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

Small disturbance stability margin probability assessment method considering wind-speed random fluctuation

A technology with small disturbance, stable and random fluctuation. It is used in wind power generation, parallel feeding arrangement of a single network, etc. It can solve the problems of few factors to be considered in the establishment of wind speed model and unable to display operating conditions, and achieve the effect of reducing the calculation dimension.

Active Publication Date: 2019-11-08
NANJING UNIV OF SCI & TECH +1
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a small disturbance stability margin probability assessment method to solve the problem that the wind speed model in the existing assessment method has few considerations and cannot show the real operating conditions

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
  • Small disturbance stability margin probability assessment method considering wind-speed random fluctuation
  • Small disturbance stability margin probability assessment method considering wind-speed random fluctuation
  • Small disturbance stability margin probability assessment method considering wind-speed random fluctuation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0084] This embodiment takes the feed-in system of 3 wind farms as an example to verify the feasibility and effectiveness of the model and method of the present invention on the small disturbance stability margin probability assessment problem of random fluctuations in wind speed. Table 1 and Table 2 are grid-connected parameters and line parameters of the converter respectively.

[0085] Table 1 Parameters of converter grid-connected system

[0086]

[0087] Table 2 Three feed system network parameters

[0088]

[0089] Method of the present invention comprises the following contents:

[0090] 1. Using the generalized short-circuit ratio method to establish a grid-connected model of multiple direct-drive wind turbines and simplify the model, and then calculate the critical short-circuit ratio according to the model to obtain the critical short-circuit ratio α GCSCR . When the generalized short-circuit ratio increases, the change curve of the characteristic root of th...

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 small disturbance stability margin probability assessment method considering wind-speed random fluctuation. The method considers the problem of uncertainty of small disturbance stability margin caused by randomness and uncertainty of wind power generation power, and is characterized by modeling and simplifying the system through a generalized short circuit ratio method, simulating fan output through a multiple-wind-farm random output model considering wind speed correlation between wind farms, providing a fan grid-connected oscillation stability margin probability assessment model, and then, solving oscillation stability margin and risk evaluation indexes through a Monte Carlo method. Simulation results show that the small disturbance stability margin probabilityassessment method considering wind-speed random fluctuation can effectively calculate the probability of system instability under different wind speed correlation and different stability margins, andhas a certain guiding significance for multiple-wind-farm grid-connected small disturbance stability margin probability assessment.

Description

technical field [0001] The invention belongs to the field of power system stability and control, in particular to a small disturbance stability margin probability evaluation method considering random fluctuations in wind speed. Background technique [0002] In recent years, wind power, as the renewable energy with the most development potential, has developed rapidly and has received considerable attention in the energy strategies of various countries. The integration of large-scale wind power into the grid leads to the coupling of a large number of asynchronous power sources with random fluctuations to the power system originally composed of controllable and dispatchable synchronous power sources, making the modern power system transform into a stochastic-deterministic coupled power system. The stability problem of this coupled power system brings new challenges to the stability analysis theory and method of conventional power system. Therefore, how to properly consider th...

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): H02J3/38
CPCY02E10/76
Inventor 张飞云卜京郑铭洲夏凡吴双孙莹蒋建斌夏星星卞婉春殷明慧谢云云邹云刘建坤周前汪成根张宁宇
Owner NANJING UNIV OF SCI & TECH
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