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Method and device for controlling interpolar power of three-terminal hybrid direct current, and storage medium

A technology of mixing DC and DC power, which is applied in the direction of circuit devices, AC network circuits, power transmission AC networks, etc., can solve the problem that the power can not be increased first at the Guangdong end, and achieve clear control structure, high reliability, and high practicability Effect

Active Publication Date: 2020-12-04
CSG EHV POWER TRANSMISSION +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the peer-to-peer mode, the Guangdong and Guangxi VSCs distribute power through a drooping curve, and the distribution coefficient is usually fixed. If unipolar blocking occurs, the Guangdong and Guangxi VSCs will synchronously increase the forwarding power according to a fixed ratio. Power, unable to achieve the control target of Guangdong end to give priority to increasing power

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  • Method and device for controlling interpolar power of three-terminal hybrid direct current, and storage medium
  • Method and device for controlling interpolar power of three-terminal hybrid direct current, and storage medium
  • Method and device for controlling interpolar power of three-terminal hybrid direct current, and storage medium

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Embodiment Construction

[0050] 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.

[0051] see figure 2 , is a schematic flowchart of a method for controlling the inter-electrode power of a three-terminal hybrid direct current provided in Embodiment 1 of the present invention, including:

[0052] S101. Use the conventional DC terminal to control the total DC power, and use the first flexible DC terminal and the second flexible DC terminal to simultaneously control the DC bus voltage and the reactive power exchanged between the local terminal and ...

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Abstract

The invention discloses a method for controlling interpolar power of three-terminal hybrid direct current. The method comprises the following steps of: simultaneously controlling direct current busbarvoltage and reactive power exchanged between a local terminal and an alternating current system by adopting a first flexible direct current terminal and a second flexible direct current terminal; calculating a total active power value needing to be transmitted by a direct-current perfect pole after a single pole is locked; obtaining a first droop control curve and a second droop control curve; and when single-pole locking occurs, controlling the interpolar transmission power through the first droop control curve and the second droop control curve according to the relationship between the direct-current power which can be transmitted by the residual pole of a conventional direct-current end and the total active power value. According to the three-terminal hybrid direct current interpolar power control method disclosed by the invention, rapid interpolar power transfer of the three-terminal hybrid direct current can still be realized in a peer-to-peer control mode when a single-pole locking fault occurs in the three-terminal hybrid direct current. The invention further discloses a device and a storage medium.

Description

technical field [0001] The present invention relates to the technical field of operation, analysis and dispatching of electric power systems, in particular to a control method, device and storage medium of three-terminal hybrid direct current inter-electrode power. Background technique [0002] With the development of power system technology and the expansion of the scale of external power transmission, the multi-terminal hybrid DC transmission technology will also be put into use in the 500kV power grid. The input operation characteristics are more complex, and the new multi-terminal hybrid DC control mode is diverse, and the control logic switching process is more complicated. [0003] In the existing technology, the Kunliulong DC sending terminal is applied to the new multi-terminal hybrid DC control mode, and its structure diagram is as follows figure 1 As shown, the sending end of Kunliulong DC is conventional DC (LCC), and the two receiving ends are flexible DC (VSC)....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/48H02J3/50H02J3/00
CPCH02J3/36H02J3/48H02J3/50H02J3/0073Y02E60/60
Inventor 蔡永梁李庆江任成林孙帮新郝江涛张野洪潮
Owner CSG EHV POWER TRANSMISSION
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