Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Identification method of large disturbance in power grid based on wams

A technology of large power grid disturbance and identification method, applied in the field of power grid, can solve problems such as misjudgment, late start of power grid large disturbance identification research, accidents, etc.

Inactive Publication Date: 2018-04-24
NORTHEAST GASOLINEEUM UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the identification of large disturbances in the power grid started relatively late, and the quantity reflecting the state of the power grid used by the existing research methods cannot fully express the characteristics of the disturbance, making it more difficult to distinguish various disturbances, and it is easy to cause misjudgment, etc.
The current research on disturbance identification has not fully considered the needs of actual operation, nor has it made full use of the existing technical conditions. It may spread to adjacent areas and cause a large power grid accident

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
  • Identification method of large disturbance in power grid based on wams
  • Identification method of large disturbance in power grid based on wams
  • Identification method of large disturbance in power grid based on wams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] by figure 2 The disturbance calculation example of the 3-machine 9-node system shown is the first embodiment, and it is assumed that PMUs are configured at nodes 1 (balanced nodes), 7, and 9, so that the data measurement of all branches can be covered.

[0059] In order to adapt the algorithm to the model, the generator is set as a 3rd-order detailed model, and the load model is selected as a load model with 40% constant impedance and 60% constant power. In this embodiment, MATLAB software is used to select several disturbances of the 3-machine 9-node system Typical examples are used as input data for simulation.

[0060] The experimental data of various disturbances are input into the disturbance identification program to verify the accuracy of the large disturbance identification method.

[0061] First, according to the simulation data, the variation of positive sequence voltage and the values ​​of zero sequence voltage and negative sequence voltage after disturbanc...

Embodiment 2

[0088] see image 3 1. The torch substation of an oilfield power grid supplies power for Fengyun and Xinghuo substations through double-circuit lines. Below Fengyun substation, there are North Five Substations, North Ten Substations, North Nineteen Substations, North III-2 Substations, North Twenty Substations, and North Seven Substations. , under Xinghuo, there are middle five shifts, north eleven shifts, north seventeen shifts, middle twelve shifts, middle nine shifts, middle one shifts, and middle seventeen shifts. In addition, there are reservoir shifts under north five shifts, and north ten shifts Below the North Three Transformations, under the North III-2 Transformation is the North II-2 Transformation, under the North Twenty Transformation is the Wangjiaweizi Transformation, under the North Seventeen Transformation is the Jubei Sixteen Transformation, under the Middle Nine Transformation is the Middle Ten Transformation, and the Central Transformation Substations below...

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

The invention discloses a WAMS-based power grid large disturbance identification method, comprising the following steps: step 1), data collection; step 2), feature extraction; step 3), data calculation; step 4), data processing; step 5), Disturbance identification. This method can identify large disturbances in the power grid, and then determine the type of large disturbances in the power grid. Using this method, short circuits can be accurately identified, and three types of short circuits (three-phase short circuit, two-phase ground short circuit and single-phase ground short circuit) can be identified. short circuit), and can also accurately identify the two disturbances of machine shedding and load shedding.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method for identifying large disturbances in power grids based on WAMS. Background technique [0002] The vigorous construction of the West-to-East Power Transmission and National Networking project has brought my country's power grid construction into a new stage of vigorous development. During the "Twelfth Five-Year Plan" period, the State Grid is preparing to invest 500 billion yuan in the initial construction of the smart grid. The power grid (smartpower grids) refers to the intelligentization of the power grid. It is built on the basis of a high-speed two-way communication network, and uses advanced equipment, measurement methods, sensing technology, control methods and decision-making systems to make the operation of the power grid Safer, more reliable, more economical and environmentally friendly, the smart grid also has the advantages of being able to resist supply, g...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G01R31/00G01R31/02
CPCG01R31/00G01R31/50H02J3/00H02J2203/20Y02E40/70Y02E60/00Y04S10/00Y04S10/22
Inventor 徐建军李宏玉高金兰闫丽梅许爱华徐研凯崔佳
Owner NORTHEAST GASOLINEEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com