基于不同放电模型的变压器局部放电光学特性研究

基于建立的真实变压器故障模型模拟变压器内部不同放电类型,同时为捕捉局部放电时的光学效应,建立基于光学传感器的局部放电光局放检测系统。研究中通过外施电压对沿面放电和悬浮放电缺陷模型进行加压产生局部放电信号,研究结果表明:局部放电的光学信号能够有效反应变压器内部局部放电的产生和发展过程。放电图谱中放电点的密集度,可直观评估放电的强烈程度。当放电趋于稳定时,沿面放电点的光学放电信号相位主要分布在60°~150°和240°~330°之间,悬浮放电点相位主要集中在260°~320°之间,根据光局放信号的相位特性,可以明确区分变压器内部的沿面放电和悬浮放电现象,为变压器光局放检测技术的应用奠定了基础。

Research on the Optical Properties of Transformers Partial Discharge Based on Different Discharge Models

In this paper , the different types of discharge in transformer were simulated based on the establishment of the real transformer fault model .Meanwhile , the optical partial discharge detection system was established based on optical sensors which was capture partial discharge accompanied by optical effects .In this research , the surface dis-charge and suspended discharge defect model were pressurized to generate partial discharge signals .The results showed that the partial discharge optical signals can effectively respond the production and development process of par -tial discharge in transformer .It is able to assess discharge level as well .When the discharge phenomenon stabilized , the phase of surface discharge was mainly between 60°~150°and 240°~330°, the phase of suspended discharge was mainly between 260°~320°.According to the phase characteristic of partial discharge signals , the creeping dis-charge and suspended discharge phenomenon of transformer can be distinguished .It laid the foundation for the appli-cation of detection technology of optical partial discharge in transformer .