Self-oscillation type direct current breaker and control method thereof

A DC circuit breaker, self-excited oscillation technology, applied in the direction of automatic disconnection of emergency protection devices, circuit devices, emergency protection circuit devices, etc. It can solve the problems such as interrupting tasks, and achieve the effect of small on-state loss and low cost.

Inactive Publication Date: 2017-03-08
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the all-solid-state circuit breaker, the present invention has small on-state loss and low manufacturing cost, and at the same time solves the problem that the traditional mechanical circuit breaker cannot complete the breaking task of high voltage and large current

Method used

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  • Self-oscillation type direct current breaker and control method thereof
  • Self-oscillation type direct current breaker and control method thereof
  • Self-oscillation type direct current breaker and control method thereof

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Embodiment Construction

[0021] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0022] figure 1 It is a schematic diagram of the topology structure of the self-excited oscillation circuit breaker of the first embodiment of the present invention. See figure 1 A self-excited oscillating DC circuit breaker includes a parallel circuit breaker body HSS, an LC oscillating circuit, and a protection branch. The circuit breaker body HSS is used to control the on-off of the high-voltage direct current transmission system. The circuit breaker body includes an operating mechanism. The operating mechanism is used to control the separation or contact of the contacts of the circuit breaker body to achieve opening or closing. The preferred...

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Abstract

The invention discloses a self-oscillation type direct current breaker. The self-oscillation type direct current breaker comprises a control system, a protection branch, a parallel breaker body and an LC oscillating circuit, wherein the breaker body is used for controlling the switching-on and switching-off of a high-voltage direct-current power transmission system, the breaker body comprises an operating mechanism, and the operating mechanism is used for driving two contacts of the breaker body to be separated or contacted so as to realize switching-on or switching-off; the LC oscillating circuit consists of a capacitor and an inductor connected in series; the protection branch is used for carrying out voltage clamping when the voltage at two ends of the breaker body and / or the voltage at two ends of the LC oscillating circuit are / is smaller than a voltage preset value; the control system is used for controlling the switching-on and switching-off of the breaker body through the operating mechanism; the operation of controlling the switching-on and switching-off of the breaker body through the operating mechanism by the control system comprises the following steps: firstly controlling the two contacts of the breaker body to be separated to generate an electric arc by the control system, and then controlling the two contacts to be separated at an insulation distance when the current passing through the breaker body is smaller than or equal to a current set value.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a self-excited oscillation DC circuit breaker and a control method thereof. Background technique [0002] Compared with the traditional AC transmission method, the advantages of DC transmission are: the cost of transmission lines per unit power is lower, the active power loss of the line is very small, and there is no reactive power loss. It is not only suitable for submarine cable transmission, but also has no system stability problems, and the adjustment speed is fast. , convenient and reliable operation, so the application of DC transmission technology is increasingly urgent. Especially in some special fields, DC systems have been fully applied, such as urban rail transit power supply systems, large ship power supply systems, and other fields of DC systems have been greatly developed. However, compared with the flexible and diverse connection methods of the AC transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087H02H3/20H02H3/02
CPCH02H3/025H02H3/087H02H3/202
Inventor 李金忠高飞冯英徐征宇王琳郭佳豪张书琦徐丹赵晓宇崔彧菲赵志刚段嘉炜孙建涛易强汪可
Owner CHINA ELECTRIC POWER RES INST
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