DocumentCode :
3729859
Title :
Modeling and control strategy of a single-phase Uninterruptible Power Supply (UPS)
Author :
Dante Inga Narvaez;Marcelo Gradella Villalva
Author_Institution :
Department of Energy Systems (DSE), University of Campinas (UNICAMP), Brazil
fYear :
2015
Firstpage :
355
Lastpage :
360
Abstract :
The objective of this work is to get an understandable model of a single-phase Uninterruptible Power Supply (UPS), as well as design and verify the controllers for the UPS. To make the procedure more comprehensive, a basic single-phase UPS is proposed, so it is formed by a battery bank and a bidirectional full-bridge converter (with LC filter and transformer included). The single-phase full-bridge converter is modeled by deducing its transfer functions in two operational modes: voltage-controlled (stand-alone mode, to supply power to the load) and current-controlled (grid-tie mode, to charge the battery). Then, the controllers are designed by using the frequency-analysis approach, so the parameters of PI and PI+ressonant controllers are calculated as examples. External components such as the grid and the load are modeled in a simple way as well. The PSIM software is used to verify and compare the operation of the controllers through simulations, also being able to generate C code to implement the controller into a Digital Signal Processor (DSP). In addition, the models and controller design method can be re-utilized in simulations of other types of UPS and elements of a distributed microgrid.
Keywords :
"Uninterruptible power systems","Batteries","Voltage control","Load modeling","Modulation","Integrated circuit modeling"
Publisher :
ieee
Conference_Titel :
Innovative Smart Grid Technologies Latin America (ISGT LATAM), 2015 IEEE PES
Type :
conf
DOI :
10.1109/ISGT-LA.2015.7381181
Filename :
7381181
Link To Document :
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