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

Method for improving stability of sending-end power grid by utilizing static var compensator

A technology of static var compensation and stability, applied in the direction of reactive power adjustment/elimination/compensation, reduction/prevention of power oscillation, single-network parallel feeding arrangement, etc. , large voltage and reactive power fluctuations, etc., to achieve the effect of improving voltage stability, improving economic benefits and stability, and improving dynamic stability

Pending Publication Date: 2020-05-19
国网内蒙古东部电力有限公司经济技术研究院 +3
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country's current power grid is limited by the reverse distribution of energy and load centers. Domestic large-scale wind power and photovoltaics generally adopt the development model of "centralized development and long-distance transmission". Long distance, little or no load access, weak grid structure, and the characteristics of weakly connected sending-end grid, its voltage and reactive power fluctuate greatly, which is easy to cause voltage over-limit, etc., and may also be caused by low / High-voltage ride-through causes large-scale new energy off-grid, affecting the safe and stable operation of the grid
[0004] In addition to wind power and photovoltaic energy, some power grids also have some thermal power and hydropower energy. Because their scale is relatively small compared with new energy sources, and when power is supplied to distant places through weakly connected sending-end power grids, the power grid is prone to weakly damped oscillation modes. After the power grid suffers from small disturbances and serious faults, there will be long-term power oscillations in the power grid that cannot be calmed down quickly, which will also affect 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
  • Method for improving stability of sending-end power grid by utilizing static var compensator
  • Method for improving stability of sending-end power grid by utilizing static var compensator
  • Method for improving stability of sending-end power grid by utilizing static var compensator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, it is the control system model of the static var compensator, the static var compensator is installed inside the substation, and the voltage control measure is to collect the bus voltage V of the substation T As the control system input signal, the reference voltage for voltage regulation is V REF , the static var compensator is equivalent to an admittance B SVS Connect to the grid system. When the system voltage is sent changing, according to V T with V REF The deviation, through the limiting link, the leading lag link, the phase shifting link, etc., is finally reflected in the equivalent admittance B SVS The change of the static var compensator changes the reactive power input to the grid, and suppresses the change of the system voltage.

[0021] Such as figure 2 As shown, i...

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 method for improving the stability of a sending-end power grid by utilizing a static var compensator. The problems of voltage stability and dynamic stability of a sending-endpower grid are solved. Voltage control and damping control of the static var compensator are integrated, and the intensity of the voltage control and the damping control of the static var compensatoris adjusted through control parameters in different stages of power grid development, so that the voltage stability and the dynamic stability of a sending-end power grid both meet stable operation requirements. The method can enhance the adaptive capacity of the static var compensator, and has the advantages of improving the power supply reliability of the sending-end power grid and ensuring thestable operation of the power grid.

Description

technical field [0001] The invention belongs to the field of power system voltage and dynamic stability, and particularly relates to a method for improving the stability of a power grid at a sending end by using a static var compensator. Background technique [0002] With the rapid development of the power supply and load of the power grid, the transmission power of existing and new transmission lines is getting heavier and heavier. In order to increase the transmission power of existing transmission lines and minimize the loss of transmission lines, it is necessary to realize reactive power control of transmission lines. With the emergence and application of thyristors, a new type of thyristor-based reactive power control device has been produced, which has a very fast response speed. Using this fast response characteristic, the damping control function can also be added to the voltage and reactive power. In control, static var compensator, as a thyristor-based fast reactiv...

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): H02J3/18H02J3/46H02J3/24
CPCH02J3/18H02J3/46H02J3/24Y02E40/10
Inventor 刘万福徐明忻赵树野佟宇梁党伟刘宏扬高玉喜王新宝刘伟航韩连山赵立军刘玲玲
Owner 国网内蒙古东部电力有限公司经济技术研究院
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