| 基于标准具的XLPE电缆接头光栅测温系统 |
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| 引用本文： | 刘安文,王伟. 基于标准具的XLPE电缆接头光栅测温系统[J]. 现代电力, 2012, 29(3): 46-50 |
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| 作者姓名： | 刘安文 王伟 |
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| 作者单位： | 1. 绍兴电力局,浙江绍兴,312000
2. 华北电力大学新能源电力系统国家重点实验室,北京,102206 |
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| 摘 要： | 采用光纤光栅(FBG)测量电缆温度已逐步成为在线监测XLPE电缆绝缘状态的重要手段。文中介绍了采用F-P滤波器解调光纤光栅测量结果的原理,并通过实验指出了该方法的固有缺陷。为克服该缺陷,提高测量精度,本文采用F-P标准具标定波长漂移量,完全避免了滤波器选通波长和调谐电压之间的非线性关系造成的影响,大大提高了光纤光栅的测量精度。经过在实验室三相110kV XLPE电缆接头进行测量可知,采用该方法后系统测量误差控制在±0.4℃以内,具有良好的工程实用性。
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| 关 键 词： | XLPE 标准具 温度 光纤光栅 F-P滤波器 |
The FBG Temperature Measurement System for XLPE Cable Connector Based on Etalon |
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| LIU Anwen , WANG Wei. The FBG Temperature Measurement System for XLPE Cable Connector Based on Etalon[J]. Modern Electric Power, 2012, 29(3): 46-50 |
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| Authors: | LIU Anwen WANG Wei |
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| Affiliation: | 1.Shaoxing Electric Power Bureau,Shaoxing 312000,China;2.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China) |
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| Abstract: | At present,using FBG to measure the temperature of cable is becoming an important means of on-line monitoring and evaluating the insulation of XLPE cable.In this paper,the principle of demodulating measurement results of FBG by F-P filter is introduced,and the inherent defects of this method is pointed out by experiment.To overcome this defect and to improve the measurement accuracy,an F-P etalon is used to detect the drift of wavelength.The F-P etalon can completely avoid the impact of the nonlinear relationship between filtered wavelength and tuning voltage,which improves the accuracy of the fiber Bragg grating.A system with three-phase 110kV XLPE cable connector is measured in laboratory,and the measurement error can be controlled within ±0.4 ℃,which shows that the system has good engineering practicability. |
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| Keywords: | XLPE etalon temperature fiber Bragg grating(FBG) F-P filter |
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