Power electronic multi-infeed power system key line identification method and system

A technology of power electronics and power systems, applied in the field of new energy planning and design

Active Publication Date: 2021-04-13
STATE GRID SHAANXI ELECTRIC POWER RES INST +2
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that after the new energy units with increasing capacity are connected, the power system presents a significant power electronic characteristic, which is prone to small disturbance stability problems and poses a great challenge to the safe and stable operation of the system

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
  • Power electronic multi-infeed power system key line identification method and system
  • Power electronic multi-infeed power system key line identification method and system
  • Power electronic multi-infeed power system key line identification method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] In order to make the purpose, technical effects and technical solutions of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments It is a part of the embodiment of the present invention. Based on the disclosed embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall all fall within the protection scope of the present invention.

[0056] see image 3 , a method for identifying key lines in a power electronic multi-infeed power system according to an embodiment of the present invention, comprising the following steps:

[0057] 1) The equivalent admittance matrix B is obtained from the impedance parameters and topology of the AC grid initial , the reduce...

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 power electronic multi-infeed power system key line identification method and system. The method comprises the steps that an extended admittance matrix of a power electronic multi-infeed power system is acquired, wherein the information based on which the extended admittance matrix is obtained comprises the feed-in capacity and the grid structure of the power electronic multi-feed-in power system; according to the characteristic value of the extended admittance matrix, the power electronic multi-infeed power system is equivalent to a plurality of power electronic single-infeed power systems with the same small interference stability, wherein the minimum characteristic value of the extended admittance matrix is the generalized short-circuit ratio of the power electronic multi-infeed power system; the characteristic value and the characteristic vector property are combined to obtain the sensitivity of the generalized short-circuit ratio relative to the admittance of each network line; and the key line of the power electronic multi-infeed power system is identified according to the obtained sensitivity sequence. The method can effectively reduce the problem of small interference stability in practical engineering application.

Description

technical field [0001] The invention belongs to the technical field of new energy planning and design, and in particular relates to a method and system for identifying key lines of a power electronic multi-infeed power system. Background technique [0002] With the intensification of the global energy crisis and the increasingly severe environmental protection situation, the proportion of new energy units in the power system is gradually increasing; Regions rich in resources are mostly located in the northwest, far away from the load centers in the east. There is a long-term need for large-scale long-distance transmission of electric energy. The clustering of a high proportion of new energy generating units has become an important trend in future development. Studies have shown that after the new energy units with increasing capacity are connected, the power system presents a significant power electronic characteristic, which is prone to small disturbance stability problems ...

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): H02J3/00
CPCH02J3/00H02J2203/10
Inventor 王康李立刘瑶张青蕾李小腾金吉良乔彦君郑天悦唐浩冯雅琳
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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