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A Paradigm Change in Wind Power Station Control through Emulation of Conventional Power Plant Behaviour
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| Author(s) |
Florian FEIN, Markus SCHMIDT, Holger GROKE, Bernd ORLIK |
| Abstract |
With a new control concept presented in this paper, wind power stations with inverter-coupledsynchronous generators (SG-WPS) behave to a great extent like the turbine-generator sets ofconventional thermal power plants including the ability of the release of active- and reactive reservepower. This allows every single SG-WPS to improve its contribution to power grid stability. The newcontrol concept consists of three main subsystems: The control of the grid-side inverter, the control ofthe generator-side inverter and the control of the rotor speed with the pitch angle. This paper points toall named subsystems, but the main focus is on the control of the dc-link voltage of the frequencyinverter. In contrast to conventional control concepts of SG-WPS, where the dc-link voltage isregulated with the grid-side inverter, here it is controlled with the generator-side inverter. This is aparadigm change in wind power station control. Without the task of dc-link voltage control, the grid-sideinverter of the SG-WPS is operated with droop based virtual synchronous machine emulation. Itallows the SG-WPS to immediately react to grid disturbances by the release of active- and reactivereserve power. This is an important step in the conversion of a WPS from a “negative consumer” to avoltage source. Simulation results show the dynamic behaviour of the SG-WPS with the new controlconcept as a whole. A test bench and experimental results for the dc-link voltage control with thegenerator-side inverter will be presented. |
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| Filename: | 0316-epe2013-full-20251340.pdf |
| Filesize: | 1.19 MB |
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| Type |
Members Only |
| Date |
Last modified 2014-02-09 by System |
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