) method and the proportional dispatch method (PDM), the annual revenue (AR) of the wind farm using the proposed split Bregman method is the highest. Simulation results demonstrate that this method has promising performance in both optimization quality and computational efficiency.

Low-voltage ride-through capability in a DFIG using FO-PID and RCO techniques under symmetrical and asymmetrical faults

“…Symmetrical faults (SFs), characterized by a balanced distribution of fault currents across the three phases, and asymmetrical faults (AFs), entailing uneven fault impedances among the phases, are formidable challenges that demand astute handling. These fault scenarios can swiftly cascade into disruptions, jeopardizing the uninterrupted operation of DFIG systems and potentially compromising the stability and reliability of the broader power grid network 4 , 5 . As the integration of renewable energy systems, including wind turbines employing DFIG technology, escalates, the significance of assuring their steadfast operation under fault conditions becomes increasingly pronounced.…”

Optimal Efficiency Control of Wind Mill Induction Generator Using Loss Minimization Technique

“…Wind farms are being built owing to the policy of low tariff plans in a greater number of on-shore and offshore for electricity from natural renewable wind energy sources [1]. According to variable wind velocities, the maximum power capture, it is advantageous to change the rotational speed of the turbine/generator [2,3]. Optimal Tip Speed Ratio (TSR) [4,5] and research-based control [6,7] are two methods for maximum wind power extraction.…”

Reactive Power Dispatch Algorithm for a Reduction in Power Losses in Offshore Wind Farms

“…Having been developed for more than two decades, many classical optimization methods have been proposed to solve the ORPD problem, such as sequential quadratic programming (SQP), linear programming (LP), non-linear programming6, and interior point methods (IPM). Despite the success in terms of the accuracy and robustness of classical methods on some specific problems, most of these methods have difficulty in dealing with the problems that have non-linear and discontinuous objectives [2][3][4][5][6][7].…”