CN203786184U - 一种采用逆压电效应的光纤电压互感器 - Google Patents
一种采用逆压电效应的光纤电压互感器 Download PDFInfo
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- CN203786184U CN203786184U CN201420165990.XU CN201420165990U CN203786184U CN 203786184 U CN203786184 U CN 203786184U CN 201420165990 U CN201420165990 U CN 201420165990U CN 203786184 U CN203786184 U CN 203786184U
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- 229910052904 quartz Inorganic materials 0.000 claims abstract description 29
- 239000010453 quartz Substances 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials 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Abstract
本实用新型涉及一种采用逆压电效应的光纤电压互感器，包括高压电极、低压电极、石英晶体、金属电极、传感光纤和环氧绝缘管；金属电极的数量比石英晶体多1个，石英晶体的数量为3个，金属电极和石英晶体竖直间隔连接组成传感器，传感器外套有环氧绝缘管，环氧绝缘管上端和下端分别设有高压电极和低压电极，高压电极连接传感器上端的金属电极，低压电极连接传感器下端的金属电极，低压电极另一端接地；传感光纤依次缠绕于3个石英晶体上；传感光纤的一端通过单模保偏光纤连接有低相干多模激光二极管，传感光纤的另一端连接有信号采集电路。本实用新型具有较强的抗电磁干扰能力，能够利用现代数字信号处理系统处理输出信号的优点。
Description
一种采用逆压电效应的光纤电压互感器
技术领域
[0001 ] 本实用新型涉及一种光纤电压传感器，尤其是涉及一种采用逆压电效应的光纤电压互感器，属于电力设备技术领域。
背景技术
[0002] 电压互感器是一个带铁心的变压器。它主要由一、二次线圈、铁心和绝缘组成。当在一次绕组上施加一个电压Ul时,在铁心中就产生一个磁通Φ，根据电磁感应定律，则在二次绕组中就产生一个二次电压U2。改变一次或二次绕组的匝数，可以产生不同的一次电压与二次电压比，这就可组成不同比的电压互感器。电压互感器将高电压按比例转换成低电压，即100V，电压互感器一次侧接在一次系统，二次侧接测量仪表、继电保护等；主要是电磁式的(电容式电压互感器应用广泛)，另有非电磁式的，如电子式、光电式。
[0003]目前，在现有技术中，在使用此类型的电压互感器测量电力系统中的高电压时，由于它们采用电磁感应原理，有铁芯和线圈，易受电磁干扰，且有铁磁共振出现，随着电力系统容量的增大，电压的升高，其体积、重量越来越大，且绝缘性不好。
[0004] 如电压互感器等的电力设备工作时，各部件正常发热不应超过其最高允许温度，才能保证安全运行，因此温度也是衡量电力设备运行状态的重要参数之一。目前应用的各种温度测量装置存在着很多不足，如:感温元件耐热不够，没有考虑短路时的高温影响；没有考虑短路时大电压冲击对产品的影响；没有考虑其安装后对电力设备绝缘耐压的影响；特别是没有智能化功能等。
实用新型内容
[0005] 本实用新型所要解决的技术问题是，克服现有技术的缺点，提供一种采用逆压电效应的光纤电压互感器，该光纤电压互感器具有较强的抗电磁干扰能力，能够利用现代数字信号处理系统处理输出信号的优点。
[0006] 为了解决以上技术问题，本实用新型提供一种采用逆压电效应的光纤电压互感器，包括高压电极、低压电极、石英晶体、金属电极、传感光纤和环氧绝缘管；
[0007] 金属电极的数量比石英晶体多I个，石英晶体的数量为3个，金属电极和石英晶体竖直间隔连接组成传感器，传感器外侧套有环氧绝缘管，环氧绝缘管上端和下端分别设有高压电极和低压电极，高压电极连接传感器上端的金属电极，低压电极连接传感器下端的金属电极，低压电极另一端接地；
[0008] 传感光纤依次缠绕于3个石英晶体上；传感光纤的一端通过单模保偏光纤连接有低相干多模激光二极管，传感光纤的另一端通过单模保偏光纤连接有接收光纤，接收光纤缠绕于一压电陶瓷上，并通过压电相位调制器输出信号至相位跟踪器，相位跟踪器的输出端连接控制器的输入端，控制器的输出端分为2路，一路反馈至压电相位调制器，另一路为光纤电压互感器的信号输出端。
[0009] 本实用新型进一步限定的技术方案是:前述石英晶体的数量为3个。[0010] 前述传感器表面设有聚氨基甲酸酯涂层，用以提高传感器表面的耐磨性。
[0011 ] 前述传感器上端的金属电极上还嵌有温度传感器，温度传感器通过温度控制器与温度报警器相连，可以实时监测传感器温度，防止在过高温度下连续工作。
[0012] 进一步的，前述石英晶体为圆柱状，石英晶体的尺寸为:长度100mm，直径30mm。
[0013] 前述环氧绝缘管的内径为80mm，外径为92mm，环氧绝缘管外壁由上至下均匀分布有伞群。
[0014] 前述传感光纤和接收光纤为椭圆芯双模光纤，传感光纤、接收光纤以及单模保偏光纤的连接处截面相互错开30°，以使双模光纤中激发等量的一阶模式和二阶模式。
