Title: Performance Analysis of Maximum Power Point Tracking Control System for Standalone Photovoltaic Using MRAC Augmented PI Controller
Authors: Osinachi Bright Abika, Oliuwafemi Tayo Ojo, Chisom Victory Onyenagubo, Chukwunomso Samuel, Michael Oluwatosin Akinbolusere, Felix Iyanu Ogunleye, Chinonso Valentine Nnachetam
Volume: 9
Issue: 2
Pages: 41-53
Publication Date: 2025/02/28
Abstract:
The idea behind maximum power point tracking (MPPT) is to ensure that generated power is optimally transferred from the photovoltaic (PV) module to the output of the renewable energy system. Without a proper method to resolve power transfer inefficiency from PV module to connected load, instability may ensue. Hence, in this paper a model reference adaptive control (MRAC) augmented proportional integral (PI) controller called MRAC-PI has been designed to improve the dynamic response characteristics of MPPT control system in a PV system. The system was modelled in MATLAB/Simulink environment. Simulation was initially conducted for the conventional (open loop) MPPT control system and the performance revealed that it suffers from significant overshoot and steady-state error. Hence, the designed MRAC-PI controller was introduced and the adaptation gain selected from low to high value range,1???30.The simulation test revealed that for the adaptation gain considered in this paper the system MRAC-PI provided promising performance and improved stability and reliable control link. An in depth analysis considering the deviation of the system response from the reference model, the update signal, and cost function revealed that with adaptation gain of 15, the system will ensure that efficient and reliable MPPT is achieved with the most optimal model following tracking error. This resulted in rise time of 0.45 s, peak time of 0.91 s, settling time of 1.06, peak overshoot of 2.73%, and zero steady-state error.