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Solid-state DC circuit breaker and its control method based on capacitor energy storage

A DC circuit breaker and capacitor energy storage technology, which is applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems of limiting the application of circuit breakers and not having the ability to turn off, and achieves small voltage drop, low loss, The effect of fewer components

Active Publication Date: 2019-06-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the thyristor is a semi-controlled device, it does not have the ability to turn off, which limits its application in circuit breakers.

Method used

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  • Solid-state DC circuit breaker and its control method based on capacitor energy storage
  • Solid-state DC circuit breaker and its control method based on capacitor energy storage
  • Solid-state DC circuit breaker and its control method based on capacitor energy storage

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] like figure 1 As shown, the solid-state DC circuit breaker based on capacitor energy storage of the present invention includes a main switch thyristor T 1 , Current limiting reactor L 1 And the freewheeling circuit Ⅰ of the current-limiting reactor, and the energy storage shutdown unit Ⅱ. where the main switching thyristor T 1 The anode of the thyristor is connected to the positive pole of the DC power supply, and the cathode of the main switch thyristor passes through the current-limiti...

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PUM

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Abstract

The invention provides a solid-state direct current breaker based on capacitor energy storage and a control method. The solid-state direct current breaker includes a main switching thyristor, a current limiting reactor and a follow current circuit of the current limiting reactor, and an energy storage turning-off unit, wherein the anode of the main switching thyristor is connected with the positive electrode of a direct current power supply, the cathode of the main switching thyristor is connected with a load through the current limiting reactor, the follow current circuit of the current limiting reactor is connected with two ends of the current limiting reactor in parallel, and the energy storage turning-off unit is connected between the cathode of the main switching thyristor and the negative electrode of the direct current power supply. The solid-state direct current breaker based on capacitor energy storage adopts an analog circuit to realize control, a control circuit is simple and response delay is small.

Description

technical field [0001] The present invention relates to a solid-state DC circuit breaker and a control method thereof, in particular to a solid-state DC circuit breaker based on capacitive energy storage and a control method thereof. Background technique [0002] With the development of power electronic devices, the advantages of DC transmission and distribution technology have become increasingly prominent. Among renewable energy sources, solar photovoltaics and fuel cells are themselves DC power sources, and the use of wind energy mainly adopts AC-DC-AC conversion, so mainstream renewable energy sources can all be regarded as DC power sources. On the load side, DC loads such as computers, LEDs, and electric vehicles are developing rapidly and have been widely used, and because adjustable-speed motor loads are mainly driven by AC-DC-AC converters, they can also be regarded as DC loads. . Using a DC power grid to realize the power supply from the DC power source to the DC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/087
CPCH02H3/087
Inventor 姜建国周中正叶舒刘聪李俊杰乔树通
Owner SHANGHAI JIAO TONG UNIV
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