[0015] 本实用新型的有益效果是:
[0016] 本实用新型具有较强的抗电磁干扰能力，并具备高度绝缘性能，测量频率很宽，能够利用现代数字信号处理系统处理输出信号的优点，并且尺寸线、重量轻、能被集成到电力设备中。本实用新型的环氧绝缘管中不充任何物质，没有易燃易爆的安全隐患，并且有利于环保，节约成本。本实用新型采用石英晶体作为传感材料，具有高阻抗、低介质常数、对电场失真影响小、压电系数等对温度的依赖小，因此具有良好的稳定性。本实用新型采用的环氧绝缘管不仅能提高互感器的绝缘强度，并能起到机械保护的作用。
附图说明
[0017] 图1为本实用新型整体结构示意图。
[0018] 图2为本实用新型传感器的电路连接示意图。
[0019] 附图标记:1-高压电极、2-温度传感器、3-金属电极、4-石英晶体、5-传感器、6-传感光纤、7-环氧绝缘管、8-伞群、9-低压电极、10-信号输出端、11-控制器、12-相位跟踪器、13-压电陶瓷、14-接收光纤、15-低相干多模激光二极管。
具体实施方式
[0020] 实施例1
[0021] 本实施例提供的一种采用逆压电效应的光纤电压互感器，结构如图1-2所示，包括高压电极1、低压电极9、石英晶体4、金属电极3、传感光纤6和环氧绝缘管7 ；
[0022] 金属电极3的数量比石英晶体4多I个，石英晶体4的数量为3个，金属电极3和石英晶体4竖直间隔连接组成传感器5，传感器5表面设有聚氨基甲酸酯涂层。
[0023] 传感器5外侧套有环氧绝缘管7，环氧绝缘管7外壁由上至下均匀分布有伞群8。环氧绝缘管7上端和下端分别设有高压电极I和低压电极9，高压电极I连接传感器5上端的金属电极3，低压电极9连接传感器5下端的金属电极3，低压电极9另一端接地；
[0024] 传感光纤6依次缠绕于3个石英晶体4上；传感光纤6的一端通过单模保偏光纤连接有低相干多模激光二极管15，其中低相干多模激光二极管15为光源。传感光纤6的另一端通过单模保偏光纤连接有接收光纤14，传感光纤和接收光纤为椭圆芯双模光纤，传感光纤、接收光纤以及单模保偏光纤的连接处截面相互错开30°。
[0025] 接收光纤14缠绕于一压电陶瓷13上，并通过压电相位调制器输出信号至相位跟踪器12，相位跟踪器12的输出端连接控制器11的输入端，控制器11的输出端分为2路，一路反馈至压电相位调制器，另一路为光纤电压互感器的信号输出端。相位跟踪器12通过接受接收光纤14的相位差并输入至控制器11产生反馈控制电压，反馈控制电压作用于压电相位调制器，该反馈控制电压即为输出信号。其中压电相位调制器的型号为LN27S，为Covega, Thorlabs Quantum Electronic 生产的 40Gb/s 调制器。
[0026] 传感器5上端的金属电极3上还嵌有温度传感器2，温度传感器2通过温度控制器与温度报警器相连。利用温度传感器2对传感器5的温度进行实时检测，当检测到传感器5的温度高于温度控制器内的正常工作温度设定值时，温度报警器会发出警报提醒。
[0027] 本实施例中，石英晶体为圆柱状，石英晶体的尺寸为:长度100mm，直径30mm。环氧绝缘管的内径为80mm,外径为92mm。
[0028] 除上述实施例外，本实用新型还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案，均落在本实用新型要求的保护范围。
Claims (7)
1.一种采用逆压电效应的光纤电压互感器，包括高压电极、低压电极、石英晶体、金属电极、传感光纤和环氧绝缘管；其特征在于: 所述金属电极的数量比石英晶体多I个，所述金属电极和石英晶体竖直间隔连接组成传感器，所述传感器外侧套有所述环氧绝缘管，所述环氧绝缘管上端和下端分别设有所述高压电极和低压电极，所述高压电极连接所述传感器上端的金属电极，所述低压电极连接所述传感器下端的金属电极，所述低压电极另一端接地； 所述传感光纤依次缠绕于所述石英晶体上；所述传感光纤的一端通过单模保偏光纤连接有低相干多模激光二极管，所述传感光纤的另一端通过单模保偏光纤连接有接收光纤，所述接收光纤缠绕于一压电陶瓷上，并通过压电相位调制器输出信号至相位跟踪器，所述相位跟踪器的输出端连接控制器的输入端，所述控制器的输出端分为2路，一路反馈至所述压电相位调制器，另一路为光纤电压互感器的信号输出端。
2.根据权利要求1中所述的采用逆压电效应的光纤电压互感器，其特征在于:所述石英晶体的数量为3个。
3.根据权利要求1中所述的采用逆压电效应的光纤电压互感器，其特征在于:所述传感器表面设有聚氨基甲酸酯涂层。
4.据权利要求1中所述的采用逆压电效应的光纤电压互感器，其特征在于:所述传感器上端的金属电极上还嵌有温度传感器，所述温度传感器通过温度控制器与温度报警器相连。
5.据权利要求1中所述的采用逆压电效应的光纤电压互感器，其特征在于:所述石英晶体为圆柱状，所述石英晶体的尺寸为:长度IOOmm,直径30mm。
6.据权利要求1中所述的采用逆压电效应的光纤电压互感器，其特征在于:所述环氧绝缘管的内径为80mm,外径为92mm,所述环氧绝缘管外壁由上至下均匀分布有伞群。
7.据权利要求1中所述的采用逆压电效应的光纤电压互感器，其特征在于:所述传感光纤和所述接收光纤为椭圆芯双模光纤，所述传感光纤、接收光纤以及所述单模保偏光纤的连接处截面相互错开30°。
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