公开(公告)号：WO2010119095A1

公开(公告)日：2010-10-21

申请号：PCT/EP2010/054960

申请日：2010-04-15

Applicant: SINTEF ,  BJERKAN, Leif ,  GANGOPADHYAY, Tarun, Kumar ,  DASGUPTA, Kamal ,  BANDYOPADHYAY, Somnath ,  BISWAS, Palas ,  BHADRA, Shyamal ,  MAITI, H. S.

Inventor： BJERKAN, Leif ,  GANGOPADHYAY, Tarun, Kumar ,  DASGUPTA, Kamal ,  BANDYOPADHYAY, Somnath ,  BISWAS, Palas ,  BHADRA, Shyamal ,  MAITI, H. S.

IPC: H01B9/00 ,  H02G7/00

CPC classification number: H01B9/005 ,  H02G7/00

Abstract: The invention relates to a system and a probe unit for monitoring on-line temperature of high voltage cables in air stretches, comprising of at least one optical fibre attached to the cable, and said optical fibre comprising of at least one Bragg grating (FBG) with known reflection characteristics, a light source for transmitting light within a known range of wavelengths into said optical fibre, and measuring devices for detection of light reflected from said Bragg grating(s) in the fibre and for recognizing light reflected from each Bragg grating based on their known reflection characteristics and their unique correspondence with temperature of the Bragg grating. The Bragg grating is mounted in a probe, the probe being mounted in and thermally coupled to a housing being mounted on and thermally coupled to the cable, wherein the probe has a cylindrical shape and is mounted in the housing in an opening having essentially the same cross section as the probe but a length exceeding the length of the probe, so as to allow for mutual variations in the temperatures between the probe and housing without subjecting the Bragg grating to strain.

Abstract translation: 本发明涉及一种用于监测空气延伸中的高压电缆的在线温度的系统和探针单元，包括至少一根连接到电缆的光纤，并且所述光纤包括至少一个布拉格光栅（FBG） 具有已知的反射特性，用于将已知波长范围内的光透射到所述光纤中的光源，以及用于检测从光纤中的所述布拉格光栅反射的光并用于识别从每个布拉格光栅反射的光的测量装置 关于它们已知的反射特性及其与布拉格光栅温度的独特对应关系。 布拉格光栅安装在探头中，探头安装在壳体上并热耦合到壳体上，该壳体安装在电缆上并热耦合到电缆上，其中探针具有圆柱形形状并且安装在壳体中具有基本相同的开口 横截面作为探头，但长度超过探头的长度，以便允许探针和壳体之间的温度相互变化，而不会使布拉格光栅变形。