Converter transformer regulating winding layout optimization method based on space magnetic field distribution

Abstract

The invention discloses a converter transformer voltage regulating winding layout optimization method based on space magnetic field distribution, and the method comprises the steps: building an internal transient electromagnetic field equation of a converter transformer under a low-frequency condition through a Maxwell equation set, and building a three-dimensional converter transformer simulationmodel; adjusting the heights of the voltage regulating windings in symmetrical arrangement, comparing the influence rule conditions of different heights of the voltage regulating windings on spatialmagnetic field distribution distortion, establishing a spatial magnetic field distribution cloud chart, and providing a voltage regulating winding height optimal arrangement scheme based on winding end space magnetic flux leakage distribution. Meanwhile, by means of finite element analysis software, simulation calculation is conducted on the + / -500 kV converter transformer winding, the effectiveness and correctness of the method are proved by analyzing and comparing the spatial magnetic field distortion rules of the transformer under different conditions, the internal magnetic field conditioncan be truly reflected, theoretical basis and design reference are provided for internal insulation and structure optimization of the converter transformer, and the safety operation stability of the converter transformer in a power transmission system is improved.

Description

technical field [0001] The invention relates to the field of converter transformer optimization, in particular to a method for optimizing the layout of a converter transformer voltage regulating winding based on spatial magnetic field distribution. Background technique [0002] As one of the key equipment of HVDC transmission line, converter transformer plays a vital role in the safety of power grid operation. In the DC transmission system, the operating voltage level of the converter transformer is high, the current harmonic content is complex, and at the same time it has to withstand the mixed AC and DC environment. Therefore, when designing the converter transformer, internal winding arrangements, insulation conditions, outlet devices and external boxes There are significant differences in the body structure. Therefore, due to the different internal structure of the converter transformer and the impact of the operating environment on the design of the converter transform...

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Problems solved by technology

[0004] In view of the above problems, the present invention proposes a method for optimizing the layout of the voltage regulating winding of a converter transformer based on the spatial magnetic field distribution, which mainly solves the problem that using the existing transformer internal magnetic field analysis method for analyzing and optimizing the converter transformer cannot truly reflect the internal magnetic field situation

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