Paper Info
Title
Harmonic Voltage Control in Distributed Generation Systems Using Optimal Switching Vector Strategy
Abstract
With increased penetration of renewable power and the nonlinear loads in the distributed generation (DG) systems, increased power quality concerns are exhibited in the active distribution networks, especially the challenges associated with the current and voltage harmonics in the system. Various conventional harmonic compensation techniques are developed for <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">voltage-controlled</i> DG inverters in past, majority involve either multiple proportional-integral (PI) or proportional-resonant (PR) controllers in eliminating grid current harmonics. The <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">current-controlled</i> inverters, on the other hand, are not preferred in industrial applications, accounting to their wide variations in the switching frequency. A novel and adaptive harmonic voltage control is developed here, for <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">voltage-controlled</i> DG inverters, which neither uses any PI regulators nor imposes stability issues associated with nonideal implementation of infinite gains of PR controllers. Interestingly, the developed control logic can be used for DG inverters, both in grid-connected and off-grid operational modes. Furthermore, this strategy allows a network operator to use this as an additional supplement that can be enabled/disabled as per the network requirement. The control logic exploits the property of an optimal-switching-vector controller, i.e., accurate output voltage tracking. Simulations results demonstrate the effectiveness of the controller, to suppress grid current harmonics and load voltage harmonics in grid-interfaced (GI) and off-grid modes, respectively, ultimately satisfying the mandatory IEEE standard-1547. Experimental results verify the viability of the controller for practical applications.
Year
DOI
Venue
2022
10.1109/JSYST.2021.3070498
IEEE Systems Journal
Keywords
DocType
Volume
Distributed generation (DG),harmonics,optimal-switching-vector (OSV) control and voltage source inverter (VSI),power quality
Journal
16
Issue
ISSN
Citations 
2
1932-8184
0
PageRank 
References 
Authors
0.34
8
4
Name
Order
Citations
PageRank
Vedantham LakshmiSrinivas100.34
Bhim Singh200.34
Sukumar Mishra300.34
Lie Xu400.34