Control of Standalone Hybrid Renewable Generation System with Advanced Controllers

In the near future, most of the electrical power generation will rely on renewable sources with zero carbon emissions. When these renewable sources are connected to the grid in parallel, they only need synchronization controllers. This paper examines a standalone renewable system comprising a PV plant, a wind generator, and a Battery Energy System (BES) module for testing. All these sources are integrated to meet the local load demand. The PV plant and wind generator require MPPT modules for maximum power extraction, and the BES is connected at the common DC link. To achieve this, SMC-P&O MPPT is used for stable renewable power extraction, and inverter control is adopted with APC based AWPI controller to reduce harmonics. In further modification, the SMC MPPTs of the PV plant and wind generator are updated with a Fuzzy module for increased power extraction and faster response to variable solar irradiation. In the interfacing inverter control, the AWPI controller is replaced with a Dual Sliding Mode-Proportional Integral (DSM-PI) controller for reduced THD in the inverter voltages and currents. A comparative analysis is conducted to compare both the test systems with SMC MPPTs, AWPI, and Fuzzy SMC MPPTs, DSM-PI to validate the optimal system.