Simulation of a Wind Turbine Generator Coupled with a Battery-Supercapacitor

The paper presents a model of stand-alone wind turbine system. The system consists of wind turbine, Permanent Magnet Synchronous Generator (PMSG), controller converter, hybrid energy storage, dump load and mains load. All these put together forms the Remote Area Power System (RAPS). The system is implemented using MATLAB/ SIMULINK software.The hybrid energy storage consists of battery storage and a supercapacitor where both are connected to the DC bus of the RAPS system. An energymanagement algorithm (EMA) is proposed for the hybrid energy storage with a view to improve the performance of the battery storage. A synchronous condenser is employed to provide reactive power and inertial support to the RAPS system. A coordinated control approach is developed to manage the active and reactive power flows among the RAPS components. It has been demonstrated that the proposed method is capable of achieving: a) robust voltage and frequency regulation (in terms of their acceptable bandwidths), b) effective management of the hybrid storage system, c) reactive power capability and inertial support by the synchronous condenser, and d) maximum power extraction from wind.