GIS中线形颗粒起举电压的影响因素

发布时间：2018-06-13 18:45

本文选题：气体绝缘组合电压 + 线形颗粒　；参考：《中国电机工程学报》2017年01期

【摘要】：为研究颗粒尺寸、数量及壳体振动对颗粒起举电压的影响,在实验室中制备了以实际126k V气体绝缘组合电器(gas insulated switchgear,GIS)设备为原型等比例缩小的试验腔体,仿真分析了GIS内部线形颗粒的受力,记录并观察了不同条件下颗粒的常规脉冲电流信号、超声信号和颗粒的运动轨迹。研究结果表明:在GIS运行电压下平躺线形颗粒材质一定的情况下,颗粒的起举电压由颗粒的半径决定,而与颗粒的长度无关,随着线形颗粒材质密度的增加,颗粒的起举电压增大;随着相邻颗粒数量的增加,颗粒的起举电压呈下降趋势;GIS腔体的振动会使颗粒获得一定的初速度,进而使得颗粒的起举电压大大下降;不同运动状态金属颗粒的放电信号存在明显的差别,采用颗粒的超声幅值飞行时间二维散点图可对颗粒数量及跳动的剧烈程度进行判断。通过对GIS中线形颗粒起举电压影响因素的探索,进一步加深了线形颗粒运动行为的把握,为后续金属颗粒危害性的研究提供重要的参考
[Abstract]:In order to study the effect of particle size, quantity and shell vibration on the lifting voltage of particles, an experimental chamber with a reduced ratio of 126kV gas insulated switchgear GIs equipment has been prepared in the laboratory. The forces acting on linear particles in GIS are simulated and analyzed. The conventional pulse current signals, ultrasonic signals and particle trajectories under different conditions are recorded and observed. The results show that the lifting voltage of the grain is determined by the radius of the particle under the condition of the linear grain material under the running voltage of GIS, but it is independent of the length of the particle, and with the increase of the density of the linear particle material, the lifting voltage of the particle is determined by the radius of the particle. With the increase of the number of adjacent particles, the lifting voltage of the particles decreases. The vibration of the GIS cavity will make the particles get a certain initial velocity, and then the lifting voltage of the particles will decrease greatly. There are obvious differences in the discharge signals of metal particles in different moving states. The number of particles and the intensity of pulsation can be judged by using the ultrasonic amplitude of particles and the two-dimensional scatter plot of flight time. Through the exploration of the factors affecting the lifting voltage of linear particles in GIS, the motion behavior of linear particles is further grasped, which provides an important reference for the further study of the harmfulness of metal particles.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【分类号】：TM595

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