Minimization of Active Power and Torque Ripple for a Doubly Fed Induction Generator in Medium Voltage Wind Power Systems under Unbalanced Grid Conditions

Park, Yong-Gyun; Han, Daesu; Suh, Yongsug; Choi, Woo-Young

doi:10.6113/jpe.2013.13.6.1032

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…Here, the cable length of the faulty tooth should be increased to connect the contactor. Thus, it could affect the supply balance [13], [14]. However, the resistance of the contactor is very low to generate the unbalanced supply condition in the experiment.…”

Section: B Real-time Itf Generating Systemmentioning

confidence: 97%

Diagnosis technique for stator winding inter-turn fault in BLDC motor using detection coil

Lee

Kim

Hur

2015

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)

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Brushless direct-current (BLDC) motors are widely used in industrial applications. These motors should be considered for high stability and reliability under faults which can seriously threaten safe operation. Among these fault types, a stator winding inter-turn fault (ITF) is one of the most common faults that occur in BLDC motors. Moreover, the propagation of the fault could quickly lead to shutdown of the motor within a few seconds. In order to prevent the problem, we proposed a diagnosis technique of ITF using variations of back electromotive force generated in detection coils in BLDC motors. The technique can relatively achieve more rapid response and lower cost than previous detection techniques, because the proposed technique does not require spectral analysis and complicated computation. The detection technique is verified by simulation and experiment under dynamic fault. Index Terms--Brushless DC motor, fault detection, fault diagnosis, inter-turn fault

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Section: B Real-time Itf Generating Systemmentioning

confidence: 97%

Diagnosis technique for stator winding inter-turn fault in BLDC motor using detection coil

Lee

Kim

Hur

2015

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)

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“…Since the wind energy is not constant and the wind power is proportional to the cube of the wind speed, the output power of the wind farm is fluctuated due to the wind speed variation. This power fluctuation may lead to several problems for the power system operation such as power quality, system stability, system controls, especially if wind farm is connected to the weak grid or isolated island grids [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Power Smoothening Control of Wind Farms Based on Inertial Effect of Wind Turbine Systems

Nguyễn¹,

Lee²,

Kang³

2014

Journal of Electrical Engineering and Technology

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-This paper proposes a novel strategy for attenuating the output power fluctuation of the wind farm (WF) in a range of tens of seconds delivered to the grid, where the kinetic energy caused by the large inertia of the wind turbine systems is utilized. A control scheme of the two-level structure is applied to control the wind farm, which consists of a supervisory control of the wind farm and individual wind turbine controls. The supervisory control generates the output power reference of the wind farm, which is filtered out from the available power extracted from the wind by a low-pass filter (LPF). A lead-lag compensator is used for compensating for the phase delay of the output power reference compared with the available power. By this control strategy, when the reference power is lower than the maximum available power, some of individual wind turbines are operated in the storing mode of the kinetic energy by increasing the turbine speeds. Then, these individual wind turbines release the kinetic power by reducing the turbine speed, when the power command is higher than the available power. In addition, the pitch angle control systems of the wind turbines are also employed to limit the turbine speed not higher than the limitation value during the storing mode of kinetic energy. For coordinating the de-rated operation of the WT and the storing or releasing modes of the kinetic energy, the output power fluctuations are reduced by about 20%. The PSCAD/EMTDC simulations have been carried out for a 10-MW wind farm equipped with the permanent-magnet synchronous generator (PMSG) to verify the validity of the proposed method.

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Early Detection Technique for Stator Winding Inter-Turn Fault in BLDC Motor Using Input Impedance

Park

Jeong

Lee

et al. 2015

IEEE Trans. on Ind. Applicat.

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Minimization of Active Power and Torque Ripple for a Doubly Fed Induction Generator in Medium Voltage Wind Power Systems under Unbalanced Grid Conditions

Cited by 4 publications

References 21 publications

Diagnosis technique for stator winding inter-turn fault in BLDC motor using detection coil

Diagnosis technique for stator winding inter-turn fault in BLDC motor using detection coil

Power Smoothening Control of Wind Farms Based on Inertial Effect of Wind Turbine Systems

Early Detection Technique for Stator Winding Inter-Turn Fault in BLDC Motor Using Input Impedance

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