Abstract
In the article, the influencing factors of the high-voltage transmission line running were analyzed, the important meanings of the real-time online monitoring of the line contact point aging for guaranteeing the safe and stable running of the lines were pointed out, the theoretical reference and the project selection of the high-voltage transmission line temperature monitoring were discussed, and the structure composing, working principle and running mode of the project proposed by the author were mainly introduced. The system designed in the article could prejudge the faults of the contact points and implement the state overhaul.
Highlights
The common fault exists in above all methods, i.e. the manual work needs to be used in the spot, but the electric transmission lines are distributed in the very wide regions, so these methods are meaningless for the lines checking with large region
The first one is the remote viewing temperature coating method, i.e. several temperature coats with different colors are adsorbed on the line contact points in advance, and these temperature coats will melt under different temperatures, and the melting state of each coat can be observed by the telescope to judge the approximate temperature range of the contact point
Two methods all have their fixed deficiencies, i.e. they are largely influenced by the weather, and the measurement can not be implemented at any moment, and most lines are distributed in the wider regions, and the measurement will waste large numbers of manpower and materials
Summary
The first one is the remote viewing temperature coating method, i.e. several temperature coats with different colors are adsorbed on the line contact points in advance, and these temperature coats will melt under different temperatures, and the melting state of each coat can be observed by the telescope to judge the approximate temperature range of the contact point Another method is to utilize the remote infrared video camera which can only exactly observe the temperature only in the cloudy weather, not in the rain day, and the errors and the costs are large. The infrared mode is to utilize the infrared temperature sensor installed on the remote end to measure the temperature of the point, and this mode can not be jammed by the electromagnetic field, and it needs not the contact with the personnel. One point needs one sensor, and the costs of two methods are too high (Jia, 1998, P.61-66 & Zhang, 2004)
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