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A power module redundant power supply circuit and control method based on a breakdown diode

A technology for breakdown diodes and power modules, which is applied to the redundant energy supply circuit and control of power modules, and the field of energy harvesting of power unit modules. It can solve problems such as power module system outages, and achieve protection triggering functions and high protection accuracy. , the effect of increasing loss

Active Publication Date: 2019-01-25
NR ELECTRIC CO LTD +1
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the power module cannot perform bypass after the power board fails, resulting in system shutdown, and the possible faulty operation under the unknown bypass state. A power module based on breakdown diode is proposed. Group redundant energy supply circuit and control method

Method used

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  • A power module redundant power supply circuit and control method based on a breakdown diode
  • A power module redundant power supply circuit and control method based on a breakdown diode
  • A power module redundant power supply circuit and control method based on a breakdown diode

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Embodiment Construction

[0035] The implementation of the technical solution will be further described in detail below in conjunction with the accompanying drawings.

[0036] Example of redundant energy acquisition:

[0037] refer to figure 1 , the power module redundant energy supply circuit based on breakdown diodes protected by the present invention, the power module at least includes a power semiconductor unit, a sub-module capacitor C M , bypass switch K B , a power supply board and a control board; the power module redundant power supply circuit based on a breakdown diode is composed of a first resistor R1, a second resistor R2, a third resistor R3, a first regulator tube VD1, a first breakdown diode Diode D BO and a connecting module; the connecting module is a diode, a wire, a mechanical switch, a relay, an electronic switch or a semiconductor controllable device; one end of the first resistor R1 is connected to the submodule capacitor C M The positive pole is connected, the other end of t...

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Abstract

The invention discloses a power module redundant power supply circuit and a control method based on a breakdown diode. The power module comprises at least one power semiconductor unit, a sub-module capacitor CM, a bypass switch KB, a power board and a control board. The redundant power supply circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a first voltage regulator VD1, a first breakdown diode DBO, and a connection module. As that pow board card fails, A voltage-sharing resistor is used to divide and charge the energy storage capacitor of the bypass switch, and a breakdown diode is used to supply power to the control board after the breakdown of the breakdown diode, so as to ensure the reliable closing of the bypass switch and the upward transmission of the sub-module state after the power board fault, thereby avoiding the system shutdown and the operation with fault under the unknown state of the bypass switch, and improving the safety and reliabilityof the system. As that energy of the voltage-equalizing resistor loop is utilize, the system operation economy is improved, the system adopt a completely passive structure, is simple and reliable, has practicability and low cost.

Description

technical field [0001] The invention discloses a power module redundant energy supply circuit and a control method based on a breakdown diode (Break over Diode, BOD), and relates to the field of flexible AC and DC power transmission, in particular to the energy harvesting technology of a power unit module. Background technique [0002] Cascaded multilevel converters are widely used in UHV AC-DC transmission, reactive power compensation, DC distribution network and other electric power, rail transit and new energy occasions. In order to ensure the safe and stable operation of cascaded multilevel converters, power modules are required to design a fault bypass function. When a fault occurs inside a sub-module, the bypass function will bypass the faulty module to avoid fault expansion and maintain system continuity. operation to avoid economic loss. [0003] However, as the energy source for all control and protection functions inside the power module, the power board has a cer...

Claims

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Application Information

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IPC IPC(8): H02M1/32
CPCH02M1/32H02M1/0006H02M1/325
Inventor 汪涛虞晓阳李汉杰常远文继锋曹东明
Owner NR ELECTRIC CO LTD
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