High position energy-taking power supply device of submodule of MMC valve and realizing method thereof

A technology of high-level energy extraction and power supply device, which is applied in the direction of output power conversion device, electrical components, adjusting electrical variables, etc. Compatible with EMC characteristics, high isolation voltage, and the effect of wide input voltage range

Active Publication Date: 2013-04-17
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Modular multi-level flexible direct current transmission technology is different from traditional high-voltage direct current transmission. Its sub-module controllers, drivers and protection devices require a large power supply, which cannot be realized through conventional energy harvesting methods.

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  • High position energy-taking power supply device of submodule of MMC valve and realizing method thereof

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The circuit topology of a high-level energy-taking power supply device for an MMC valve sub-module provided by the present invention is as follows: figure 1 As shown, it includes the main circuit, the electromagnetic interference circuit arranged at the input and output ends of the main circuit, and the fault output circuit arranged at the output end of the main circuit.

[0027] 1. Main circuit design:

[0028] The main circuit of the present invention adopts a two-stage switching power supply circuit topology, wherein the first-stage switching power supply circuit converts the input high-voltage DC voltage of 3000V into a low-voltage DC power supply of 200V; the second-stage switching power supply circuit converts the first-stage output The 200V medium and low voltage DC power supply is converted into the requi...

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Abstract

The invention relates to the design field of a switch power supply, in particular to a high position energy-taking power supply device of a submodule of an MMC valve and a realizing method thereof. The high position energy-taking power supply device supplies power to a controller, a driver and a protective device of the submodule of the MMC valve. The device is characterized in that the device comprises a main circuit, electromagnetic interference circuits respectively arranged at input and output ends of the main circuit, and a fault output circuit arranged at the output end of the main circuit. The fault output end of the fault output circuit is connected with the controller of the submodule through optical fiber. The device provided by the invention has the characteristics of wide input voltage range, high isolation voltage and high reliability. Through serial input of a multi-flyback circuit, the input voltage stress is reduced, the reliability of the circuit is improved, and the electromagnetic compatibility (EMC) characteristic of the power supply is improved. Two-level isolation makes circuit outputs separated from each other, and the output short-circuit does not affect input.

Description

technical field [0001] The invention relates to the design field of switching power supplies, in particular to a high-position energy-taking power supply device of an MMC valve sub-module and a method for realizing the same. Background technique [0002] The modular multi-level flexible DC transmission converter valve sub-module has the characteristics of high voltage level and harsh working electromagnetic environment. Therefore, there are certain difficulties in the power supply of the controller, driver and protection device inside the sub-module. The power supply inside the sub-module must be isolated and reliable. If a conventional external switching power supply is used, the isolated voltage value is the bus voltage of the converter valve, which is extremely tens of kV or hundreds of kV. At present, there is no technology that can achieve such a high isolation voltage. Therefore, the internal power supply of the sub-module can only be obtained through the internal en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00H02M1/44H02M1/32
Inventor 邓卫华吕铮杨卫刚客金坤冯静波
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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