Large-scale time-lag electric system characteristic value calculation method based on EIGD

A technology of power system and calculation method, applied in the direction of calculation, electrical digital data processing, special data processing applications, etc., can solve problems such as no clear, difficult eigenvalues, and inability to use time-delay eigenvalue calculations

Active Publication Date: 2015-05-13
SHANDONG UNIV
View PDF3 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The spectral discretization method has the following shortcomings: (1) the approximate matrix of the infinitesimal generator has no clear and analytical expression, and it is difficult to use the sparse eigenvalue method to calculate part of the e...

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
  • Large-scale time-lag electric system characteristic value calculation method based on EIGD
  • Large-scale time-lag electric system characteristic value calculation method based on EIGD
  • Large-scale time-lag electric system characteristic value calculation method based on EIGD

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0099] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0100] 1. Time-delay power system model

[0101] After considering the influence of wide-area communication time delay, the power system can be described by a set of time-delay differential equations as follows:

[0102]

[0103] Where: x∈R n×1 is the state variable vector of the power system, and n is the total number of system state variables. t is the current moment, τ i >0 is the time-delay constant of the i-th time-delay link, i=1,2,...,m. where the largest time lag is denoted as τ max . is the system state matrix, which is a dense matrix; is the time-delay state matrix of the system, which is a sparse matrix. They can be specifically expressed as:

[0104] A ~ 0 = A 0 - B 0 ...

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

Te invention discloses a large-scale time-lag electric system characteristic value calculation method based on EIGD. The method includes the steps of establishing a time-lag electric system model, converting the formula of the time-lag electric system model into the abstract cauchy problem, converting the characteristic value of the time-lag electric system model into the characteristic value of an infinitesimal generator of the calculated and converted formula, conducting discretization on the infinitesimal generator to obtain an approximate matrix of the infinitesimal generator, obtaining the approximate matrix where displacement processing is conducted by conducting displacement processing on the approximate matrix, obtaining an inverse matrix after inverse conversion is conducted on the approximate matrix where displacement processing is conducted, converting the partial characteristic value required to be calculated into the partial characteristic value with the maximum module value, calculating the partial characteristic value, with the maximum module value, of the inverse matrix through the Arnoldi algorithm, and obtaining the characteristic value lambda of the approximate matrix. Verification is conducted through the Newton iteration method, and the accurate characteristic value and the accurate characteristic vector of a time-lag electric system are obtained through calculation.

Description

technical field [0001] The present invention relates to an EIGD-based large-scale time-delay power system eigenvalue calculation method. The Chinese interpretation of EIGD: display infinitesimal generator discretization. The full English name of EIGD: Explicit Infinitesimal Generator Discretization. Background technique [0002] The emergence of Wide-Area Measurement System (WAMS) has brought new opportunities for the development of stability analysis and control of large-scale interconnected power systems. The low-frequency oscillation control of the interconnected grid based on the wide-area information provided by WAMS can obtain better damping control performance by introducing a wide-area feedback signal that effectively reflects the interval oscillation mode. Improving the power transmission capacity of the system provides a new control method, which has a good and wide application prospect. [0003] When the wide-area signal is transmitted and processed in the WAMS c...

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): G06F19/00G06Q50/06
Inventor 叶华王燕燕刘玉田
Owner SHANDONG 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