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

Method for positioning and suppressing ultralow-frequency oscillation disturbance source

A disturbance source location, ultra-low frequency technology, applied in the direction of reducing/preventing power oscillation, AC network flicker reduction, AC network circuit, etc., can solve the problem of inability to accurately locate ultra-low frequency oscillation disturbance source

Active Publication Date: 2019-07-02
SICHUAN UNIV
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When ultra-low frequency oscillation occurs, the speeds of all generators in the system will change synchronously, and the existing analysis methods cannot accurately locate the disturbance source of ultra-low frequency oscillation
At the same time, the study found that when the flexible straight line project in the Chongqing-Hubei area is put into operation, the Sichuan-Chongqing Power Grid will realize asynchronous networking with the Central China Power Grid, which is very similar to the situation in the Yunnan Power Grid, and there is also a risk of ultra-low frequency oscillation in the Sichuan-Chongqing Power Grid

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
  • Method for positioning and suppressing ultralow-frequency oscillation disturbance source
  • Method for positioning and suppressing ultralow-frequency oscillation disturbance source
  • Method for positioning and suppressing ultralow-frequency oscillation disturbance source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0092] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0093] like figure 1 As shown, the present invention also discloses a method for locating and suppressing an ultra-low frequency oscillation disturbance source. The method includes the following steps:

[0094] SS1: locate the ultra-low frequency oscillation disturbance source unit;

[0095] SS2: Identify the system low-order linearization model of the disturbance source unit;

[0096] SS3: Install an additional damping controller for the disturbance source unit, and use intelligent algorithms to optimize the parameters of the additional damping controller;

[0097] SS4: Disturbance suppression with additional damping controller.

[0098] As a preferred design of the present invention, the ultra-low-frequency oscillation distu...

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 method for positioning and suppressing an ultralow-frequency oscillation disturbance source. The method comprises the following steps of SS1, positioning an ultralow-frequency oscillation disturbance source unit; SS2, identifying the system low-order linear model of the disturbance source unit; SS3, providing the disturbance source unit with an additional damping controller, and optimizing the parameters of the additional damping controller by using an intelligent algorithm; and SS4: performing disturbance suppression by using the additional damping controller. The method for positioning the ultralow-frequency oscillation disturbance source is characterized by constructing a corresponding Hamilton expression according to a rotor motion equation, obtaining the energy change rate of each generator input into a power grid, and determining the ultralow-frequency oscillation disturbance source according to the energy variation amount input into the power grid. Themethod suppresses system ultralow-frequency oscillation, and improves the stability of small interference.

Description

technical field [0001] The invention relates to the field of power system control, in particular to a method for locating and suppressing an ultra-low frequency oscillation disturbance source. Background technique [0002] The traditional low-frequency oscillation refers to the oscillation frequency between 0.1 and 2.5Hz. The relative oscillation between the rotors of the generator caused by the insufficient damping of the system can be studied by the analysis method of small disturbance stability. However, in recent years, ultra-low frequency oscillations with an oscillation frequency lower than 0.1 Hz have successively appeared in the DC transmission system with a relatively high proportion of hydropower units. In March 2016, when China Southern Power Grid was conducting an asynchronous networking test in Yunnan, a frequency oscillation with a duration of 25 minutes and a period of 20s occurred. When ultra-low frequency oscillation occurs, the speeds of all generators in ...

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): H02J3/38H02J3/24
CPCH02J3/382H02J3/24H02J3/002H02J2203/20Y02E60/00
Inventor 王渝红陈阳曾琦王媛
Owner SICHUAN 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