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Control strategy of three-phase photovoltaic inverter under low-voltage ride-through condition
Wang X.1; Yang Z.1; Fan B.2; Xu W.1
2015
Source PublicationMathematical Problems in Engineering
ISSN15635147 1024123X
Volume2015
Abstract

The new energy promoting community has recently witnessed a surge of developments in photovoltaic power generation technologies. To fulfill the grid code requirement of photovoltaic inverter under low-voltage ride-through (LVRT) condition, by utilizing the asymmetry feature of grid voltage, this paper aims to control both restraining negative sequence current and reactive power fluctuation on grid side to maintain balanced output of inverter. Two mathematical inverter models of grid-connected inverter containing LCL grid-side filter under both symmetrical and asymmetric grid are proposed. PR controller method is put forward based on inverter model under asymmetric grid. To ensure the stable operation of the inverter, grid voltage feedforward method is introduced to restrain current shock at the moment of voltage drop. Stable grid-connected operation and LVRT ability at grid drop have been achieved via a combination of rapid positive and negative sequence component extraction of accurate grid voltage synchronizing signals. Simulation and experimental results have verified the superior effectiveness of our proposed control strategy.

DOI10.1155/2015/790584
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Mathematics
WOS SubjectEngineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications
WOS IDWOS:000366424500001
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Citation statistics
Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorYang Z.
Affiliation1.Universidade de Macau
2.Henan University of Science and Technology
Recommended Citation
GB/T 7714
Wang X.,Yang Z.,Fan B.,et al. Control strategy of three-phase photovoltaic inverter under low-voltage ride-through condition[J]. Mathematical Problems in Engineering,2015,2015.
APA Wang X.,Yang Z.,Fan B.,&Xu W..(2015).Control strategy of three-phase photovoltaic inverter under low-voltage ride-through condition.Mathematical Problems in Engineering,2015.
MLA Wang X.,et al."Control strategy of three-phase photovoltaic inverter under low-voltage ride-through condition".Mathematical Problems in Engineering 2015(2015).
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