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A decision tree-based dynamic safety assessment and prevention control comprehensive method

A preventive control and dynamic safety technology, applied in the field of power system safety analysis and evaluation, can solve problems such as low accuracy and time-consuming, and achieve the effect of overcoming unstable results

Active Publication Date: 2019-05-17
湖北集防科技有限公司
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Through the use of data mining algorithms, the design and integration into a parallel plan of prevention and control based on decision trees overcomes the problems of time-consuming and low accuracy of traditional single decision trees

Method used

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  • A decision tree-based dynamic safety assessment and prevention control comprehensive method
  • A decision tree-based dynamic safety assessment and prevention control comprehensive method
  • A decision tree-based dynamic safety assessment and prevention control comprehensive method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] The method proposed by the invention is tested on a test model in a 400-node example system, and the system includes 200 transmission lines, 8 CPP units and 150 CHP units.

[0074] The system adopts the dynamic safety evaluation system and the corresponding preventive control method based on this invention, and carries out safety evaluation and preventive control on the faults in the system. The result successfully verifies the effectiveness of the power system safety preventive control. The result As shown in Table 1 and Table 2, Table 1 verifies the performance of DTs, and Table 2 simulates the effect of the method after an accident. It can be seen that compared with the traditional decision tree dynamic security assessment method, this method has a higher rate of returning to the safe state, and the effect of preventive control has increased significantly.

[0075] Table 1

[0076] data set

[0077] Table 2

[0078] faulty generator

[0079] Com...

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PUM

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Abstract

The invention provides an electric power system dynamic safety assessment system based on a decision tree (DT) and a preventive control method, and the method comprises the following steps of providing a safety boundary, and carrying out the separation and recognition of the safety boundary; deflecting the sample to a security boundary by using importance sampling; forming a database through timedomain simulation and DT training; and performing online dynamic safety assessment and executing prevention control. According to the invention, more uncertainties in the operation of the power transmission system are solved; the power system can operate more efficiently and safely, a traditional single decision tree assessment method is improved, two decision tree cooperation methods are adopted,the safe operation conditions and the prevention and control schemes of the safe operation conditions are accurately decided, and the method has important significance for improving the operation efficiency and quality of a power grid.

Description

technical field [0001] The invention belongs to the field of power system safety analysis and evaluation, and in particular relates to a dynamic safety evaluation method based on a decision tree. Background technique [0002] In recent years, there have been many voltage collapse accidents in the world, which makes the voltage stability of power system get more and more attention. The transient voltage instability or collapse caused by short-term large disturbance is particularly serious. If the regional transient voltage instability can be accurately judged during online monitoring and preventive and control measures are taken in time, it will help to contain the transient voltage instability accident. The large-scale cascading voltage instability or collapse caused by some nodes improves the overall stability of the region. [0003] The ever-increasing demand for modern power forces modern power systems to operate closer to safe operation. In addition, the increasing ado...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCY04S10/50
Inventor 刘颂凯史若原吉培荣毛丹佘小莉王丰杨楠钟浩
Owner 湖北集防科技有限公司
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