Power distribution protection system and method, power distribution equipment and power distribution system

Abstract

The invention discloses a power distribution protection system and method, power distribution equipment and a power distribution system. The power distribution protection system comprises a current transformer, a digital control terminal and a circuit breaker, wherein an input end of the circuit breaker is connected with a power distribution bus, an output end of the circuit breaker is connected with a power distribution circuit, the power distribution circuit side of the circuit breaker is further provided with the current transformer, the digital control terminal is connected with the circuit breaker and the current transformer, and the circuit breaker is provided with a disconnection operating component; the current transformer is used for collecting a current signal of the power distribution circuit and transmitting the current signal to the digital control terminal; the digital control terminal is used for generating a protection control signal according to the current signal collected by the current transformer and transmitting the protection control signal to the disconnection operating component of the circuit breaker; and the disconnection operating component is used for executing a closing operation or an opening operation according to the protection control signal so as to perform intelligent protection on the power distribution circuit. Therefore, double protectionis achieved for the power distribution system on the basis of preforming protection by using the physical performance of the circuit breaker.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of electrical equipment, and in particular to a power distribution protection system, method, power distribution equipment, and power distribution system. Background technique [0002] The low-voltage power distribution system is usually used to reduce the transmission voltage of the grid to the distribution voltage through the distribution transformer, and then supply the low-voltage power to the electrical equipment through the low-voltage power distribution equipment. [0003] There is a low-voltage circuit breaker at the power input end of the low-voltage power distribution system. The low-voltage circuit breaker is used to protect the power line and the motor. Equivalent to a combination of a fuse switch and an overheating relay. [0004] The above-mentioned circuit protection that utilizes the physical function of the low-voltage circuit breaker itself to perform serious over...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned circuit protection, which uses the physical functions of the low-voltage circuit breaker itself, is performed when the circuit is seriously overloaded, short-circuited, or under-voltage. When the low-voltage circuit breaker is faulty, the protection of the power distribution system cannot be realized.

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