NDLI: Novel voltage balancing algorithm for single-phase cascaded multilevel inverter for post-module failure operation in solar photovoltaic applications

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Volume 13 (2019) : Issue 2, Feb

Volume 13 (2019) : Issue 1, Jan

IET Science, Measurement & Technology

IET Signal Processing

IET Wireless Sensor Systems

Micro & Nano Letters

The Journal of Engineering

Novel voltage balancing algorithm for single-phase cascaded multilevel inverter for post-module failure operation in solar photovoltaic applications

Content Provider	IET Digital Library
Author	Rahman, Syed Meraj, Mohammad Iqbal, Atif Brahim, Lazhar Ben
Abstract	Four cascaded quasi-impedance source inverter (qZSI) modules are required for achieving nine-level output voltage waveform. In case of one module failure, number of levels in output voltage are reduced to seven. This leads to decrease in the output voltage magnitude and increased THD (higher than conventional seven-level qZSI). This is due to the dominance of unwanted harmonic component introduced in the harmonic spectrum. To restore voltage magnitude and optimize THD performance, novel voltage balancing algorithm is proposed. To validate the control algorithm for off-grid and grid connected system, simulation results of the multilevel qZSI are discussed in two categories: (i) DC voltage source powered multilevel qZSI for RL load subjected to module failure and (ii) solar powered multilevel qZSI connected to utility grid subjected to module failure and variable solar irradiation. Pre-fault and post-fault performance of the system with the proposed control algorithm is discussed for both categories, which validates the effectiveness of the algorithm. Hardware results for proof-of-concept are discussed for DC voltage source fed cascaded qZSI connected to RL load during pre-fault and post-fault conditions. FPGA Virtex-5 is used for hardware implementation of the control algorithm. The results validate the improvement in output voltage both quantitatively and qualitatively.
Starting Page	427
Ending Page	437
Page Count	11
ISSN	17521416
Volume Number	13
e-ISSN	17521424
Issue Number	Issue 3, Feb (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/13/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2018.5483
Journal	IET Renewable Power Generation
Publisher Date	2018-11-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Boost Modes Buck Mode Cascaded QZSI CHB Inverters Control Algorithm Control of Electric Power System Conventional Cascaded H-bridge Inverters DC Voltage Source DC Voltage Source Powered Multilevel QZSI Failure Analysis FPGA Virtex 5 Digital Platform Harmonic Distortion Harmonic Profile Harmonic Spectrum Module Failure Multilevel Inverter Operation Nine-level Four Module QZSI Nine-level Output Voltage Waveform Novel Voltage Balancing Algorithm Output Voltage Level Output Voltage Magnitude Photovoltaic Power System Post-fault Condition Post-fault Operation Restoration Post-fault Performance Post-module Failure Operation Power Generation Control Power Generation Fault Power Generation Reliability Power Grid Pre-fault Condition Pre-fault Performance PWM Invertors Reliability RL Load Seven-level QZSI Output Voltage Seven-level Three Module Single-phase Cascaded Multilevel Inverter Single-phase Cascaded Quasiimpedance Source Inverter Module Solar Photovoltaic Application Solar Power Stations Solar Powered Multilevel QZSI Switching Converter Total Harmonic Distortion Unwanted Harmonic Component Utility Grid Voltage Balancing Algorithm Voltage Level Voltage-source Converter
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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