A Vision-Based Technique for Ice-coating Shape Measurement of Transmission Lines Conductor
Icing of overhead transmission lines can affect the safe operation of the power distribution and transmission grid due to the additional weight load of the accumulated ice-coating on transmission lines conductors.Monitoring and predicting of icing enable its removal at an early stage will have significant implication for the power system.Since the ice-coating thickness is the main characteristics of the icing status,the calculation of the ice-coating thickness has much to do with the ice-coating shape on the conductors.But the ice accretion on conductors is related to wind speed,wind direction,environmental temperature and humidity,precipitation rate,liquid water content,droplet size,conductor twisting,and so on,which lead to the various irregular ice-coating shapes on the conductors.The ice-coating shape of transmission lines conductor is also an important shape characteristics whose analysis is useful to promote the ice-coating thickness and ice-coating weight calculation as well as the ice-melting time estimation.There are various countermeasures ranging from mechanical methods to electrical methods,all of these methods are implemented by installing necessary sensors.In this paper,we present a measurement system that is based on two digital cameras and on an offline processing algorithm.Two cameras separately acquire an image sequence of the iced conductor from the top view and the front view;then,an image processing algorithm extracts the conductor contour and measures both the diameters on the same point of the iced conductor images captured from the two cameras.An irregular-shaped model of the ice-coating is developed and employed to describe the cross-section ice-coating shape accumulated on the conductor;finally,a mathematical model of the ice-coating weight in per unit length is built to test the proposed algorithm with a manual method based on direct weighing method.Analogous field test and lab tests have been carried out with the proposed system in a artificial icing laboratory using two digital cameras with good withstand low temperature capability.
Transmission lines conductor ice-coating shape ice-coating weight vision-based
HUANG Xinbo ZHANG Ye
College of Electronics and Information,Xian Polytechnic University,Xian Xian,China
国际会议
重庆
英文
1-5
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）