变压器防尘网格栅设计

Design of dust filter mesh for transformer

针对防尘网格栅宽度设计不合理影响变压器散热的问题,文中提出了一种变压器防尘网格栅宽度设计方法,该方法在保证变压器散热效果的基础上,从风速衰减率和防尘网重量2个目标出发,建立优化模型,进而求解得到防尘网最优格栅宽度。在充分研究防尘网格栅结构的基础上,详细给出了防尘网最优格栅宽度设计步骤,并以1000 kV特高压变压器为例,计算得到了最优格栅宽度。最后经第三方风阻率测试和现场试验,结果表明该方法设计的防尘网在保证变压器散热效果的基础上,有效降低了防尘网重量,安装便捷、经济实用,从而验证了该方法的有效性与可行性。

In view of the unreasonable design of the dust filter mesh affecting the cooling effect of the transformer,a method for designing dust filter mesh width of transformer is proposed,which aims to reduce wind speed decay rate and dust filter weight,then establishes an optimal model on the basis of ensuring cooling effect of transformer,therefore the optimal value of mesh width for dust filter can be obtained.Based on the study of the structure of dust filter,the specific steps of the above method are displayed,and the optimal value of mesh width for dust filter is calculated for taking the cooler of 1000 kV UHV transformer as an example.Finally,the wind speed decay rate test and field test verification have been done,which show that dust filter mesh width of transformer designed by this method can reduce the weight of dust filter,and be economical and practical on the basis of ensuring cooling effect of transformer,it verifies its validity and feasibility.