基于TDOA的变压器局放组合定位与监测天线优化布置方法研究OA

The accurate detection of partial discharge in transformers is crucial for the state assessment of power equipment and the safety of the power grid.Research on the propagation characteristics of partial discharge of ultra-high frequency(UHF)signals based on full-scale transformers remains relatively limited,and few scholars thor-oughly examine the UHF signal propagation behavior inside transformers.In this paper,the propagation and attenua-tion characteristics of partial discharge of the UHF electromagnetic waves is firstly studied and analyzed and,at the same time,a UHF-based partial discharge localization approach—specifically,a combined transformer partial dis-charge localization method utilizing the TDOA-based UHF technique,is proposed.These research efforts provide a theoretical basis for the optimal placement of monitoring antennas.Then,the Peano fractal antenna is studied and,at the same time,a new ultra-high frequency oil valve antenna is designed.After that,an optimized layout model for the ultra-high frequency monitoring antenna is set up by arranging multiple local discharge sources in the transform-er and multiple Peano fractal antennas as well as ultra-high frequency oil valve antennas at appropriate positions on the box.It is found through analysis that both amplitude and accumulative energy of the simulated and measured sig-nals exhibit a generally consistent trend,which demonstrates the effectiveness of the proposed modeling method and provides a model foundation and support for the subsequent optimization of UHF antenna placement.