Loss of Synchronism of Wind Turbine Converters during Low Voltage Grid Faults

Ömer Göksu; Poul Ejnar Sørensen; Florin Iov; Claus Leth Bak; Philip Carne Kjær

Loss of Synchronism of Wind Turbine Converters during Low Voltage Grid Faults

Ömer Göksu, Poul Ejnar Sørensen, Florin Iov, Claus Leth Bak, Philip Carne Kjær

Department of Wind Energy

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

In the recent grid codes, wind power plants are
required to stay connected and inject reactive and active
currents during grid short-circuit faults, even when the grid
voltage drops down to zero. However, the physical fact, Loss
of Synchronism (LOS) of wind turbines during these very low
voltage faults has been underestimated in the grid codes; and
the LOS has recently been explored only in few studies. In this
paper the LOS phenomenon is studied, especially focusing on
the case of a string of wind turbines, rather than an
aggregated one. It is shown that the LOS affects the wind
power plant as whole. Additionally, existing methods to solve
the LOS problem are briefly reviewed, and a closed loop
frequency based solution is implemented within PowerFactory
simulations of a detailed generic wind power plant model.

Original language	English
Title of host publication	Proceedings of the 13th Wind Integration Workshop
Number of pages	6
Publication date	2014
Publication status	Published - 2014
Event	13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Plants - Berlin, Germany Duration: 11 Nov 2014 → 13 Nov 2014

Conference

Conference	13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Plants
Country	Germany
City	Berlin
Period	11/11/2014 → 13/11/2014

Keywords

Short-circuit faults
Converters
Current control
Power system stability
Wind Power Generation
Phase locked loops
IEC standards

Cite this

@inproceedings{8dc5c40b8ff94b15b032fc5b4617109e,

title = "Loss of Synchronism of Wind Turbine Converters during Low Voltage Grid Faults",

abstract = "In the recent grid codes, wind power plants arerequired to stay connected and inject reactive and activecurrents during grid short-circuit faults, even when the gridvoltage drops down to zero. However, the physical fact, Lossof Synchronism (LOS) of wind turbines during these very lowvoltage faults has been underestimated in the grid codes; andthe LOS has recently been explored only in few studies. In thispaper the LOS phenomenon is studied, especially focusing onthe case of a string of wind turbines, rather than anaggregated one. It is shown that the LOS affects the windpower plant as whole. Additionally, existing methods to solvethe LOS problem are briefly reviewed, and a closed loopfrequency based solution is implemented within PowerFactorysimulations of a detailed generic wind power plant model. ",

keywords = "Short-circuit faults, Converters, Current control, Power system stability, Wind Power Generation, Phase locked loops, IEC standards ",

author = "{\"O}mer G{\"o}ksu and S{\o}rensen, {Poul Ejnar} and Florin Iov and Bak, {Claus Leth} and Kj{\ae}r, {Philip Carne}",

year = "2014",

language = "English",

booktitle = "Proceedings of the 13th Wind Integration Workshop",

note = "13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Plants ; Conference date: 11-11-2014 Through 13-11-2014",

}

Göksu, Ö, Sørensen, PE, Iov, F, Bak, CL & Kjær, PC 2014, Loss of Synchronism of Wind Turbine Converters during Low Voltage Grid Faults. in Proceedings of the 13th Wind Integration Workshop. 13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Plants, Berlin, Germany, 11/11/2014.

TY - GEN

T1 - Loss of Synchronism of Wind Turbine Converters during Low Voltage Grid Faults

AU - Göksu, Ömer

AU - Sørensen, Poul Ejnar

AU - Iov, Florin

AU - Bak, Claus Leth

AU - Kjær, Philip Carne

PY - 2014

Y1 - 2014

N2 - In the recent grid codes, wind power plants arerequired to stay connected and inject reactive and activecurrents during grid short-circuit faults, even when the gridvoltage drops down to zero. However, the physical fact, Lossof Synchronism (LOS) of wind turbines during these very lowvoltage faults has been underestimated in the grid codes; andthe LOS has recently been explored only in few studies. In thispaper the LOS phenomenon is studied, especially focusing onthe case of a string of wind turbines, rather than anaggregated one. It is shown that the LOS affects the windpower plant as whole. Additionally, existing methods to solvethe LOS problem are briefly reviewed, and a closed loopfrequency based solution is implemented within PowerFactorysimulations of a detailed generic wind power plant model.

AB - In the recent grid codes, wind power plants arerequired to stay connected and inject reactive and activecurrents during grid short-circuit faults, even when the gridvoltage drops down to zero. However, the physical fact, Lossof Synchronism (LOS) of wind turbines during these very lowvoltage faults has been underestimated in the grid codes; andthe LOS has recently been explored only in few studies. In thispaper the LOS phenomenon is studied, especially focusing onthe case of a string of wind turbines, rather than anaggregated one. It is shown that the LOS affects the windpower plant as whole. Additionally, existing methods to solvethe LOS problem are briefly reviewed, and a closed loopfrequency based solution is implemented within PowerFactorysimulations of a detailed generic wind power plant model.

KW - Short-circuit faults

KW - Converters

KW - Current control

KW - Power system stability

KW - Wind Power Generation

KW - Phase locked loops

KW - IEC standards

M3 - Article in proceedings

BT - Proceedings of the 13th Wind Integration Workshop

T2 - 13th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Plants

Y2 - 11 November 2014 through 13 November 2014

ER -