Land Cover and Topography Affect the Land Transformation Caused by Wind Facilities

doi:10.1201/b18529-16

Cited by 58 publications

(77 citation statements)

References 23 publications

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“…De acordo com Tchakoua et al (2014), os subsistemas do CMS podem ser classificados de acordo com o teste para coleta de dados (destrutivos ou não destrutivos). O teste destrutivo é uma forma de teste mecânico em que características específicas do material podem ser avaliadas quantitativamente.…”

Section: Classificação Dos Cmsunclassified

Sistemas De Monitoramento De Condição Em Usinas Eólicas

Barreto¹,

Medeiros²,

Santos³

et al. 2017

Blucher Design Proceedings

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Section: Classificação Dos Cmsunclassified

Sistemas De Monitoramento De Condição Em Usinas Eólicas

Barreto¹,

Medeiros²,

Santos³

et al. 2017

Blucher Design Proceedings

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“…Unlike conventional power plants, it is expensive to physically visit wind turbines for operation monitoring and maintenance, due to their location, tower height, and environmental conditions [1]. As a result, condition monitoring has represented a growing area and opportunity in the wind power industry.…”

Section: Wind Turbine Drive-train Operation Monitoringmentioning

confidence: 99%

Indicative Fault Diagnosis of Wind Turbine Generator Bearings Using Tower Sound and Vibration

2017

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Abstract:The idea of indicative fault diagnosis based on measuring the wind turbine tower sound and vibration is presented. It had been reported by a wind farm operator that a major fault on the generator bearing causes shock and noise to be heard from the bottom of the wind turbine tower. The work in this paper was conceived to test whether tower top faults could be identified by taking simple measurements at the tower base. Two accelerometers were attached inside the wind turbine tower, and vibration data was collected while the wind turbine was in operation. Tower vibration signals were analyzed using Empirical Mode Decomposition and the outcomes were correlated with the vibration signals acquired directly from the generator bearings. It is shown that the generator bearing fault signatures were present in the vibrations from the tower. The results suggest that useful condition monitoring of nacelle components can be done even when there is no condition monitoring system installed on the generator bearings, as is often the case for older wind turbines. In the second part of the paper, acoustic measurements from a healthy and a faulty wind turbine are shown. The preliminary analysis suggests that the generator bearing fault increases the overall sound pressure level at the bottom of the tower, and is not buried in the background noise.

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“…A second shorter backoff time, which does not depend on the hop count, is applied to delay the retransmission of the SpreadGrad message as: (2) where "MinDelay" is a constant which guarantees a minimum backoff time in the event of the "RDDelay" random value is zero. The BackOff_Retransmission is employed as a mechanism to increase the likelihood of all the neighbours receiving the packet.…”

Section: U N C O R R E C T E D P R O O F Pervasive and Mobile Computimentioning

confidence: 99%

“…Moreover, the wind turbine blades can rotate at varying velocities, producing unpredictable effects in the vibration characteristics of different parts of the wind turbines [1]. Reliable monitoring of these structures is a key step in identifying variations in their efficiency of operation, and in avoiding major failures which can result in mechanical or structural malfunctioning, breakage and significant financial loss [2,3]. The use of wireless sensors has been proposed as a solution to monitoring multiple components inside and outside these structures, principally targeting scenarios where wired instrumentation is impractical or difficult to install [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, sensors should be self-configuring and self-describing when connected, and be queryable in a human-readable manner, to facilitate their identification to the network and operators. (4) Maintenance inspection of wind turbines is expensive and such activities do not occur overly frequently [2]. Consequently, sensors must manage their energy source to remain operational for extended periods.…”

Section: Introductionmentioning

confidence: 99%

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