NDLI: Voltage unbalance and harmonics compensation for islanded microgrid inverters

Content Provider	IET Digital Library
Author	Liu, Quanwei Tao, Yong Liu, Xunhao Deng, Yan He, Xiangning
Abstract	Voltage source inverters (VSIs) are usually used for all kinds of distributed generation interfaces in a microgrid. It is the microgrid's superiority to power the local loads continuously when the utility fails. When in islanded mode, the voltage and frequency of the microgrid are determined by the VSIs; therefore the power quality can be deteriorated under unbalanced and non-linear loads. A voltage unbalance and harmonics compensation strategy for the VSIs in islanded microgrid is proposed in this study. This method is implemented in a single synchronous reference frame (SRF) and is responsible for both the voltage unbalance and harmonic compensation. Furthermore, the virtual impedance loop is modified to improve the compensation effect. The impedance model of the VSI is built to explain the compensation ability of the proposed strategy. The whole control system mainly includes power droop controllers, a modified virtual impedance loop and inner SRF-based voltage unbalance and harmonics compensators. The proposed strategy is demonstrated in detail and validated with simulations and experiments.
Starting Page	1055
Ending Page	1063
Page Count	9
ISSN	17554535
Volume Number	7
e-ISSN	17554543
Issue Number	Issue 5, May (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/7/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0410
Journal	IET Power Electronics
Publisher Date	2013-11-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Distributed Generation Interfaces Distributed Power Generation Harmonics Harmonics Compensation Invertors Islanded Microgrid Inverter Power Converter Power Droop Controller Power Quality Power Supplies to Apparatus Power Supply Quality Power System Harmonics Single Synchronous Reference Frame Virtual Impedance Loop Voltage Source Inverter Voltage Unbalance
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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