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IGBT series power module and power supply system and control method thereof

A technology of power module and power supply system, which is applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problem of no auxiliary voltage equalization function, etc., and achieve the effect of small power loss and fast voltage equalization speed.

Inactive Publication Date: 2018-01-19
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the power supply system of the IGBT series power module only has a single function of supplying power to the IGBT, and there is no auxiliary voltage equalization function

Method used

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  • IGBT series power module and power supply system and control method thereof
  • IGBT series power module and power supply system and control method thereof
  • IGBT series power module and power supply system and control method thereof

Examples

Experimental program
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Embodiment 1

[0028] Embodiment 1 of the present invention provides a power supply system for an IGBT series power module, in which the structure diagram of the IGBT series power module is as follows figure 1 As shown, it mainly includes IGBT1 and IGBT2, and also includes IGBT3 and IGBT4; if IGBT1 and IGBT2 are turned on, IGBT3 and IGBT4 need to perform voltage equalization; conversely, if IGBT3 and IGBT4 are turned on, IGBT1 and IGBT2 need to perform voltage equalization. figure 1 The C in represents the electric capacity, U dc Indicates the DC voltage of the IGBT series power module.

[0029] The structure diagram of the power supply system provided by Embodiment 1 of the present invention is as follows figure 2 As shown, assuming that IGBT3 and IGBT4 are turned on, and IGBT1 and IGBT2 need to be voltage balanced, the power supply system provided by Embodiment 1 of the present invention mainly includes a first power supply circuit for powering IGBT1 and a second power supply circuit for...

Embodiment 2

[0048] Embodiment 2 of the present invention provides a power supply system for an IGBT series power module, in which the structure diagram of the IGBT series power module is as follows figure 1 As shown, it mainly includes IGBT1 and IGBT2, and also includes IGBT3 and IGBT4; if IGBT1 and IGBT2 are turned on, IGBT3 and IGBT4 need to perform voltage equalization; conversely, if IGBT3 and IGBT4 are turned on, IGBT1 and IGBT2 need to perform voltage equalization. figure 1 The C in represents the electric capacity, U dc Indicates the DC voltage of the IGBT series power module.

[0049] The structure diagram of the power supply system provided by Embodiment 2 of the present invention is as follows image 3 As shown, assuming that IGBT1 and IGBT2 are turned on, IGBT3 and IGBT4 need to be voltage balanced, so the power supply system provided by Embodiment 2 of the present invention mainly includes a third power supply circuit for powering IGBT3 and a fourth power supply circuit for p...

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Abstract

The invention provides an IGBT series power module and a power supply system and control method thereof. The power supply system is connected with each series IGBT in parallel separately, and comprises a dynamic voltage-sharing branch and an energy-taking branch connected in parallel, and an energy-taking power supply connected with an energy-taking capacitor of the energy-taking branch in parallel; when a dynamic voltage-sharing capacitor discharges, the dynamic voltage-sharing branch supplies power for the energy-taking power supply through the energy-taking capacitor; when the dynamic voltage-sharing capacitor is charged, the direct current voltage of the IGBT series power module charges the dynamic voltage-sharing capacitor, so that power supply for the IGBT in the power module is realized finally, and an auxiliary voltage-sharing function is also achieved. According to the technical scheme provided by the invention, by connecting the dynamic voltage-sharing branch with the energy-taking power supply in parallel, the automatic energy taking of the IGBT series power module is realized; and in addition, according to the technical scheme, the energy-taking power supply can assistthe series IGBTs to realize voltage sharing, and relatively low electric energy loss and relatively high voltage balance speed are realized in the voltage sharing process.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a power supply system and a control method of an IGBT series power module. Background technique [0002] A modular multilevel converter (MMC) composed of cascaded power modules is a typical high-voltage large-capacity converter topology. In a modular multilevel converter, the number of power modules will increase with the increase of the MMC's operating voltage level. Therefore, when the MMC's operating voltage level is higher, the MMC will be larger in size and higher in cost. . In order to reduce the size of the MMC and save costs, the power module composed of IGBT series can reduce the number of power modules by multiples, but the voltage equalization problem of the IGBTs connected in series in the IGBT series power module becomes the key factor for the stable operation of the MMC; in addition , because the potential of the power module in the MMC is relatively hig...

Claims

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Application Information

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IPC IPC(8): H02M3/07
Inventor 徐云飞黄杰任西周周哲张淆雨雷晰李卫国乔光尧康伟曾洪涛石秋雨孙海江刘婷婷陈明庆
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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