Study Of Electrostatic Field Of Power Transformer Based On Numerical Calculation

Compared with the new technology which represented by CAD and CAE,traditional designmethod has already been no longer suitable for the need of the modern market competition intransformer Industry. Using method of CAE, we can study the static and dynamic characteristicof component in simulation environment, not to spend great experiment cost. Application ofCAE in design and produce of transformer can remarkable improvement design performance ofproducts, shorten design cycle, strengthen the market competitiveness of the products.In order to confirm the insulating structure of transformer rationally and reliably, theelectric field distribution of transformer must be analyse and study. This paper exhaustiveanalyse the electric field distribution of power transformer main and vertical insulation structureusing numerical calculation method based on the electromagnetic theory. The transformerelectric field finite element model has been established utilizeing APDL(ANSYS ParametricDesign Language). Through the massive analyses computation, we obtained the powertransformer host insulation structure electric field distribution map as well as relational curvebetween the insulation structure and the electric field intensity . Meanwhile the method forcalculating the equivalent inductance and capacitance parameters of power transformer windingis studied embarked from the project application angle. A model of impulse voltage distributionon transformer winding is build up, and impulse voltage distribution about time and positionhave been given. finally, the electric field distribution in weakness of insulation structure iscalculated, and the affect of axial insulation structure and the electric field intensity have beenobtained. Through the transformer electric field analysis, provides the theory basis for the powertransformer reliable movement and the insulation structure design.