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access icon free Secondary-control-based harmonics compensation scheme for voltage- and current-controlled inverters in islanded microgrids

  • Author(s): Seyyed Yousef Mousazadeh Mousavi 1 ; Alireza Jalilian 2, 3 ; Mehdi Savaghebi 4 ; Josep M. Guerrero 5
    • View affiliations
  • Source: Volume 14, Issue 12, 07 September 2020, p. 2176 – 2182
    DOI:  10.1049/iet-rpg.2019.0782 , Print ISSN 1752-1416, Online ISSN 1752-1424
© The Institution of Engineering and Technology
Received 30/06/2019, Accepted 08/06/2020, Revised 28/01/2020, Published 10/06/2020

In this study, a coordinated control scheme is proposed for sharing harmonics compensation effort among voltage and current controlled mode (VCM and CCM) inverters in islanded microgrids. In this method, the voltage harmonics compensation of sensitive bus (SB) is achieved by using secondary control as well as virtual impedance and admittance loops in primary control of VCM and CCM units. The limited capacity of the inverter is taken into account for harmonics compensation. Photovoltaic (PV) systems are considered as CCM units. The harmonics compensation is mainly performed by VCM inverters. However, in order to prevent these units from overloading, the PV interfacing inverters (CCM units) are called to collaborate in harmonics compensation whenever needed. The results of simulation study in Matlab/Simulink show the effectiveness of this method in coordination of CCM and VCM units.

Inspec keywords: invertors; power conversion harmonics; photovoltaic power systems; electric current control; voltage control; distributed power generation; power generation control

Other keywords: coordinated control scheme; photovoltaic systems; admittance loops; current controlled mode; voltage harmonics compensation; PV systems; voltage-controlled inverters; Matlab-Simulink; primary control; sensitive bus; secondary-control-based harmonics compensation scheme; current-controlled inverters; islanded microgrids; virtual impedance; CCM units; VCM inverters; secondary control; PV interfacing inverters

Subjects: Current control; DC-AC power convertors (invertors); Solar power stations and photovoltaic power systems; Power electronics, supply and supervisory circuits; Voltage control; Distributed power generation; Control of electric power systems

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