Flexible Compensation of Voltage and Current Unbalance and Harmonics in Microgrids

Seyyed Yousef Mousazadeh Mousavi, Alireza Jalilian, Mehdi Savaghebi and Josep M. Guerrero
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Seyyed Yousef Mousazadeh Mousavi: Department of Electrical Engineering, Iran University of Science and Technology, Tehran 16846-13114, Iran
Alireza Jalilian: Department of Electrical Engineering, Iran University of Science and Technology, Tehran 16846-13114, Iran
Mehdi Savaghebi: Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark
Josep M. Guerrero: Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark

Energies, 2017, vol. 10, issue 10, 1-19

Abstract: In recent years, the harmonics and unbalance problems endanger the voltage and current quality of power systems, due to increasing usage of nonlinear and unbalanced loads. Use of Distributed Generation (DG)-interfacing inverters is proposed for voltage or current compensation. In this paper, a flexible control method is proposed to compensate voltage and current unbalance and harmonics using the distributed generation (DG)-interfacing inverters. This method is applicable to both grid-connected and islanded Microgrids (MGs). In the proposed method, not only the proper control of active and reactive powers can be achieved, but also there is flexibility in compensating the voltage or current quality problems at DG terminals or Points of Common Coupling (PCCs). This control strategy consists of active and reactive power controllers and a voltage/current quality-improvement block. The controller is designed in a stationary ( ?? ) frame. An extensive simulation study has been performed and the results demonstrate the effectiveness of the proposed control scheme. Depending on the compensation modes, the harmonics and unbalance compensation of DG output current, MG-injected current to the grid, as well as PCC and DG voltages, can be achieved in grid-connected operation of MG while in the islanded operation, and the PCC and DG voltages compensation can be obtained through the proposed control scheme.

Keywords: Distributed Generation (DG); DG-interfacing inverter; microgrid; power quality (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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