Analysis of mechanical power fluctuations in asynchronous WECs

Feijóo, Andrés; Cidrás, J.

doi:10.1109/60.790871

Cited by 27 publications

(8 citation statements)

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“…Then, the machine can be modeled as an equivalent voltage source E behind an impedance r s + jx . The dynamic equations associated with E are then given by, [4], [10]…”

Section: System Modelmentioning

confidence: 99%

Steady State Analysis of Induction Generator Infinite Bus Systems

Kavasseri¹

2007

International Journal of Power and Energy Systems

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This paper conducts a fundamental analysis on the induction generator infinite bus system which is a useful representation for a wind energy converter interfaced to a utility through a transmission line. A third order model is used to represent the induction generator and the resultant nonlinear system equations are analysed to derive a condition that guarantees the existence of equilibrium points (or steady state solutions) to the dynamic system. This condition is used to derive three other auxiliary conditions which compute (i) the minimum value of capacitance, (ii) the maximum deliverable power and (iii) the maximum external reactance that can be connected to the machine. The conditions listed above are further studied numerically on three different sets of induction generator data. The impact of capacitive requirements on power factor and terminal voltage is examined. It is shown that terminal voltage regulation has a strong restrictive influence on the maximum transferable power. The analysis and studies presented could be a useful tool for preliminary planning studies involving wind energy converters.

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“…Then, the machine can be modeled as an equivalent voltage source E behind an impedance r s + jx . The dynamic equations associated with E are then given by, [4], [10]…”

Section: System Modelmentioning

confidence: 99%

Steady State Analysis of Induction Generator Infinite Bus Systems

Kavasseri¹

2007

International Journal of Power and Energy Systems

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“…The electrical power is calculated by Re (7) If the induction generator is assumed to be in the initial steady-state situation, an operating point defined by the values , , , , and , then the value of a small variation of , , taking (1) and (2) into account, can be calculated by integrating the following equation [7], [10]: (8) where Also, the following can be written for the electromechanical equations (3):…”

Section: Induction Wind Turbine Modelsmentioning

confidence: 99%

“…This model was already used in [10] for deriving a steady-state model for wind turbines with mechanical fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Synchronization of asynchronous wind turbines

Cidrás

Feijóo

Carrillo

2002

IEEE Trans. Power Syst.

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“…16 and Fig. 17 show the averaged spectrum of the generated power at DFIG substation [ 14,15,16]. Nevertheless, mean fluctuation is small compared to the nominal power of the farm due to partial cancellation of oscillation.…”

Section: B1 Experimental Datamentioning

confidence: 99%

Power Quality Analysis of Wind Turbines. Part II - Dynamic Analysis

Amada¹,

Bayod²,

Ortiz³

et al. 2003

REPQJ

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Abstract-This is the second part of a study on Power Quality (PQ) analysis of Wind Turbines (WT) installed in wind farms. A specifically designed measurement system has been installed in three wind farms with three different types of asynchronous generators of 600 kW and 700 kW classes.This part is focused on the analysis of transient events, connections and disconnections and power fluctuations. A new method to study power fluctuations based in joint timefrequency analysis is proposed.Transient events such as connection of capacitor banks are studied with the waveforms. The firing of thyristors during soft start is also studied through waveforms. The whole evolution during the connection of the generator is analyzed through the RMS value of each cycle of the grid because it is a longer transient. Power fluctuations are also studied through values of current and power each cycle or half-cycle.Index Terms-wind energy, switching events, timefrequency analysis.

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Analysis of mechanical power fluctuations in asynchronous WECs

Cited by 27 publications

References 1 publication

Steady State Analysis of Induction Generator Infinite Bus Systems

Steady State Analysis of Induction Generator Infinite Bus Systems

Synchronization of asynchronous wind turbines

Power Quality Analysis of Wind Turbines. Part II - Dynamic Analysis

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