Three-Phase Cascaded Nine-Level Inverter for Grid-Connected Solar PV System

International Journal of Electrical and Electronics Engineering

© 2022 by SSRG - IJEEE Journal

Volume 9 Issue 12

Year of Publication : 2022

Authors : Ch. Santosh Kumar, S. Tara Kalyani

10.14445/23488379/IJEEE-V9I12P107

How to Cite?

Ch. Santosh Kumar, S. Tara Kalyani, "Three-Phase Cascaded Nine-Level Inverter for Grid-Connected Solar PV System," SSRG International Journal of Electrical and Electronics Engineering, vol. 9,  no. 12, pp. 81-100, 2022. Crossref, https://doi.org/10.14445/23488379/IJEEE-V9I12P107

Abstract:

A hybrid approach for a three-phase cascaded multilevel inverter (CMLI) for a grid-connected PV system is proposed in this paper. The photovoltaic (PV) is connected to CMLI isolated DC-connections based on the respective DC-toDC converters. The proposed hybrid method is the joint performance of white shark optimizer (WSO) and extended fuzzy wavelet neural network (FWNN); thus, it is known as the WSO-FWNN method. The primary objective of the proposed method is to regulate the power or increase the energy conversion of solar systems and to maintain the power quality. CMLI is incorporated switches, diodes and sources that are modelled to obtain the optimal control signal with the proposed controller. WSO produces the most optimal control signal data set from the CMLI and evaluates the gain parameter under the source's current normal value. FWNN is performed, which forecasts the most optimal control signals from the CMLI using the data set produced by the WSO. The variation of the system parameters and the external disturbance is reduced with the proposed method, and it satisfies the load demand of the system. At last, the proposed approach is actualized on the MATLAB/Simulink platform, and its performance is compared with existing methods. From the simulation outcome, the proposed approach shows less switching power losses of 0.04 W and a THD of 2.51%.

Keywords:

Cascaded multilevel inverter, DC to DC converters, photovoltaic, THD, Power Quality.

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