Integrated mis-logical locking prevention system of digital substation

Abstract

The invention relates to an integrated mis-logical locking prevention system of a digital substation, which is characterized in that: the system comprises two stages of independent mis-logical locking prevention of a station monitor and control layer and mis-logical locking prevention of a bay layer, wherein the mis-logical locking prevention of the bay layer is established based on communicationbetween a bay layer and a process layer of a GOOSE mechanism; intelligent equipment of the bay layer acquires required state information participating in logic locking calculation by utilizing the GOOSE mechanism through a network of the process layer; and the system consists of an operator station of the station monitor and control layer, the intelligent equipment of the bay layer, and an intelligent interface of the process layer. The system makes up for the deficiency of the conventional anti-misoperation locking system, simplifies construction, improves reliability, and has clear hierarchies; and the GOOSE mechanism ensures quick and reliable information transmission.

Description

technical field [0001] The invention belongs to the technical field of electric power system automation, and in particular relates to an integrated anti-mistake logic locking system of a digital substation. Background technique [0002] How to prevent accidents (especially major accidents) caused by erroneous switching operations in the power system has always been a major problem in this industry. The microcomputer anti-misoperation locking system takes the heavy responsibility in the safe operation of the power system with its unique logical judgment ability. The existing microcomputer anti-misoperation locking system is a computer monitoring system based on the computer and its peripheral equipment and the intelligent expert system as the core to prevent human error. It consists of the following parts: microcomputer, analog operation and display Screens, on-site information collection and communication system devices, computer keys, electronic locking devices, intelligent...

AI Technical Summary

Problems solved by technology

For example: there is no signal connection (or incomplete connection) between the simulation graphics used in the existing microcomputer error prevention system and the actual device on site, and the correctness of the equipment status in the simulation graphics is directly related to the correctness of the simulation operation

If the equipment does not match the on-site equipment when the equipment is aligned, but the simulated operation can pass the detection of the five-defense expert system, a major error may occur

In addition, in the traditional microcomputer anti-misoperation locking system, it is required that after the operation content is sent to the computer key and operated, the operation process must be sent back to the anti-misoperation locking system manually (or through Bluetooth communication, etc.)

If no transmission is performed, the status of the equipment in the simulation graphics will not change, which will make the status of each equipment in the system inconsistent with the actual situation, leaving an unsafe factor for the next operation

[0003] With the continuous increase of the capacity of the substation, the continuous improvement of the voltage level, the improvement of the automation level of the substation, the increase of the number of unattended stations, and the daily operation and processing of the centralized control station or dispatching center are also increasing, and the amount of anti-mislocking information that needs to be involved increases. , the information verification between the conventional dedicated five-defense system and the integrated self-system is complicated, which increases the possibility of errors

Once the five-defense system crashes, it will seriously affect the safe and reliable operation of the power system

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