PV power conditioning system using a three-phase multilevel pulse width modulation inverter employing cascaded Scott transformers
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TLDR
This study proposes a new structure for the three-phase DC−AC conversion stage for a grid-connected PV system that consists of two four-leg two-level voltage source inverters that are connected to two PV generators.Abstract:
Voltage source inverters (VSIs) are power converters that are considered essential in grid connected photovoltaic (PV) generators. There are several types of topologies for these converters. However, from the point of view of high-quality AC output voltage, multilevel inverters are considered the most adequate. Under this context, this study proposes a new structure for the three-phase DC−AC conversion stage for a grid-connected PV system. It consists of two four-leg two-level voltage source inverters that are connected to two PV generators. These inverters are associated with two Scott transformers. The secondary windings of the transformer are connected in a way that allows a series connection. Due to this, a multilevel operation will be achieved. The performance of the proposed power conditioning system will be verified through simulation and experimental results.read more
Citations
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Voltage Source Multilevel Inverters With Reduced Device Count: Topological Review and Novel Comparative Factors
TL;DR: This article updates and summarizes the recently developed multilevel topologies with a reduced component count, based on their advantages, disadvantages, construction, and specific applications, and proposes a comparative method with novel factors to take component ratings into account.
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Research on FPGA controlled three phase PV inverter using multi carrier PWM control schemes
TL;DR: Reduced active switching count, transformers, Single DC input (SDC), modular topologies and redundancy are key advantages, and the effectiveness of the inverter is analyzed in terms of Total Harmonic Distortion (THD) by varying the Modulation Index (MI).
Proceedings ArticleDOI
Modulated Model Predictive Current Control of a Four-Leg Inverter
TL;DR: A novel modulated model predictive current control for a two-level four-Leg voltage source inverter is proposed by combining the operating principles of traditional predictive control with the three-dimensional space vector modulation to enhance the output power quality, while producing fixed switching frequency operation and fast dynamic response for the four-leg inverter.
Proceedings ArticleDOI
A Skewness Based Method for Diagnosis in Quasi-Z T-Type Grid-Connected Converters
TL;DR: A new method for the detection of an open switch fault using the inverter AC line currents that will be analyzed by a Skewness based method that has the capability to distinguish the switch under fault.
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Modified spwm technique for improved harmonic performance of single pv array fed grid-tied five-level converter
TL;DR: In this paper, a performance assessment of a single photovoltaic array fed transformer-based five-level converter topology with optimal shift factor-based modified sinusoidal pulse width modulation (OSF-MSPWM) technique under a dynamic solar PV environment is presented.
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