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, applied in the direction of DC network circuit devices, information technology support systems, electrical components, etc., to ensure reliability and stability, reduce hardware development costs, and large amounts of information interaction.
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[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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