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Power or voltage oscillation damping in a power transmission system

A technology of voltage oscillation and power transmission, applied in the direction of reducing/preventing power oscillation, system integration technology, information technology support system, etc., can solve problems such as not being used to determine working conditions, and achieve the effect of avoiding duplication

Inactive Publication Date: 2012-05-23
ABB RES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today, there are no techniques for determining such post-disturbance operating conditions

Method used

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  • Power or voltage oscillation damping in a power transmission system
  • Power or voltage oscillation damping in a power transmission system
  • Power or voltage oscillation damping in a power transmission system

Examples

Experimental program
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Embodiment Construction

[0035] figure 1 A simplified power transmission system is schematically shown in which an apparatus for providing improved control of power or voltage oscillation damping according to a first embodiment of the invention is provided. The power transmission system is preferably an AC power transmission system operating at a network frequency such as 50 or 60 Hz.

[0036]The power transmission system comprises many geographical areas, here two areas A_I and A_II. These areas are represented by elliptical dotted lines, they are typically provided at a large distance from each other, as an example one of them may be provided in the south of Finland and the other in the south of Norway. The geographical area is here the relevant area. The coherent region is the region in which a group of machines such as synchronous generators operate coherently, ie they oscillate together. Such an area may also be called an electrical area, since machines are close to each other in an electrical...

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PUM

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Abstract

The invention provides a method, device and computer program product for providing improved control of power or voltage oscillation damping in a power transmission system. The device comprises a magnitude obtaining element (30) configured to obtain an instantaneous magnitude of a signal ( I DeltaP I ) representing a deviating oscillation in at least one element (12) of the power transmission system, a slope investigating element (58) configured to determine the rate of change of the signal, and a first processing block (34) comprising an integrating element (38) configured to integrate the instantaneous magnitudes with an integrating factor (Ki) that is based on the determined rate of change. The first processing block is further configured to form a phase compensation angle (Phic) based on the integrated instantaneous magnitude for use in a damping control signal generating unit in order to provide power or voltage oscillation damping of the system.

Description

technical field [0001] The invention relates to the field of power or voltage oscillation damping in power transmission systems. More specifically, the present invention relates to methods, devices and computer program products for providing improved control of power or voltage oscillation damping in power transmission systems. Background technique [0002] Interregional oscillation patterns are typically characterized by a group of machines in one geographic area of ​​the power transmission system swinging relative to a group of machines in another geographic area of ​​the power transmission system. Interregional oscillation modes are eg described in CN 101202451 , US 6252753 and EP 1852952 . [0003] These oscillations are initiated by, for example, normal changes in system load or switching events in the system possibly after a fault. These oscillations may typically have a frequency of less than a few Hz, eg in the range of 0.1-0.8 Hz, and are often considered acceptab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCY02E60/728Y04S10/265H02J3/24Y02E60/00Y04S10/00Y04S10/22Y02E40/70H02J3/242
Inventor B·伯格伦R·马朱姆德S·雷B·乔德休里N·雷乔德休里
Owner ABB RES LTD
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