NDLI: Assessment of subsynchronous oscillations in AC grid-connected VSC systems with type-4 wind turbines

Content Provider	IET Digital Library
Author	Sainz, Luis Monjo, Lluis Mane, Marc Cheah Liang, Jun
Abstract	Converters are the key for increasing the development of renewable energy generation but their dynamic interaction with the grid has an important impact on stability. Oscillatory instabilities in different grid-connected converter systems at several frequency ranges are reported. In particular, sub and supersynchronous oscillatory instabilities in AC power systems with type-3 and type-4 wind turbine generators (WTGs) were recently registered at several wind farm areas. A number of works based on eigenvalue analysis and frequency domain approaches are carried out to analyse this new stability issue and more research is going on to analyse in detail the electric and control parameters that may affect this phenomenon. This study contributes analysing in detail the influence of system parameters on the subsynchronous oscillations (SSOs) in AC power systems with type-4 WTGs. This study is based on a new approach for subsynchronous stability assessment which could also be used for analysing other types of SSOs (e.g. subsynchronous control interactions between doubly-fed induction generators and series-compensated networks) as well as supersynchronous oscillations. A representative example of weak AC grids with type-4 WTGs is used to illustrate the contributions of the study. Results are validated with PSCAD/EMTDC time-domain simulations.
Starting Page	3088
Ending Page	3096
Page Count	9
ISSN	17521416
Volume Number	13
e-ISSN	17521424
Issue Number	Issue 16, Dec (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/13/16
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0291
Journal	IET Renewable Power Generation
Publisher Date	2019-10-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Grid-connected VSC System AC Power System Asynchronous Generator Asynchronous Machine Control of Electric Power System Doubly Fed Induction Generator Dynamic Interaction Eigen Values And Eigen Function Eigenvalue Analysis Electric Control Parameter Frequency Domain Approach Grid-connected Converter System Mathematical Analysis Oscillation Oscillatory Instabilities Power Converter Power Generation Control Power Grid Power Supplies to Apparatus Power System Control Power System Dynamic Stability Renewable Energy Generation Stability Issue Suboscillatory Instabilities Subsynchronous Control Interactions Subsynchronous Oscillations Subsynchronous Stability Assessment Supersynchronous Oscillations Supersynchronous Oscillatory Instabilities System Parameter Time Domain Analysis TurboGenerator Type-4 Wind Turbine Generator Type-4 Wind Turbines Type-4 WTGs Weak AC Grid Wind Farm Areas Wind Power Plant Wind Turbine
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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