Design of a cooperative voltage harmonic compensation strategy for islanded microgrids combining virtual admittance and Repetitive Controller

Blanco, Cristian; Tardelli, Francesco; Diaz, David; Zanchetta, Pericle; Briz, Fernando

Abstract

Non-linear loads (NLLs) in three-phase systems are
known to produce current harmonics at -5, 7, -11, 13… times the
fundamental frequency; harmonics of the same frequencies are
induced in microgrid voltage, reducing therefore the power
quality. Dedicated equipment like active power filters can be used
to compensate the microgrid harmonics; alternatively, each
distributed generation (DG) unit present in the microgrid can be
potentially used to compensate for those harmonics. The use of the
virtual admittance concept combined with a PI-RES control
structure has been previously proposed as a harmonic
compensation sharing strategy when multiple DGs operate in
parallel. The drawback of this methodology is that a large number
of RES controllers might be required to compensate for all
harmonic components induced by NLLs, increasing the tuning
complexity as well as the execution time. This paper proposes the
combined use of virtual admittance control loop and repetitive
controller (RC) for harmonic compensation. The main advantage
of the proposed method is that only one RC is required to
compensate for all the harmonic components, significantly
reducing the computational burden and the design complexity.
The dynamic performance of the whole system is tested under
variable NLL.

Citation

Blanco, C., Tardelli, F., Diaz, D., Zanchetta, P., & Briz, F. (2018). Design of a cooperative voltage harmonic compensation strategy for islanded microgrids combining virtual admittance and Repetitive Controller. IEEE Transactions on Industry Applications, 55(1), 680-688. https://doi.org/10.1109/tia.2018.2868691

• Journal Article Type: Article
• Acceptance Date: Aug 28, 2018
• Online Publication Date: Sep 5, 2018
• Publication Date: Oct 1, 2018
• Deposit Date: Oct 8, 2018
• Publicly Available Date: Oct 8, 2018
• Journal: IEEE Transactions on Industry Applications
• Print ISSN: 0093-9994
• Electronic ISSN: 1939-9367
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 55
• Issue: 1
• Pages: 680-688
• DOI: https://doi.org/10.1109/tia.2018.2868691
• Keywords: Control and Systems Engineering; Electrical and Electronic Engineering; Industrial and Manufacturing Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/1151518
• Publisher URL: https://ieeexplore.ieee.org/document/8454860
• Additional Information: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.