Capacitive high-voltage direct-current circuit breaker with current-limiting capability

Abstract

The application discloses a capacitor type high-voltage direct-current circuit breaker with current-limiting capability, which comprises a direct-current power supply, a main current passing branch, a current-limiting branch, a breaking branch, a bypass branch and an overhead line, the direct-current power supply is connected with the input end of the main current passing branch, and the output end of the main current passing branch is connected with the overhead line; the direct-current power supply is connected with the input end of the current-limiting branch through a first diode, the input end of the current-limiting branch is connected with the overhead line through a second diode, the output end of the current-limiting branch is connected with the input end of the breaking branch, the output end of the breaking branch is connected with the bypass branch, the output end of the breaking branch is further connected with the direct-current power supply through a third diode and an eleventh thyristor, and the output end of the breaking branch is connected with the overhead line through a fourth diode. When the line is normal, the current of the direct-current power supply flows into the overhead line through the main current passing branch; when a line fault occurs, the current-limiting branch converts the fault current into the current-limiting branch, and the breaking branch and the bypass branch release energy.

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