AC-DC hybrid system stability analysis method and system based on mixed potential function

An AC-DC hybrid and system stability technology, applied in the direction of a single AC network with different frequencies, parallel operation of DC power supplies, etc., can solve problems such as difficult to give kinetic energy and potential energy, and the inapplicability of AC-DC hybrid systems, so as to avoid numerical The effect of points

Active Publication Date: 2019-06-07
TSINGHUA UNIV
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The classical energy function method commonly used in large power grids mainly analyzes the kinetic energy and potential energy of the rotating unit (the core dynamic element of the system) in the system, while the main dynamic element in the AC / DC hybrid system is the power electronic device rather than the rotating unit. , the classical energy function method is difficult to give its kinetic energy and potential energy, and it is not applicable to the AC / DC hybrid system

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
  • AC-DC hybrid system stability analysis method and system based on mixed potential function
  • AC-DC hybrid system stability analysis method and system based on mixed potential function
  • AC-DC hybrid system stability analysis method and system based on mixed potential function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0043] The method and system for analyzing the stability of an AC / DC hybrid system based on a mixed potential function according to an embodiment of the present invention will be described below with reference to the accompanying drawings. First, the AC / DC hybrid system based on a mixed potential function according to an embodiment of the present invention will be described with reference to the accompanying drawings Stability analysis method.

[0044] figure 1 It is a flow chart of a method for analyzing the stability of an AC / ...

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 present invention discloses an AC-DC hybrid system stability analysis method and system based on a mixed potential function. The method comprises the following steps of: establishing an equivalentmodel of a mixed potential function theory; constructing a mixed potential function of an AC-DC hybrid system to be researched by employing the equivalent model; and reconstructing the mixed potential function, solving a characteristic root according to the reconstructed mixed potential function, and employing a mixed potential function third stability theory to obtain stability criteria of the AC-DC hybrid system. The method can establish the potential function of the system in terms of energy to avoid complex value integration, facilitate obtaining of dynamic safety criteria in an analysismode and provide basis for formulation of a system safety operation control strategy, and the construction of the potential function of the mixed potential function method aims at a current and a voltage of a special branch of a general non-linear circuit network without relating to the electric quantity of a rotation unit, so that the AC-DC hybrid system stability analysis method and system basedon the mixed potential function are very suitable for construction of the energy function of the AC-DC hybrid system by taking power electronic equipment as a principal thing.

Description

technical field [0001] The invention relates to the technical field of stability analysis of an AC / DC hybrid system of a power electronic transformer, in particular to an AC / DC hybrid system stability analysis method and system based on a mixed potential function. Background technique [0002] In recent years, my country's distributed renewable energy has grown rapidly, and large-scale distributed renewable energy is connected to the grid, which poses new challenges and higher requirements for flexible access and effective control of the system. At present, there are many AC-DC conversion links in the renewable energy access technology, which reduces the efficiency and affects the convenience of access. In addition, the lack of mutual aid and flexible regulation capabilities of the distribution network also limits the full consumption and efficient utilization of distributed renewable energy. Using bidirectional multi-port power electronic transformers to build an AC-DC hyb...

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): H02J3/02H02J1/10
Inventor 郑竞宏赵文志
Owner TSINGHUA UNIV
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