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Flexible direct-current converter valve and bridge arm damping module energy taking circuit thereof

A flexible DC and converter valve technology, applied in the direction of electrical components, output power conversion devices, etc.

Active Publication Date: 2016-01-27
XJ ELECTRIC +1
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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 bridge arm damping module energy-taking circuit to solve the problem of power supply of the damping module

Method used

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  • Flexible direct-current converter valve and bridge arm damping module energy taking circuit thereof
  • Flexible direct-current converter valve and bridge arm damping module energy taking circuit thereof

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] Embodiment of bridge arm damping module energy harvesting circuit

[0019] Such as figure 1 The energy-taking circuit of the bridge arm damping module of the flexible DC converter valve, the bridge arm damping module Z1 obtains electric energy through its two adjacent sub-modules SM1 and SM2. How to avoid the interaction between the bridge arm damping module and the power supply sub-module at the time of failure is a difficult problem that limits the development of this technology by providing electric energy to it through adjacent sub-modules.

[0020] The circuit includes: high-voltage isolated power supply (that is, high-voltage power supply 1 and high-voltage capacitor 2 shown in the figure), blocking diodes D1 and D2, current-limiting resistor R and voltage support capacitor C. The high-voltage isolated power supply input is connected to the DC ...

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Abstract

The invention relates to a flexible direct-current converter valve and a bridge arm damping module energy taking circuit thereof. The energy taking circuit of the bridge arm damping module comprises at least one high-voltage isolation power source which corresponds to sub modules in arrangement. The input of one high-voltage isolation power source is connected with a direct-current support capacitor of one sub module. The output of each high-voltage isolation power source is in power supply connection with a damping module control loop though a current limiting resistor and a voltage support capacitor. The bridge arm damping module energy taking circuit of the invention is highly reliable and low in cost, and does not affect the power supply sub modules.

Description

technical field [0001] The invention relates to an energy-taking circuit of a damping module of a bridge arm of a flexible DC converter valve. Background technique [0002] During the operation of the multi-terminal flexible direct current transmission project, as long as a DC fault occurs at one end, all converter stations will be shut down, seriously affecting the reliability and availability of the multi-terminal flexible direct current project. In order to effectively solve this problem and realize rapid isolation of converter station faults without affecting the stable operation of other sound stations, the method of serially inserting damping modules into the MMC bridge arm is adopted. This method is low in cost, simple in control and high in reliability, and There is no need to modify the existing flexible straight MMC topology. [0003] At the same time, because the bridge arm damping module cannot supply power to itself through the energy storage capacitor like oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00
Inventor 张建范彩云姚钊洪波王宇丁齐元瑞
Owner XJ ELECTRIC
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