分体式变压器顶层油温升计算模型

建立了分体式冷却变压器顶层油温热路计算模型,根据实测数据和搜索算法对热路模型的热参数进行拟合求取,实例验证并与传统变压器简化的热路计算法和负载导则中的微分方程解法对比分析。

分体式油浸自冷变压器散热器布置方法研究

以一台分体式油浸自冷变压器为例,建立了三维仿真模型,根据有限元计算结果,分析了分体式变压器散热器水平与垂直布置方式对温度场和流速场的影响。

电力变压器局部放电干扰信号抑制的研究

本文中笔者介绍了电力变压器局部放电试验信号的采集方法,分析了空间电磁信号抑制的原理和处理方法,并提出了相关建议。

A Temperature Prediction Model for Oil-immersed Transformer Based on Thermal-circuit Theory

This paper proposed an improved temperature prediction model for oil-immersed transformer.The influences of the environmental temperature and heat-sinking capability changing with temperature were considered.When calculating the heat dissipation from the transformer tank to surroundings,the average oil temperature was selected as the node value in the thermal circuit.The new thermal models will be validated with the delivery experimental data of three transformers: a 220 kV-300 MV.A unit,a 110 kV40 MV.A unit and a 220 kV-75 MV.A unit.Meanwhile,the results from the proposed model were also compared with two methods recommended in the IEC loading guide.

基于声学回波的变压器数字化油位终端

本文中作者提出了一套基于声学回波的数字化油位终端。该装置利用非接触式声学回波原理,实现了变压器油位的精准测量,解决了变压器油位管理中人工巡视工作量大、观测误差大、油位缺陷评价未量化的问题。