Numerical Model Validation and Sensitivity Study of a Transmission-Line Insulator Failure Using Full-Scale Test Data

Tucker, Kyle B.; Haldar, Asim

doi:10.1109/tpwrd.2007.899781

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…As shown in Table 2, the SAA based result is slightly inclusive of both MC and IA results. Since the aim of uncertainty based analysis is finding the worst-case results, as opposed to the punctual method in (6)(7)(8)(9)(10)(11)(12), the slight inclusiveness can be considered as one of the benefits of SAA. Table 3-5 shows the OTL tension, sag and cable length respectively.…”

Section: Resultsmentioning

confidence: 99%

“…According to [6], the insulator length has less effect on the tower cross arm than the combined wind pressure, ice loading and the initial tension. The cross arms of the towers are initially designed to withstand both the wind pressure and ice loading, however with global weather changes the same area may face different loading than what has been predicted during the design stage.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Overhead Transmission Line Parameters with Uncertainty

Abebea¹,

Rao²,

Naik³

2017

IJEM

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Overhead Transmissions Lines (OTL) are outdoor systems, which can easily be affected by weather fluctuation. In the worst-case scenario, temperature variation, horizontal wind and vertical ice-loading make the value of sag, tension and conductor (cable) length to vary between low to high extremes. The temperature and cable length variations have an effect on the resistance of the OTL. This variation leads to a variable voltage drop, which is mostly considered with load variation. In order to calculate resultant loading, sag, tension, cable length and resistances of an OTL, an uncertainty model based on Standard Affine Arithmetic (SAA) is proposed and the result is compared with the probabilistic Monte Carlo (MC) and Interval Arithmetic (IA) approaches. Based on the test results, the SAA based algorithm gives slightly conservative bound than the IA and MC approaches.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Overhead Transmission Line Parameters with Uncertainty

Abebea¹,

Rao²,

Naik³

2017

IJEM

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show abstract

“…Evidently, even the linear dynamic theory cannot accurately describe the forms of motion of cables. It is irrefutable that the wind-induced vibration response of longspan, lightweight, and small-damping transmission lines has inherently nonlinear characteristics [15][16][17][18][19][20][21][22][23][24]. However, the current design specification still requires the use of the linear static theory of suspended cables to design transmission lines, which clearly cannot meet the engineering demand.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamic Analysis of High‐Voltage Overhead Transmission Lines

Zhang

Zhao

2018

Shock and Vibration

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According to a generalized Hamilton’s principle, three-dimensional (3D) nonlinear vibration equations for overhead transmission lines that consider geometric nonlinearity are established. Based on the characteristics of an actual transmission line, the 3D equations are simplified to two-dimensional equations, and the nonlinear vibration behavior of transmission lines is investigated by combining theoretical analysis with numerical simulation. The results show that transmission lines have inherently nonlinear vibration characteristics. When in free vibration, a transmission line can undergo nonlinear internal resonance, even when its initial out-of-plane energy is relatively low; as its initial out-of-plane energy increases, the coupling of in-plane and out-of-plane vibration becomes stronger. When forced to vibrate by an external excitation, due to the combined action of internal and primary resonance, the vibration energy of a transmission line transfers from the out-of-plane direction to the in-plane direction that is not directly under the excitation, resulting in an increase in the dynamic tension and the displacement amplitude of the transmission line. Increasing damping can consume the vibration energy of a transmission line but cannot prevent the occurrence of internal resonance.

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Analysis on the dynamic responses of a prototype line from iced broken conductors

Yang

Zhang

et al. 2014

Engineering Failure Analysis

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Numerical Model Validation and Sensitivity Study of a Transmission-Line Insulator Failure Using Full-Scale Test Data

Cited by 9 publications

References 3 publications

Analysis of Overhead Transmission Line Parameters with Uncertainty

Analysis of Overhead Transmission Line Parameters with Uncertainty

Nonlinear Dynamic Analysis of High‐Voltage Overhead Transmission Lines

Analysis on the dynamic responses of a prototype line from iced broken conductors

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