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Bragg fiber grating temperature sensor, temperature monitoring system and monitoring method of temperature monitoring system

A technology of temperature sensor and fiber grating, which is applied in the field of temperature monitoring of thyristor of high-voltage power transmission converter valve, can solve the problems of complex temperature field distribution in the shell and difficult to derive accurately, and achieves convenient and fast installation, small error and good linearity. Effect

Inactive Publication Date: 2016-11-09
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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Problems solved by technology

Due to the existence of the heat dissipation mechanism, the temperature field distribution in the shell is extremely complicated, and it is difficult to accurately derive

Method used

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  • Bragg fiber grating temperature sensor, temperature monitoring system and monitoring method of temperature monitoring system
  • Bragg fiber grating temperature sensor, temperature monitoring system and monitoring method of temperature monitoring system
  • Bragg fiber grating temperature sensor, temperature monitoring system and monitoring method of temperature monitoring system

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Embodiment Construction

[0045] 1. Bragg fiber grating temperature sensor 4 design

[0046] figure 2 Design drawing for Bragg FBG temperature sensor 4. Such as figure 2 As shown, a Bragg fiber Bragg grating temperature sensor 4 includes: a high-voltage insulating sheath tube 7, an optical fiber connector 8, a packaged metal casing 9, a photosensitive optical fiber 10, and a Bragg fiber Bragg grating 11;

[0047] The photosensitive optical fiber 10 is divided into front and rear two parts, the high voltage resistant insulating sheath tube 7 is arranged outside the front part of the photosensitive optical fiber 10, and the end of this part of the photosensitive optical fiber 10 is connected to the optical fiber connector 8, and the Bragg optical fiber The grating 11 is arranged at the end of the photosensitive optical fiber 10 at the rear, and the encapsulating metal casing 9 is arranged outside the end of the high-voltage insulating sheath tube 7 facing the Bragg fiber grating 11 .

[0048] Bare f...

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Abstract

The invention discloses a Bragg fiber grating temperature sensor, a temperature monitoring system and a monitoring method of the temperature monitoring system, wherein the Bragg fiber grating temperature sensor, the temperature monitoring system and the monitoring method of the temperature monitoring system belong to the field of high-voltage power transmission converter valve thyristor temperature monitoring. The Bragg fiber grating temperature sensor comprises a high-voltage-resistant insulating protecting sleeve, a fiber connector, a packaging metal housing, a photosensitive fiber and a Bragg fiber grating. The photosensitive fiber is divided into a front part and a back part. The high-voltage-resistant insulating protecting sleeve is arranged outside the front part of photosensitive fiber. Furthermore the end of the front part of the photosensitive fiber is connected with the fiber connector. The Bragg fiber grating is arranged at the end of the back part of the photosensitive fiber. The packaging metal housing is arranged outside one end, which faces the Bragg fiber grating, of the high-voltage-resistant insulating protecting sleeve. A temperature condition in the thyristor housing can be monitored and reflected in real time. The Bragg fiber grating temperature sensor, the temperature monitoring system and the monitoring method of the temperature monitoring system have advantages of small size, small error, high insulating performance, high reliability, high linearity, convenient and quick mounting, etc.

Description

technical field [0001] The invention relates to the field of temperature monitoring of a thyristor of a high-voltage power transmission converter valve, in particular to a Bragg fiber grating temperature sensor, a temperature monitoring system and a method. Background technique [0002] High-voltage direct current transmission technology is widely used in long-distance high-power transmission. The converter station is a power engineering facility that realizes AC-DC power conversion in the high-voltage direct current transmission system. The thyristor of the high-voltage converter valve is the core component of the system, and it generates heat during use. The gap is small, and the hot spot position has a large temperature gradient due to the heat dissipation design, which makes it extremely difficult to measure the temperature inside the thyristor shell of the converter valve. [0003] In the actual operation process, when it is subjected to a fault (surge) current, a high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K11/3206
CPCG01K11/3206
Inventor 廖招龙茅昕何幼林夏涛刘彤庆水彪
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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