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An IGBT-based all-solid-state direct current circuit breaker and a control method thereof

A DC circuit breaker, all-solid-state technology, applied in the field of power electronics, can solve the problems of reducing the volume and increasing the current capacity of the circuit breaker, and achieves the effect of reducing the current change rate, short turn-off time, and protecting the IGBT module.

Inactive Publication Date: 2019-06-25
ZHUZHOU CRRC TIMES SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing high-voltage DC circuit breaker cannot effectively avoid arcing, increase the flow capacity of the circuit breaker, and reduce the volume

Method used

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  • An IGBT-based all-solid-state direct current circuit breaker and a control method thereof
  • An IGBT-based all-solid-state direct current circuit breaker and a control method thereof
  • An IGBT-based all-solid-state direct current circuit breaker and a control method thereof

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Embodiment 1

[0037] In order to solve the above-mentioned technical problems in the prior art, an embodiment of the present invention provides an IGBT-based all-solid-state DC circuit breaker.

[0038] figure 1 A schematic structural diagram of an IGBT-based all-solid-state DC circuit breaker according to Embodiment 1 of the present invention is shown.

[0039] refer to figure 1 In this embodiment, the IGBT-based all-solid-state DC circuit breaker includes a drive control circuit 1 , a power electronic circuit 2 , a detection circuit (not shown in the drawings), a laminated busbar 4 and a radiator 3 .

[0040] The drive control circuit 1 is connected to the power electronic circuit 2 and the detection circuit respectively, the drive control circuit 1 is arranged above the laminated busbar 4, the power electronic circuit 2 and the detection circuit are arranged under the laminated busbar 4, and the radiator 3 is arranged on the power Below the electronic circuit 2 and the detection circui...

Embodiment 2

[0053] This embodiment is based on the first embodiment, and provides another implementation manner for the two-way flow assembly in the first embodiment.

[0054] Figure 5 It shows the circuit diagram of the power electronic circuit 2 in the IGBT-based all-solid-state DC circuit breaker of Embodiment 2 of the present invention; refer to Figure 5 , the power electronic circuit 2 includes correspondingly connected bidirectional flow-through components and IGBT module components.

[0055] Specifically, the bidirectional current flow assembly includes two diodes connected in antiparallel to the main circuit, and each diode is connected in series with an IGBT module assembly. The IGBT module assembly includes at least two IGBT modules connected in parallel. Furthermore, the bidirectional current flow component includes a diode D5 and a diode D6, and the diode D5 and the diode D6 are connected in parallel to the main circuit. The diode D5 and the diode D6 can effectively contr...

Embodiment 3

[0059] The embodiment of the present invention also provides the control method of the IGBT-based all-solid-state DC circuit breaker described in the first or second embodiment.

[0060] Figure 6 A schematic flowchart of the control method of the IGBT-based all-solid-state DC circuit breaker according to Embodiment 3 of the present invention is shown.

[0061] refer to Figure 6 In this embodiment, the control method of the IGBT-based all-solid-state DC circuit breaker is applied to the IGBT-based all-solid-state DC circuit breaker described in the first or second embodiment above, including:

[0062] Step S301, obtaining the voltage signal and current signal to be detected in the application circuit, and the temperature signal of the IGBT-based all-solid-state DC circuit breaker.

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Abstract

The invention discloses an all-solid-state direct current circuit breaker and a control method thereof. The all-solid-state DC circuit breaker comprises a drive control circuit and a power electroniccircuit which are correspondingly connected. The driving control circuit is used for sending a control signal to the power electronic circuit. The power electronic circuit comprises a bidirectional through-flow assembly and an IGBT module assembly which are correspondingly connected. The bidirectional through-flow assembly is used for realizing bidirectional through-flow of the all-solid-state direct-current circuit breaker; and the IGBT module assembly is used for realizing connection and disconnection of the all-solid-state direct-current circuit breaker according to the control signal and controlling the magnitude of current passing through the all-solid-state direct-current circuit breaker during connection. The all-solid-state direct-current circuit breaker can effectively solve the problems that arc discharge and arc extinction are difficult when the circuit breaker is switched off, and the through-current capacity of an existing all-solid-state direct-current circuit breaker isnot high, and the all-solid-state direct-current circuit breaker is simple in structure, compact in design, low in cost and convenient to install and maintain.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to an IGBT-based all-solid-state DC circuit breaker and a control method thereof. Background technique [0002] With the increasing application of DC power system in high-voltage DC power transmission and distribution, new energy grid connection, ship drive, rail transit and other fields, high-voltage DC circuit breakers are the key to carrying and breaking the working current of DC power system and various fault currents. There are more and more domestic researches on control and protection equipment. [0003] Today's high-voltage DC circuit breakers are mainly divided into mechanical high-voltage DC circuit breakers, all-solid-state high-voltage DC circuit breakers and hybrid high-voltage DC circuit breakers. Existing mechanical high-voltage DC circuit breakers use mechanical switches to cut off the high-voltage DC current, which has a high shut-off capabili...

Claims

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Application Information

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IPC IPC(8): H03K17/0814H03K17/567
Inventor 时海定李保国黄南陈燕平熊辉翟龙李炘邵强石廷昌胡长风
Owner ZHUZHOU CRRC TIMES SEMICON CO LTD
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