A three -phase transformer three -phase model automatic generation method

A three-phase transformer, automatic generation technology, applied in the direction of instrumentation, electrical digital data processing, design optimization/simulation, etc., can solve the problems of manual derivation, such as laborious and laborious, and achieve the effect of solving laborious and laborious, error-prone, and improving efficiency

Inactive Publication Date: 2019-03-15
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

[0058] In order to solve the above-mentioned problems existing in the prior art, the present invention will propose a method for automatically generating a three-phase model of a distribution three-phase transformer based on Matlab, so as to solve the problem of laborious manual derivation and improve the efficiency of obtaining the three-phase model of a three-phase transformer. efficiency and accuracy

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  • A three -phase transformer three -phase model automatic generation method
  • A three -phase transformer three -phase model automatic generation method
  • A three -phase transformer three -phase model automatic generation method

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Embodiment Construction

[0099] The present invention will be further described below by taking the three-phase transformer connected by YN and d1 as an example in conjunction with the accompanying drawings.

[0100] A. Establish the original admittance matrix Y of the three-phase transformer p

[0101]

[0102] In the formula, α 0 is the non-standard transformation ratio of the primary winding, and is the ratio of the rated voltage of the primary side to the per unit value reference voltage of the primary side, β 0 is the non-standard transformation ratio of the secondary winding, is the ratio of the rated voltage of the secondary side to the per unit value reference voltage of the secondary side, and y is the admittance of each equivalent value of the three-phase transformer, and its expression is

[0103] y=1 / z=1 / (r+jx) (25)

[0104] In the formula, z, r, and x are the equivalent impedance, equivalent resistance and equivalent leakage reactance of each phase winding of the three-phase transfo...

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Abstract

The invention discloses a power distribution three-phase transformer three-phase model automatic forming method comprising the following steps: building a three-phase transformer original admittance matrix; selecting a three-phase transformer original secondary line winding connection and group; forming a related matrix according to the three-phase transformer original secondary line winding connection and group, and modifying the original admittance matrix; using a latex function to convert and process the matrix, introducing processed matrix into a MathType formula editor, and displaying same. The invention provides a three-phase transformer model automatic derivation method based on Matlab symbol operation; a user selects the three-phase transformer original secondary line winding connection and group; software uses symbol operation to automatically derive the three-phase transformer node admittance model, thus ensuring derivation result accuracy, and improving three-phase transformer three-phase model resolving efficiency. The invention edits corresponding software of the forming method, thus solving the manual derivation easy failure problems, and improving three-phase transformer three-phase model resolving accuracy.

Description

technical field [0001] The invention relates to a method for generating a three-phase model of a distribution transformer, in particular to a method for generating 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 characteris...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02E60/00
Inventor 姚玉斌林川博阳义青吴志良
Owner DALIAN MARITIME UNIVERSITY
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