An Efficient Random Forest Crow Search Algorithm Control Strategy For Photovoltaic Connected Quasi ZSource Cascaded Multilevel Inverter System

Abstract

ABSTRACT newline newlineThis thesis deals with the design and development of new Z- source inverter and quasi Z-source inverters topologies and its variants applicable for solar photovoltaic power systems are verified through simulation and experimental validation. The design of proposed topologies of Z-source inverters are based on the comprehensive study of existing Z-source inverters to suit for various applications. While designing impedance network of Z-source inverters, solar photovoltaic modules are treated as the input sources, so modelling, simulation and experimental verification of solar photovoltaic systems are carried out to obtain its performance characteristics. Photovoltaic (PV) modules connected in different array configurations are analyzed under normal/ partial shaded conditions and their performance are obtained in terms of current-voltage and power-voltage characteristic curves, operating at different temperature and insolation conditions through simulation and the same is checked with suitable experimental set up to identify the best possible PV array configuration to be employed in the proposed Z- source inverter topologies under investigation are discussed in Chapter newline2. Chapter 3 deals with the performance analysis of Z-source and seven level neutral-point clamped multilevel inverter. ZSI is used to overcome the AC voltage output short coming is lower or higher than the DC voltage input. Z-source inverter topologies are found to be promising to have better output voltage gain, smoother waveform and also it can accommodate modifications needed in its higher versions. Chapter 4 deals with the analysis of Z-Source cascaded fed multilevel inverters are newline newline newline newline newlineused for high-voltage applications. These inverters decrease the Total Harmonic Distortion (THD), and it has a good performance for various electrical power system applications. Chapter 5 describes an effective AI newlinecontrol technique-based improved QZS-CMI topology for interfacing newlinePV system. Generally, the interface between the PV DC source and the newline newlineload