NDLI: Reconnection of micro-grid from islanded mode to grid-connected mode used sliding Goertzel transform based filter

Content Provider	IET Digital Library
Author	Zeng, Zheng Shao, Weihua
Abstract	The micro-grid is a key interface between renewable energy sources and the utility. A micro-grid can work under islanded mode or grid-connected mode. To confirm the seamless transform of a micro-grid from islanded mode to grid-connected mode, synchronisation of the islanded micro-grid to the utility is an essential challenge. In this study, replacing first-order low-pass filter by sliding Goertzel transform based filter, a control strategy with an extended phase-locked loop is presented for the inverter applications in islanded micro-grids. It can ensure the synchronisation between the micro-grid voltage and the utility voltage, and guarantee the seamless reconnection of the micro-grid from islanded mode to grid-connected mode. Considering the influence of the voltage deviation between the micro-grid and the utility voltages in the synchronisation process, detailed analyses are proposed. Analytical non-linear model and small-signal model are presented to prove the fast and effective reconnect performance. Simulated and experimental results are provided to verify the validity and effectiveness of the proposed control strategy. This study is of interest for the seamless transform control of islanded micro-grids.
Starting Page	1041
Ending Page	1048
Page Count	8
ISSN	17521416
Volume Number	11
e-ISSN	17521424
Issue Number	Issue 7, Jun (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/11/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2016.0932
Journal	IET Renewable Power Generation
Publisher Date	2017-04-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analytical Nonlinear Model Demodulator Discriminators And Mixers Distributed Power Generation Extended Phase-locked Loop Filter And Other Network Firstorder Low-pass Filter Grid-connected Mode Inverter Application Invertors Islanded Mode Low-pass Filter Microgrid System Modulator Phase Locked Loop Power Electronics Power Generation Fault Power Supply Renewable Energy Source Seamless Transform Control Sliding Goertzel Transform Based Filter Small-signal Model Supervisory Circuit Synchronisation Synchronisation Process Voltage Deviation
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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