NDLI: Graph-theoretic-based approach for solving load flow problem of AC–DC radial distribution network with distributed generations

Content Provider	IET Digital Library
Author	Murari, Krishna Padhy, Narayana Prasad
Abstract	Owing to the rising power demand, depleting conventional energy sources and recent advancement in incorporating deeper injections of renewable energy resources into the grid, the existing distribution system will have to take into account DC injections/withdrawals, thus giving rise to AC-DC distribution system. The load-flow in the aforementioned systems is an exigent task because of the presence of power converters. This work presents a novel and computationally efficient load-flow algorithm for AC–DC radial distribution network utilizing the notion of graph-theory with matrix-algebra. The remarkable trait of the proposed methodology lies in the formulation of path impedance matrix, loads beyond branch matrix, path drop matrix, slack bus to other buses drop matrix and load flow matrix which will remain unaffected for the entire load-flow operation. The per-unit equivalent model of power converters has been developed for solving load-flow equations in per-unit. Various models of distributed generations are also incorporated in the proposed load-flow study. The developed method is capable of addressing the aforementioned modeling challenges. The proposed technique has been tested on several AC–DC test networks that include different operating modes of power converters and various models of DGs, which proves feasibility and legitimacy of the proposed technique.
Starting Page	5327
Ending Page	5346
Page Count	20
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 22, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/22
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.1416
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-07-08
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC–DC Distribution System AC–DC Load-flow Equations AC–DC Radial Distribution Network AC–DC Test Networks Aforementioned System Branch Matrix Buses Drop Matrix Computationally Efficient Load-flow Algorithm Conventional Energy Sources Distributed Generations Distributed Power Generation Distribution Network Entire Load-flow Operation Existing Distribution System Graph-theoretic-based Approach Load Flow Load Flow Matrix Load Flow Problem Matrix Algebra Matrix-algebra Optimisation Technique Path Drop Matrix Path Impedance Matrix Power Converter Power System Economics Power System Managemen Power System Operation Renewable Energy ReSource Rising Power Demand
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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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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