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

A Power System Interval Power Flow Method Based on Convex Polygons

A convex polygon and power system technology, applied in the field of power system interval power flow based on convex polygon, can solve problems such as too large interval interval, too conservative interval power flow solution, no reference value, etc., to achieve accurate calculation and improve reliability Effect

Active Publication Date: 2022-08-05
WUHAN UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The initial interval power flow is to simply apply interval analysis to the calculation of the power flow equation. Due to the conservative nature of the interval algorithm itself, the interval power flow solution is too conservative and the interval is too large. The result does not have much reference value

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
  • A Power System Interval Power Flow Method Based on Convex Polygons
  • A Power System Interval Power Flow Method Based on Convex Polygons
  • A Power System Interval Power Flow Method Based on Convex Polygons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0048] In this embodiment, the mathematical model of interval variables is first improved: for a pair of correlated interval variables, the parallelogram model is commonly used, but the correlation between the model and the actual situation may still have a certain deviation. The improvement is mainly due to the consideration of the correlation between some variables in the power grid. For example, in the wind farm, there is a certain correlation between the output power of adjacent wind turbines due to the wake effect. A convex polygon model is constructed for the correlation of interval variables and applied to the interval power flow calculation. This embodiment is based on the parallelogram model, improves the actual situation that may exist, and proposes a convex polygon model.

[0049] This embodiment improves the current interval power flow a...

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 power system power flow analysis technology, in particular to a power system interval power flow method based on convex polygons. Based on the existing affine algorithm, the uncertainty power flow equation is improved, and the traditional Newton-Raphson iteration method is used. Convert it into a nonlinear optimization problem; select the interval variables with correlation in the power system, sample them and construct a convex polygon model; perform analytical transformation on the convex polygon model, and transform the correlation of interval variables into inequality constraints; Simultaneous Using the inequality constraints of the power flow equation transformed by the affine algorithm and the constraints of the interval variable correlation transformation, a new set of constraints is obtained, and the objective function of the power flow calculation is optimized and solved with the new constraints, and finally the interval power flow is obtained. interval solution. The method takes into account the correlation between variables that may exist in the power system, which is more in line with the actual power grid operating conditions, and improves the reliability of power system planning and dispatching.

Description

technical field [0001] The invention belongs to the technical field of power flow analysis of power systems, and in particular relates to a power system interval power flow method based on convex polygons. Background technique [0002] Power flow calculation is one of the most basic tools for power system analysis. The most commonly used methods are the Newton-Raphson method and the forward-backward substitution method, which have good practicability and universality for conventional deterministic power flow calculation. However, in the actual operation of the power system, the fluctuation of the load and the intermittent power injected by the wind turbine and other generators will make the power flow calculation have the characteristics of uncertainty. For the uncertain power flow of the power system, the interval power flow algorithm based on interval analysis is widely used due to the advantages of simple and efficient interval analysis. [0003] The initial interval pow...

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): H02J3/06
Inventor 冉晓洪冷仕鹏刘开培陈书瑶张珣玥李思伟
Owner WUHAN UNIV
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