Performance evaluation of an isolated system using PMSG based DG set, SPV array and BESS

This paper proposes an isolated hybrid system consisting of a solar photovoltaic (SPV) panel along with a diesel engine driven permanent magnet synchronous generator (PMSG) and a battery energy storage system (BESS) feeding three-phase four wire loads. The deployment of this microgrid system is to maximize utilization of renewable resources for energy security and improved power quality. The incremental conductance (InC) maximum power point tracking (MPPT) algorithm is applied for extracting the maximum power of the SPV panel. The controller makes use of the enhanced phase locked loop (EPLL) technique and is shown to provide for load balancing, reactive power compensation and harmonics compensation capabilities under different loading conditions. A four-leg voltage source converter (VSC) with BESS further provides neutral current compensation apart from coordinating power flow within the autonomous system. Performance of the controller has been analyzed by modeling the system in MATLAB/SMULINK using sim-power system (SPS) block-set.