Frequency control from wind power stations with battery energy storage

One of the main limitations of battery systems is their low energy capacity. The control schemes presented throughout this thesis promote sustentation of the battery system’s nominal charge levels to mitigate energy capacity issues and to increase the self-sufficiency of wind-battery power stations. New control measures for wind power stations to enable self-regulating, dispatchable power generation will be key to delivering on Ireland and Northern Ireland’s renewable energy share in electricity goals.

This thesis explored coordination schemes for wind-battery power stations to enable dispatchable generation, synthetic inertia and predictable droop action to frequency excursion events. Test case results, produced using DIgSILENT PowerFactory, demonstrated the effectiveness of the control schemes presented, and the advantages they offer over methods currently employed in industry. It is concluded that the methods proposed in this thesis can be used to improve the reliability, predictability, and efficiency of response from wind-battery systems to enable wind power stations to provide greater levels of frequency control system services to system operators.