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

Method and system for identifying negative weak damping unit of power system

A technology of power system and identification method, which is applied in the field of identification method and system of negative and weakly damped units in power system, and can solve problems such as ultra-low frequency oscillation

Pending Publication Date: 2022-04-08
国家电网有限公司西南分部
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the power grid is dominated by hydropower, the negative damping effect will dominate, and it is easier to cause ultra-low frequency oscillations. Therefore, there is an urgent need for a method for identifying negative and weakly damped units in the power system under the condition of high proportion of hydropower.

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 and system for identifying negative weak damping unit of power system
  • Method and system for identifying negative weak damping unit of power system
  • Method and system for identifying negative weak damping unit of power system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] Specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0056] The invention provides a method and system for identifying negative and weakly damped units in a power system;

[0057] Such as figure 1 As shown, on the one hand, a method for identifying negative and weakly damped units in a power system includes the following steps:

[0058] S1. Collect abnormal data of units in the power system and perform preprocessing to obtain oscillation signals of each generator;

[0059] Preferab...

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 negative weak damping unit identification method and system for a power system, and the method comprises the steps: collecting abnormal data of a unit in the power system, carrying out the preprocessing, obtaining an oscillation signal of each generator, carrying out the mode decomposition, obtaining a discrete time sequence parameter of each oscillation signal, and carrying out the recognition of the unit; according to the method, a damping torque analysis method is utilized to obtain a damping torque coefficient of each generator in each oscillation mode according to discrete time sequence parameters of each oscillation signal, and the negative and weak damping unit of the power system is identified in combination with the damping torque coefficients. Under the condition of low-frequency oscillation or ultralow-frequency oscillation, a unit causing oscillation is found by identifying negative damping or weak damping in a power system, so that an ultralow-frequency oscillation strategy is effectively formulated.

Description

technical field [0001] The invention relates to the field of identification of negative and weak damping units in a power system with a high proportion of hydropower, in particular to a method and system for identifying negative and weak damping units in a power system. Background technique [0002] At present, the high proportion of hydropower has become the main feature of Southwest Power Grid. In recent years, the phenomenon of ultra-low frequency oscillation caused by hydropower in Southwest Power Grid has become more and more frequent, which greatly increases the risk of system disconnection. In order to ensure the safe and stable operation of the power grid, it is necessary to quickly suppress the ultra-low frequency oscillation after it appears, and the accurate identification of the negative damping unit is the prerequisite for formulating an effective suppression strategy for the ultra-low frequency oscillation. [0003] The analysis of previous oscillation acciden...

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): H02J3/24H02J3/38
Inventor 余锐何飞汤凡张宇栋蒋航刘佳钰刘柏私
Owner 国家电网有限公司西南分部
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