Control of PV-Wind-Diesel Hybrid System with BESS for Optimal Operation

Abstract

This work presents a proposed power system with a diesel generator (DG), wind energy conversion system and solar photo voltaic (PV) system. The proposed power system with its control techniques, regulates the loading of DG to achieve a low specific fuel consumption with the help of wind energy conversion systems (WECS) and SPV system. The doubly fed induction generator (DFIG) is used in WECS system.  The WECS system consists of two voltage source converters (VSCs) for the system control. One converter is the rotor side converter (RSC), which helps in achieving maximum power point tracking of the wind turbine. Another one is the generator side converter (GSC), which helps in regulating DG generation while maintaining WECS generator as well as Diesel generator currents balanced, unbalanced and harmonics within the requirement of the IEEE-519 standard at different load conditions. The system envisages an energy storage by connecting a battery bank at the DC bus of DFIG. The battery bank provides a buffer storage. To increase optimal operation, solar PV system with MPPT technique also integrated with DG system, and SPV system with MPPT algorithm maintain DC link voltage. The proposed power system is modelled using MATLAB Sim-power-system tool box and proposed system performance results are presented under variation of linear loads, nonlinear loads, unbalanced loads.