The DVR-AC, a novel structure for mitigating large voltage sags and swells using voltage re-injection

Voltage sags, swells and harmonic distortion are three of the more representative PQ events in distribution grids. For mitigating such events various AC-AC- and AC-link structures has been proposed over the years with greater or lesser success for ameliorating large voltage deviation events. This pa...

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Bibliographic Details
Published in2011 North American Power Symposium pp. 1 - 6
Main Authors Santoyo Anaya, M. A., Moreno Goytia, E. L., Rodriguez, J. R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2011
Subjects
Equations
Mathematical model
Matrix converters
Power quality
Topology
Voltage control
Voltage fluctuations
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Summary:Voltage sags, swells and harmonic distortion are three of the more representative PQ events in distribution grids. For mitigating such events various AC-AC- and AC-link structures has been proposed over the years with greater or lesser success for ameliorating large voltage deviation events. This paper introduces the DVR-AC (Dynamic Voltage Restorer Alternate Current), a novel power electronics-based structures alternative option for mitigating short and long standing voltage swell and sags with large magnitude deviations from nominal. The solution is based upon an AC input 2×2 matrix converter whose output voltage is injected to the grid through a series transformer. The magnitude control of the injected voltage, based on PWM, is clearly explained. The cases of study results evidence the advantages of the DVR-AC respective to other techniques and topologies.
ISBN:9781457704178
145770417X
DOI:10.1109/NAPS.2011.6025104