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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.

Active Publication Date: 2014-10-08
STATE GRID CORP OF CHINA +1
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  • Description
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  • Application Information

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Problems solved by technology

For N-2 breaking faults, due to the huge number of fault combinations, the overall calculation amount is significantly increased compared with N-1 breaking. At present, it is rarely considered in the actual online static safety analysis software. The bottleneck is mainly the calculation speed.

Method used

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

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Embodiment Construction

[0035] The present invention will be further exchanged and described below in conjunction with the accompanying drawings.

[0036] Such as figure 1 , the present invention provides a kind of on-line static safety analysis method with N-2 disconnection fast scanning function, described method comprises the following steps:

[0037] Step 1: Form the current grid impedance matrix;

[0038] Step 2: Determine the distribution factor matrix of branch disconnection;

[0039] Step 3: Calculate the active power flow of each branch after the N-2 breaking fault based on the branch breaking distribution factor, and screen out the suspicious serious N-2 breaking fault set;

[0040] Step 4: Conduct AC power flow analysis on suspicious serious N-2 breaking faults, and determine the final serious N-2 breaking faults;

[0041] Step 5: Output a serious N-2 disconnection fault set, and give an alarm message.

[0042] In the step 1, the current grid impedance matrix is ​​represented by X, X i...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 汤必强於益军姚建国杨胜春冯树海杨争林李峰王礼文石飞徐鹏
Owner STATE GRID CORP OF CHINA
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