Design of a cooperative voltage harmonic compensation strategy for islanded microgrids combining virtual admittance and repetitive controller

Blanco, Cristian and Tardelli, Francesco and Reigosa, David and Zanchetta, Pericle and Briz, Fernando (2016) Design of a cooperative voltage harmonic compensation strategy for islanded microgrids combining virtual admittance and repetitive controller. In: 2016 IEEE Energy Conversion Congress and Exposition (ECCE), 18-22 September 2016, Milwaukee, USA.

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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 recently 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. 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.

Item Type: Conference or Workshop Item (Paper)
Keywords: central controller, harmonic compensation, nonlinear loads, repetitive controller, resonant controller, virtual admittance
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
Depositing User: Burns, Rebecca
Date Deposited: 28 Jun 2017 13:45
Last Modified: 12 Oct 2017 23:51
URI: http://eprints.nottingham.ac.uk/id/eprint/43813

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