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

Unscented transformation method for analyzing voltage stability probability of system containing wind power

A voltage stabilization, traceless transformation technology, applied in power network operating system integration, wind power generation, system integration technology, etc., to achieve high calculation accuracy, easy to understand and use, and easy to achieve.

Pending Publication Date: 2019-09-10
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing methods for probability analysis of voltage stability are difficult to meet the above four conditions at the same time, and existing methods need to use technologies such as orthogonal transformation and Nataf transformation to deal with related random variables

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
  • Unscented transformation method for analyzing voltage stability probability of system containing wind power
  • Unscented transformation method for analyzing voltage stability probability of system containing wind power
  • Unscented transformation method for analyzing voltage stability probability of system containing wind power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0036] Such as figure 1 As shown, an unscented transformation method for analyzing the probability of voltage stability of a wind power system includes the following steps: S1: Select the load margin index as the index for evaluating the static voltage stability of the power system, and use it as the objective function, considering the load margin index The extended power flow equation of the margin parameters and the static security constraints of the system establish a nonlinear programming model for the static voltage stability critical point; the established nonlinear programming model for the static voltage stability critical point is:

[0037]

[0038] In the formula: S B is the set of nodes; S Gis the set of generator nodes; S R is the set of reactive power sources; P Gi is the active...

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 belongs to the technical field of voltage stability of power systems, and specifically relates to an unscented transformation method for analyzing the voltage stability probability of asystem containing wind power. First, a static voltage stability probability evaluation model is established by considering the randomness of wind farm output and the uncertainty of load increasing direction; then, the voltage stability probability evaluation problem is converted into deterministic static voltage stability analysis of a small number of sample points by using a UT method; and finally, the deterministic problem is solved by the modern interior point method to obtain the mean value and covariance matrix of an output random variable. The original probability analysis problem is converted into a deterministic optimization problem, and the influence of the wind speed correlation between wind farms close to each other on the probability distribution of critical power is analyzed.The method is easy to implement and efficient in calculation, and can be used in online calculation of power systems. The voltage stability probability obtained is more accurate in analysis and has high calculation accuracy, and is convenient for power system dispatchers and operators to understand and use.

Description

technical field [0001] The invention belongs to the technical field of power system voltage stability, and in particular relates to a traceless transformation method for analyzing the probability of voltage stability of a wind power system. Background technique [0002] Load margin and critical power are effective indicators for analyzing the probabilistic stability of system voltage. At present, Monte Carlo simulation (Monte Carlo, MC) is an effective method for probabilistic analysis of voltage stability. It has strong adaptability, but the disadvantages of slow convergence and many simulation times limit its practical application. Bu S Q, Du W, Wang HF.Probabilistic Analysis of Small-Signal Rotor Angle / Voltage Stability of Large-Scale AC / DC Power Systems as Affected by Grid-Connected Offshore WindGeneration[J]. The voltage stability probability assessment method based on surface method, and the orthogonal transformation technology is used to deal with the correlation of ...

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 Applications(China)
IPC IPC(8): H02J3/00H02J3/46H02J3/14G06Q50/06
CPCH02J3/00H02J3/46H02J3/14G06Q50/06H02J2203/20Y02E10/76Y04S10/50Y04S20/222Y02E40/70Y02B70/3225
Inventor 郭小璇韩帅孙乐平吴宛潞秦丽娟杨艺云肖静吴宁冯玉斌
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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