Smart Inverter Stability Enhancement in Weak Grids Using Adaptive Virtual-Inductance

Aswad Adib; Fariba Fateh; Behrooz Mirafzal

doi:10.1109/TIA.2020.3034070

Smart Inverter Stability Enhancement in Weak Grids Using Adaptive Virtual-Inductance

Aswad Adib, Fariba Fateh, Behrooz Mirafzal

Grid Systems Architecture

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

An adaptive virtual-inductance feedforward scheme is presented in this article to enhance the stable operation of smart inverters in weak grids. In the developed scheme, the virtual inductance is updated in real time according to an adaptation law to ensure that the inverter follows the dynamic response of a robust reference model, thereby ensuring stability without the need for any grid impedance estimation. In this article, the developed scheme is validated with experimental results obtained from testing a small-scale two-level, 208-V, 2-kW inverter.

Original language	English
Article number	9240054
Pages (from-to)	814-823
Number of pages	10
Journal	IEEE Transactions on Industry Applications
Volume	57
Issue number	1
DOIs	https://doi.org/10.1109/TIA.2020.3034070
State	Published - Jan 1 2021

Funding

Manuscript received January 9, 2020; revised July 3, 2020, September 2, 2020, and October 12, 2020; accepted October 20, 2020. Date of publication October 26, 2020; date of current version December 31, 2020. Paper 2020-SECSC-0012.R3, presented at the 2019 IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, MD, USA, Sep. 29–Oct. 3, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Renewable and Sustainable Energy Conversion Systems Committee of the IEEE Industry Applications Society. This work was supported by the Department of Energy, Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office, under Award Number DE-EE0008767. (Corresponding author: Fariba Fateh.) Fariba Fateh and Behrooz Mirafzal are with the Electrical and Computer Engineering Department,Kansas State University, Manhattan KS 66506 USA (e-mail: [email protected]; [email protected]).

Funders	Funder number
U.S. Department of Energy
Office of Energy Efficiency and Renewable Energy
Solar Energy Technologies Office	DE-EE0008767

Keywords

Adaptive virtual-inductance
feedforward controller
grid-following
smart inverter
weak grids

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abstract = "An adaptive virtual-inductance feedforward scheme is presented in this article to enhance the stable operation of smart inverters in weak grids. In the developed scheme, the virtual inductance is updated in real time according to an adaptation law to ensure that the inverter follows the dynamic response of a robust reference model, thereby ensuring stability without the need for any grid impedance estimation. In this article, the developed scheme is validated with experimental results obtained from testing a small-scale two-level, 208-V, 2-kW inverter.",

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Smart Inverter Stability Enhancement in Weak Grids Using Adaptive Virtual-Inductance

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