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

Wirtinger inequality-based power system delay-dependent robust stability judgment method

A technology of power system and judgment method, which is applied in the field of power system, can solve the problems of reducing the conservatism of criteria, and achieve the effect of reducing conservatism

Active Publication Date: 2018-04-20
HOHAI UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the Lyapunov stability theory is a sufficient condition for judging the stability of the system, the criterion obtained by the above method has a certain degree of conservatism, so how to reduce the conservatism of the criterion has become one of the most difficult points in the research of this method

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
  • Wirtinger inequality-based power system delay-dependent robust stability judgment method
  • Wirtinger inequality-based power system delay-dependent robust stability judgment method
  • Wirtinger inequality-based power system delay-dependent robust stability judgment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The technical solution of the present invention will be further introduced below in conjunction with the accompanying drawings and specific implementation methods.

[0027] This specific embodiment discloses a time-delay-dependent robust stability determination method of a power system based on Wirtinger's inequality, including the following steps:

[0028] S1: Establish a multi-delay power system model considering uncertain parameters:

[0029] In general, a single-delay power system with time-delay links can be described by a set of differential algebraic equations, and then linearized near the operating point of the system, the system can finally be expressed as:

[0030]

[0031] In formula (1): x(t)∈R n is the system state variable; Φ(t) is the initial state of the system; A 0 ,A 1 ∈ R n×n is the coefficient matrix of the system; h∈R is the delay constant of the system.

[0032] If there are uncertain parameters in the system, the system (1) will be transfo...

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 Wirtinger inequality-based power system delay-dependent robust stability judgment method. According to the method, uncertain parameters existing in the modeling process of apower system are considered. The method is used for analyzing maximum delay stability margin that the power system can withstand. The method specifically includes the following steps that: S1, a multi-delay power system model considering uncertain parameters is established; and S2, whether given delay hi satisfies a stability judgment condition is judged, if the given delay hi satisfies the stability judgment condition, it is judged that the delay power system is asymptotically stable under the delay hi condition. The method of the invention is wide in application range and less conservative.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a time-delay dependent robust stability determination method for power systems based on Wirtinger's inequality. Background technique [0002] With the continuous expansion of power grid scale and the rapid development of phasor measurement unit (PMU) technology, modern power systems tend to be large-scale and multi-interconnected. Therefore, the grid stability control strategy will gradually tend to global control from local control. In the global control strategy, especially due to the introduction of remote signals, the signal delay problem will inevitably occur, and previous studies have shown that the time delay will lead to the failure of system control equipment, causing system performance deterioration and instability. Therefore, understanding the time-delay stability domain that the power system can withstand is of great significance for the safe and stable operation of the ...

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): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 李宁孙永辉卫志农孙国强郭敏张世达翟苏巍王义武小鹏
Owner HOHAI 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