Electric power system voltage stability evaluation misclassification constraint method based on umbrella-type algorithm

A voltage stabilization, power system technology, applied in computing, computer components, character and pattern recognition, etc., can solve problems such as difficulty in guaranteeing validity, inability to guarantee the generalization ability of VSA models, and performance impact, etc., to achieve optimization. The effect of classification performance

Active Publication Date: 2020-09-11
CHINA THREE GORGES UNIV
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] ①The relationship between the overall classification accuracy and the class I classification error rate cannot be well balanced, and the class I classification errors are constrained according to the severity of different VSA misclassifications, so as to reduce the risk of class I classification errors on system operation; ②Only rely on the decision tree Constructed VSA model, when the object attributes in the dataset have missi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric power system voltage stability evaluation misclassification constraint method based on umbrella-type algorithm
  • Electric power system voltage stability evaluation misclassification constraint method based on umbrella-type algorithm
  • Electric power system voltage stability evaluation misclassification constraint method based on umbrella-type algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0149] The present invention has been tested in a 23-node system and an actual 7917-node system, wherein the 23-node system such as image 3 Shown contains 23 nodes, 10 transformers and 6 generators. The 7917 node system contains 7917 nodes, 1325 generators and 5590 loads. In order to capture more system behaviors to enrich the database, a series of simulations were automatically performed using a Python program in the software PSS / E considering different operating conditions. The generator / load power distribution varied randomly between 80% and 120% and was based on a series of continuous power flow simulations with 3896 samples obtained for the 23-node system and 9876 samples obtained for the 7917 system. Tests were performed on a computer with an Intel Core i7 processor and 8GB of RAM.

[0150] Figure 4 , Table 1 shows the ROC bands and AUC values ​​corresponding to the 6 NP classifiers tested by the 23-node system (AUC.U and AUC.L represent the area of ​​the upper ROC ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An electric power system voltage stability evaluation misclassification constraint method based on an umbrella-type algorithm comprises: a step 1, constructing an initial data set, and constructing avoltage stability safety classification label based on an electric power system voltage stability evaluation rule; a step 2, selecting a key operation variable to construct an efficient sample set; astep 3, performing offline training on the voltage stability evaluation model; a step 4, sending a new sample set generated under a new operation working condition into the voltage stability evaluation model to update the model; and a step 5, completing online voltage stability evaluation by using the trained voltage stability evaluation model. The invention aims to solve the limitations of a traditional VSA model constructed based on a data driving tool in the aspects of misclassification constraints and a model updating mechanism. An electric power system voltage stability evaluation misclassification constraint method based on an umbrella-type algorithm is provided, so that the VSA model can provide a VSA result which balances the overall classification precision and the class of classification error constraints.

Description

[0001] The invention belongs to the field of power system voltage stability evaluation, and in particular relates to a misclassification constraint method for power system voltage stability evaluation based on an umbrella algorithm. Background technique [0002] The power system is one of the most complex industrial systems in the world, and its safe operation has always been a concern in system development. In recent years, the wide-area interconnection of modern power systems, the investment of renewable energy, the application of new equipment, the rapid growth of load, and the limitations of transmission capacity have become more and more obvious. The operating burden of the power system is getting heavier and heavier, and the operating state is getting closer and closer to the limit. Static voltage stability is an issue of great concern, and many blackouts are related to it, which may cause huge economic losses and adverse social impacts. Therefore, a reliable voltage st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06Q10/06G06Q50/06G06K9/62
CPCG06Q10/06393G06Q50/06G06F18/24Y04S10/50
Inventor 刘颂凯毛丹刘明怡刘炼薛田良张磊叶婧钟浩李世春杨苗陈云龙汪平陈星
Owner CHINA THREE GORGES UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap