Alstom全光纤电流互感器介绍

NXCT 全光纤电流互感器
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Technology
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阿海珐输配电 ITR 拥有丰富的技术资源支 持
RPV Italy RMM Mexico ITR+Capacitors Bushing RMW USA ITR RMG Brazil ITR+Coil
阿海珐输配电 AREVA T&D 互感器集团 ITR LINE
NxtPhase O/E ITR
ITR+Bushing+Capacitors+Air Core Coil
阿海珐输配电互感器（上海）有限公司
RMC China ITR+Bushing +Capacitor
RMK India RML Germany ITR
RMT Finland Nokian Capacitors
ITR+Coil+Bushing
Presentation title - 01/01/2010 - P 2
© ALSTOM 2010. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

电流互感器分类
电磁式电流互感器 （材料耗用大，绝缘复杂）
混合型光电互感器 (有源式光电互感器 ) 电 流 互 感 器 在高压侧采用Rogwski线圈, 将被测电流转换成电压信号 ，再将电压信号转换成光信号传输。高压侧电子装置电源 由锂电池供给，或底部送强光束，由光电池产生电源，也 有由高压电、磁场激励感应供电。 光 电 电 流 互 感 器 磁光玻璃光电互感器 采用法拉第磁光效应，根据光波行进中，在由一次电流形 成的磁场中引起的光偏转，由底部的电子装置检测原光信 号和偏转后的光信号差异，计算出一次电流值。头部无需 电源，但匝数受限，磁光玻璃尺寸受限，使测量灵敏度不 高。 全光纤光电互感器 全光纤代替了磁光玻璃，结构简单，采用高灵敏度不受干 扰的Sagnac干涉原理，可靠性好，灵敏度高，应用灵活 ，稳定性高。
Presentation title - 01/01/2010 - P 3
© ALSTOM 2010. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

有源光电互感器原理图
有源光电互感器原理图 混合型光钎电流互感器是利用电磁感应原理制作成传感头, 采用Rogwski线圈将 被测电流转换成电压信号, 再将电压信号转换成光信号, 通过光钎传输到控制室。 混合型光钎电流互感器的传感头侧都要有偏置电源, 给电子或光电元件供电。
Presentation title - 01/01/2010 - P 4
© ALSTOM 2010. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

磁光玻璃偏振光光电互感器原理图
无源型光电式电流互感器的传感头 不需要供电电源。传感头一般用法 拉第磁光效应原理制成，处于低电 位的光源发出的偏振光经光纤传到 高压侧，并通过处于被测电流产生 的磁场中。偏振光的偏振面在磁光 玻璃中发生旋转，即电流信号偏振 调制光波。带电流信号的光波经光 纤传到低电位侧，经光-电变换后放 大输出。 无源结构的优点是结构简单，且完 全不采用传统的电磁感应元件，无 饱和问题，充分发挥了光电式电流 互感器的特点，尤其是高压侧无源 电子器件，无温度稳定问题，互感 器运行寿命容易保证。其缺点是光 学器件制造难度大，测量的高精度 难以达到，且长期稳定性不高。
Presentation title - 01/01/2010 - P 5
© ALSTOM 2010. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.
磁光玻璃
磁光玻璃偏振光光电互感器原理图