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Design a Switched DC Sources based Multilevel Inverter for PV System
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 183 - Number 1 |
| Year of Publication: 2021 |
| Authors: Fazal Ur Rehman Soomro, Mukhtiar Ahmed Mahar, Abdul Sattar Larik |
10.5120/ijca2021921274
|
Fazal Ur Rehman Soomro, Mukhtiar Ahmed Mahar, Abdul Sattar Larik . Design a Switched DC Sources based Multilevel Inverter for PV System. International Journal of Computer Applications. 183, 1 ( May 2021), 24-31. DOI=10.5120/ijca2021921274
Abstract
Integration of the renewable energy sources into the ac power grid is the most challenging task for the researchers and because of the limited resources of fossil fuels, it is the necessity of the modern time period to integrate the non-conventional sources into the ac power grid for the reliable future of the power system. The usage of photovoltaic (PV) cells is dramatically increasing very rapidly in each department of life because of their small environmental impacts, pollution-free benefits, require little maintenance, and zero noise capacity. The research work focuses on the integration of the PV system with the newly proposed topology called the switched dc sources based multilevel inverter for low, medium, and high power applications. The output of both PV panels is used as input dc voltage sources to the proposed inverter. The Phase Opposition Disposition (POD) switching technique of Pulse Width Modulation (PWM) is employed for the switching of the power switches of the new topology inverter. The Perturb and Observe (P&O) algorithm of Maximum Power Point Tracking (MPPT) controls each array in the PV system. To obtain the constant output voltage from the PV system, the P&O algorithm is used to control the duty cycle of the DC-DC boost converter. The single-phase five-level inverter is utilized for the conversion of the dc power obtained from the PV array into the ac power. The waveform of the output voltage and current are obtained and its THDs is analyzed. The overall device count is reduced and the better output quality of the waveform is obtained with the usage of a fewer number of power switches than conventional topologies. The performance of the single-phase five-level switched dc sources based multilevel inverter for PV system, is evaluated in the MATLAB/Simulink software.
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