Online static security analysis method with N-2 opening rapid scanning function

A static safety analysis and fast scanning technology, applied in the field of analysis, can solve the problems of increased calculation amount and large number of fault combinations, and achieves the effect of reducing the amount of calculation, satisfying the accuracy of calculation results, and improving the speed of analysis and calculation.
CN104092210AActive Publication Date: 2014-10-08STATE GRID CORP OF CHINA +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2014-10-08

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Abstract

The invention provides an online static security analysis method with the N-2 opening rapid scanning function. The method includes the following steps that a current power grid impedance matrix is formed; a branch opening distribution factor matrix is determined; based on branch opening distribution factors, active load flows of branches obtained after N-2 opening faults are calculated and a suspicious and serious N-2 opening fault set is screened; alternating current load flow analysis is conducted on the suspicious and serious N-2 opening faults and final serious N-2 opening faults are determined; the serious N-2 opening fault set is output and a warning message is given. According to the method, an N-2 opening fault combined universal set is introduced to an anticipated fault set, the power load flow distribution condition is rapidly scanned after the N-2 opening faults through the branch opening distribution factors and the parallel computing technique; alternating current load flow analysis is conducted on suspicious N-2 opening combinations; the whole calculation process is efficient and rapid and the requirement for online application is met.
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Description

technical field

[0001] The invention relates to an analysis method, in particular to an online static safety analysis method with N-2 disconnection fast scanning function. Background technique

[0002] The purpose of power system safety analysis is to use the method of predictive accident analysis to predict whether there are potential safety hazards in the system, so that corresponding measures can be taken early to prevent major accidents in the system. Several blackouts occurred in the United States in the mid-1860s, which promoted the progress of power system security analysis. Power system security analysis mainly includes static security analysis and dynamic security analysis. Static safety analysis judges whether the system will be overloaded or the voltage exceeds the limit after the anticipated accident occurs; dynamic safety analysis judges whether the system will lose stability after the anticipated accident occurs.

[0003] At present, the online static securit...

Claims

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