Knife switch state closing reliability judging method based on distance between knife switch arm feature points

Abstract

The invention discloses a knife switch state closing reliability judging method based on the distance between knife switch arm feature points, which achieves accurate positioning of a contact area of a knife switch in an image in a feature point matching mode, achieves recognition positioning of circle feature areas respectively located on two knife switch arms in an image circle detection mode, calculating the diameter of a circle on any side and the distance of two circle area centers to calculate the proportionate relationship between the diameter and the distance so as to achieve knife switch state closing reliability judging. The knife switch state closing reliability judging method based on the distance between knife switch arm feature points has the advantages of achieving knife switch closing reliability judging based on the image pattern recognition technology, replacing operators to achieve knife switch closing in place reliability judging, greatly reducing labor intensity of the operators, shortening operation time, eliminating influence of subjective factors of onsite staff, and being small in working load and system cost and high in practicality.

Description

technical field [0001] The invention belongs to the field of automatic control of substations, and in particular relates to a method for judging the closing reliability of a knife switch state based on the distance between characteristic points of knife switch arms. Background technique [0002] In the substation operation, the knife switch is an important equipment for changing the operation mode. During the switching operation of the substation, due to the abnormality of the limit switch of the secondary circuit of the knife switch or the loosening or jamming of the primary mechanical components of the knife switch, the knife switch will cause the knife switch. The unreliable failure of the gate opening and closing will directly affect the safety and reliability of the power supply of the system, and may cause the occurrence of vicious accidents, which will inevitably affect the production of industry and agriculture and the normal life of people, and bring losses to the na...

AI Technical Summary

Problems solved by technology

[0008] 1. "A device for detecting the opening and closing of the knife switch" realizes the judgment of the opening and closing of the knife switch by changing the physical structure of the knife switch. In the process, it is necessary to cut off the power of the line, which brings inconvenience to production and life

[0009] 2. The "Pattern Recognition Method for Switches in Substations Based on Infrared Detection" uses the analysis of infrared images to achieve the automatic identification of the opening and closing status of the switches, but it cannot realize the automatic identification of the reliability of the opening and closing of the switches.

[0010] 3. "A method for identifying the reliability of opening and closing of the knife switch based on image pattern recognition" uses image pattern recognition technology to achieve automatic identification of the reliability of the opening and closing of the knife switch, but this method is only applicable to the horizontal rotation described in the patent type knife switch, not suitable for the type of knife switch described in this article

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