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A power module with self-protection function and its control method

A technology of power modules and protection functions, which is applied in the field of power modules with self-protection functions, can solve problems such as system tripping, and achieve the effect of avoiding system tripping

Active Publication Date: 2022-03-29
NR ELECTRIC CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the shortcomings of the existing solutions, and provides a power module with self-protection function and its control method to solve the problem of system tripping when the bypass switch of the power module refuses to close

Method used

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  • A power module with self-protection function and its control method
  • A power module with self-protection function and its control method
  • A power module with self-protection function and its control method

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specific Embodiment 1

[0026] A specific embodiment 1 of a power module with self-protection function of the present invention includes a supporting capacitor, a half-bridge circuit, and a third full-control switching device and a power module control circuit. The third full-control switching device connected in parallel to the output port of the power module; when the power module internal half-bridge circuit fails, the control circuit of the power module maintains the conduction path of the system current through the switch control of the third fully-controlled switching device, and controls the module support capacitor voltage Within a reasonable range, the power supply of the control loop of the power module is guaranteed, and the entire power module is kept in a controllable working state.

[0027] Wherein, the half-bridge circuit includes a first fully-controlled switching device and a first anti-parallel diode, a second fully-controlled switching device and a second anti-parallel diode, and th...

Embodiment 2

[0030] The main circuit of the power module is composed of a supporting capacitor, a half-bridge circuit and a parallel protection IGBT at the output port of the module. The half-bridge IGBT circuit includes a first fully-controlled switching device VT1, an anti-parallel diode VD1, and a second fully-controlled switch device VT2 and an anti-parallel diode VD2, the emitter of the first full-control switching device VT1 is connected to the collector of the second full-control switching device VT2, and the positive pole of the DC support capacitor is connected to the first full-control switching device VT1 The collectors are connected, the DC support negative pole is connected to the emitter of the second fully-controlled switching device VT2, the output port of the power module is the emitter of VT1 and the emitter of VT2, and the third fully-controlled switching device VT3 is connected in parallel to the output of the power module. The port is used as a protective IGBT, and the ...

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Abstract

The present invention proposes a power module with a self-protection function. The power module includes a supporting capacitor, a half-bridge circuit, a third full-control switching device and a power module control circuit, and the third full-control switching device is connected in parallel to the output of the power module. port; when the power module control circuit fails in the internal half-bridge circuit of the power module, it maintains the conduction path of the system current through the switching control of the third full-control switching device, and controls the voltage of the module supporting capacitor within a reasonable range, so that the power The power supply of the module control loop is guaranteed, keeping the entire power module in a controllable working state.

Description

technical field [0001] The invention belongs to the technical field of high-voltage and high-power flexible DC power transmission and transformation, and in particular relates to a power module with a self-protection function. Background technique [0002] The flexible direct current transmission converter valve is a device that converts high-voltage and large-current alternating current into high-voltage and high-current direct current, and transmits the electric energy to the terminal through overhead lines or cables, and then converts the high-voltage and large-current direct current into high-voltage alternating current at the terminal. Through the flexible DC transmission converter valve, multiple regional power grids can be interconnected, and the active power and reactive power transmitted by the system can be quickly controlled, which greatly enhances the flexibility of power transmission. [0003] At present, most power modules in flexible HVDC converter valves adop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48H02M1/32
CPCH02M7/48H02M1/32
Inventor 张中锋袁庆伟陆翌黄晓明李继红裘鹏谢晔源宣晓华倪晓军丁超王柯祁琦殷冠贤欧阳有鹏
Owner NR ELECTRIC CO LTD
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