Microcomputer intelligent arc light protective system

Abstract

The invention discloses a microcomputer intelligent arc light protective system, and relates to the technical field of electrical equipment. The microcomputer intelligent arc light protective system comprises a main control unit, arc light units, electric current units, breakers and a power source. The power source supplies power to the main control unit, then working voltage is supplied to the arc light unit and a circuit unit by the main control unit, the main control unit is connected with the multiple arc light units, the multiple electric current units and the multiple breakers, and the arc light units, the electric current units and the breakers are arranged in different switch cabinets. The microcomputer intelligent arc light protective system can monitor the situations of arc light and electric currents in the switch cabinets in real time and continuously transmit data detected to the main control unit, and the main control unit forecasts and judges faults likely to happen according to previous data and sends a trip operation signal to the breakers, so that damage to equipment is avoided.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a switch cabinet monitoring system. Background technique [0002] The existing common / distribution medium-voltage switchgear is the power supply hub of the auxiliary equipment / power supply system of the whole plant. When an internal fault occurs, whether the fault can be quickly removed is very important for the safe operation of the whole plant / power distribution system. However, the medium-voltage busbars of the current medium-voltage switchgear are not equipped with any special protection, but are taken care of by the relevant backup protection of the incoming line switch, and the protection of the incoming line switch and the outgoing line switch needs to cooperate with each other, and generally The delay level difference of quick-break protection is at least 300ms, even 500ms, and the coordination of over-current protection is even worse as long as 1-2 seconds. ...

AI Technical Summary

Problems solved by technology

[0002] The existing common / distribution medium-voltage switchgear is the power supply hub of the auxiliary equipment / power supply system of the whole plant. When an internal fault occurs, whether the fault can be quickly removed is very important for the safe operation of the whole plant / power distribution system. However, the medium-voltage busbars of the current medium-voltage switchgear are not equipped with any special protection, but are taken care of by the relevant backup protection of the incoming line switch, and the protection of the incoming line switch and the outgoing line switch needs to cooperate with each other, and generally The delay level difference of quick-break protection is at least 300ms, even 500ms, and the coordination of over-current protection is even worse as long as 1-2 seconds. In other words, there is still no protection for the existing factory-used medium-voltage bus to remove the fault at the first time. In view of the important position of the medium-voltage bus, we are extremely unwilling to see any delayed removal of faults. Due to the various faults in the switch cabinet, the arc and high temperature generated by the breaking current, the gas in the cabinet will expand rapidly, and it can reach the peak in a very short time, seriously endangering the safety of people and equipment.

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