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Control method and system for DC line restart function

A DC line and control method technology, applied in the field of power transmission, can solve the problems of increasing the risk of system instability, prolonging the time of machine cut-off action of the stability control system, and achieving the effect of improving reliability and stability

Inactive Publication Date: 2016-09-28
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

[0004] In the existing DC system, the control of the restart function of the two poles of the DC line is independent of each other and has no connection with each other. If the first pole of the DC line is blocked and the restart of the second pole fails to restart, the stability control system will be prolonged. Maneuvering time increases the risk of system instability

Method used

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  • Control method and system for DC line restart function
  • Control method and system for DC line restart function
  • Control method and system for DC line restart function

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Embodiment Construction

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0015] The embodiment of the present invention provides a method for controlling the restart function of a DC line, which combines figure 1 As shown, including the following steps:

[0016] 101. Determine the operation mode of the DC project.

[0017] In the embodiment of the present invention, a case where the operation mode includes a networking mode and an island mode is taken as an example to describe the control method of the restart fu...

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Abstract

Embodiments of the present invention provide a control method and system for a restart function of a DC line, which relate to the technical field of power transmission and can improve the reliability and stability of DC project operation. The specific plan is: determine the operation mode of the DC project; when a DC fault occurs in both poles, determine the fault type; determine the coordination strategy when the two poles of the DC line are restarted according to the operation mode and the fault type; according to the coordination The policy controls the restart function for both poles of the DC link. The invention is used for the control of the DC line restart function.

Description

Technical field [0001] The present invention relates to the field of power transmission technology, in particular to a control method and system for the restart function of a DC line. Background technique [0002] The DC link restart function is an important part of the DC transmission project control system. When an instantaneous ground fault occurs on the DC line, the DC current rises and the voltage drops. After the station control system executes the DC control protection action, if it does not receive the emergency shutdown signal from the pole control system, it will issue a DC line restart instruction to restart the DC line. [0003] If the DC line restarts successfully, the DC voltage is established, the current is restored, and the DC line resumes normal operation. The success of the line restart of the DC system directly affects the safe and stable operation of the power grid. [0004] In the existing DC system, the control of the restart function of the two poles of the...

Claims

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Application Information

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IPC IPC(8): H02J1/00
CPCH02J1/00
Inventor 朱益华李书勇崔柳
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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