Offshore wind farm cluster-based DC collection network: operation and design considerations

Douglas W. Elliott; Catherine E. Jones; Stephen Jon Finney

doi:10.1049/etr.2014.0019

Offshore wind farm cluster-based DC collection network: operation and design considerations

Douglas W. Elliott, Catherine E. Jones, Stephen Jon Finney

Electronic And Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A direct current (DC) cluster-based wind farm collection network with permanent magnet generators and passive rectifiers is described and modelled. The ability of the generator speed to ‘slip’ from the cluster synchronous speed is discussed along with the relationship between the slip and generator stator inductances. An investigation of the harmonics present in the system highlights the presence of sixth harmonic torque and DC current components. Modelling of two and five turbine clusters indicates that the super position of the sixth harmonics produced by adjacent turbines, introduces a lower frequency harmonic components to both the DC current and generator torques. Modelling also highlights the presence of circulating current components flowing between the turbines, which give rise to both transient and steady-state interactions. Finally, the impact of increasing the branch inductances is studied and shown to affect the response of the machines following changes of wind speed.

Original language	English
Number of pages	8
Journal	Engineering and Technology Reference
DOIs	https://doi.org/10.1049/etr.2014.0019
Publication status	Published - 5 Nov 2014

Keywords

cluster based wind farms
wind energy
turbines

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10.1049/etr.2014.0019

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title = "Offshore wind farm cluster-based DC collection network: operation and design considerations",

abstract = "A direct current (DC) cluster-based wind farm collection network with permanent magnet generators and passive rectifiers is described and modelled. The ability of the generator speed to {\textquoteleft}slip{\textquoteright} from the cluster synchronous speed is discussed along with the relationship between the slip and generator stator inductances. An investigation of the harmonics present in the system highlights the presence of sixth harmonic torque and DC current components. Modelling of two and five turbine clusters indicates that the super position of the sixth harmonics produced by adjacent turbines, introduces a lower frequency harmonic components to both the DC current and generator torques. Modelling also highlights the presence of circulating current components flowing between the turbines, which give rise to both transient and steady-state interactions. Finally, the impact of increasing the branch inductances is studied and shown to affect the response of the machines following changes of wind speed.",

keywords = "cluster based wind farms, wind energy, turbines",

author = "Elliott, {Douglas W.} and Jones, {Catherine E.} and Finney, {Stephen Jon}",

year = "2014",

month = nov,

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doi = "10.1049/etr.2014.0019",

language = "English",

journal = "Engineering and Technology Reference",

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publisher = "Institution of Engineering and Technology",

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T1 - Offshore wind farm cluster-based DC collection network

T2 - operation and design considerations

AU - Elliott, Douglas W.

AU - Jones, Catherine E.

AU - Finney, Stephen Jon

PY - 2014/11/5

Y1 - 2014/11/5

N2 - A direct current (DC) cluster-based wind farm collection network with permanent magnet generators and passive rectifiers is described and modelled. The ability of the generator speed to ‘slip’ from the cluster synchronous speed is discussed along with the relationship between the slip and generator stator inductances. An investigation of the harmonics present in the system highlights the presence of sixth harmonic torque and DC current components. Modelling of two and five turbine clusters indicates that the super position of the sixth harmonics produced by adjacent turbines, introduces a lower frequency harmonic components to both the DC current and generator torques. Modelling also highlights the presence of circulating current components flowing between the turbines, which give rise to both transient and steady-state interactions. Finally, the impact of increasing the branch inductances is studied and shown to affect the response of the machines following changes of wind speed.

AB - A direct current (DC) cluster-based wind farm collection network with permanent magnet generators and passive rectifiers is described and modelled. The ability of the generator speed to ‘slip’ from the cluster synchronous speed is discussed along with the relationship between the slip and generator stator inductances. An investigation of the harmonics present in the system highlights the presence of sixth harmonic torque and DC current components. Modelling of two and five turbine clusters indicates that the super position of the sixth harmonics produced by adjacent turbines, introduces a lower frequency harmonic components to both the DC current and generator torques. Modelling also highlights the presence of circulating current components flowing between the turbines, which give rise to both transient and steady-state interactions. Finally, the impact of increasing the branch inductances is studied and shown to affect the response of the machines following changes of wind speed.

KW - cluster based wind farms

KW - wind energy

KW - turbines

U2 - 10.1049/etr.2014.0019

DO - 10.1049/etr.2014.0019

M3 - Article

SN - 2056-4007

JO - Engineering and Technology Reference

JF - Engineering and Technology Reference

ER -

Offshore wind farm cluster-based DC collection network: operation and design considerations

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Keywords

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