Power system transient stability multi-fault constraint preventing control method

A technology for transient stability, power systems, applied in directions such as single-grid parallel feeding arrangements

Active Publication Date: 2013-12-25
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a multi-fault constraint preventive control method for transient stability of a power system, which decouples unstable faults through topology analysis of expected fault locations; formulates multi-fault adjustment sequence according to the severity of faults , reduce the dimensionality of the preventive control problem with multiple fault constraints into a stable control decision problem for multiple single faults, and finally obtain a preventive control adjustment strategy that satisfies all transient stability constraints

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  • Power system transient stability multi-fault constraint preventing control method
  • Power system transient stability multi-fault constraint preventing control method
  • Power system transient stability multi-fault constraint preventing control method

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[0104] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0105] like figure 1 , the present invention provides a power system transient stability multi-fault constraint preventive control method, the method includes the following steps:

[0106] Step 1: Determine whether there is a transient power angle instability fault in the power system, if not, end the transient power angle stability prediction fault calculation; if it exists, continue to the next step;

[0107] Step 2: Carry out topology analysis of the location where the transient power angle instability fault occurs, and determine the topological attributes of each transient power angle instability fault;

[0108] Step 3: Determine the adjustment sequence of transient power angle instability faults and the prevention and control strategy for transient power angle instability faults;

[0109] Step 4: Summarize the multi-fault control strategy;

[0110] St...

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Abstract

The invention provides a power system transient stability multi-fault constraint preventing control method. According to the method, a buckling failure is decoupled through expected fault position topology analysis; a multi-fault adjusting timing sequence is set according to fault severity, and a multi-fault constraint preventing control problem is reduced in a dimensional aspect into a multiple single fault stability control decision problem; finally, a preventing control adjusting strategy capable of meeting requirements of all transient stability constraints is obtained. According to the method, in the adjusting process, the economic type of prevention control is considered, a corresponding adjusting gear is distributed for the power adjusting space of each fault, and a strategy, smallest in adjustment, meeting the requirements of operation modes of multiple fault constraints is confirmed through a parallel calculating mode.

Description

technical field [0001] The invention belongs to the technical field of power system safety and stability analysis, and in particular relates to a power system transient stability multi-fault constraint prevention control method. Background technique [0002] The security and stability control of the large power grid is an important guarantee for the safe and stable operation of the power grid. With the rapid development of my country's regional power grid interconnection and the steady advancement of UHV power grid construction, the technical level and complexity of power grid operation are getting higher and higher, and the difficulty of power grid operation control is becoming more and more difficult. Among the power system stability accidents that have occurred, most of them are transient stability failure accidents. Compared with emergency control, preventive control can form an executable control plan before the failure occurs, and the control cost is small. Therefore...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46
Inventor 于之虹施浩波安宁丁平鲁广明吕颖江兴凌蔡顺有康建东胡建勇高波陈继林
Owner STATE GRID CORP OF CHINA
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