光电集成强电场传感器的频率特性校准研究  

Frequency Characteristics Calibration of Optical Electric Integrated Sensor for Intensive Electric Field

作　　者：牛犇[1] 曾嵘[1] 耿屹楠[1] 李欢[1] 

机构地区：[1]清华大学电力系统及大型发电设备安全控制与仿真国家重点试验室,北京100084

出　　处：《高电压技术》2009年第8期1975-1979,共5页High Voltage Engineering

基　　金：国家自然科学基金(50777035);国家"十一五"科技支撑计划(2006BAA02A19)~~

摘　　要：为了将光电集成电场传感器用于时域电场测量,为高电压技术领域的研究工作提供一种有效的实验手段,需要校准传感器的频率特性,常用的实验手段无法满足上述校准需求,故结合高电压工程领域电场传感器校准的基本要求和光电集成电场传感器的特点,分析并确定了传感器时域校准的方案,利用有界波电磁脉冲模拟器开展校准工作,通过实验与计算获得了传感器的上升时间和上限截止频率等,为传感器的测量应用打下了基础。Optical electric integrated electric field sensor （OEFS） has the advantages of small scale, large frequency range, high electric field measurement capability, and et al. It＇s an effective experimental method for the research of high voltage technology. The frequency characteristics of OEFS have to be calibrated before using OEFS in the measurement of time domain waveform of electric field. Normal calibration method can not satisfy the requirement of this kind of electric field sensor, because OEFS is used to measure intensive electric field and has not enough sensitivity to response the low strength electric field from the normal calibration device. The demand of the calibration for the electric field sensor used in high voltage technology was analyzed in this paper, and so was the calibration demand of the OEFS. Frequency characteristics calibration scheme was researched. Different calibration types, frequency domain calibration and time domain calibration, were compared and latter was used in this paper. The three kinds of calibration methods recommended by tEEE standard were introduced, and the method using calculated field strength was chosen. Nuclear electromagnetic pulse was used as calibration waveform and parallel strip transmission line was used as calibration device. Frequency characteristics calibration experiment was carried out in a bounded electromagnetic pulse simulator, and time domain waveforms from the voltage divider and the OEFS were compared. In can be concluded from the experiment results that the rise time of OEFS is less than 1.12 ns, and the 3 dB upper limit frequency is higher than 313 MHz. OEFS can be used in measurements of the high frequency signals, such as the radiation electric field of VFTO, in high voltage technology.

关 键 词：电场传感器 校准 光电集成 频率特性 上升时间 上限截止频率 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]