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Power supply device for high-voltage direct current electronic equipment

A technology of electronic equipment and high-voltage direct current, which can be used in conversion equipment that can be converted into direct current without intermediate conversion, irreversible alternating current power input into direct current power output, electrical components and other directions, which can solve the problems of high cost and difficult manufacturing. , to achieve the effect of reducing insulation level, cost and production difficulty

Active Publication Date: 2017-01-11
XJ ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a power supply device for high-voltage direct current electronic equipment to solve the problems of difficulty in manufacturing and high cost in existing power supply methods

Method used

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  • Power supply device for high-voltage direct current electronic equipment
  • Power supply device for high-voltage direct current electronic equipment
  • Power supply device for high-voltage direct current electronic equipment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In this article, the series (medium voltage, low voltage, inter-stage insulated low voltage) transformer group refers to a transformer group formed by multiple transformers in series. Transformer series refers to the connection of the primary side of the subsequent transformer to the secondary transformer of the previous transformer. Such as figure 2 As shown, the series medium voltage transformer group is composed of three medium voltage transformers 1TFa, 2TFa, and 3TFa in series. The primary side of 1TFa is connected to the power supply, and the secondary side of 3TFa is connected to the high-voltage electronic equipment to be powered. The power supply is a power supply independent of high-voltage electronic equipment, such as a ground potential power supply (such as figure 2 ), the secondary output voltage of the transformer 1TFa is used as the primary input voltage of the second transformer 2TFa, and the output voltage of the second transformer 2TFa is used as the i...

Embodiment 2

[0019] Such as image 3 As shown, this embodiment is different from Embodiment 1 in that the secondary side of the third medium voltage transformer 3TFa is no longer directly connected to the high-voltage DC electronic equipment to be powered, but passes through a low-voltage transformer. Such as image 3 , These low-voltage transformers form two series-connected low-voltage transformer groups (as other embodiments, it can also be more series-connected low-voltage transformer groups), and the first-stage low-voltage transformer of each series-connected low-voltage transformer group is connected to the last-stage medium-voltage transformer The secondary side. The primary side and / or the secondary side of the low-voltage transformer are connected to the high-voltage DC electronic equipment to be powered.

Embodiment 3

[0022] Such as Figure 4 The difference from Embodiment 2 is that the primary side and / or secondary side of the low-voltage transformer is not directly connected to the high-voltage DC electronic equipment to be powered, but passes through the inter-stage insulated low-voltage transformer-the primary side and / or secondary side of each low-voltage transformer The side is connected with a series of inter-stage insulated low-voltage transformer group, and the primary side and / or the secondary side of the inter-stage insulated low-voltage transformer are connected with high-voltage DC electronic equipment to be powered. Inter-stage insulated low-voltage transformers can be used to correspond figure 1 A single IGBT connected in series in the electronic switch, each inter-stage insulated low-voltage transformer group can be used to supply power to a valve section of the electronic switch.

[0023] In this embodiment, the insulation voltage between each inter-stage insulation low-voltag...

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PUM

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Abstract

A power supply apparatus for a high-voltage direct-current electronic device replaces a high-voltage transformer with multiple cascaded medium-voltage transformers, and couples a power source at the ground potential to a high-potential electronic device by using a low-cost ground-potential power-frequency / high-frequency power source transformer and by cascading multiple transformers. The transformers are cascaded in structure, and a system requires that the insulation voltage exceeding a power supply source is shared or equally shared by the cascaded multi-level transformers, thereby reducing the insulation level of the transformer, decreasing the costs of the transformer and simplifying the production, and creating conditions for application of a high-voltage direct-current electronic device.

Description

Technical field [0001] The invention relates to a power supply device for high-voltage direct current electronic equipment. Background technique [0002] High-voltage DC electronic equipment, including IGBTs, thyristors and other power tubes, etc. Such as figure 1 The high-voltage electronic DC circuit breaker shown is composed of a high-voltage DC isolating switch, an auxiliary electronic switch and a main electronic switch. Among them, the auxiliary electronic switch and the main electronic switch are composed of multiple IGBTs connected in series. For such electronic equipment on high-voltage and ultra-high-voltage DC lines, since energy cannot be obtained directly from the DC grid, and the energy required by the electronic equipment is small, power supply is a problem. [0003] Although in theory the use of high-voltage energy-transmitting transformers can achieve high-potential energy transmission, but for high-voltage energy-transmitting transformers, its ground insulation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/10H02M5/12
CPCH02M5/10H02J5/00H02M7/06
Inventor 姚为正张建杨旭何青连马俊民李旭升李生林洪波
Owner XJ ELECTRIC