A Compressed Air Energy Storage (CAES) test-bed has been developed to experimentally demonstrate the energy stor-age concept proposed in  for offshore wind turbines. The design of the testbed has been adapted to the available air com-pression/expansion technology. The main components of the system consist of an open accumulator, a hydraulic pump-motor, air compressor/expander, an electrical generator and load, a differential gearbox and a hydraulic control valve. These components are first characterized and then a dynamic model of the system has been developed. The objective is to regulate the output current/voltage of the generator while maintaining a constant accumulator pressure in the presence of input and demand power variations in the system. This is achieved by Proportional-Integrator (PI) control of pump-motor displacement and field current of the generator. The sta-bility of these controllers has been proved using an energy-based Lyapunov function. Experimental results for storage and regeneration modes have been presented showing excellent performance of the system in response to power disturbances.
|Original language||English (US)|
|Title of host publication||Dynamic Modeling and Diagnostics in Biomedical Systems; Dynamics and Control of Wind Energy Systems; Vehicle Energy Management Optimization; Energy Storage, Optimization; Transportation and Grid Applications; Estimation and Identification Methods, Tracking, Detection, Alternative Propulsion Systems; Ground and Space Vehicle Dynamics; Intelligent Transportation Systems and Control; Energy Harvesting; Modeling and Control for Thermo-Fluid Applications, IC Engines, Manufacturing|
|Publisher||American Society of Mechanical Engineers|
|State||Published - 2014|
|Event||ASME 2014 Dynamic Systems and Control Conference, DSCC 2014 - San Antonio, United States|
Duration: Oct 22 2014 → Oct 24 2014
|Name||ASME 2014 Dynamic Systems and Control Conference, DSCC 2014|
|Other||ASME 2014 Dynamic Systems and Control Conference, DSCC 2014|
|Period||10/22/14 → 10/24/14|
Bibliographical notePublisher Copyright:
Copyright © 2014 by ASME.