Optimization of string size in a large DC windfarm

Ibrahim A. Shehu; Dragan Jovcic; Peng Li

doi:10.1049/icp.2023.1349

Optimization of string size in a large DC windfarm

Ibrahim A. Shehu^*, Dragan Jovcic, Peng Li

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

Abstract

This paper presents a system level comparison between large DC single and multiple string windfarm collection system topologies considering the key operational challenges. With this topology, aerodynamic wake effects across windfarm and generator outage possibilities require the DC output voltages of generators to exceed their ratings. Five different configurations are analysed for a 1GW 640kV test DC windfarm, depending on the number of strings. The configuration with 2 strings and 50 generators in a string was found to be the most optimal configuration with the lowest-cost value and the highest net present value (NPV) of about 528.7 M£. About 42 GWh additional power is achieved compared to a single string configuration of the same rating with 100 generators.

Original language	English
Title of host publication	19th International Conference on AC and DC Power Transmission (ACDC 2023)
Publisher	IEEE Explore
Pages	328-333
Number of pages	6
ISBN (Electronic)	9781839538650
DOIs	https://doi.org/10.1049/icp.2023.1349
Publication status	Published - 25 May 2023
Event	19th International Conference on AC and DC Power Transmission, ACDC 2023 - Glasgow, United Kingdom Duration: 1 Mar 2023 → 3 Mar 2023

Conference

Conference	19th International Conference on AC and DC Power Transmission, ACDC 2023
Country/Territory	United Kingdom
City	Glasgow
Period	1/03/23 → 3/03/23

Keywords

DC voltage control
Energy Curtailment
Large DC windfarms
Offshore wind Series-parallel DC collection system
Topology Optimization

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10.1049/icp.2023.1349Licence: Unspecified

Cite this

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title = "Optimization of string size in a large DC windfarm",

abstract = "This paper presents a system level comparison between large DC single and multiple string windfarm collection system topologies considering the key operational challenges. With this topology, aerodynamic wake effects across windfarm and generator outage possibilities require the DC output voltages of generators to exceed their ratings. Five different configurations are analysed for a 1GW 640kV test DC windfarm, depending on the number of strings. The configuration with 2 strings and 50 generators in a string was found to be the most optimal configuration with the lowest-cost value and the highest net present value (NPV) of about 528.7 M£. About 42 GWh additional power is achieved compared to a single string configuration of the same rating with 100 generators.",

keywords = "DC voltage control, Energy Curtailment, Large DC windfarms, Offshore wind Series-parallel DC collection system, Topology Optimization",

author = "Shehu, {Ibrahim A.} and Dragan Jovcic and Peng Li",

year = "2023",

month = may,

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doi = "10.1049/icp.2023.1349",

language = "English",

pages = "328--333",

booktitle = "19th International Conference on AC and DC Power Transmission (ACDC 2023)",

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note = "19th International Conference on AC and DC Power Transmission, ACDC 2023 ; Conference date: 01-03-2023 Through 03-03-2023",

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T1 - Optimization of string size in a large DC windfarm

AU - Shehu, Ibrahim A.

AU - Jovcic, Dragan

AU - Li, Peng

PY - 2023/5/25

Y1 - 2023/5/25

N2 - This paper presents a system level comparison between large DC single and multiple string windfarm collection system topologies considering the key operational challenges. With this topology, aerodynamic wake effects across windfarm and generator outage possibilities require the DC output voltages of generators to exceed their ratings. Five different configurations are analysed for a 1GW 640kV test DC windfarm, depending on the number of strings. The configuration with 2 strings and 50 generators in a string was found to be the most optimal configuration with the lowest-cost value and the highest net present value (NPV) of about 528.7 M£. About 42 GWh additional power is achieved compared to a single string configuration of the same rating with 100 generators.

AB - This paper presents a system level comparison between large DC single and multiple string windfarm collection system topologies considering the key operational challenges. With this topology, aerodynamic wake effects across windfarm and generator outage possibilities require the DC output voltages of generators to exceed their ratings. Five different configurations are analysed for a 1GW 640kV test DC windfarm, depending on the number of strings. The configuration with 2 strings and 50 generators in a string was found to be the most optimal configuration with the lowest-cost value and the highest net present value (NPV) of about 528.7 M£. About 42 GWh additional power is achieved compared to a single string configuration of the same rating with 100 generators.

KW - DC voltage control

KW - Energy Curtailment

KW - Large DC windfarms

KW - Offshore wind Series-parallel DC collection system

KW - Topology Optimization

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U2 - 10.1049/icp.2023.1349

DO - 10.1049/icp.2023.1349

M3 - Published conference contribution

AN - SCOPUS:85174656171

SP - 328

EP - 333

BT - 19th International Conference on AC and DC Power Transmission (ACDC 2023)

PB - IEEE Explore

T2 - 19th International Conference on AC and DC Power Transmission, ACDC 2023

Y2 - 1 March 2023 through 3 March 2023

ER -

Optimization of string size in a large DC windfarm

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