Network type protection method based on closed-loop mode operation of power network
A technology of power network and closed-loop mode, which is applied in the direction of emergency protection circuit devices, electrical components, information technology support systems, etc., can solve the problems of long processing time and slow response time, and achieve rapid fault location and isolation, and small line impact , easy-to-achieve effects
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Embodiment 1
[0082] Embodiment 1, when the communication is normal, a fault occurs between the circuit breaker of the terminal unit adjacent to the substation and the substation, that is, the fault point is point F1, and the protection action process is as follows:
[0083] A. After the outlet circuit breaker CB1 in the substation ES1 detects the fault current, it starts the quick-break protection function or the over-current protection function;
[0084] B. The intelligent controller in the terminal unit adjacent to the substation ES1 activates the quick-break protection function or the over-current protection function, and the circuit breaker S1 trips. Thereby isolating the point of failure.
Embodiment 2
[0085] Embodiment 2, when the communication is normal, a fault occurs between the circuit breakers of the terminal unit, namely figure 1 In the fault point F2, the protection action process is as follows:
[0086]A. The intelligent controller in the terminal unit located on one side of the fault point starts the quick-break protection function or the over-current protection function, and the circuit breaker S1 trips;
[0087] B. The intelligent controller in the terminal unit located on the other side of the fault point activates the quick-break protection function or the over-current protection function, and the circuit breaker S2 trips. Thereby isolating the point of failure.
Embodiment 3
[0088] Embodiment 3, when the communication is normal, a fault occurs between the circuit breakers of the terminal unit, namely figure 1 In the fault point F3, the protection action process is as follows:
[0089] A. The intelligent controller in the terminal unit located on one side of the fault point starts the quick-break protection function or the over-current protection function, and the circuit breaker S2 trips;
[0090] B. The intelligent controller in the terminal unit located on the other side of the fault point activates the quick-break protection function or the over-current protection function, and the circuit breaker S3 trips. Thereby isolating the point of failure.
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