A smooth switching strategy for steady-state operation control and fault transient control of doubly fed induction generator

As the proportion of wind power generation systems in power systems continues to rise, their dynamic response during system malfunctions has gained significant importance. As the grid short-circuit ratio continues to decrease, traditional fault ride-through algorithms for wind power generators may n...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2024-09, Vol.2855 (1), p.12004
Main Authors: Zhuang, Shenglun, Kong, Xiangmei, Qu, Huixing, Sun, Sujuan
Format: Article
Language:English
Subjects:
Algorithms
Asymmetry
Control systems
Dynamic response
Electric power systems
Induction generators
Phase locked loops
Reactive power
Service restoration
Short circuits
Steady state
Synchronism
Wind power
Wind power generation
Windpowered generators
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:As the proportion of wind power generation systems in power systems continues to rise, their dynamic response during system malfunctions has gained significant importance. As the grid short-circuit ratio continues to decrease, traditional fault ride-through algorithms for wind power generators may no longer be applicable. This is evidenced by voltage oscillations under significant disturbances and overvoltage issues during low-voltage ride-through, which are further aggravated during asymmetric fault conditions. Therefore, this paper focuses on the low-voltage ride-through issues of doubly fed induction wind power generators in weak power grids. It investigates the steady-state operation and transient control schemes and proposes a smooth transition strategy for steady-state and fault transient operations of doubly fed wind power generators. This approach guarantees the synchronization of active and reactive power, mitigates steady-state reactive power imbalance, and prevents voltage fluctuations triggered by recurring low-voltage ride-through occurrences. Furthermore, during fault recovery, a ramped active power restoration approach is employed to mitigate the coupling of active and reactive power introduced by the phase-locked loop, enabling rapid and stable restoration of active and reactive power outputs. As a result, superior dynamic performance is achieved during both symmetric and asymmetric fault processes. Finally, the superiority of the proposed smooth transition strategy under different fault scenarios is validated through simulations with the RTLAB platform.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2855/1/012004