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A method and system for modeling a three-phase transformer electromagnetic transient mid-low frequency model

A three-phase transformer, electromagnetic transient technology, applied in instruments, electrical digital data processing, computing, etc., can solve problems such as low-frequency model modeling, and achieve the effect of simplifying the modeling process, improving modeling efficiency, and improving calculation accuracy

Active Publication Date: 2021-11-16
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

[0006] The present invention provides a method and system for modeling a three-phase transformer electromagnetic transient mid-low frequency model to solve the problem of how to model a three-phase transformer electromagnetic transient mid-low frequency model

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  • A method and system for modeling a three-phase transformer electromagnetic transient mid-low frequency model
  • A method and system for modeling a three-phase transformer electromagnetic transient mid-low frequency model
  • A method and system for modeling a three-phase transformer electromagnetic transient mid-low frequency model

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[0045] Exemplary embodiments of the present invention will now be described with reference to the drawings, however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for exhaustive and complete disclosure invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0046] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or overly formal meanings.

[0047] figure 1 It...

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Abstract

The invention discloses a method for modeling a three-phase transformer electromagnetic transient medium-low frequency model: select the iron core joint as the magnetic circuit subpoint of the transformer model, and divide the transformer into partitions; According to the spatial distribution of each component, establish the equivalent model of the magnetic circuit; classify according to the physical properties represented by each magnetoresistive element, build a circuit model according to the relevant parameters of the element and the principle of electromagnetic duality, and simplify it according to the topological connection relationship; according to the transformer The loss characteristics of the magnetic material, using the dynamic loss model to simulate the transformer core loss; combining the circuit model and the dynamic loss model, the obtained combination model is used to simulate the nonlinear excitation and loss characteristics of the transformer core; calculate some parameters of the transformer circuit, and The linear transformer model is used for simulation; the combined model representing the transient characteristics of the transformer core is connected to the low-voltage side of the linear transformer model; the parameters of the transformer are calculated.

Description

technical field [0001] The invention relates to the technical field of transformer modeling, and more specifically, to a modeling method and system for a three-phase transformer electromagnetic transient mid-low frequency model. Background technique [0002] As one of the most important power transmission and transformation equipment in the power system, the transformer is responsible for the collection, distribution and measurement of electric energy. With the wide application of UHVDC transmission technology, the transient characteristics of transformer cores under AC-DC hybrid excitation conditions have received increasing attention. In addition to the normal operation of the transformer and the changes caused by the load increase or decrease during the operation process, the abnormal electromagnetic transient process of the transformer at low frequency mainly includes DC bias and excitation inrush current. The main cause of DC bias is the (static quasi) DC injected into...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/367
CPCG06F30/367
Inventor 李金忠张书琦李金龙汪可李鹏孙建涛赵志刚王健一徐征宇赵晓宇申泽军
Owner CHINA ELECTRIC POWER RES INST
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