变压器噪声分析.pdf

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R. Haettel, M. Kavasoglu, A. Daneryd and C. Ploetner, ABB, 2014-09-18 Prediction of Transformer Core Noise Multiphysics Approach

Presentation Outline  Introduction and Background  Transformer Acoustics  Model development for Core Noise  Electromagnetic Model  Magnetostriction Implementation  Mechanical and Acoustic Models  Model Validation  Conclusion © ABB Group Month DD, Year | Slide 2

Multiphysics Approach  The sound generation in ABB products requires a global understanding of the energy conversion chain from electrical input to noise  Strong interaction among the technical fields is required  Multiphysics Approach implies strong cooperation  Noise level is an essential parameter to assess a product quality Energy Conversion Chain from electric supply to noise Electric Power supply Electro- magnetic System Forces Mechanical System Vibrations Acoustic Environment Noise © ABB Group November 18, 2014 | Slide 4

Project Drivers  Costs for noise issues such as orders lost, costly modifications and overkill margins in design  Significant advances by major competitors in noise mitigation  Increased focus on environmental issues (customer requirements)  Product development: Tools to investigate the impact of present and future requirements and design © ABB Month DD, YYYY | Slide 5

Power Transformers  Power Transformers enable electricity production, transport and distribution at the most convenient (economical) voltages  They can be considered as the “gearboxes” of the electrical grid  A power transformer is a component that receives power at one voltage and delivers virtually the same power at another voltage Generator step-up transformers © ABB Month DD, YYYY | Slide 6 System transformers

Main Components in Power Transformers  Power transformers have a core to handle the magnetic flux  They have windings to lead the currents and to provide the correct voltage  The core, windings, insulation material and mechanical frame constitute the active part ACTIVE PART Core Windings © ABB Month DD, YYYY | Slide 7

Transformer Acoustics  Now: empirical models based on statistics and use of fitting coefficients  Next stage: detailed analysis and models of:  Core in air and oil  Winding in air and oil  Tank and oil interactions  Structural transmission paths  Synthesis phase in the modeling chain: Development of a 3D-model for the whole system  Experimental validation © ABB Month DD, YYYY | Slide 8

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