Method and device for controlling preferential tripping of power grid at sea

A control method and control device technology, applied in emergency protection circuit devices, power network operating system integration, electrical components, etc., can solve problems that cannot meet the needs of power grid stability, save time for troubleshooting, and improve safety Effect

Active Publication Date: 2011-09-14
SHENZHEN WELLREACH AUTOMATION
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  • Summary
  • Abstract
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Problems solved by technology

Therefore, the existing single-platform limited tripping s

Method used

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  • Method and device for controlling preferential tripping of power grid at sea
  • Method and device for controlling preferential tripping of power grid at sea
  • Method and device for controlling preferential tripping of power grid at sea

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[0054] It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0055] Such as figure 1 As shown, the offshore power grid priority trip control method proposed by an embodiment of the present invention includes:

[0056] Step S1, acquiring and analyzing the real-time status signal of the offshore power grid system;

[0057] Step S2, determine possible pre-faults;

[0058] Step S3, determining the load to be unloaded when the pre-fault occurs;

[0059] Step S4, when the pre-fault occurs, unload the load to be unloaded.

[0060] In this embodiment, based on the real-time status of the offshore power grid system, it is estimated that the faults that may occur in the current state are defined as pre-faults, and the total number of pre-faults may be one or more.

[0061] When the total number of pre-faults is 1, for the pre-fault, when the current pre-fault occurs, in order to ensure system ...

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Abstract

The invention discloses a method and a device for controlling preferential tripping of power grid at sea. The method for controlling the preferential tripping of a power grid at sea comprises the following steps of: acquiring and analyzing the real-time state signals of a power grid system at sea; determining pre-fault which may occur possibly; determining a load which should be unloaded when thepre-fault occurs; and unloading the proper load when the pre-fault occurs. The method and device provided by the invention are intended for the power grid system at sea exclusively. By the method anddevice, the fault which may occur is estimated in advance according to the real-time state of the power grid system at sea, and then unloading schemes are determined according to the estimated fault.When the fault occurs, the system can be protected according to the unloading scheme, so the fault handling time is saved, and the safety, stability and reliability of the power grid system at sea are effectively improved.

Description

technical field [0001] The invention relates to a system stabilization technology, in particular to a method and device for prioritizing tripping control of an offshore power grid that can predict faults in advance and provide a tripping scheme in time. Background technique [0002] At present, with the continuous increase of offshore oil platforms and the increasing power load, the original single power station power supply mode can no longer meet the demand for power reliability, and offshore power grids have become a major trend. Designing an effective stability system is an essential part to ensure the safe and stable operation of the offshore power grid system. [0003] Compared with the power grid system on land, since the power grid on land is regarded as infinite power, its priority tripping system is designed according to each branch line; while the offshore power grid is a local small power grid, if a fault occurs, if it cannot be dealt with in a timely and effecti...

Claims

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Application Information

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IPC IPC(8): H02H7/00H02J3/38H02J3/14
CPCY02B70/3225Y04S20/222
Inventor 李凌云郝富强
Owner SHENZHEN WELLREACH AUTOMATION
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