Modelling and simulation investigation of multi-string photovoltaic array system with MPPT controlled DC/DC converter

• Main Authors: Anang, N., Muda, W. M. W.
• Format: Conference Proceeding
• Language: English
• Subjects: Algorithms; Circuits; Electric converters; Incremental conductance; Irradiance; Maximum power tracking; Photovoltaic cells; Simulation; Strings; Voltage converters (DC to DC)
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0110796

This paper presents the simulation of power generation in a photovoltaic (PV) system that applies maximum PV power point tracking (MPPT) in a DC/DC boost converter. The MPPT is responsible to obtain the possible maximum PV power to be extracted to the input of the DC/DC boost converter. Although there are equations available to calculate the value of components in DC/DC circuit in literature, the validation of input parameters of the converter which are crucial in the design process was not properly presented, especially for different solar irradiance and temperature. Thus, this paper shows a step-by-step simulation of multi-string PV with converter, from designing the converter based on the PV specification and constructing the model by using MATLAB/Simulink software system. Next, the algorithm of the incremental conductance method was developed in MPPT to control the duty cycle of the converter. The result shows that the developed system has successfully output the maximum power under different solar irradiance and temperature with high efficiency of 99.0%. Simulation results were validated using the P-V curves of the selected PV modules. Then, the proposed model can then be connected to an inverter for a complete grid-connected PV system in the future.