A sensitivity based approach to assess the impacts of integration of variable speed wind farms on the transient stability of power systems

The participation of wind power in the energy mix of current power systems is progressively increasing, with variable-speed wind turbines being the leading technology in recent years. In this line, dynamic models of wind turbines able to emulate their response against grid disturbances, such as voltage dips, are required. To address this issue, the International Electronic Commission (IEC) 61400-27-1, published in 2015, defined four generic models of wind turbines for transient stability analysis. To achieve a widespread use of these generic wind turbine models, validations with field data are required. This paper performs the validation of three generic IEC 61400-27-1 variable-speed wind turbine model topologies (type 3A, type 3B and type 4A). The validation is implemented by comparing simulation results with voltage dip measurements performed on six different commercial wind turbines based on field campaigns conducted by three wind turbine manufacturers. Both IEC validation approaches, the play-back and the full system simulation, were implemented. The results show that the generic full-scale converter topology is accurately adjusted to the different real wind turbines and, hence, manufacturers are encouraged to the develop generic IEC models.

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Transient stability risk assessment of power systems incorporating wind farms

Journal of Modern Power Systems and Clean Energy ◽

10.1007/s40565-013-0022-2 ◽

2013 ◽

Vol 1 (2) ◽

pp. 134-141 ◽

Cited By ~ 10

Author(s):

Lu Miao ◽

Jiakun Fang ◽

Jinyu Wen ◽

Weihua Luo

Keyword(s):

Risk Assessment ◽

Power Systems ◽

Transient Stability ◽

Wind Farms

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Enhancing the Transient State Performance of Permanent Magnet Synchronous Generator Based Variable Speed Wind Turbines Using Power Converters Excitation Parameters

Frontiers in Energy Research ◽

10.3389/fenrg.2021.655051 ◽

2021 ◽

Vol 9 ◽

Author(s):

Kenneth E. Okedu ◽

Hind Barghash

Keyword(s):

Wind Turbine ◽

Permanent Magnet ◽

Transient Stability ◽

Power Converters ◽

Wind Farms ◽

Transient State ◽

Synchronous Generator ◽

Variable Speed ◽

Permanent Magnet Synchronous Generator ◽

Excitation Parameters

One of the ways of generating electrical power from wind energy is by employing the promising technology of the permanent magnet synchronous generator (PMSG) variable speed wind turbine (VSWT). With the daily increase and integration of wind farms into traditional power grids, it is imperative to carry out transient stability studies of wind generators in wind farms, in order to fulfill the operational grid codes. To solve the transient stability intricacies posed by the stochastic nature of wind energy during transient states or grid faults, this paper presents the enhancement of PMSG wind turbine considering the excitation parameters of the insulated gate bipolar transistors (IGBTs) of the wind generator. The investigation was carried out using the turn on and turn off resistances of the IGBTs of the power converters of the PMSG wind turbine, considering different scenarios, with and without over voltage protection scheme. A severe three-line-to-ground fault was used to test the robustness and rigidity of the controllers of the wind generator during transient state. Furthermore, the results obtained using the PMSG wind turbine were compared to those using the doubly fed induction generator (DFIG) wind turbine. The evaluation of the system performance was done using the power system computer “aided” design and electromagnetic transient including DC (PSCAD/EMTDC) platform. The same conditions of operation were used in investigating the various scenarios considered in this study.

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Enhancement of Power System Transient Stability by the Coordinated Control between an Adjustable Speed Pumping Generator and Battery

Applied Sciences ◽

10.3390/app10249034 ◽

2020 ◽

Vol 10 (24) ◽

pp. 9034

Author(s):

Junji Tamura ◽

Atsushi Umemura ◽

Rion Takahashi ◽

Atsushi Sakahara ◽

Fumihito Tosaka ◽

...

Keyword(s):

Power Systems ◽

Power System ◽

Wind Farm ◽

Transient Stability ◽

Wind Farms ◽

System Stability ◽

Synchronous Generators ◽

Adjustable Speed ◽

The Stability ◽

Network Fault

The penetration level of large-scale wind farms into power systems has been increasing significantly, and the frequency stability and transient stability of the power systems during and after a network fault can be negatively affected. This paper proposes a new control method to improve the stability of power systems that are composed of large wind farms, as well as usual synchronous generators. The new method is a coordinated controlling method between an adjustable-speed pumping generator (ASG) and a battery. The coordinated system is designed to improve power system stability during a disconnection in a fixed-rotor-speed wind turbine with a squirrel cage-type induction generator (FSWT-SCIG)-based wind farm due to a network fault, in which a battery first responds quickly to the system frequency deviation due to a grid fault and improves the frequency nadir, and then the ASG starts to supply compensatory power to recover the grid frequency to the rated frequency. The performance of the proposed system was confirmed through simulation studies on a power system model consisting of usual synchronous generators (SGs), an ASG, a battery, and an SCIG-based wind farm. Simulation results demonstrated that the proposed control system can enhance the stability of the power system effectively.

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