What is the microcomputer five anti-locking device:
Microcomputer five-proof: that is, the microcomputer-type anti-electrical misoperation device is used for the high-voltage switchgear to prevent electrical misoperation. It is usually composed mainly of main components, analog screen, computer key, mechanical code lock and electric code lock.
The contents of the microcomputer five-proof device
1) Prevent mis-sorting and closing circuit breakers
2), to prevent the load and separation switch
3) Prevent the live connection (closed) grounding wire (grounding switch)
4), to prevent ground wire transmission
5), to prevent accidental charging interval
The composition of the microcomputer five defense system:
The microcomputer five anti-locking device is mainly composed of four parts: the operation ticket generation system, the simulation preview system, the maintenance system and the operation ticket training system.
1. Operation ticket generation system. The operation ticket generation system starts from the site demand, and checks the correctness of the operation of the equipment and the secondary equipment one by one by taking the work mode as the core, and then generates the operation ticket.
2. Simulation preview system. The simulation rehearsal system fundamentally changed the analog disk only for one-time device rehearsal, and the secondary device (protective platen) uses the artificial voicing rehearsal mode. It provides a secondary device graphical interface for simultaneous rehearsal operations on primary and secondary equipment.
3. Maintain the system. The maintenance system can implement the common statement of adding or modifying the operation ticket, the operation ticket task, the protection, the device status of the device simulation preview system, and the enlargement and restoration function of the screen.
4. Operation ticket training system. The ticket training system is designed with a unique ticket training function. The operator only needs to select an operation ticket generated by the memory, and then the ticket filling practice can be performed according to the operation prompt given by the operator.
Microcomputer five anti-locking device problems Some people in operation in recent years unmanned substation using integrated automation system, using electrical logic to solve the problem of electrical five anti-locking. This method has the following problems.
1. In order to collect the state quantity of electrical equipment, a large number of cables are used, and the investment is large, and even the cost of the five-link locking device itself is almost the same.
2. Poor reliability. Due to the use of a large number of mechanical auxiliary contacts, including the contacts of the intermediate relays, these auxiliary contacts may not be a big problem for a short period of time, the operation time is slightly longer, the disadvantages of unreliable contact, and the intermediate relays may be mis-switched for some reason, making the closure impossible. It may cause misjudgment, misoperation, DC grounding, etc.
3. A large number of five anti-closed contents cannot be electrically locked due to the inability to collect equipment status, such as a large number of temporary ground lines, net doors, bay doors and cabinet doors. Some projects use the addition of various microswitches to collect the state quantities of these devices. This is not advisable.
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