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Two-end DC asynchronous interconnected grid frequency coordinated control method and device

A DC asynchronous and interconnected grid technology, applied in the direction of DC network circuit devices, circuit devices, electrical components, etc., can solve the problems of losing the advantages of grid interconnection and the inability of power grids to support each other

Active Publication Date: 2019-09-06
CHINA SOUTHERN POWER GRID COMPANY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the advantages of DC asynchronous interconnection is that it can isolate disturbances, but the disadvantage is that if no appropriate control strategy is adopted, the power grids will not be able to support each other, and the advantages of grid interconnection will be lost.

Method used

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  • Two-end DC asynchronous interconnected grid frequency coordinated control method and device
  • Two-end DC asynchronous interconnected grid frequency coordinated control method and device
  • Two-end DC asynchronous interconnected grid frequency coordinated control method and device

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Embodiment Construction

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0022] The embodiment of the present invention proposes a double-terminal DC asynchronous interconnection grid frequency coordination control method, see figure 1 , the method includes: 101. For any grid, according to the additional power and the DC power set value of the normal dispatch plan, determine the DC power set value from any grid to othe...

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Abstract

An embodiment of the invention provides a two-end DC asynchronous interconnected grid frequency coordinated control method and device and belongs to the technical field of electric power system analysis. The method comprises the following steps: for any power grid, determining a DC power set value from any power grid to other power grids according to additional power and a DC power set value of anormal scheduling plan, and performing DC additional frequency control; and according to frequency difference integral of any power grid, determining an automatic power generation control mode of anygrid and calculating area control error of the power grid, and performing grid automatic power generation control. Through DC additional frequency control, mutual power support in case of emergency isprovided, and then, through automatic power generation control of each grid, frequency and DC power of each grid can be recovered automatically in general case, so that through coordination of the DCadditional frequency control and the power grid automatic power generation control, frequency coordinated control of each power grid is realized.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of power system analysis, and in particular to a frequency coordination control method and device for a double-terminal DC asynchronous interconnection grid. Background technique [0002] Asynchronous interconnection between multiple power grids through multiple double-ended DC (that is, point-to-point DC) is an important form of power grid. One of the advantages of DC asynchronous interconnection is that it can isolate disturbances, but the disadvantage is that if no appropriate control strategy is adopted, the power grids will not be able to support each other, and the advantages of grid interconnection will be lost. Therefore, the frequency coordinated control of the DC asynchronous interconnected grid should be independent during normal operation and support each other in emergency situations. In order to achieve mutual support, it is necessary to add frequency coordination control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00
CPCH02J1/00H02J1/082
Inventor 陈磊陈亦平曹其鹏张勇陈锦洲刘映尚闵勇唐卓尧徐飞吴问足胡伟高琴杨荣照李慧勇
Owner CHINA SOUTHERN POWER GRID COMPANY
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