An integrated control approach for standalone operation of a hybridised wind turbine generating system with maximum power extraction capability
This paper presents a novel configuration of a hybrid wind generating system which can be used as a remote area power supply (RAPS) system. The proposed wind energy conversion system consists of a doubly-fed induction generator (DFIG) and a permanent magnet synchronous generator (PMSG) where the latter is connected to the DC bus of the DFIG generator. In addition, a battery storage system is also incorporated into the DC bus to address the demand-generation mismatch. Control strategies for individual system components of the RAPS system are designed with a view to achieve an acceptable level of voltage and frequency regulation while extracting the maximum power from wind. The performance of the proposed RAPS system is investigated in terms of voltage and frequency regulation capability under changing wind and variable load conditions. © 2013 Elsevier Ltd. All rights reserved.