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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
https://doi.org/10.5194/wes-2018-37
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research articles
23 May 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Wind Energy Science (WES).
Field-Test of Wind Turbine by Voltage Source Converter
Nicolás Espinoza and Ola Carlson Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, 412 96, Sweden
Abstract. One of the main challenge for the wind energy development is to make the wind turbines efficient in respect of costs while maintaining a safe and reliable operation. An important design criterion is the fulfilment of Grid Codes given by transmission system operators (TSO). The Grid Codes state how wind turbines/farms must behave when connected to the grid in normal and abnormal conditions. In this regard, it is well known that not all the technical requirements can be tested by using the actual impedance-based testing equipment. For this reason, a new type of testing equipment which comprises the use of fully-rated Voltage Source Converter (VSC) in back-to-back configuration is proposed. Thanks to the full controllability of the applied voltage in terms of magnitude, phase and frequency, the use of VSC-based testing equipment, provides more flexibility as compared with actual testing systems. In addition, the AC grid is decoupled from the tested object when performing the test; meaning that the strength of the grid is not a major limitation. Finally, test results of a 4 MW wind turbine and an 8 MW test equipment, located in Gothenburg, Sweden, are shown in order to validate the investigated grid code testing methodology.
Citation: Espinoza, N. and Carlson, O.: Field-Test of Wind Turbine by Voltage Source Converter, Wind Energ. Sci. Discuss., https://doi.org/10.5194/wes-2018-37, in review, 2018.
Nicolás Espinoza and Ola Carlson
Nicolás Espinoza and Ola Carlson
Nicolás Espinoza and Ola Carlson

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Short summary
An important design criterion for the electric drive system of a wind turbine is the fulfilment of Grid Codes given by transmission system operators. The Grid Codes state how wind turbines/farms must behave when connected to the grid in normal and abnormal conditions. A type of testing equipment which comprises the use of fully-rated Voltage Source Converter in back-to-back configuration for grid code testing is proposed. Test results of a 4 MW wind turbine and an 8 MW test equipment is shown.
An important design criterion for the electric drive system of a wind turbine is the fulfilment...
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