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

Two-stage power distribution network emergency island division method

A technology of island division and distribution network, applied in photovoltaic power generation, single network parallel feeding arrangement, etc., can solve the problems of slow data refresh, inability to grasp the status of power distribution system in real time, low precision, etc., and achieve the goal of improving load recovery rate Effect

Active Publication Date: 2019-06-07
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +2
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing island division strategy generally suffers from the slow data refresh and low precision of the traditional measurement system, which makes it impossible to grasp the status of the power distribution system in real time. All of them will experience short-term power outages for black start, and cannot guarantee the continuous power supply of key loads; and A deterministic island division scheme is formed, and the island scheme cannot be flexibly modified to deal with new energy power fluctuations to ensure continuous power supply for key loads

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
  • Two-stage power distribution network emergency island division method
  • Two-stage power distribution network emergency island division method
  • Two-stage power distribution network emergency island division method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] This embodiment is realized through the following technical solution, a two-stage distribution network emergency islanding method, including a pre-fault islanding strategy and a post-fault islanding strategy. First of all, according to the real-time measurement information before the failure, the main goal is to ensure the smooth transition of the system failure time, and the island division optimization model before the failure is continuously solved at a certain time interval, and the original island division scheme before the failure that satisfies the current state of the system is obtained; The original island plan before the failure is corrected for load increase and load reduction, and the online island division decision table is obtained, which is convenient for real-time query at the time of failure to obtain a load shedding plan that me...

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 relates to the technical field of power supply, and particularly relates to a two-stage power distribution network emergency island division method. The method comprises the steps: before a fault occurs, taking the guaranteeing of the stable transition of a system fault moment as a main target according to measurement information of a wide-area measurement system of a power distribution network, continuously solving a pre-fault island division optimization model at a certain time interval, and obtaining a pre-fault original island division scheme meeting the current state of thesystem; carrying out load increasing and load reducing correction of the original island scheme before the fault to obtain an island online division decision table, thereby facilitating real-time query at a fault moment to obtain a load shedding scheme meeting a system real-time state; after the system enters the initial island state through the execution decision table, dividing the whole power failure period into a plurality of time periods according to the estimated power failure time; taking the increase of the number of recovered loads as a target, solving the Look-ahead roll island division optimization model after the fault to obtain the latest island division scheme, and executing the latest island division scheme. According to the invention, the method guarantees the continuous power supply of a key load during the fault.

Description

technical field [0001] The invention belongs to the technical field of power supply, and in particular relates to a method for dividing emergency islands of a two-stage power distribution network. Background technique [0002] Power systems are facing more and more outage events. On the one hand, the increasing probability of natural disasters, such as typhoons and mountain torrents, has led to a large number of equipment failures such as downed poles and disconnected wires; on the other hand, power electronic equipment, such as photovoltaics input, resulting in more complex operation control, which will cause the occurrence of power grid faults. Failure of the transmission network can easily lead to a major blackout in the entire power distribution area. At this time, it is impossible to quickly restore power supply to key loads through traditional load transfer methods, which will seriously affect social production activities in key areas and cause huge economic losses. ...

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): H02J3/38
CPCY02E10/56
Inventor 李鹏徐箭徐全谢博宇袁智勇廖思阳白浩雷金勇史训涛姜臻于力张斌熊文危国恩
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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