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access icon free Control design and experimental verification of the brushless doubly-fed machine for stand-alone power generation applications

© The Institution of Engineering and Technology
Received 31/10/2014, Accepted 15/07/2015, Revised 01/06/2015, Published 01/01/2016

In this study, a control scheme for the stand-alone generation system based on brushless doubly-fed machine (BDFM) is presented. The output voltage amplitude and frequency are kept constant under variable rotor speed and load by regulating the amplitude and frequency of the control winding (CW) current of BDFM appropriately. The control scheme utilises a CW current vector controller as the inner loop, and a power winding voltage amplitude controller and a frequency controller as the outer loop. The proposed control scheme has been implemented on a prototype BDFM designed for the variable-speed stand-alone ship shaft generation application. Moreover, the satisfactory dynamic performance and low total harmonic distortion of the output voltage in the proposed stand-alone generation system is verified by experiments with two kinds of typical loads: three-phase induction motor load and three-phase RL inductive load.

Inspec keywords: marine power systems; control system synthesis; load regulation; power generation control; machine vector control; frequency control; rotors; brushless DC motors; voltage control; induction motors

Other keywords: variable rotor load; control design; outer loop; frequency controller; three-phase induction motor load; CW current vector controller; control winding current amplitude regulation; stand-alone power generation applications; control winding current frequency regulation; constant output voltage amplitude; power winding voltage amplitude controller; experimental verification; stand-alone ship shaft generation application; constant output frequency; three-phase RL inductive load; brushless doubly-fed machine; variable rotor speed; BDFM; inner loop

Subjects: Frequency control; Control system analysis and synthesis methods; d.c. machines; Voltage control; Control of electric power systems; Asynchronous machines; Transportation

References

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