NDLI: Power quality improvement in a low-voltage DC ceiling grid powered system

Content Provider	IET Digital Library
Author	Nallusamy, Subashini Velayutham, Dharmalingam Govindarajan, Uma Parvathyshankar, Deivasundari
Abstract	Power quality is an important issue in low-voltage DC (LVDC) grids which drives light-emitting diode lighting system and many other DC loads in residential applications. The requirement of high-quality power to the lighting system necessitates power factor correction (PFC). This study presents a three-phase modular AC-to-DC converter with a simple controller for PFC in LVDC grids under balanced and unbalanced supply voltage conditions. The proposed circuit consists of three separate single-phase boost converter modules. Each module includes a diode rectifier at the front end, followed by a boost converter. The main advantage of this converter is module loss operation where the DC supply given to the lighting system and other DC loads will be continued even in case of failure of one module. The 24 V DC output voltage is regulated using an outer proportional-integral controller and the input current wave shape in each phase is improved by three individual hysteresis controllers. The controller works successfully in tracking the reference voltage changes in order to vary the regulated DC output voltage. The effectiveness of the controller has been verified by the results obtained through MATLAB/SIMULINK. A prototype model has been developed to validate this system and tested using dSPACE1104 processor.
Starting Page	1902
Ending Page	1911
Page Count	10
ISSN	17554535
Volume Number	8
e-ISSN	17554543
Issue Number	Issue 10, Oct (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/8/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2014.0715
Journal	IET Power Electronics
Publisher Date	2015-05-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC-DC Power Converter Balanced Supply Voltage Condition Control of Electric Power System Current Wave Shape Current Waveform DC Load DC Output Voltage Regulation Diode Rectifier DSPACE1104 Processor Equal Current Criteria Harmonic Distortion Hysteresis Hysteresis Controller Instantaneous Symmetrical Component Theory LED Lighting System Light Emitting Diode Lighting Load Variation Low-voltage DC Ceiling Grid Powered System Low-voltage DC Grid LVDC Grid PFC PI Control Power Electronics Power Factor Correction Power Grid Power Quality Improvement Power Supply Power Supply Quality Power System Economics Power System Managemen Power System Operation Proportional-integral Controller Rectifying Circuit Reference Current Template Generation Residential Application Single Phase Boost Converter Module Sinusoidal Voltage Supervisory Circuit Three Phase Modular AC-DC Converter Total Harmonic Distortion Unbalanced Supply Voltage Condition Unity Power Factor Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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