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Bridge arm collecting protection system suitable for high-capacity MMC (Multi Media Controller) flexible direct-current power transmission system

A flexible DC and power transmission system technology, which is applied in the direction of DC network circuit devices, electrical components, circuit devices, etc., to achieve a large amount of information interaction, convenient function upgrades, and the effect of ensuring reliability and stability

Active Publication Date: 2015-06-10
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

The present invention designs a complete and intelligent control and protection scheme for the bridge arm of the valve base control device VBC. It is understood that there is no similar technical patent for the internal control and protection method of the MMC converter sub-module at home and abroad.

Method used

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  • Bridge arm collecting protection system suitable for high-capacity MMC (Multi Media Controller) flexible direct-current power transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Such as figure 1 As shown, a bridge arm summary protection system suitable for large-capacity MMC flexible DC transmission system includes: MMC converter valve, VBC and station control system that perform data interaction in sequence.

[0020] The MMC converter valve includes: 400 bridge arm sub-modules connected in sequence.

[0021] The VBC includes: a bridge arm segmentation control unit, a bridge arm summary control unit, a circulation control unit, an optical CT combination and an interface unit, and a valve monitoring unit; the bridge arm segmentation control unit communicates with the MMC converter valve Data interaction; the bridge arm aggregation control unit performs data interaction with the bridge arm segmentation control unit and the circulation control unit respectively; the optical CT combination and interface unit and the valve monitoring unit communicate with the circulation control unit respectively unit for data interaction.

[0022] The role of the...

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Abstract

The invention provides a bridge arm collecting protection system suitable for a high-capacity MMC (Multi Media Controller) flexible direct-current power transmission system. The bridge arm collecting protection system comprises an MMC converter valve, a VBC (Vehicle Bridge Coupling) and a station control system which sequentially carry out data interaction. According to the bridge arm collecting protection system suitable for the high-capacity MMC flexible direct-current power transmission system, which is provided by the invention, the monitoring function for an integral complete signal interface and the state of a bridge arm sub-module is realized and the reliability and the stability of the operation of the sub module are ensured.

Description

technical field [0001] The invention belongs to the control field of high-voltage and large-capacity flexible direct current transmission converters, and in particular relates to a bridge arm summary protection system suitable for large-capacity MMC flexible direct current transmission systems. Background technique [0002] The modular multi-level converter is composed of multiple sub-modules connected in series. It is necessary to perform different real-time switching controls on individual sub-modules according to the capacitor voltage and the working status of the sub-modules. The more levels, the shorter the real-time control period, and the capacitor Voltage balance control is more difficult to achieve. The high-voltage and large-capacity flexible DC transmission converter valve based on modular multi-level (MMC) technology requires hundreds or even thousands of sub-modules connected in series. Each sub-module is individually controlled by a layered and segmented proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00H02J1/00
CPCY02B90/20
Inventor 贺之渊姜喜瑞杨岳峰高阳王韧秋
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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