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Journal of Applied Sciences
  Year: 2013 | Volume: 13 | Issue: 20 | Page No.: 4236-4240
DOI: 10.3923/jas.2013.4236.4240
Study on the Time Domain Identification Method for Low-order Modal Parameters of AACSR/EST Conductors using Improved RDT-ITD Method
Zhang Lichun and Liu Bin

Abstract:
Conductor low-order modal parameters are most important to study wind-induced vibration phenomenon for transmission lines. But there is still a lack for the effective test method to obtain these parameters. In this study, a improved RDT is obtained by proposing a new random sampling triggering condition, which is more advantaged for the limitations of the number of triggering points and the crossing threshold value than the traditional threshold level crossing triggering condition. Then, a time domain identification method for conductor low-order modal parameters is put forward by using the improved RDT-ITD method and introducing the digital filtering method and the averaging method, which is more effective to obtain these parameters under the condition of the natural excitation. Finally, two types of AACSR/EST conductors, AACSR/EST-500/230 and AACSR/EST-400/180, usually used in the large-crossing engineering are presented as examples to identify their low-order modal parameters to verify the feasibility of this method.
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How to cite this article:

Zhang Lichun and Liu Bin, 2013. Study on the Time Domain Identification Method for Low-order Modal Parameters of AACSR/EST Conductors using Improved RDT-ITD Method. Journal of Applied Sciences, 13: 4236-4240.

DOI: 10.3923/jas.2013.4236.4240

URL: https://scialert.net/abstract/?doi=jas.2013.4236.4240

 
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