Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

On-Line Coordinated Control Method of Voltage Based on Energy Margin Constraint

A technology of energy margin and coordinated control, applied in the direction of AC network voltage adjustment, etc., can solve the problems of less consideration of the overall stability of the system, unsatisfactory control efficiency and effect, etc.

Inactive Publication Date: 2015-09-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an online coordinated control of voltage based on energy margin constraints in the PMU environment, aiming at the disadvantages of the existing voltage coordinated control that less considers the global stability of the system and the control efficiency and effect are not ideal. method, on the premise of ensuring the global stability of the system, coordinate the voltage control behavior of the power system with high precision and relatively fast

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
  • On-Line Coordinated Control Method of Voltage Based on Energy Margin Constraint
  • On-Line Coordinated Control Method of Voltage Based on Energy Margin Constraint
  • On-Line Coordinated Control Method of Voltage Based on Energy Margin Constraint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] In the technical solution of the present invention, a variety of voltage control methods are incorporated into a unified energy function framework, and the Lie derivative method is introduced to calculate the energy margin change. The energy margin is not less than zero as the objective function, and the reactive power margin (Reactive Power Margin, RPM) and the voltage variation range are used as constraints to form an approximate linear programming problem, and its solution is a coordinated control strategy, and its implementation method is as follows:

[0029] Step (1): Calculate the energy margin based on the Lie derivative;

[0030] The implementation process of this step is as follows:

[0031] Step (1.1): First, according to the classic rotor motion equation, establish a model containing various energ...

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 electric power system transient stability analysis, and discloses a voltage online coordination control method based on energy margin constraint. The voltage online coordination control method based on energy margin constraint comprises the following steps that (2) a system potential energy function model Ep is built, and an energy margin Em is calculated on the basis of the lie derivative; (2) an approximate linear programming problem is formed by using the energy margin Em as an objective function and using the reactive margin and the voltage allowable change range as constraint conditions; (3) a coordination control strategy is obtained to accomplish coordination of various voltage control modes. According to the voltage online coordination control method based on energy margin constraint, various voltage control modes are brought into a uniform energy function frame, the lie derivative is introduced to calculate changes of the energy margin, the approximate linear programming problem is formed by using the situation that the energy margin is larger than or equal to zero as the objective function and using the reactive margin and the voltage change range as the constraint conditions, and the solution of the approximate linear programming problem serves as the coordination control strategy. According to the voltage online coordination control method based on energy margin constraint, the calculation speed can be increased, generation of the online coordination control strategy of various voltage control modes is facilitated, and the safe operation level of a power grid is improved.

Description

technical field [0001] The invention belongs to voltage stability control technology, in particular to an online voltage coordination control method based on energy margin constraints, and belongs to the technical field of power system transient stability analysis. Background technique [0002] For a long time, voltage control in power systems mainly relies on local information. Coordination among controls is difficult to achieve due to lack of global information. In the PMU (Phase Measurement Unit, phase measurement unit) environment, the acquisition of global real-time data of the power system becomes easier, which means that the use of stability theory and control methods to complete online voltage coordinated control is worth discussing under this condition. Although voltage stability and angular stability are studied separately in some literatures as decoupled phenomena due to the needs of some research purposes, the results that depend on the coupling characteristics ...

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 Patents(China)
IPC IPC(8): H02J3/12
Inventor 刘群英刘起方田贵云田云翔孟劲松任文伟高斌
Owner UNIV OF ELECTRONICS SCI & TECH 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
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