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

A solid-state circuit breaker and thyristor technology, applied in the field of high-efficiency DC solid-state circuit breakers, can solve the problems of complex drive and protection design, device reliability and cost constraints, and achieve cost reduction and volume, simple drive control, and compact circuits. Effect

Active Publication Date: 2020-02-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the thyristor is a flow-controlled device, the design of its drive and protection is more complicated.
Wide bandgap semiconductor devices based on SiC and GaN have low conduction power consumption, but their applications are limited by device reliability and cost

Method used

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

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail:

[0020] Such as figure 1 Shown is a circuit topology diagram of a CS-MCT-based bidirectional DC circuit breaker of the present invention, including a main circuit, a commutation circuit, a monitoring unit and a gate control unit. The basic working principle of the circuit is:

[0021] Such as figure 2 As shown, when the DC system is in normal working condition, T 1 In the conduction state, T 2 and T 3 In the off state; the current flows through the main circuit on the one hand, and on the other hand through the V 1 -D 1 -R 1 -L-R-C-R 2 The circuit precharges the commutation capacitor C and V 1 The same voltage, the voltage polarity is positive on the right and negative on the left. When a short-circuit fault occurs on the load side, the short-circuit current of the main circuit will rise sharply, and its rising rate depends on the DC power supply vol...

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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 mainly comprises a main loop composed of a first direct-current power supply (V1), a load (ZL) and a first CS-MCT (T1), a first diode (D1), a second CS-MCT (T2) and a third CS-MCT (T3), wherein thecurrent conversion loop is composed of a first resistor (R1), a second resistor (R2), a current conversion capacitor (C), an inductor (L) and a third resistor (R), and the monitoring unit is composedof a Hall current sensor and a voltage comparator. The method is characterized in that CS-MCT with 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 gate control unit. Compared with a traditional solid-state circuit breaker, the CS-MCT-based solid-state circuit breaker has theadvantages of low power consumption and high response speed.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, and in particular relates to a high-efficiency DC solid-state circuit breaker based on a cathode short-circuit gate-controlled thyristor (Cathode-Short MOS-Controlled Thyristor, CS-MCT for short). Background technique [0002] With the rapid development of economy and society, the demand for all kinds of energy is constantly increasing. Among them, electric energy is regarded as the "blood" of today's information age, promoting the progress of economy and technology. At the same time, users have put forward many new requirements for the power system: environmental friendliness, improvement of safety and reliability, higher quality and economy, and support for two-way interaction between users and the power grid, etc. At present, renewable clean energy based on photovoltaics, wind, and electricity has attracted much attention because of its small environmental cost. In order to more fully...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/04
CPCH03K17/04
Inventor 陈万军许晓锐王方洲刘超张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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