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A redundant energy-taking circuit of a power module bypass switch and its control method

A bypass switch and power module technology, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as system outage, failure of power modules to bypass successfully, failure of the control board energy storage circuit to work normally, etc., to achieve Improvement of reliability, effect of improving reliability

Active Publication Date: 2021-11-12
NR ELECTRIC CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the power board inside the power module fails, the energy storage circuit of the control board and the bypass switch will not work normally, which will cause the trigger circuit of the bypass switch to fail to work, and the power module will not be bypassed successfully, resulting in system shutdown. transport

Method used

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  • A redundant energy-taking circuit of a power module bypass switch and its control method
  • A redundant energy-taking circuit of a power module bypass switch and its control method
  • A redundant energy-taking circuit of a power module bypass switch and its control method

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Embodiment Construction

[0053] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] Such as figure 1 As shown, it is a first embodiment of a redundant energy-taking circuit of a power module bypass switch provided by the present invention, and the power module includes at least one power semiconductor device, a first capacitor C1, and a first bypass switch K1; The energy harvesting circuit includes a main drive circuit, a power board, a control board, a first transformer TR1, a rectifier circuit and an overvoltage protection trigger control module; the main drive circuit includes a second switch K2 and a second capacitor C2; The primary side of the first transformer TR1 is connected in parallel between the X1 terminal and the X2 terminal of the power module, and the secondary side is connected to the input of the AC side of the rectifier circuit; the positive DC output of the rectifier circuit...

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Abstract

The invention discloses a redundant energy-taking circuit of a bypass switch of a power module and a control method thereof. The power module includes a bridge circuit, a first capacitor and a first bypass switch, and the energy-taking circuit includes a main drive circuit. , a power supply board, a control board, a first transformer, a rectifier circuit and an overvoltage protection trigger control module, the main drive circuit includes a connected second switch and a second capacitor; the power supply board obtains energy from the first capacitor and supplies it to the The second capacitor is charged; the control board controls the closing of the first bypass switch by triggering the second switch; the overvoltage protection trigger control module samples the output DC voltage of the rectifier circuit, and controls the closing of the first bypass switch through overvoltage protection judgment brake. This technical solution can provide another energy-taking path for the bypass switch when the power supply board of the converter power module fails, and at the same time realize the reliable closing of the bypass switch of the power module, reducing the probability of system outage. Both economically and technically have good performance.

Description

technical field [0001] The invention belongs to the field of power electronics, in particular to a redundant energy-taking circuit of a bypass switch of a power module and a control method thereof. Background technique [0002] Voltage source converter technology is a new type of commutation technology based on turn-off device IGBT (insulated gate bipolar transistor) and pulse width modulation (PWM) technology. With the application and development of power electronic technology in power systems, power electronic equipment is developing towards high-voltage and large-capacity modularization, especially in the fields of chain static var generators and flexible direct current transmission systems. [0003] The voltage source converter is composed of a large number of power modules connected in series. When the power module fails, the bypass switch is closed to remove the faulty unit and the system does not stop. However, if the power board inside the power module fails, the en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32
CPCH02M1/32
Inventor 祁琦盛晓东谢晔源吴扣林杨幸辰张中锋
Owner NR ELECTRIC CO LTD
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