A comparative study of vector-control strategies for maximum wind-power extraction of a grid-connected wind-driven brushless doubly-fed reluctance generator. Issue 1 (3rd April 2017)

• Record Type: Journal Article
• Authors: Mousa, Mohamed G.; Allam, S. M.; Rashad, Essam M.
• Is Part Of: Australian journal of electrical & electronics engineering. Volume 14:Issue 1/2(2017)
• Page Start: 1
• Page End: 11
• Publication Date: 2017-04-03
• Subjects: Brushless doubly fed reluctance generator -- wind energy conversion system -- soft starting -- vector control -- maximum wind-power extraction -- unity power factor -- minimum converter current -- minimum copper losses; Electrical engineering -- Periodicals; Electronics -- Periodicals; Periodicals; 621.305
• DOI: 10.1080/1448837X.2017.1410964
• Languages: English
• ISSNs: 1448-837X

Abstract

Abstract: This paper proposes a vector-control technique of a grid-connected wind-driven Brushless Doubly Fed Reluctance Generator (BDFRG) for maximum wind-power extraction under three strategies, summarised as unity power-factor operation, minimum converter current and minimum copper losses. The adopted generator has two stator windings namely; power winding, directly connected to the grid, and control winding, connected to the grid through a bi-directional converter. In addition, a soft starting method is suggested to avoid the employed converter over-current. The first control strategy can be achieved by adjusting the command power-winding reactive power at zero for a unity power-factor operation. However, the second strategy depends on setting the command d -axis control-winding current at zero to maximise the ratio of the generator electromagnetic-torque per the converter current. This enables the system to get a certain command torque under minimum converter current. On the other hand, the third strategy can be realised by determining the control-winding current angle at which the BDFRG can operate with minimum copper losses. A sample of the obtained simulation results is presented to check the effectiveness of the proposed control strategies.