Stand alone induction generators

Levy, D.

doi:10.1016/s0378-7796(96)01183-2

Cited by 24 publications

(10 citation statements)

References 3 publications

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“…The power coefficient can be described as the portion of mechanical power extracted from the total power available from the wind, and it is unique for each turbine. This power coefficient is generally defined as a function of the tip-speed-ratio which, in turn, is given by (2) where represents the rotational speed of the wind turbine. Fig.…”

Section: Wind Turbine Modelmentioning

confidence: 99%

Modeling and control of a wind turbine driven doubly fed induction generator

Tapia

Ostolaza

et al. 2003

IEEE Trans. On Energy Conversion

684

300

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This paper presents the simulation results of a grid-connected wind driven doubly fed induction machine (DFIM) together with some real machine performance results. The modeling of the machine considers operating conditions below and above synchronous speed, which are actually achieved by means of a double-sided PWM converter joining the machine rotor to the grid. In order to decouple the active and reactive powers generated by the machine, stator-flux-oriented vector control is applied. The wind generator mathematical model developed in this paper is used to show how such a control strategy offers the possibility of controlling the power factor of the energy to be generated. Index Terms-Doubly fed induction machine, power converter, power factor, vector control, wind power generation. I. NOMENCLATURE Stator side power factor. Wind turbine net power factor. Grid frequency. Stator magnetising current space phasor modulus. , Direct-and quadrature-axis stator magnetising current components respectively, expressed in the stationary reference frame. Rotor current space phasor modulus. , Direct-and quadrature-axis rotor current components respectively, expressed in the stationary reference frame. , Direct-and quadrature-axis rotor current components respectively, expressed in the stator-flux-oriented reference frame. , Reference values of the rotor current and components, respectively. , Direct-and quadrature-axis rotor current components respectively, expressed in the rotor natural reference frame. , Direct-and quadrature-axis stator current components respectively, expressed in the stationary reference frame.

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Section: Wind Turbine Modelmentioning

confidence: 99%

Modeling and control of a wind turbine driven doubly fed induction generator

Tapia

Ostolaza

et al. 2003

IEEE Trans. On Energy Conversion

684

300

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“…Starting operation of squirrel cage induction machine in generator mode is quite different than it is met in case of motor mode operation [1, 5,7]. Induction motor starts from steady state with speed equal to zero so the inverter (MSC) supplies stator windings with active and reactive current components starting with its initial frequency equal to zero.…”

Section: Starting Generator Operationmentioning

confidence: 99%

Application of induction squirrel cage machine as a generator in ship electric network

Kozak

Zawirski

2010

Proceedings of 14th International Power Electronics and Motion Control Conference EPE-PEMC 2010

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In the paper a concept of generator for ship electric network based on squirrel cage machine driven by propeller shaft is proposed. Electric energy generated by a squirrel cage machine is double converted because of variable shaft speed. Problems of sensorless control of generator as well as specific starting and initial excitation procedure were analyzed. Presented results of simulation investigations were validated by laboratory experiment.

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“…Similarly, the use of capacitors to start single phase induction motors is well documented [3], [4] but, the purpose of capacitors in single phase motors is to provide a spatial variation to a single phase supply and not current limiting or reactive power compensation. The approach of application of capacitors in motor starting stems from the use of capacitors in standalone induction generator systems [5], [6].However, the capacitors are connected only during the starting in the former case and are constantly connected in the circuit in the later case.…”

Section: Introductionmentioning

confidence: 99%

Application of Capacitor for Starting a Large 3 Phase Induction Motor in a Stand Alone Grid

Mayadeo¹,

Desale²,

Satam³

et al. 2018

EasyChair Preprints

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Abstract-A standalone grid poses some quintessential and precarious problems of its own. One problem is the starting of large motors. While designing a standalone grid, a motor starting study is essential. This study is done to make sure the generator is capable of providing the starting reactive power required by the largest motor under the worst case. In one project, the generator in a standalone grid was incapable of delivering the required reactive power without increasing the generator rating. In that case, a variable frequency drive (VFD) starter was proposed to start the largest motor. This study investigates an alternative cost saving option for the same problem. The approach is to use capacitance during the motor starting. This compensates the starting reactive power requirements. This approach can be easily extended to micro grids, other standalone grids or captive generation. The study is performed using ETAP.

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Stand alone induction generators

Cited by 24 publications

References 3 publications

Modeling and control of a wind turbine driven doubly fed induction generator

Modeling and control of a wind turbine driven doubly fed induction generator

Application of induction squirrel cage machine as a generator in ship electric network

Application of Capacitor for Starting a Large 3 Phase Induction Motor in a Stand Alone Grid

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