NDLI: Control strategy of PV-fed, grid-interfaced, seven-level T-type MLI for distributed power generation

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Control strategy of PV-fed, grid-interfaced, seven-level T-type MLI for distributed power generation

Content Provider	IET Digital Library
Author	Sinha, Akanksha Jana, Kartick Chandra Das, Madan Kumar
Abstract	The major concern with renewable sources of energy, feeding the distributed power generation system, is the power quality, reliability and efficiency of the system. This study proposes a novel topology comprising single-phase, seven-level, grid-connected photovoltaic-fed (PV) inverters in parallel. An important expediency of connecting multilevel inverters (MLIs) in parallel is that the failure of any source or the MLI module itself will never stop the overall generation, leading to improved efficiency and reliability of the system. This study also incorporates a novel controller comprising of two DC and an AC controller that independently controls the DC-link voltage of PV system and AC-side voltage so as to inject a pure sinusoidal current at unity power factor into the grid. Also, the AC controller discussed here is self-synchronising, i.e. aloof of phase-locked loop. The power mismatch problem that basically arises due to partial shading conditions in PV system has also been discussed. The MATLAB/Simulink-based proposed two seven-level grid-connected inverters in parallel are modelled and simulation results are presented. An experimental prototype of the PV-fed grid-connected system comprising two seven-level inverters in parallel is developed and tested to validate the simulation results.
Starting Page	3208
Ending Page	3219
Page Count	12
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 12, Oct (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/12
Journal	IET Power Electronics
Publisher Date	2019-07-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Controller AC-side Voltage Control of Electric Power System Control Strategy Controller Comprising DC-link Voltage Distributed Power Generation Distributed Power Generation System Grid-connected Photovoltaic-fed Inverter Grid-interfaced Important Expediency Invertors Maximum Power Point Trackers MLI Module Multilevel Inverter Phase Locked Loop Photovoltaic Power System Power Converter Power Factor Power Generation Control Power Grid Power Mismatch Problem Power Quality Power Supplies to Apparatus Power Supply Quality PV System PV-fed Grid-connected System Comprising PWM Invertors Reliability Seven-level Grid-connected Inverter Seven-level Inverter Solar Power Stations T-type MLI Unity Power Factor
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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