Protective pressure plate state monitoring method and protective pressure plate state monitoring system based on Hall sensor effect

Abstract

The invention provides a protective pressure plate state monitoring method and a protective pressure plate state monitoring system based on a Hall sensor effect. The method comprises the following steps: setting a magnet on a connecting piece of a protective pressure plate, and setting Hall elements on a cabinet body near the protective pressure plate, wherein the protective pressure plate is arranged on a power cabinet in a substation and connected with the cabinet body, and the Hall elements are unipolar Hall switches; adjusting the position of each Hall element according to the trigger distance and release distance of each Hall element; connecting the Hall elements to a Hall switch integrated circuit, and setting the output of the Hall switch integrated circuit to be sent to a principal computer; and monitoring the state of the protective pressure plate in real time according to the Hall switch integrated circuit. The system comprises a magnet, Hall elements, and a principal computer. Misoperation causing a protection function is avoided effectively. The method is of low power consumption and high accuracy. The state of a pressure state can be monitored without interfering with a pressure plate control circuit. The system has high sensitivity and strong anti-jamming capability, and has high practical operability and a broad application prospect.

Description

technical field [0001] The invention relates to the technical field of substations, in particular to a method and system for monitoring the state of a protective pressure plate based on the Hall sensor effect. Background technique [0002] With the rapid development and wide application of computer, network communication and database technologies, the automation level of substations has been booming and reaching new peaks, which has greatly improved the efficiency and safety of power grid operation. Relay protection is an important part of the substation automation system, and its device itself has a very high level of automation. However, in view of the extreme importance of visible breakpoints to the safe operation and maintenance of the relay protection system, the relay protection function still generally adopts the manual operation of the protection pressure plate to switch on and off, which limits the relay protection and measurement and control unit and remote control...

AI Technical Summary

Problems solved by technology

However, in view of the extreme importance of visible breakpoints to the safe operation and maintenance of the relay protection system, the relay protection function still generally adopts the manual operation of the protection pressure plate to switch on and off, which limits the relay protection and measurement and control unit and remote control to a certain extent. Communication interaction and automation process of mobile terminals

[0003] The relay protection outlet protection pressure plate acts on the tripping of the circuit breaker and the start of other protection functions. It is the functional boundary point between the protection device and the primary equipment control circuit and the blind spot of state monitoring. Its switching state detection is still at the level of manual on-site verification.

However, the pressure plates of the protective screen cabinet have the characteristics of large number, dense arrangement, and low layout, which greatly restricts the accuracy and reliability of manual verification of the state of the pressure plates.

Inaccurate pressure plate status detection, on the one hand, will lead to frequent errors in the pressure plate state calibration, and the data show that there are too many accidents caused by the wrong switching of the pressure plate; efficiency

[0004] At present, scholars have carried out related research on this problem, but they cannot avoid the misoperation of protection functions, increase the difficulty of image acquisition, high power consumption or defects in accuracy; therefore, in practical engineering applications, there is an urgent need for a A pressure plate state detection technology that conforms to the current pressure plate design specifications, has a low degree of renovation of the screen cabinet, and is economical and effective, and realizes the state monitoring of the pressure plate on the basis of not interfering with the control circuit of the primary equipment

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