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

Transformation matrix-based transformer three-phase model building method

A technology for model establishment and transformation matrix, applied in instruments, special data processing applications, electrical digital data processing, etc., which can solve the problems of error-prone, complicated programming, time-consuming and labor-intensive three-phase models, etc.

Active Publication Date: 2018-09-28
DALIAN MARITIME UNIVERSITY +1
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to design a perfect three-phase power flow calculation program for the distribution network, the programmer needs to manually derive the three-phase models of the transformers in these connection groups one by one, which is very inconvenient and difficult to guarantee the accuracy of the derived three-phase model of the transformer
Therefore, Chinese patent CN201610579878.4 proposes a method for automatically generating a three-phase model of a power distribution three-phase transformer, which can make full use of Matlab's unique characteristics of being good at matrix operations and complex operations, and use symbolic operations to automatically derive the nodal admittance of the three-phase transformer The matrix model solves the time-consuming and labor-intensive problem of manually deriving the three-phase model of the distribution three-phase transformer, and improves the efficiency of obtaining the three-phase model of the three-phase transformer
However, when this method derives the nodal admittance matrix model of the three-phase transformer, it uses many correlation matrices, which are relatively complex and prone to errors in programming, which still needs further optimization and simplification of the modeling process
In addition, the traditional correlation matrix method cannot directly deduce the nodal admittance matrix of the three-phase transformer whose primary and secondary windings are connected in a star-shaped neutral point.

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
  • Transformation matrix-based transformer three-phase model building method
  • Transformation matrix-based transformer three-phase model building method
  • Transformation matrix-based transformer three-phase model building method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0239] The derivation process of the transformer three-phase model of the present invention will be further described below in conjunction with the accompanying drawings by taking the three-phase transformer connected with Yyn0 and Yyn6 as an example.

[0240] (1) Derivation of transformer three-phase model for Yyn0 connection

[0241] according to Figure 8 and Figure 9 The transformation matrix-based transformer three-phase model establishment method is shown to obtain Figure 7 (a) Transformer three-phase model with Yyn0 connection shown. Input transformer primary side connection mode k 1 is Y, the transformation ratio is α; the connection mode of the secondary winding is k 2 is yn, transformation ratio is β; transformer connection group label k 3 is 0.

[0242] As a result of the operation, the voltage transformation matrix and current transformation matrix of the three-phase transformer connected to Yyn0 are:

[0243]

[0244]

[0245] Get the nodal admittan...

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 transformation matrix-based transformer three-phase model building method. The method comprises the following steps of establishing an original admittance matrix Yp of a three-phase transformer, and according to primary and secondary side connection modes of the transformer, modifying a transformation ratio of the matrix Yp; according to the primary side connection mode,determining a primary side voltage transformation matrix Cp; according to a primary and secondary side wiring mode, determining Csp and Cps; according to mark numbers of groups, converting a basic secondary side voltage transformation matrix Css through a transformation matrix to obtain a secondary side voltage transformation matrix Cs and modifying Cps; according to sub-matrixes of the voltage transformation matrixes, forming a voltage transformation matrix C and a current transformation matrix G of the transformer; and according to the matrix Yp and the transformation matrix, deriving a nodeadmittance matrix YTn of the three-phase transformer. The method solves the problem that a relation matrix method is not suitable to obtain node admittance matrixes of transformers of certain connection groups, further reduces the software writing workload and the error probability, and improves the accuracy of obtaining a three-phase model of the three-phase transformer.

Description

technical field [0001] The invention relates to a method for establishing a three-phase model of a transformer, in particular to a method for establishing a three-phase model of a distribution three-phase transformer used in the calculation of the three-phase power flow of a distribution network. Background technique [0002] The power distribution system is a network system that directly distributes electric energy to end users, which is composed of distribution lines, distribution transformers, distribution voltage regulators, distribution switches, distribution capacitors and distribution loads. To conduct power system analysis, it is first necessary to establish a suitable model for each component in the system. Different from the three-phase symmetrical operation mode of the high-voltage transmission network, the load and network of the distribution network may be asymmetrical. When performing power flow calculations on the distribution network, the characteristics of t...

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): G06F17/50
CPCG06F30/20
Inventor 姚玉斌吴志良王丹
Owner DALIAN MARITIME UNIVERSITY
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