Abstract-This article presents an enhanced control strategy for a direct-driven permanent synchronous generator based wind-power generation system with a flywheel energy storage unit. The behaviors of the direct-driven permanent magnet synchronous generator system with a flywheel energy storage unit under unbalanced grid fault conditions are investigated. Three control targets for the grid-side converter during network unbalance conditions are identified, including eliminating the oscillations in the total active power or reactive power or no negative-sequence current injecting into the grid. Meanwhile, the DC-link voltage oscillations can be effectively suppressed during the unbalanced grid fault by controlling the flywheel energy storage unit. Furthermore, a proportional-integral-resonant controller is designed for the flywheel motor to eliminate the oscillations in the DC-link voltage. Finally, the proposed coordinated control strategy for the direct-driven permanent magnet synchronous generator system with a flywheel energy storage unit has been validated by the simulation results of a 1-MW direct-driven permanent magnet synchronous generator wind power generation system with a flywheel energy storage unit under unbalanced grid fault.
Enhanced Control for a Direct-driven Permanent Synchronous Generator Wind-power Generation System with Flywheel Energy Storage Unit Under Unbalanced Grid Fault
2015
Aufsatz (Zeitschrift)
Englisch
back-to-back pulse-width modulation converter , proportional-integral-resonant controller , double-frequency oscillations , wind-power generation system , direct-driven permanent magnet synchronous generator , active power , Electrical currents , Power supply , Electricity generation , Generators , reactive power , unbalanced grid fault , Simulation , Wind power , enhanced control , flywheel energy storage unit
Performance analysis of the permanent-magnet induction generator under unbalanced grid voltages
Online Contents | 2007
|