System and method for monitoring working states of isolation switches

Abstract

The invention discloses a system and a method for monitoring working states of isolation switches. The system comprises a controller and state monitoring equipment; the state monitoring equipment comprises image acquisition equipment, an electric holder and an electric zoom lens; the image acquisition equipment is arranged on the electric holder; the electric holder rotates under the control of the controller; the image acquisition equipment on the electric holder acquires images of the isolation switches with mark points along with the rotation of the electric holder; the electric zoom lens is mounted on the image acquisition equipment and is used for adjusting a shooting focal length of the image acquisition equipment; and the controller controls the electric holder to work, the electriczoom lens to perform zooming and the image acquisition equipment to perform acquisition work, and judges the opening and closing states of the isolation switches according to the positions of the mark points in the current acquired images of the isolation switches. The isolation switches in a large range can be monitored; and the system has the advantages of being low in cost, convenient to mount, simple in image acquisition equipment control, and high in accuracy and automation level of monitoring the working states of the isolation switches.

Description

technical field [0001] The invention belongs to the technical field of electric power detection, and in particular relates to a system and method for monitoring the working state of an isolating switch. 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 great econ...

AI Technical Summary

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

However, in the process of judging the state of the isolating switch using video camera measurement, there are still the following problems: video camera measurement uses a digital camera as an image acquisition device, and there is a natural contradiction between its observation range and measurement resolution, that is, the larger the observation range, the lower the measurement accuracy

A substation has dozens or hundreds of isolating switches, and the field of view of a single camera cannot cover all the isolating switches

A separate image acquisition device must be configured for each isolation switch, which has disadvantages such as high cost, complicated installation, and difficult camera control

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