Rapid protection system of electric power substation
A technology for protection systems and substations, applied in emergency protection circuit devices, electrical components, etc., to solve problems such as damage and long-term existence of short-circuit faults in feeder cabinets
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[0069] Embodiment two:
[0070] image 3 Shown here is another schematic diagram of the structure of the main control unit provided in an embodiment of the application.
[0071] Such as image 3 As shown, the main control unit may further include: a second trip circuit 14, wherein: the second trip circuit 14 is connected to the current comparator 11 and the first trip circuit 13 respectively.
[0072] The second trip circuit is used to turn off the corresponding switch according to the comparison result of the current comparator 11 and the trip signal output by the first trip circuit 13.
[0073] Specifically:
[0074] 4. If the current is abnormal and the first trip signal is detected, a fourth trip signal is generated and sent to the low-voltage side switch and the bus tie switch;
[0075] 5. If the current is abnormal and the second trip signal is detected, the fifth trip signal is generated and sent to the high-voltage side switch;
[0076] 6. If the current is abnormal and the third ...
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