The results show that in SF6 there is obvious difference between the positive and negative onset voltage and the difference is increased by an increase of gas pressure.
在较大分子的气体(如SF_6)中,正、负电晕起始电压有明显差别,而且随着气体压强增加而增大。
In the paper,it has proved that the onset voltage of positive corona higher than that of negative corona using needle-to-plane electrodes simulation device,and this phenomenon is analyzed according to the metal-structure theory,band theory,Townsend discharge mechanism and space charge theory.
本文利用针-板电极模拟装置,通过实验证实正电晕的起始电压要高于负电晕的起始电压,并从金属结构和能带理论、汤生德放电机制以及空间电荷理论的角度对这一现象进行了剖析。
It is found that the initial voltage of PMMA is higher than that of AC,and lower than that of DC;with the frequency increasing,the initial voltage of PMMA has a descending trend;with the voltage increasing,the initial rate of PMMA is decreased.
实验表明不同频率ns脉冲下有机玻璃中电树枝引发的起始电压高于交流,低于直流,频率升高,电树枝起始电压有下降趋势;不同时刻有机玻璃的电树枝引发率,基本上随着电压等级的上升而下降;电子轰击、空间电荷分布和电机械应力对绝缘材料的电树枝引发具有关键作用,而在高频的脉冲强场下电机械应力起主要作用。
partial discharge inception voltage test
局部放电起始电压试验
Influence of Humidity on Conductor Corona Onset Voltage
空气湿度对导线电晕起始电压的影响
Test & Study about Influence of Air Relative Humidity on Corona Initial Voltage of Coils for High Voltage Electrical Machine
空气相对湿度对高压电机线圈电晕起始电压影响的试验研究
insulating liquids-Determination of the partial discharge inception voltage (PDIV)-Test procedure
GB/T17648-1998绝缘液体局部放电起始电压测定试验程序
Measurements and Analysis of Corona Onset Voltage of HVDC Test Line and Ion Current Density at Ground Level
高压直流输电试验线路的电晕起始电压及地面离子流的测量与分析
The Method for Measuring Initial Corona of Super High Voltage Transmission Line
超高压输电导线起始电晕电压测量方法的探讨
Calculation of Preliminary Winding Parameters of Several Rectifier Transformers and Furnace Transformers;
几种整流变压器和电炉变压器绕组起始参数计算
Numerical Simulation of Leader Inception on the Surface of UHV Bundle Conductors Under Lightning Background
雷电背景下特高压分裂导线表面先导起始的数值仿真
Studies on Overvoltage During Full-Voltage Starting in HVDC Transmission System
高压直流输电系统全电压起动过电压的研究
Code for initial pressure testing of collapsible soils
湿陷性土起始压力测试规程
The Eexplore to Pressure Loss due to Hydraulic Pressure Pipeline Laminar Entrance Length;
液压管道中层流起始段对压力损失的探讨
electro-hydraulic deck crane
电动液压甲板起重机
Teaching discussion about calculating the initial value of current and voltage in the linear dynamic circuit;
线性动态电路电流电压初始值计算的教学研究
A progressive approximation method for initial states of high voltage transmission lines
高压输电线原始构型的渐进逼近方法
Study of Generator Self-excitation Caused by Capacitive Currents of Long Distance UHV Transmission Lines
特高压输电线引起发电机自励磁过电压的研究
The phone began ringing around 2 A. M.
大约凌晨２点, 电话铃声开始响起来。
The cross-town cars began to be crowded.
横穿市区的电车开始拥挤起来。
Cable modems are just beginning to emerge.
有线电视Modem刚刚开始兴起。