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access icon openaccess Characteristics of sub-synchronous interaction among D-PMSG-based wind turbines

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 24/08/2018, Accepted 19/09/2018, Published 23/10/2018

With the development of wind energy conversion system (WECS), sub-synchronous oscillations (SSO) phenomena have occurred in direct-drive permanent magnetic synchronous generators (D-PMSGs)-based wind farms. There are several studies on the analysis of the SSO worldwide. However few researchers are concern about the interaction among D-PMSGs. Considering the interaction among D-PMSGs, especially in the weak grid condition, some researches are conducted in this study. The model of D-PMSG is shown firstly. Then the simulations are carried out to research the characteristics of interaction among D-PMSGs. Control parameters of grid side converter and wind turbine (WT) operating conditions are taken into consideration. At last, a proper mitigation method is introduced. Meanwhile, the impact of interaction among WTs on the effect of mitigation method is studied. The simulation result shows that there are distinct interactions among D-PMSGs. The interactions among D-PMSGs need to be considered when coordinating the SSO mitigation control among D-PMSGs.

Inspec keywords: wind power plants; power generation control; wind turbines; permanent magnet generators; power grids; synchronous generators

Other keywords: distinct interactions; wind energy conversion system; simulation result; D-PMSG-based wind turbines; SSO mitigation control; sub-synchronous oscillations phenomena; wind farms; direct-drive permanent magnetic synchronous generators; weak grid condition; SSO worldwide; WECS; grid side converter; proper mitigation method; control parameters; sub-synchronous interaction

Subjects: Wind power plants; Synchronous machines; Control of electric power systems

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http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2018.8572
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