Modelling and transient stability of large wind farms

Akhmatov, Vladislav; Knudsen, Hans; Nielsen, Arne Hejde; Pedersen, Jørgen Kaas; Poulsen, Niels Kjølstad

doi:10.1016/s0142-0615(02)00017-0

Cited by 144 publications

(84 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 6 shows the voltage dips simulated at the Points of Common Coupling (PCC) for each wind farm in case of a three phase fault in a transmission line close to the wind farms. The method of power reduction at the instant of a fault at the grid was implemented for the ASIG wind turbine, [16]. An auxiliary control system substitutes the normal power controller of the wind turbine, which ramps down the mechanical power of the rotor.…”

Section: Fault Ride Through Capabilitymentioning

confidence: 99%

Dynamic security issues in autonomous power systems with increasing wind power penetration

Margaris

Hansen

Sørensen

et al. 2011

Electric Power Systems Research

View full text Add to dashboard Cite

Abstract-Dynamic security of autonomous power systems has become a challenge due to increasing levels of wind penetration during the last years. The special features of non-interconnected power systems make security issues rather critical and operation of wind farms as conventional power plants is becoming a necessity as wind turbines replace conventional units in the production side. This paper describes the study case of Rhodes island, in Greece, where rapidly increasing wind penetration has started to impose serious security issues for the immediate future.

show abstract

Section: Fault Ride Through Capabilitymentioning

confidence: 99%

Dynamic security issues in autonomous power systems with increasing wind power penetration

Margaris

Hansen

Sørensen

et al. 2011

Electric Power Systems Research

View full text Add to dashboard Cite

show abstract

“…The pitch servo is modeled with a first order system (4)-(7) (10) (11) (13) with a time constant, T d . As recently the servomotor can operate very fast, servo system delay is chosen 0.25 sec and 0.2 sec respectively in (10) (11) . But probably there might be some other delays, i.e.…”

Section: Controller Designmentioning

confidence: 99%

Transient Stability Enhancement of Wind Generator by a New Logical Pitch Controller

et al. 2006

View full text Add to dashboard Cite

In this paper, a new logical pitch controller equipped with fuzzy logic controller (FLC) has been proposed which can enhance the transient performance of wind turbine generator system (WTGS) when severe network disturbances occur in power system. Moreover, it can maintain the output power at rated level when wind speed is over the rated speed. Before transient stability analysis, it is necessary to determine initial values of WTGS connecting with the external network. In this paper, the initial value calculation method of WTGS is discussed also at different windy conditions. Finally, in order to evaluate the effectiveness of the proposed controller for transient stability, simulations have been carried out for severe network disturbances and windy conditions. From the simulation results it is seen that the proposed controller can enhance the transient stability of wind generator at any network, fault or windy condition as well as maintain output power of wind generator at rated level when wind speed is over the rated speed.The model system used for simulation of transient stability is shown in Fig. 1. The main purpose of using the pitch controller with wind turbine is to maintain a constant output power at the terminal of the induction generator (IG) when wind speed is over the rated speed. The proposed controller as shown in Fig. 2 can serve this purpose well. Moreover, it can also enhance the transient stability of induction generator. For the robustness of the pitch controller it is necessary to sense the terminal voltage of IG as the controller input. If the IG rotor speed increases to threshold value, i.e. 3% increase from its rated speed, the controller works in speed control mode, where W THR IG is the threshold value. Pitch controller operating status will be determined by a status gain whose input will be the output of logical comparator. The performance of the proposed pitch controller equipped with FLC is compared to that of equipped with PI controller. The power and speed response of IG after a 3LG fault in power system are shown in Fig. 3 and Fig. 4 respectively. It is clear Mohd. Hasan Ali * MemberRion Takahashi * MemberToshiaki Murata * MemberJunji Tamura * MemberIn order to investigate the impacts of the integration of wind farms into utilities networks, transient stability should be analyzed before connecting wind turbine generator system (WTGS) to the power system. In this paper, a new logical pitch controller equipped with fuzzy logic controller (FLC) has been proposed, which can enhance the transient performance of WTGS during severe network disturbances. Moreover, it can maintain the output power at rated level when wind speed is over the rated speed. Before transient stability analysis, it is necessary to determine initial values of WTGS connected to the external network. In this paper, the initial value calculation method of WTGS is discussed at different wind conditions. Finally, in order to evaluate the effectiveness of the proposed controller in improving the transient stability, simul...

show abstract

“…Depending on the severity of the fault, the impact on the stability of the wind farm will vary. However, if reactive power compensation and blade-angle control is used, voltage stability and fault ride-through capability may improve [6], [7]. In addition, the Danish grid code [3] specifies the allowed levels of temporary overvoltage acceptable when wind farms are isolated from the grid.…”

Section: Introductionmentioning

confidence: 99%

Transient Model Validation of Fixed-Speed Induction Generator Using Wind Farm Measurements

Rogdakis

García-Valle

Arana

2012

IEEE Trans. Power Syst.

View full text Add to dashboard Cite

Modelling and transient stability of large wind farms

Cited by 144 publications

References 4 publications

Dynamic security issues in autonomous power systems with increasing wind power penetration

Dynamic security issues in autonomous power systems with increasing wind power penetration

Transient Stability Enhancement of Wind Generator by a New Logical Pitch Controller

Transient Model Validation of Fixed-Speed Induction Generator Using Wind Farm Measurements

Contact Info

Product

Resources

About