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Control method, device, and storage medium for an AC/DC multi-port interconnection system

A technology of interconnected systems and control methods, applied in the direction of electrical components, etc., can solve problems such as low flexibility and poor controllability of the power grid, and achieve the effects of improving operation controllability, increasing stability, and flexible operation control

Active Publication Date: 2022-04-12
CHINA SOUTHERN POWER GRID COMPANY +1
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Problems solved by technology

[0004] The embodiment of the present invention provides an AC-DC multi-port interconnection system and its control method, device, and storage medium, which can effectively solve the problems of poor controllability and low flexibility of the power grid in the prior art

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  • Control method, device, and storage medium for an AC/DC multi-port interconnection system
  • Control method, device, and storage medium for an AC/DC multi-port interconnection system
  • Control method, device, and storage medium for an AC/DC multi-port interconnection system

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] see figure 1 , is a schematic structural diagram of an AC / DC multi-port interconnection system provided by an embodiment of the present invention.

[0032] An embodiment of the present invention provides an AC / DC multi-port interconnection system, including: a first DC terminal for connecting to a first DC voltage level grid, a second DC terminal for connecting to a second DC voltage level grid, and a second DC terminal for connecting to a second DC voltage ...

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Abstract

The invention discloses an AC-DC multi-port interconnection system, comprising: the low-voltage side of the isolation transformer is connected to the first AC terminal through a first circuit breaker, and is also connected to the first modular multilevel converter through a third circuit breaker. The AC side is connected, the DC side of the first modular multilevel converter is connected to the first DC terminal; the high voltage side of the isolation transformer is connected to the second AC terminal through the second circuit breaker, and is also connected to the first DC terminal through the fourth circuit breaker. The AC side of the second modular multilevel converter is connected, and the DC side of the second modular multilevel converter is connected to the second DC terminal. The embodiment of the invention also discloses a control method, device and storage medium of an AC-DC multi-port interconnection system, which solves the problems of poor controllability and low flexibility of the power grid in the prior art.

Description

technical field [0001] The present invention relates to the technical field of direct current transmission, in particular to a control method, device and storage medium for an alternating current and direct current multi-port interconnection system. Background technique [0002] DC transmission has obvious advantages in long-distance and large-capacity power transmission, so it is widely used in west-to-east power transmission channels. The current DC transmission method is mostly point-to-point transmission, and the network has not yet been realized, and the DC transmission system connecting different voltage levels will become an important part of the DC line network. Traditional transformers can only be used to connect AC power grids with different voltage levels. In order to realize the interconnection of DC systems with different voltage levels, research on DC transformers has received extensive attention. [0003] With the maturity of fully-controlled power electronic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J5/00
CPCH02J5/00
Inventor 梅勇洪潮周剑孙鹏伟谢惠藩姚文峰刘洪涛张帆袁豪
Owner CHINA SOUTHERN POWER GRID COMPANY
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