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

500-220kV regional power grid automatic voltage control method based on voltage trend prediction

A regional power grid and automatic voltage technology, applied in the direction of AC network voltage adjustment, can solve problems such as the influence of safe and stable operation of the power grid

Active Publication Date: 2020-04-10
YUNNAN POWER GRID CO LTD KUNMING POWER SUPPLY BUREAU
View PDF16 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Load fluctuations have a greater impact on the safe and stable operation of the 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
  • 500-220kV regional power grid automatic voltage control method based on voltage trend prediction
  • 500-220kV regional power grid automatic voltage control method based on voltage trend prediction
  • 500-220kV regional power grid automatic voltage control method based on voltage trend prediction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] The automatic voltage control method of 500-220kV regional power grid based on the voltage trend prediction proposed by the present invention, its flow chart is as follows figure 2 shown, including the following steps:

[0059] (1) Set the automatic voltage control period as T c ;

[0060] (2) When each automatic voltage control cycle arrives, the future T of the equivalent load of the 220kV substation busbar is obtained from the monitoring system of the power grid dispatching center f Minute load active power and reactive power prediction value S pq,m , where m=1...M, where M is the serial number of the load forecast value;

[0061] (3) Obtain the grid network structure data from the monitoring system of the grid dispatching center, construct a 500-220kV regional grid model, denoted as

[0062]

[0063] in, Indicates the 500kV main transformer in the 500kV substation, and there are a total of N sets of 500kV main transformers; Indicates the 500kV busbars ...

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 a 500-220kV regional power grid automatic voltage control method based on voltage trend prediction, and belongs to the technical field of power system automatic voltage control. The method comprises the following steps: when each automatic voltage control period arrives, reading in and obtaining ultra-short-term load prediction of each 220kV transformer substation at the lower level of the 500-220kV regional power grid, and calculating the trend of the 500-220kV regional power grid in the future and the fluctuation amplitude of the voltage value of the 220kV bus in the500-220kV regional power grid according to the ultra-short-term load prediction; further calculating the voltage safety threshold value of the 220kV bus in the 500-220kV regional power grid accordingto the fluctuation amplitude of the voltage value, and inputting the voltage safety threshold value into an automatic voltage control system to realize prevention and control. By adopting the method,220kV bus voltage out-of-limit caused by a subordinate 220kV transformer station of a 500-220kV regional power grid in the future load change process can be prevented and controlled, and the safety and stability of the power grid are improved.

Description

technical field [0001] The invention relates to an automatic voltage control method for a 500-220kV regional power grid based on voltage trend prediction, and belongs to the technical field of automatic voltage control of electric power systems. Background technique [0002] Automatic voltage control (hereinafter referred to as AVC, Automatic Voltage Control) system is an important means to achieve safe (improved voltage stability margin), economical (reduced network loss), and high-quality (improved voltage qualification rate) operation of the transmission network. The AVC system architecture is based on the grid energy management system (EMS), which can use the real-time operation data of the transmission network to scientifically make the best reactive power and voltage adjustment plan from the perspective of overall optimization of the transmission network, and automatically send it to power plants, substations and subordinates The power grid dispatching organization exe...

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): H02J3/12
CPCH02J3/12Y02E40/30
Inventor 王杰鸿姚朝李小江辛平安汤磊魏靖王鹏邓成兰刘永峰李滢洁王磊刘裕明
Owner YUNNAN POWER GRID CO LTD KUNMING POWER SUPPLY BUREAU
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