NDLI: Microgrid operation improvement by adaptive virtual impedance

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Microgrid operation improvement by adaptive virtual impedance

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Volume 13 (2019) : Issue 1, Jan

IET Science, Measurement & Technology

IET Signal Processing

IET Wireless Sensor Systems

Micro & Nano Letters

The Journal of Engineering

Microgrid operation improvement by adaptive virtual impedance

Content Provider	IET Digital Library
Author	Eskandari, Mohsen Li, Li
Abstract	Microgrids (MGs) are regarded as the best solution for optimal integration of the renewable energy sources into power systems. However, novel control strategies should be developed because of the distinct inherent feature of MG components in comparison to conventional power systems. Although the droop-based control method is adopted in the MG to share power among distributed generation units, its dependency to grid parameters makes its implementation not as convenient as that in conventional power systems. Virtual impedance has been proposed as the complementary part of droop control in MGs. In this study, adaptive virtual impedance is designed considering its effects on the system performance in the MG including: (i) decoupling active and reactive power control by making the grid X/R ratio high, (ii) maximum transferable power through the feeder, (iii) stability concern and (iv) precise reactive power sharing in different operating modes as well as smooth transition from connected mode to islanded mode (IM). To this end, a novel method is proposed to determine the reactive power reference of distributed generation (DG) units according to their contribution in reactive power sharing in IM. In addition, simulation in MATLAB/Simulink environment is conducted to assess the performance of the control system.
Starting Page	296
Ending Page	307
Page Count	12
ISSN	17521416
Volume Number	13
e-ISSN	17521424
Issue Number	Issue 2, Feb (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/13/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2018.5303
Journal	IET Renewable Power Generation
Publisher Date	2018-10-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Power Control Decoupling Adaptive Virtual Impedance Control of Electric Power System Distributed Generation Units Distributed Power Generation Droop-based Control Method Grid Parameter Grid X-R Ratio Islanded Mode MATLAB-Simulink Environment Maximum Transferable Power Microgrid Operation Improvement Optimal Renewable Energy Source Integration Power And Energy Control Power Generation Control Power Grid Power System Power System Control Power System Stability Precise Reactive Power Sharing Reactive Power Control Reactive Power Control Decoupling Stability Concern Stability in Control Theory
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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Microgrid operation improvement by adaptive virtual impedance

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