Abstract
This paper focuses on a Z source cascaded multilevel inverter which is designed to minimize harmonics in the output voltage. A balanced dc-link peak voltage can be achieved. The power generation module is built by PV panels which are connected to Z-Source Cascade H-bridge inverter. Cascaded multilevel inverter can achieve the distributed maximum power point tracking to increase the system efficiency and achieve high voltage/high power grid tie without a transformer. This paper analyzes the different PWM switching scheme and the operating states of a ZSI module and comparison is made with different PWM and total harmonic distortion of various PWM schemes.
Highlights
Alternate energy sources such as solar, fuel cell, and wind have a wide voltage change range due to the nature of these sources
This paper focuses on a Z source cascaded multilevel inverter which is designed to minimize harmonics in the output voltage
The simulation results of various pulse width-modulated (PWM) schemes of corresponding ZS cascaded H bridge multilevel inverter fed with motor load is shown in figures below
Summary
Alternate energy sources such as solar, fuel cell, and wind have a wide voltage change range due to the nature of these sources. The Z-source converter/inverter systems can solve this problem This single stage power conversion technology provides a great alternative with lower cost, higher reliability, and higher efficiency. A single-phase multistring five-level photovoltaic (PV) inverter topology for grid-connected PV systems with a novel pulse width-modulated (PWM) control scheme is proposed [6]. Comparisons have made with SVM and carrier based modulation [10] It focused on harmonic elimination in non equal dc voltage source [11] [12]. These devices, with their strong building integration and their development in urban zones can be subjected to severe shadows.
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