Overview of torque control of a doubly fed induction generator

Rongve, K.S.; Naess, B.I.; Undeland, Tore; Gjengedal, T.

doi:10.1109/ptc.2003.1304406

Cited by 3 publications

(2 citation statements)

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“…During a fault, the voltage drop will lead to shaft and gearbox mechanical stresses and overcurrent surges. Speed control is necessary in order to limit the mechanical stresses and power surge for these high-power systems [95][96][97]. To protect the converter and to assist the wind turbine to support the grid, various control strategies have been considered and reported in [90][91][92][93][94].…”

Section: Recent Workmentioning

confidence: 99%

Generators

2007

Distributed Generation

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Section: Recent Workmentioning

confidence: 99%

Generators

2007

Distributed Generation

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“…For stability purposes the induction generator model may be based on standard equations describing the voltages, currents, fluxes and reactances in the stator and rotor in a d,q-axis reference system [9,10]. Equations (1)-(4) describe the voltages in the stator and rotor in such a reference system, where v ds , v qs , v dr and v qr are the voltages in the d-and q-axis for the stator(s) and rotor(s), the currents-have a corresponding notation, the fluxes are based on the reactances y, w b is the nominal frequency, w is the stator flux frequency and w r is the rotor frequency.…”

Section: Traditional and Doubly Fed Induction Generatormentioning

confidence: 99%

Large‐scale wind power farms as power plants

Gjengedal

2005

Wind Energy

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The integration of large-scale wind power into weak power systems raises several issues that must be clarified.Typically these include the practical connection to the network, integration with the network system, system stability, system operation, necessary installations and extensions of the network, etc. At the same time, careful attention must be paid to the functional requirements such wind farms should meet in order to enhance system responses. Different wind power technologies have different characteristics and control possibilities. In this article, three technologies have been studied with respect to their dynamic performance, and a transient stability study has been performed in order to illustrate the differences in the three technologies. The results clearly show that there are differences in behaviour and in control possibilities. Hence there are also differences in how well they can meet functional requirements.When discussing to what degree strict requirements should be imposed on wind power, it should be kept in mind that some requirements can be met with small or moderate costs, while others may be expensive or difficult to meet. Some requirements may also mean a reduction in generation and hence in revenues. Rather than imposing strict requirements on wind turbines as such, ancillary services should be met in the most suitable way. It is not obvious that the same requirements should apply to wind power in hydro power-dominated systems compared with, for instance, systems with a large share of nuclear or thermal power. It may well be cheaper to incorporate primary power control and system-stabilizing equipment in other power plants or grid points than in many small wind turbine generators. General conclusions cannot be made on this, but the issue should be the focal point of system operators everywhere. Copyright

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