A New Architecture Topology for Back to Back Grid-Connected Hybrid Wind and PV System

Abstract

In this paper, a new grid-connected hybrid distributed generation system architecture has been proposed. The proposed architecture provides an efficient power transfer with a reduced number of power converters and conversion stages as compared to existing architectures. In this proposed architecture, the wind and solar PV hybrid generation system is coupled to the grid with a back-to-back voltage source converter. The Photovoltaic (PV) array is attached instantly to the dc-link bus without any intermediary power converters and maximum power is extracted from the solar PV system by Maximum Power Point Tracking (MPPT) algorithm and the output voltage of the PV system is given to the dc-link. Permanent Magnet Synchronous Generator (PMSG) is connected to the wind turbine system and it delivers maximum power with an optimal torque control algorithm and further, it generates reference currents for Wind Side Converter (WSC). The merit of the proposed scheme is that peak power is obtained from both the energy sources with two independent MPPTs. Further, the DC link voltage is inverted and can synchronize with the grid by employing Grid Side Converter (GSC). The proposed work has been implemented using MATLAB/Simulink under various modes of power transfer conditions.