All-weather automatic video monitoring system and method for opening and closing states of disconnecting switch

Abstract

The invention discloses an all-weather automatic video monitoring system and method for the opening and closing states of a disconnecting switch. The system is composed of a disconnecting switch marked with a positioning reflection point, a total station, a digital camera, a microcomputer, a central control system of a power supply station, a video monitoring system and a switch sequential controlsystem. The microcomputer consists of a camera control unit, an acquisition chip set, a parameter calibration chip set and an opening-closing state recognition chip set; the digital camera is connected to a microcomputer; and the total station is connected to the microcomputer. According to the all-weather automatic video monitoring system and method provided by the invention, non-contact measurement of the opening angle of the disconnecting switch as well as automatic determination of the switching state is realized; the method and the corresponding system are not limited by the meteorological conditions; and the all-weather monitoring as well as sending of standard opening and closing signal is realized. The universality is improved.

Description

technical field [0001] The invention relates to the field of intelligent control, in particular to an all-weather automatic video monitoring system and method for the opening and closing states of a disconnector. Background technique [0002] The isolating switch is the core equipment of the substation. Its function is to ensure the safety of high-voltage electrical appliances and devices during maintenance work, and to isolate the voltage. In the maintenance process of substation equipment, it is necessary to move the isolating switch to the designated position to realize the opening and closing of the circuit. Therefore, whether the isolating switch moves in place directly determines whether the line can operate normally. Considering that the voltage of the substation line can reach hundreds of kilovolts, and the maximum current can reach tens of kiloamperes, if the isolation switch does not move in place, it will cause great damage to the equipment, not only will lead to ...

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Problems solved by technology

This method has big problems in actual use: First, the mechanical device itself has various gaps and wear caused by processing, installation and long-term use, and the rotation angle of the motor and the movement angle of the disconnector cannot be completely synchronized, so There will be a situation where the motor rotates in place but the isolating switch does not move in place, and the judgment error rate is high; secondly, it needs to be confirmed twice by human eyes, which is poor in standardization and requires a lot of manpower and time. With the continuous progress of my country's power grid technology, the intelligent and automatic power grid control technology based on the idea of ​​"one-key sequential control" has entered the substantive implementation stage, and the way of judging by naked eyes is obviously unable to meet the above requirements

[0007] 2. According to the principle of camera measurement, before using the camera to measure the three-dimensional pose of the isolating switch, it is necessary to use complex calibration equipment and calibration methods to calibrate the imaging parameters of the camera. This link is time-consuming and laborious, and requires considerable technical ability and Experience is difficult for ordinary technicians to master;

[0008] 3. Substation measurement needs to be measured under all-weather conditions (day, night, rain, snow and fog), and the current camera measurement method is difficult to meet the above measurement requirements;

[0009] 4. The opening and closing signal of the isolating switch needs to be transmitted to the power grid dispatching control center, so the accuracy of the signal needs to be 100% accurate, and traditional video measurement cannot 100% ensure the accuracy of the signal

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