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Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation

Quan Huy Nguyen, Grazia Todeschini, Surya Santoso

IEEE Transactions on Power Systems, Volume: 34, Issue: 4, Pages: 1 - 1

Swansea University Author: Grazia Todeschini

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DOI (Published version): 10.1109/TPWRS.2019.2896023

Abstract

This paper proposes a novel power flow formulation and solution algorithm for a generalized large-scale interconnected transmission system encompassing multi-frequency HVac and HVdc grids having arbitrary numbers of buses, topologies, and operating frequencies. Back-to-back and ac/dc voltage-source...

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Published in: IEEE Transactions on Power Systems
ISSN: 0885-8950 1558-0679
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa48720
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first_indexed 2019-02-06T14:04:24Z
last_indexed 2020-08-07T03:14:30Z
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spelling 2020-08-06T14:47:04.5783265 v2 48720 2019-02-06 Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation c4ff9050b31bdec0e560b19bfb3b56d3 Grazia Todeschini Grazia Todeschini true false 2019-02-06 FGSEN This paper proposes a novel power flow formulation and solution algorithm for a generalized large-scale interconnected transmission system encompassing multi-frequency HVac and HVdc grids having arbitrary numbers of buses, topologies, and operating frequencies. Back-to-back and ac/dc voltage-source converters are employed to interconnect and control the voltage and power interchange between two power grids operating at different frequencies. The power flow formulation is based on a steady-state model of back-to-back and ac/dc converters operated in centralized and distributed droop control strategies. Each power grid is represented by a set of nonlinear power balance equations. These equations are solved simultaneously using a unified power flow algorithm, taking into account generator and converter limits. It is shown that the solution convergence is achieved rapidly despite the system size, topology, and converter control strategies. The efficacy and accuracy of the proposed steady-state solution algorithm are demonstrated by comparing the numerical solution to the one obtained by time-domain electromagnetic models of multi-frequency HVac and HVdc transmission systems with fully controllable back-to-back and ac/dc converters. The results obtained by using the proposed algorithm and the time-domain simulation are practically identical. Journal Article IEEE Transactions on Power Systems 34 4 1 1 0885-8950 1558-0679 31 12 2019 2019-12-31 10.1109/TPWRS.2019.2896023 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2020-08-06T14:47:04.5783265 2019-02-06T11:59:21.3324349 Quan Huy Nguyen 1 Grazia Todeschini 2 Surya Santoso 3 48720__17606__9013ae6dd3d544afb282b5910254deeb.pdf nguyen2019searchable.pdf 2020-06-30T14:32:54.4815721 Output 2313854 application/pdf Accepted Manuscript true true
title Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation
spellingShingle Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation
Grazia Todeschini
title_short Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation
title_full Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation
title_fullStr Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation
title_full_unstemmed Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation
title_sort Power Flow in a Multi-Frequency HVac and HVdc System: Formulation, Solution, and Validation
author_id_str_mv c4ff9050b31bdec0e560b19bfb3b56d3
author_id_fullname_str_mv c4ff9050b31bdec0e560b19bfb3b56d3_***_Grazia Todeschini
author Grazia Todeschini
author2 Quan Huy Nguyen
Grazia Todeschini
Surya Santoso
format Journal article
container_title IEEE Transactions on Power Systems
container_volume 34
container_issue 4
container_start_page 1
publishDate 2019
institution Swansea University
issn 0885-8950
1558-0679
doi_str_mv 10.1109/TPWRS.2019.2896023
document_store_str 1
active_str 0
description This paper proposes a novel power flow formulation and solution algorithm for a generalized large-scale interconnected transmission system encompassing multi-frequency HVac and HVdc grids having arbitrary numbers of buses, topologies, and operating frequencies. Back-to-back and ac/dc voltage-source converters are employed to interconnect and control the voltage and power interchange between two power grids operating at different frequencies. The power flow formulation is based on a steady-state model of back-to-back and ac/dc converters operated in centralized and distributed droop control strategies. Each power grid is represented by a set of nonlinear power balance equations. These equations are solved simultaneously using a unified power flow algorithm, taking into account generator and converter limits. It is shown that the solution convergence is achieved rapidly despite the system size, topology, and converter control strategies. The efficacy and accuracy of the proposed steady-state solution algorithm are demonstrated by comparing the numerical solution to the one obtained by time-domain electromagnetic models of multi-frequency HVac and HVdc transmission systems with fully controllable back-to-back and ac/dc converters. The results obtained by using the proposed algorithm and the time-domain simulation are practically identical.
published_date 2019-12-31T03:59:19Z
_version_ 1763753024485851136
score 10.999161

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