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Method for suppressing large-amplitude power oscillation of direct-current power transmission project

A direct current transmission and engineering technology, applied in the direction of reducing/preventing power oscillation, power transmission AC network, etc., can solve the threat of safe and stable operation of the power grid, AC tie line power oscillation and other issues

Pending Publication Date: 2020-04-10
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of oscillation is very likely to cause power oscillation of the AC tie line, which poses a huge threat to the safe and stable operation of the power grid.

Method used

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  • Method for suppressing large-amplitude power oscillation of direct-current power transmission project
  • Method for suppressing large-amplitude power oscillation of direct-current power transmission project
  • Method for suppressing large-amplitude power oscillation of direct-current power transmission project

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Embodiment Construction

[0038] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0039] figure 1 A schematic flow chart of a method for suppressing large-scale power oscillations in DC transmission projects provided by the embodiment of the present application, combined below figure 1 The method provided in the embodiment of the present application will be described in detail.

[0040] Step S101, judging whether the AC voltage of the inverter-side commutation bus continues to be low.

[0041] When a fault occurs on the AC side of the DC transmission project, the recovery process of the AC volta...

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Abstract

The invention discloses a method for suppressing large-amplitude power oscillation of a direct-current power transmission project. The method comprises the following steps: judging whether the alternating-current voltage of an inverter-side converter bus is continuously low or not; if the condition that the voltage is continuously low is met, modifying the control parameters of a low-voltage current limiting link to reduce the recovery speed of the current in the low-voltage current limiting link; judging whether the alternating-current voltage of the inverter-side converter bus is stably recovered or not; and if the condition of stable voltage recovery is satisfied, recovering the original control parameter data of the low-voltage current-limiting link to recover the recovery speed of theoriginal current in the low-voltage current-limiting link, suppress the large-amplitude power oscillation of a direct-current power transmission project under the serious fault of an alternating-current side, and prevent the huge threat to the safe and stable operation of the power grid.

Description

technical field [0001] The application relates to the field of UHV DC transmission control and protection, in particular to a method for suppressing large-scale power oscillations in DC transmission projects, and at the same time relates to a device for suppressing large-scale power oscillations in DC transmission projects. Background technique [0002] With the rapid development of DC transmission, large-scale DC cross-regional transmission, and the integration of AC and DC hybrids in the whole network have become typical features of power grids. The stability characteristics of large power grids are undergoing profound changes, mainly manifested in: on the basis of the operating characteristics of traditional AC systems, new characteristics such as mutual coupling between AC and DC, multi-circuit DC, and mutual influence between DC sending and receiving terminals are gradually emerging. And with the increase of DC transmission scale, it has become increasingly complex and ...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/36
CPCH02J3/24H02J3/36Y02E60/60
Inventor 朱艺颖李跃婷雷霄刘翀王薇薇许涛于钊贺静波金一丁刘浩芳张晓丽刘琳吴娅妮刘世成孙栩王晶芳林少伯庞广恒周亦夫王亮谢国平李新年
Owner CHINA ELECTRIC POWER RES INST
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