Dynamic reactive reserved optimizing method for improving long-term voltage stabilization in AC/DC (Alternating Current/Direct Current) power grid

A technology of voltage stabilization and optimization method, which is applied in the direction of AC network voltage adjustment, DC network circuit device, reactive power compensation, etc., and can solve problems such as loss and imperceptibility

Active Publication Date: 2015-02-18
STATE GRID CORP OF CHINA +1
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the concealment and suddenness of the voltage stability problem, it is difficult to detect it during the accident. Once a voltage collapse occurs, it will inevitably cause extremely huge losses in the actual situation of my country's current 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
  • Dynamic reactive reserved optimizing method for improving long-term voltage stabilization in AC/DC (Alternating Current/Direct Current) power grid
  • Dynamic reactive reserved optimizing method for improving long-term voltage stabilization in AC/DC (Alternating Current/Direct Current) power grid
  • Dynamic reactive reserved optimizing method for improving long-term voltage stabilization in AC/DC (Alternating Current/Direct Current) power grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0145] Such as image 3 As shown, for the 3-machine 10-node system, the 500kV bus (Bus6) supplies power to two loads in the load area, and the industrial load (node ​​Bus7) is connected to the 500kV load bus through an OLTC transformer, while the residential load and the commercial load (node ​​Bus10 ) is connected to the 500kV load bus through two OLTC transformers and a section of impedance representing the secondary transmission system. There is a 1600MVA equivalent generator (node ​​Bus3) in the load area, and a large number of parallel compensation devices are used. Node 8 is equipped with a static var compensator (SVC) with a capacity of ±240Mvar and a capacitor bank with a capacity of 600Mvar. , each group of capacitors has a capacity of 100Mvar, a total of 6 groups. Two remote generators transmit power to the load area through four 500kV lines and one bipolar DC transmission line. The main model used in the simulation: transformers (Bus9~Bus10) are OLTC transformers,...

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 a dynamic reactive reserved optimizing method for improving the long-term voltage stabilization in an AC / DC (Alternating Current / Direct Current) power grid. The method comprises the steps below: determining a key failure integration for affecting the long-term voltage stabilization in the AC / DC power grid; adjusting reactive power output of dynamic reactive compensation equipment, and calculating the flexibility of the dynamic reactive compensation equipment; ordering m dynamic reactive compensation equipments, and calculating the weighting coefficients of the dynamic reactive compensation equipments; calculating the reserved capacity of the dynamic reactive compensation equipments, and building and resolving a dynamic reactive reserved optimization model. According to the method provided by the invention, the auxiliary decision support can be provided to improve the long-term voltage stabilization level in a multi DC droppoint power grid; furthermore, the dynamic reactive reserved optimizing method has significance on the improvement on the long-term voltage stabilization allowance in the AC / DC power grid, the construction of the smooth power transmission channels between a transmission end and a receiving end, the improvement on the delivery capacity of a DC power transmission channel, and the improvement on the economy and power quality of the operation of the power grid.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a dynamic reactive power reserve optimization method for improving medium- and long-term voltage stability of AC and DC power grids. Background technique [0002] Since the problem of voltage stability has been valued by scholars at home and abroad, it has developed into multiple research branches, and there is a clear and reasonable definition of voltage stability. After years of research efforts, electric power scholars have achieved fruitful results in some fields of voltage stability. Achievements, such as static voltage stability analysis, small disturbance voltage stability in dynamic voltage stability, and transient voltage stability analysis, have formed a relatively complete set of research theories and analysis methods, which can be used in power system dispatching operation and monitoring control. play an irreplaceable role. However, at pres...

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): H02J3/16H02J1/00G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06H02J1/00H02J3/16Y02E40/30
Inventor 王琦张健刘丽平刘明松林伟芳
Owner STATE GRID CORP OF CHINA
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