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Transverter of mixed soft cut-off current-limiting circuit breaker

A technology of commutation devices and circuit breakers, which is applied to circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit breaker components, etc., can solve problems such as fragile components and large overvoltage, and achieve The effect of extending the service life, reducing switching loss, and reducing the influence of current and voltage change rates

Inactive Publication Date: 2008-04-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current common solid-state commutation circuits mostly adopt the hard shutdown method, which will generate a large instantaneous overvoltage on the device and easily damage the device

Method used

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  • Transverter of mixed soft cut-off current-limiting circuit breaker
  • Transverter of mixed soft cut-off current-limiting circuit breaker
  • Transverter of mixed soft cut-off current-limiting circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] A commutation device for a hybrid soft-off current-limiting circuit breaker for a circuit breaker, which is composed of a diode bridge circuit and an insulated gate bipolar transistor T1, the collector terminal of the insulated gate bipolar transistor T1 and the diode bridge circuit D1 and D2 The common cathode terminal of the insulated gate bipolar transistor T1 is connected to the common anode terminal of the diode bridge circuit D3 and D4, between the common cathode terminal of the diode bridge circuit D1 and D2 and the common anode terminal of D3 and D4 The buffer circuit 1 is connected across the buffer circuit 1. The buffer circuit 1 is composed of a diode D11, a resistor R11 and a capacitor C11. The diode D11 and the resistor R11 are connected in parallel and then connected in series with the capacitor C11. The two ends of the capacitor C11 of the buffer circuit 1 are connected in parallel to the absorbing circuit 2. and the reset circuit 3, the absorption circuit...

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PUM

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Abstract

The inversion device of the composite soft turn-off current limiting circuit breaker relates to the inversion device used in the composite flexible turn-off current limiting circuit breaker and is composed of the diode bridge circuit and insulated gate bipolar transistor T1. The collector terminal of the insulated gate bipolar transistor connects with the general cathode terminal of the diode bridge circuit D1 and D2 and the emitter terminal of the insulated gate bipolar transistor connects with the general positive terminal of the diode bridge circuit D3 and D4. There is a buffer circuit 1 connecting with the general cathode terminal of the diode bridge circuit D1 and D2 and the positive terminal of D3 and D4 and the buffer circuit is made up of the diode D11, resistance R11 and capacitance C11. The diode connects with the resistance parallelly and then they connect with the capacitance in series. The two ends of the capacitance of the buffer circuit connect with the absorber circuit 2 and reset circuit 3 respectively and parallelly.

Description

technical field [0001] The invention belongs to power transmission and distribution devices, in particular to a commutation device for a hybrid soft-off current-limiting circuit breaker for circuit breakers. Background technique [0002] With the expansion of power system scale and the increase of electric equipment, users put forward higher requirements for power quality. At present, mechanical circuit breakers, such as oil circuit breakers and air circuit breakers, are widely used in AC transmission, although their advantages are obvious, such as stable conduction and strong load capacity. However, its shortcomings are becoming more and more prominent with the improvement of power quality requirements. Because it cannot provide real-time, flexible, continuous and fast service actions, it is easy to expand the accident, destroy the stability of the system, and it is difficult to meet the sharply increased outage. Capacity requirements; when the load is disconnected, arcs a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/30H01H9/54H01H33/04H01H73/18H02H9/04
Inventor 郑建勇梅军秦申蓓丁祖军苏麟吴恒荣陈军
Owner SOUTHEAST UNIV
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