Journal ArticleDOI
Inertia Provision and Estimation of PLL-Based DFIG Wind Turbines
Wei He,Xiaoming Yuan,Jiabing Hu +2 more
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TLDR
In this paper, an alternative inertial control method for doubly fed induction generator (DFIG)-based wind turbines by directly adjusting the phase locked loop (PLL) response is presented.Abstract:
This paper presents an alternative inertial control method for doubly fed induction generator (DFIG)-based wind turbines by directly adjusting the phase locked loop (PLL) response. The synthetic internal voltage vector of the wind turbine-driven DFIG is defined in the electromechanical timescale to present the dynamic properties. The phase angle motion equation is further deduced to depict the relationship between the contributed inertial response and the defined internal voltage. Based on the developed motion equation, the equivalent inertia is estimated and quantified, and further found to be significantly determined by the PLL parameters. Moreover, the effect of both PLL and active power control on the defined internal voltage dynamics is also described during the inertial response. Simulated results on a modified 3-machine, 9-node test system were conducted to validate the feasibility of the proposed inertial control method and the correctness of the developed inertial characteristics.read more
Citations
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Journal ArticleDOI
Modeling of Grid-Connected VSCs for Power System Small-Signal Stability Analysis in DC-Link Voltage Control Timescale
TL;DR: In this article, a small-signal model is proposed to understand VSC external characteristics based on motion equation concept also featured in synchronous generator (SG), which can hold the main behaviors of concern.
Journal ArticleDOI
Advanced Control Strategies of PMSG-Based Wind Turbines for System Inertia Support
Yujun Li,Zhao Xu,Kit Po Wong +2 more
TL;DR: In this paper, two novel control strategies that enable system inertia supports by permanent magnet synchronous generator (PMSG) wind turbines during transient events are investigated, which can effectively provide system inertia support by fully utilizing WT's own potentials, while minimizing its impacts on wind energy harvesting.
Journal ArticleDOI
State-of-the-art review on frequency response of wind power plants in power systems
TL;DR: In this article, a comprehensive survey on frequency regulation methods for variable speed wind turbines is presented, including the concepts, principles and control strategies of prevailing frequency controls of VSWTs, including future development trends.
Journal ArticleDOI
A Virtual Synchronous Control for Voltage-Source Converters Utilizing Dynamics of DC-Link Capacitor to Realize Self-Synchronization
TL;DR: In this paper, a virtual synchronous control (ViSynC) is proposed for VSCs, which utilizes the dynamics of the dc-link capacitor to realize self-synchronization.
Journal ArticleDOI
Wind in Weak Grids: Low-Frequency Oscillations, Subsynchronous Oscillations, and Torsional Interactions
Yin Li,Lingling Fan,Zhixin Miao +2 more
TL;DR: In this article, an analytical model of type-4 wind in weak grids that can demonstrate both low-frequency and sub-synchronous frequency oscillations was presented, and the analysis results were validated using a testbed built in MATLAB/SimPowerSystems.
References
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Book
Power System Stability and Control
TL;DR: In this article, the authors present a model for the power system stability problem in modern power systems based on Synchronous Machine Theory and Modelling, and a model representation of the synchronous machine representation in stability studies.
Journal ArticleDOI
Wind turbines emulating inertia and supporting primary frequency control
TL;DR: In this article, a method is proposed to let variable-speed wind turbines emulate inertia and support primary frequency control, where the required power is obtained from the kinetic energy stored in the rotating mass of the turbine blades.
Proceedings ArticleDOI
Virtual synchronous machine
H.-P. Beck,R. Hesse +1 more
TL;DR: In this paper, a new power electronics based approach is described which allows a grid compatible integration of predominantly renewable electricity generators even in weak grids making them appear to be electromechanical synchronous machines.
Journal ArticleDOI
Comparison of the response of doubly fed and fixed-speed induction generator wind turbines to changes in network frequency
Janaka Ekanayake,Nick Jenkins +1 more
TL;DR: In this paper, a doubly fed induction generator (DFIG)-based wind turbine is used to control a restraining torque on the rotor according to a predetermined curve with respect to the rotor speed.
Proceedings ArticleDOI
Virtual synchronous generators
Johan Driesen,K. Visscher +1 more
TL;DR: In this paper, the authors proposed to add virtual rotational inertia to the distributed generators to stabilize the grid frequency by adding a short-term energy storage to the generator, combined with a suitable control mechanism for its power electronics converter.