NDLI: A protection strategy for micro-grids based on positive-sequence component

Content Provider	IET Digital Library
Author	Mirsaeidi, Sohrab Said, Dalila Mat Mustafa, Mohammad Wazir Habibuddin, Mohammad Hafiz
Abstract	In recent years, the concept of micro-grid has appeared as an appropriate way for the integration of distributed energy resources (DERs) in the distribution networks. However, micro-grids have encountered a number of challenges from control and protection aspects. One of the main issues relevant to the protection of micro-grids is to develop a suitable protection technique which is effective in both grid-connected and stand-alone operation modes. This study presents a micro-grid protection scheme based on positive-sequence component using phasor measurement units and designed microprocessor-based relays (MBRs) along with a digital communication system. The proposed scheme has the ability to protect radial and looped micro-grids against different types of faults with the capability of single-phase tripping. Furthermore, since the MBRs are capable of updating their pickup values (upstream and downstream equivalent positive-sequence impedances of each line) after the first change in the micro-grid configuration (such as transferring from grid-connected to islanded mode and or disconnection of a line, bus or DER either in grid-connected mode or in islanded mode), they can protect micro-grid lines and buses against subsequent faults. Finally, in order to verify the effectiveness of the suggested scheme and the designed MBR, several simulations have been undertaken using DIgSILENT PowerFactory and MATLAB software packages.
Starting Page	600
Ending Page	609
Page Count	10
ISSN	17521416
Volume Number	9
e-ISSN	17521424
Issue Number	Issue 6, Aug (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/9/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2014.0255
Journal	IET Renewable Power Generation
Publisher Date	2015-03-02
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Digital Communication System Distributed Power Generation Distribution Network Grid Connected Operation Mode Islanded Mode Microgrid Protection Strategy Microprocessor Based Relay Microprocessor Chips Phasor Measurement Phasor Measurement Unit Positive Sequence Component Power Distribution Fault Power Distribution Protection Power Generation Protection Power System Measurement And Metering Power System Protection Relay Protection Single Phase Tripping Stand Alone Operation Mode
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
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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