Modelling of standalone photovoltaic-wind-battery hybrid power systems using physics-based battery models

Standalone hybrid power systems consist of one or more renewable energy sources (RES) along with battery energy storage (BES) system satisfying the power demand of the consumers. A generic framework is presented to evaluate the performance of a standalone PV-wind-BES hybrid power system using physics-based battery models. The system considered in this work comprises of PV panels, Maximum Power Point Tracking controller, wind turbine, power electronics, and lithium-ion batteries (LiBs). The dynamic behaviour of LiBs is simulated using a physicsbased battery model. These models explicitly represent the transport and kinetic processes that take place within the LiB which help in understanding their operations and achieving better prediction of their performance. The framework for a standalone PV-wind-BES hybrid system is implemented in a MATLAB Simulink environment. A case study is provided using data from a remote residential area in India which includes variability in load demand and generation to demonstrate the effectiveness of the proposed framework. The physics-based battery models can be beneficial to analyse the thermal effect and capacity fade to make the best use of the BES in hybrid power systems.