Study Of Simulation On Wave Process And Major Insulation Field For Large Type Transformer Winding

Transformer is the power system in one of the most important electrical equipment, transformer insulation design studies, not only the structural design of power transformers is an important and complex technical issues, but also the power system security, stability, reliability and economic operation of the key one of the factors. Transformer insulation design of the main vertical large power transformers, power transformers, especially high pressure an important part of not only the limit of a single transformer capacity and reliability of decisive significance, and economic indicators of the transformer also has extremely important implications.In this paper, the process of transformer windings and wave converter transformer calculation of transient electric field polarity inversion problem has been studied. For large wave transformer winding process, the need to understand the role of the over-voltage, the gradient along the ring and their corresponding insulation insulation insulation margin. For large converter transformer main insulation field, since the coil, especially between the high voltage coil end of the complexity of the electric field distribution, so as to make the transformer insulation design with the necessary reliability, should be aware of the operation of the transformer being the kinds of parts under the effect of over-voltage electric field distribution, and the converter transformers in the electric field polarity reversal during transient changes in the law.In the power transformer longitudinal insulation structure design process, the process of winding-wave calculation is an important design elements. This article describes the process of transformer winding wave case, write the Matlab-based wave power transformer winding course of the calculation process, an example calculation and verify potential gradient distribution transformer windings, the insulation margin calculation to find the weak point of insulation. And through a process of phase-shifting transformer winding wave experiments and comparative analysis of simulation results, we propose a new structure for the special process of calculating wave transformer winding models and research methods, further research for future reference.Converter transformer is high voltage DC transmission system, one of the important equipment. Converter transformer valve winding during operation under DC, AC composite electric field, but also bear the role of voltage polarity reversal, and thus its internal electric field distribution, space charge accumulation and dissipation characteristics are all there with the very ordinary power transformer big difference. In this paper, the main body of converter transformer insulation calculation model established a transient electric field, respectively, for the isotropic dielectric linear or nonlinear and anisotropic linear or nonlinear computational analysis. Get the actual model of the converter transformers in the insulation test voltage polarity reversal in the transient structural changes in the distribution of electric field for accurate converter transformer insulation structure for the design of useful applications conclusions.