SSR Analysis of DFIG-Based Wind Farm With VSM Control Strategy

The wind turbine is usually integrated into the power grid via back to back converter, and the inertia is decreased. Virtual synchronous machine (VSM) control was proposed to improve inertia of the wind farm. While for the doubly-fed induction generator (DFIG)-based wind farm with traditional contro...

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Bibliographic Details
Published in:IEEE access 2019, Vol.7, p.118702-118711
Main Authors: Gu, Kanghui, Wu, Feng, Zhang, Xiao-Ping, Ju, Ping, Zhou, Haiqiang, Luo, Jiajie, Li, Jianing
Format: Article
Language:English
Subjects:
Compensation
Control stability
Converters
Doubly fed induction generators
eigenvalue analysis
Eigenvalues
Electric power grids
Induction generators
Inertia
Phase locked loops
Rotors
SSR
Stability analysis
Stators
Strategy
Synchronous machines
Transient analysis
Transmission lines
Voltage control
VSM
Wind farms
Wind power
Wind power generation
wind power plant
Wind turbines
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Summary:The wind turbine is usually integrated into the power grid via back to back converter, and the inertia is decreased. Virtual synchronous machine (VSM) control was proposed to improve inertia of the wind farm. While for the doubly-fed induction generator (DFIG)-based wind farm with traditional control strategy, sub-synchronous resonance (SSR) has become a significant problem when it is connected to series compensation transmission lines. Therefore, the impacts of VSM control strategy for DFIG on SSR need to be investigated. In this paper, a detailed small-signal stability analysis model of the VSM control strategy is first established and eigenvalue analysis is then carried out. SSR in the wind farm with the VSM control under different series compensation levels, controller parameters and wind speeds is analyzed, and it is also compared to that in the wind farm with the conventional vector control strategy (VC). Simulations are performed in PSCAD/EMTDC to verify the result of SSR analysis.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2936872