Power transmission line sag measurement method based on infrared camera image processing

Abstract

The invention relates to a power transmission line sag measurement method based on infrared camera image processing. The method comprises the following steps of calibrating a measurement site and an infrared camera; through the infrared camera, acquiring image information near a sag observation point, processing an image and extracting a pixel coordinate of the observation point; acquiring processed image data and calculating so as to obtain a sag of a power transmission line; determining whether the sag of the power transmission line is in a safe range, if the sag of the power transmission line is not in the safe range, sending information to a monitoring terminal, receiving the information and then outputting alarm information by the monitoring terminal; and if the sag of the power transmission line is in the safe range, returning to the step that the infrared camera acquires the image information near the sag observation point. By using the method of the invention, a calculating model is concise and all-weather real-time on-line monitoring can be performed on the power transmission line sag. During establishing a system, less equipment is required, performance is reliable, the structure is simple and cost is low.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of electric power systems, and in particular relates to a transmission line sag measurement method based on infrared camera image processing. Background technique [0002] With the development of my country's economy, the demand for electric energy in industrial production and residents' daily life continues to grow, which puts forward higher requirements for the transmission capacity of my country's power grid. Raising the operating upper limit of the transmission network is a more economical and feasible solution to reduce the operating cost of the power grid and alleviate the transmission pressure. According to statistics, the operating upper limit of the existing transmission network has the potential to increase by 5% to 20%. [0003] Sag is the main restrictive factor for the upper limit of the transmission network operation. Line operating load, conductor temperature, stress, ice...

AI Technical Summary

Problems solved by technology

If the sag is too small, the conductor stress will be too large, which will affect the mechanical safety of the conductor; if the sag is too large, the distance between the line and the ground and nearby obstacles will be too close, which will cause safety hazards to people and animals under the transmission line, and line galloping will easily occur Interphase short circuit

At present, the methods for on-line monitoring of transmission line sag mainly include temperature stress method and inclination angle method. These methods require many assumptions as the premise of the model, and the measurement results are either too conservative or very different from the actual situation, and have not reached the accuracy of sag measurement. actual purpose

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