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

A fault tracing method based on su-mrmr and pso-svm for high-voltage off-grid faults in wind farms

A PSO-SVM and wind farm technology, applied in the electric power field, can solve problems such as the fault traceability method for high-voltage off-grid faults in unseen wind farms, and achieve the effect of improving the accuracy of fault traceability

Active Publication Date: 2022-07-15
SOUTHEAST UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing research content of wind farm off-grid faults is to build a wind farm off-grid assessment, early warning and anti-off-grid measure system, and there is no research on the source tracing method of high-voltage off-grid faults in wind farms

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
  • A fault tracing method based on su-mrmr and pso-svm for high-voltage off-grid faults in wind farms
  • A fault tracing method based on su-mrmr and pso-svm for high-voltage off-grid faults in wind farms
  • A fault tracing method based on su-mrmr and pso-svm for high-voltage off-grid faults in wind farms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] like figure 1 , the method includes the following steps: Step 1. Constructing high-voltage off-grid fault scenarios of different wind farms through simulation.

[0088] Among them, the fault scenario construction includes: setting simulation parameters, which include fault type, fault location, fault start and end time, and the capacity of reactive power compensation equipment at the grid connection point of the wind farm; The types include three-phase short circuit, DC commutation failure, DC blocking, etc. The fault locations are distributed on each node close to the wind farm, the interval between the start and end of the fault is 0.2s to 0.4s, and the capacity of the reactive power compensation equipment at the grid-connected store of the wind farm It is set according to the rated output power of each fan, generally 50% of the rated output power. Then read the electrical and mechanical quantities of the wind farm after the transient stability simulation.

[0089] ...

Embodiment 2

[0152] like Figure 4 , This embodiment uses a local area of ​​the Northwest Power Grid in China as the test system. The test system includes 1 DC transmission line, 15 wind farms, 10 thermal power plants and 36 busbar nodes to trace the source of the high-voltage off-grid composite fault of the wind farm. , and summarizes the results of compound fault traceability.

[0153] The samples used in the test examples are generated by the PSASP transient stability simulation platform, and the parameters involved in the samples are all expressed in per unit values. First, run the steady-state operating conditions of the Northwest Power Grid in the simulation model, including the output of each generator in the power grid, the load level of each node, etc.; secondly, set the location, type and start and end time of the fault, which are subject to random distribution. The fault location is the wind farm busbar and its surroundings in the Northwest Power Grid. The fault types include: ...

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 present invention discloses a method for tracing the source of high-voltage off-grid faults in wind farms based on SU-MRMR and PSO-SVM. The method includes the following steps: (1) setting different types of transient faults through simulation; (2) according to data samples Construct an index system for high-voltage off-grid wind farms; (3) Screen out characteristic indicators based on SU‑MRMR (symmetrical uncertainty and MRMR) method; (4) Perform high-voltage analysis based on PSO‑SVM (Particle Swarm Optimization and Support Vector Machine) method Off-grid fault traceability. The index system constructed by the invention combines the electrical and mechanical quantities of the wind farm when the high voltage is off-grid, and can reflect the high-voltage off-grid characteristics of the wind farm; the fault tracing method for the high-voltage off-grid of the wind farm provided by the present invention can be quickly and accurately It has good stability and can adapt to different types of fault scenarios in the actual power grid.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for tracing the source of a high-voltage off-grid fault in a wind farm based on SU-MRMR and PSO-SVM. Background technique [0002] my country's wind farms usually adopt a large-scale centralized development model. Large-scale wind power bases are generally far away from the load center, and usually need to be connected to the high voltage level of the power system or DC transmission lines for long-distance power transmission. The advantage of centralized wind power grid connection lies in the large-scale development and utilization of wind power, but there are also problems such as weak voltage support capability and prominent reactive voltage problems. Especially in the typical power grid where the cluster wind turbines are connected to the weak power grid and sent out over a long distance, under the condition of heavy load on the power grid, equipment failure a...

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): H02J3/38
Inventor 王玉荣朱奕飞王琦汤奕
Owner SOUTHEAST 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