Unlock instant, AI-driven research and patent intelligence for your innovation.

Direct-current solid-state circuit breaker based on cathode short-circuit grid-control thyristors

A solid-state circuit breaker, thyristor technology, applied in circuit devices, emergency protection circuit devices, automatic disconnection emergency protection devices, etc. Simple to drive, simple to trigger effects

Active Publication Date: 2022-05-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above factors all restrict the development of DC transmission (distribution) network

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Direct-current solid-state circuit breaker based on cathode short-circuit grid-control thyristors
  • Direct-current solid-state circuit breaker based on cathode short-circuit grid-control thyristors
  • Direct-current solid-state circuit breaker based on cathode short-circuit grid-control thyristors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail:

[0022] Such as figure 1 Shown is a circuit topology diagram of a DC circuit breaker based on CS-MCT of the present invention, including a main circuit, a commutation circuit, a protection unit, a monitoring unit and a gate control unit. The basic working principle of the circuit is:

[0023] Such as figure 2 and image 3 As shown, when the DC system is in normal working condition, T 1 In the conduction state, T 2 In the off state; the current flows through the main circuit on the one hand, and on the other hand through the V D -C 2 -R loop to the second capacitor C 2 precharge on and V D The same voltage, the voltage polarity is positive on the right and negative on the left. When the load Z L at t 1 When a short-circuit fault occurs at any time, the short-circuit current of the main circuit will rise sharply, and its rising rate depends on the DC ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of electronics, and particularly relates to a direct-current solid-state circuit breaker based on a cathode short-circuit grid-control thyristor. The circuit comprises a main loop composed of a DC power supply VD, a first CS-MCT (T1) and a load (ZL), a commutation loop composed of a second CS-MCT (T2), a first capacitor (C1), a second capacitor (C2), a transformer (T), a resistor (R) and a diode (D), a protection unit composed of a piezoresistor (MOV), a monitoring unit composed of a Hall current sensor and a voltage comparator, and a grid control unit. The device is characterized in that a CS-MCT with an internal inherent parasitic thyristor, low on-resistance and high di / dt capability is used as a semiconductor switch, and rapid interruption of fault current can be realized by combining a monitoring unit and a grid control unit. Compared with a traditional solid-state circuit breaker, the CS-MCT-based solid-state circuit breaker not only has the capability of interrupting fault current, but also has the advantages of low power consumption and high response speed.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, and specifically relates to a DC solid-state circuit breaker based on a cathode-short MOS-Controlled Thyristor (CS-MCT for short). Background technique [0002] In recent years, with the development of economy and technology, emerging fields such as distributed microgrids and DC data centers have developed rapidly. Correspondingly, DC transmission (distribution) networks have also received more and more attention. Compared with the traditional AC transmission (distribution) network, it not only has higher energy efficiency but also has better reliability. However, due to the small impedance of the DC transmission (distribution) network system, once a short-circuit fault occurs, the fault current will rise sharply, which is easy to correct. The entire system causes irreversible damage. At the same time, compared with the traditional AC transmission (distribution) network, the DC transmissi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/72H02H3/087
CPCH03K17/72H02H3/087H03K2217/0036Y02E60/60
Inventor 陈万军邢鹏程刘超张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA