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

Ultrahigh-voltage power distribution power-frequency overvoltage suppression method

A technology for power transmission and overvoltage, which is applied to emergency protection circuit devices, electrical components, circuit devices, etc. for limiting overcurrent/overvoltage, and can solve the problem of power frequency overvoltage, long transmission distance, and transmission capacity of no-load lines. large problems, to achieve the effect of ensuring stability and safety, and smooth current transition

Inactive Publication Date: 2015-06-10
HENAN XINGZHI PATENT SERVICE CO LTD
View PDF2 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main characteristics of UHV transmission in my country are large transmission capacity and long transmission distance. The distance between the energy base in the west and the load center in the east is more than 1000km, and the resulting electromagnetic transient and overvoltage problems are more prominent, mainly manifested in its capacitance. The effect is abnormally significant, resulting in a large no-load line power frequency overvoltage, if no corresponding measures are taken, it will seriously affect the safe operation of the line

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
  • Ultrahigh-voltage power distribution power-frequency overvoltage suppression method
  • Ultrahigh-voltage power distribution power-frequency overvoltage suppression method
  • Ultrahigh-voltage power distribution power-frequency overvoltage suppression method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] Such as figure 1 As shown, it is an UHV power transmission circuit. There is a power frequency overvoltage in power transmission that affects the stability and safety of power transmission. The present invention proposes a controllable shunt reactor model suitable for UHV systems, and makes its structure and principle introduced. Focusing on the analysis of the limitation of controllable reactors on system power frequency overvoltage under different working conditions, it illustrates the effectiveness of controllable shunt reactors in suppressing power frequency overvoltage.

[0042]Power frequency overvoltage will cause changes in system parameters due to circuit breaker operation and various faults (grounding, disconnection, etc.) inside the power grid, causing the oscillation and transmission of electromagnetic energy to cause voltage rise. Its energy comes from the grid itself. And it oscillates on the basis of the power frequency voltage, so its amplitude is roug...

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 provides an ultrahigh-voltage power distribution power-frequency overvoltage suppression method. For the power-frequency overvoltage generated by a no-load long-line capacitance effect, asymmetric ground faults and three-phase load shedding (or three-phase tripping), a shunt reactor is selected, the upper and lower limits selected for the reactor are calculated, and the power-frequency overvoltage of an ultrahigh-voltage power distribution system is limited by virtue of the transient state adjustment and the series switching of the controllable reactor; as a result, the stability and safety of ultrahigh-voltage power transmission can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of UHV power transmission, in particular to a method for suppressing power frequency overvoltage of UHV power transmission. Background technique [0002] In recent years, with the rapid development of my country's national economy, the demand for electricity is increasing day by day, and even some places have electricity shortages during the peak period of electricity consumption, so the establishment of UHV power transmission system will help solve this situation and make resources More optimization, improve energy utilization. The main characteristics of UHV transmission in my country are large transmission capacity and long transmission distance. The distance between the energy base in the west and the load center in the east is more than 1000km, and the resulting electromagnetic transient and overvoltage problems are more prominent, mainly manifested in its capacitance. The effect is abnormally significan...

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
IPC IPC(8): H02H9/04
Inventor 马新攀
Owner HENAN XINGZHI PATENT SERVICE 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