Research on Sag Online Monitoring System for Power Transmission Wire Based on Tilt Measurement

Author(s): Xia Xiao*, Yan Xu, Jianghua Zhang, Ken Xu
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
International Journal of Smart Grid and Clean Energy, vol. 2, no. 1, January 2013: pp. 6–11
ISSN: 2315-4462
Digital Object Identifier: 10.12720/sgce.2.1.6-11  

Abstract: Sag online monitoring system for power transmission wire based on tilt angle measurement was proposed, the mathematical model of catenary for power wire was established. Sag calculation models of power wire in the situation without swinging and swinging were derived. By measuring the power wire axial angle and swing angle with dual-axis tilt sensor, the sag could be accurately calculated with the wire swinging. By testing the sag detection system, the result showed that the sag detection system could meet the engineering requirements of sag measurement.

Keywords: Tilt, sag, catenary model, online monitoring

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