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Magnetic induction transferred DC circuit breaker

A technology of DC circuit breaker and circuit breaker, applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, etc., can solve the problems of increasing the manufacturing cost, difficulty and volume of charging unit, etc. , to reduce the control complexity and manufacturing cost, avoid reverse current, and improve the reliability of breaking

Active Publication Date: 2017-02-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure is simple and reliable, but the voltage of the pre-charged capacitor is equal to the system voltage after the disconnection is completed, and the charging unit for charging the capacitor must be able to withstand a higher system voltage, which increases the manufacturing cost, difficulty and volume of the charging unit, and becomes a limitation of the system. One of the reasons for the promotion of this type of hybrid circuit breaker

Method used

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  • Magnetic induction transferred DC circuit breaker
  • Magnetic induction transferred DC circuit breaker
  • Magnetic induction transferred DC circuit breaker

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Embodiment Construction

[0062] In a basic embodiment, the present disclosure discloses a magnetic induction transfer DC circuit breaker, the circuit breaker includes a main current circuit and a transfer current circuit;

[0063] The main current circuit is used to pass current under normal working conditions;

[0064] When a short-circuit fault occurs in the circuit system where the circuit breaker is located, the transfer current circuit is used to transfer the short-circuit fault current from the main current circuit.

[0065] Further, when the circuit system where the circuit breaker is located is in normal operation, current flows through the main current circuit, and at this time, no current flows through the transfer current circuit.

[0066] In one embodiment, the transfer current circuit in the above circuit breaker further implements the following form:

[0067] The transfer current circuit includes a circuit 1, a circuit 2, a circuit 3, a circuit 4, a circuit 5, and a circuit 6; The firs...

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Abstract

The invention relates to a magnetic induction transferred DC circuit breaker. The circuit breaker comprises a main current circuit and a transfer current circuit which are connected in parallel, wherein the main current circuit is used for a current in a normal working condition to pass through, and the transfer current circuit is used for transferring the current of a short-circuit fault to the main current circuit when the short-circuit fault occurs in a circuit system where the circuit breaker is located. The transfer current circuit adopts a bridge structure, a reverse current of a high-speed switch opening of the main current circuit can be avoided by controlling an action sequence of a conductive control in the transfer circuit, and the breaking capability is improved; and a mutual inductor is used for increasing a transfer speed of the short-circuit current, and bidirectional breaking of the current is achieved by a group of full-controlled power semiconductor devices.

Description

technical field [0001] The disclosure belongs to the field of medium and high voltage circuit breakers, and in particular relates to a magnetic induction transfer type DC circuit breaker. Background technique [0002] With the continuous improvement of power system capacity, DC power transmission and transformation equipment is booming, and at the same time, higher requirements are placed on system stability and safety. Among the various faults that may occur in the power system, short-circuit faults are the most harmful to the power grid and have a high probability of occurrence. When a short-circuit fault occurs in the power system, the rapidly rising short-circuit current will cause very serious consequences. [0003] A typical zero-current structure hybrid circuit breaker uses the reverse pulse current generated by the discharge of the pre-charged capacitor connected in series in the transfer current circuit to resist the current in the high-speed mechanical switch, the...

Claims

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Application Information

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IPC IPC(8): H02H3/087H02H9/02H02H9/04
CPCH02H3/087H02H9/02H02H9/045Y02E40/60
Inventor 荣命哲杨飞吴益飞吴翊张含天纽春萍胡杨
Owner XI AN JIAOTONG UNIV
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