Efficiency calculation of wind turbine generation system with doubly-fed induction generator

Takahashi, Rion; Ichita, Hajime; Tamura, Junji; Kimura, Mamoru; Ichinose, Masaya; Futami, Motoo; Ide, Kazumasa

doi:10.1109/icelmach.2010.5608319

Cited by 23 publications

(22 citation statements)

References 4 publications

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“…The gross value, Gross CF, does not include the wake losses, the electric losses up to the point where the electricity fed into the grid is measured, and the production losses due to the mechanical availability of the WTG. The net value, Net CF, includes the effect of all the aforementioned losses expressed as a percentage) corresponding with long-term wind conditions [3,4] and the rated power of the WF [5][6][7]. These estimated electric losses at rated power are used in the design of the WF for setting technical requirements and to determine the foreseen net generation.…”

Section: Introductionmentioning

confidence: 99%

Simplified Analysis of the Electric Power Losses for On-Shore Wind Farms Considering Weibull Distribution Parameters

Colmenar‐Santos¹,

Campíez-Romero²,

Enríquez-García

et al. 2014

Energies

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Electric power losses are constantly present during the service life of wind farms and must be considered in the calculation of the income arising from selling the produced electricity. It is typical to estimate the electrical losses in the design stage as those occurring when the wind farm operates at rated power, nevertheless, it is necessary to determine a method for checking if the actual losses meet the design requirements during the operation period. In this paper, we prove that the electric losses at rated power should not be considered as a reference level and a simple methodology will be developed to analyse and foresee the actual losses in a set period as a function of the wind resource in such period, defined according to the Weibull distribution, and the characteristics of the wind farm electrical infrastructure. This methodology facilitates a simple way, to determine in the design phase and to check during operation, the actual electricity losses.

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Section: Introductionmentioning

confidence: 99%

Simplified Analysis of the Electric Power Losses for On-Shore Wind Farms Considering Weibull Distribution Parameters

Colmenar‐Santos¹,

Campíez-Romero²,

Enríquez-García

et al. 2014

Energies

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“…All these subsystems are controlled to realize the procedure of converting mechanical energy into electricity. The auxiliary systems in a WT include the cooling, lubrication and protection systems [11]. (1) Aerodynamic principle According to Betz theory, the power P extracted from the wind can be expressed by Equations (1)- (3) shown below:…”

Section: Methodsmentioning

confidence: 99%

An Electro-Thermal Analysis of a Variable-Speed Doubly-Fed Induction Generator in a Wind Turbine

et al. 2015

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This paper focuses on the electro-thermal analysis of a doubly-fed induction generator (DFIG) in a wind turbine (WT) with gear transmission configuration. The study of the thermal mechanism plays an important role in the development of cost-effective fault diagnostic techniques, design for reliability and premature failure prevention. Starting from an analysis of the DFIG system control and its power losses mechanism, a model that synthesizes the thermal mechanism of the DFIG and a WT system principle is developed to study the thermodynamics of generator stator winding. The transient-state and steady-state temperature characteristics of stator winding under constant and step-cycle patterns of wind speed are studied to show an intrinsic thermal process within a variable-speed WT generator. Thermal behaviors of two failure modes, i.e., generator ventilation system failure and generator stator winding under electric voltage unbalance, are examined in details and validated by both simulation and data analysis. The effective approach presented in this paper for generator fault diagnosis using the acquired SCADA data shows the importance of simulation models in providing guidance for post-data analysis and interpretation. WT generator winding lifetime is finally estimated based on a thermal ageing model to investigate the impacts of wind speed and failure mode. OPEN ACCESSEnergies 2015, 8 3387

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“…There are several manufacturers who provide large capacity DFIG. Generally, the overnight [40,41]. The discount rate is also assumed as 9%.…”

Section: In the Hyess-pmsgmentioning

confidence: 99%

Analysis of Various Energy Storage Systems for Variable Speed Wind Turbines

Kim¹,

Harrington²

2018

Advancements in Energy Storage Technologies

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During the high penetration of wind power, wind turbines can affect power quality directly due to an unstable and intermittency source. Voltage fluctuations, harmonics, and voltage drops might be factors in this environment. Energy storage systems (ESSs) with variable speed wind turbines (VSWTs) as a permanent magnetic synchronous generator (PMSG) and a doubly fed induction generator (DFIG) could be a solution to improve the power quality from the "variability" of wind power. This chapter investigates the proposed system, which comprises a hybrid ESS for the VSWT. It analyzes the ability of various ESSs (B, SC, and EDLC) based on VSWTs with various ESSs for power quality in terms of average THD (%) specified in reference to IEEE std-519-1992 and IEC 61400-21-Ed.2.0. In addition, this chapter investigates the DFIG with hybrid energy storage systems (Li ion battery and super capacitor ESS) for the economic evaluation in terms of payback time. The simulation results have been verified by a power system computer-aided design/electromagnetic transients direct current (PSCAD/EMTDC) to demonstrate the system performance under different scenarios.

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Efficiency calculation of wind turbine generation system with doubly-fed induction generator

Cited by 23 publications

References 4 publications

Simplified Analysis of the Electric Power Losses for On-Shore Wind Farms Considering Weibull Distribution Parameters

Simplified Analysis of the Electric Power Losses for On-Shore Wind Farms Considering Weibull Distribution Parameters

An Electro-Thermal Analysis of a Variable-Speed Doubly-Fed Induction Generator in a Wind Turbine

Analysis of Various Energy Storage Systems for Variable Speed Wind Turbines

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