Parallel microcomputer electrical anti-mislocking device

Abstract

The invention discloses a parallel microcomputer electrical anti-mislocking device, including a touch screen display, an indicator light, a power supply board, a CPU board, a main DSP board, a spare DSP board, an input board, and an output board. According to the parallel microcomputer electrical anti-mislocking device, logic of a locking loop is clear and explicit through anew locking method, locking logic can be checked at any time, and a specific fault point can be pointed out quickly which is prone for modification, repair and maintenance. At the same time, reliability under various faultconditions is realized by two kinds of locking modes which are simultaneous changing locking and different positionssumming locking. The parallel microcomputer electrical anti-mislocking device of theinvention ensures same reliability as an electrical locking mode plus a logic locking modeand at the same time has advantages of convenience in quick defect removal, easy in management, and simplicity in wiring.

Description

technical field [0001] The invention relates to a locking device, in particular to a parallel microcomputer electric anti-misoperation locking device. Background technique [0002] In order to ensure the safety of personnel during operation, high-voltage electrical equipment such as substations and power plants should be equipped with perfect anti-misoperation locking devices to realize the "five preventions" function. At present, most of the locking methods are mechanical locking + electrical locking. Among them, the electrical locking method realizes the locking function through the series connection of auxiliary nodes of circuit breakers, isolating switches, grounding switches, electromagnetic locks and other devices (some locking conditions need to be connected in series with the logic locking conditions of the microcomputer measurement and control device), and the locking circuit is complicated. It brings great difficulties to daily management, defect elimination and m...

AI Technical Summary

Problems solved by technology

[0004] (1) The failure of any auxiliary contact of any switch, knife switch, or ground knife on the series circuit will affect the operation, and it is necessary to check item by item along the logical conditions, which is difficult and time-consuming to maintain

[0005] (2) The on-site drawings are missing or the personnel who eliminate the defects come from other work sites without carrying the drawings, which makes it more difficult to deal with the fault, and the difficulty of handling increases

[0006] (3) After the circuit is formed, the equipment runs once, and the blocking conditions cannot be visually checked

For some substations (especially old substations), whether the blocking conditions in the operation regulations are consistent with the actual wiring on site needs to be verified, which makes troubleshooting more difficult.

[0007] (4) Once the circuit is formed, if it needs to be changed, the workload is relatively large and the work is complicated, which cannot well meet the daily work and use of the substation

[0008] (5) When there is an abnormality in the logic blocking element in the measurement and control device, with the technical level of the current secondary personnel, most of them cannot call and check the abnormal point in the logic blocking condition, and can only rely on the manufacturer to solve it

[0010] (7) The special responsibility for the error prevention of the equipment operation and maintenance management unit and the external unit responsible for the error prevention repair do not have the ability to troubleshoot faults. The task of eliminating defects also needs to rely on the secondary protection personnel with a withered team, resulting in management confusion and secondary personnel tasks. heavy

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