NDLI: Developing DC Transmission Networks Using DC Transformers

Content Provider	IEEE Xplore Digital Library
Author	Jovcic, D. Ooi, B.T.
Copyright Year	1986
Abstract	This paper studies principles of developing dc transmission grids based on high power dc/dc converters. There has been much research on dc/dc converters and it is likely that some megawatt size units will achieve commercialisation stage soon. In this study, we assume that electronic dc transformers can achieve three functions: 1) voltage stepping, 2) voltage (or power) regulation, and 3) fault isolation. The location, sizing, and control of dc transformers is first analyzed using a simple 4-terminal, 1.8 GW dc grid. It is postulated that this grid would be a better alternative to a point-to-point HVDC. Detailed simulations on PSCAD/EMTDC demonstrate the capability to independently regulate power flow in each dc branch. The simulations of worst case faults on dc lines and ac grids show that dc transformers can isolate the faulted segments enabling the remaining part of the grid to operate normally. The generic principles of developing more complex dc grids with meshed power flows, are also presented. It is concluded that there are no significant technical barriers in developing dc transmission grids but the cost and losses of dc transformers remain as the primary challenges.
Sponsorship	IEEE Power Engineering Society
Starting Page	2535
Ending Page	2543
Page Count	9
File Size	855373
File Format	PDF
ISSN	08858977
Volume Number	25
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transformers HVDC transmission DC-DC power converters Load flow Costs Power conversion Circuit breakers PSCAD EMTDC Propagation losses thyristor converters DC–DC power conversion HVDC transmission control
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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