Single-phase transformer high-frequency model establishing method based on VF method

A single-phase transformer and model building technology, which is applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of slow processing and poor accuracy

Inactive Publication Date: 2015-10-07
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Existing methods for establishing high-frequency models of single-phase transformers usually use complex mathematical models, which are slow in processing and poor in accuracy, and are difficult to meet actual needs

Method used

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Embodiment Construction

[0017] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0018] A method for establishing a high-frequency model of a single-phase transformer based on the VF method, comprising the following steps:

[0019] Step 1. Consider the single-phase transformer as a two-port network, use a network analyzer to measure the scattering parameter (Scattering Parameter, S parameter) of the single-phase transformer, and obtain the scattering matrix S of the transformer, as follows:

[0020] S = S 11 S 12 S 21 S 22

[0021] The reaso...

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Abstract

The present invention relates to a single-phase transformer high-frequency model establishing method based on a VF method, which is characterized by comprising the following steps of: using a single-phase transformer as a two-port network and measuring a scattering parameter of the single-phase transformer; converting the scattering parameter into admittance parameters to obtain admittance parameters of three branch circuits to be fit and respectively carrying out fitting on the admittance parameters of the three branch circuits to be fit by applying a vector matching method; and according to an admittance parameter expression obtained after fitting, establishing an inverted U-shaped equivalent circuit of the admittance parameter expression by applying a circuit comprehensive theory so as to obtain a single-phase transformer high-frequency model. According to the present invention, the black box design idea is adopted; and the single-phase transformer high-frequency model can be widely used for simulating calculation of an overvoltage, a lightning overvoltage and the like so as to provide reference for power operation personnel.

Description

technical field [0001] The invention belongs to the technical field of single-phase transformers, and in particular relates to a method for establishing a high-frequency model of a single-phase transformer based on a VF method. Background technique [0002] The transformer is an important device in the power system. In the simulation calculation of the power system, it is necessary to establish a power transformer model. The transformer model can be divided into medium and low frequency models and high frequency models according to the frequency. The high frequency model of the transformer can be used for simulation analysis under high frequency signals. Existing methods for establishing high-frequency models of single-phase transformers usually use complex mathematical models, which are slow in processing and poor in accuracy, and are difficult to meet actual needs. Contents of the invention [0003] The object of the present invention is to overcome the deficiencies of ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 杨磊郗晓光姚瑛
Owner STATE GRID TIANJIN ELECTRIC POWER
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