Temperature detection system in electric power facility
A technology of power facilities and detection systems, applied in non-electrical signal transmission systems, thermometers, thermometers with physical/chemical changes, etc., can solve problems such as inability to adapt to distributed measurement, temperature sensors cannot work normally, and achieve anti-electromagnetic interference Strong ability, excellent electrical insulation, good corrosion resistance
Inactive Publication Date: 2016-11-23
NANJING INST OF RAILWAY TECH
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Problems solved by technology
[0003] Traditional temperature sensors such as thermocouples, platinum resistors, and copper resistors are widely used due to their simple structure and low cost. Work
In addition, the single-point measurement method of this type of temperature sensor cannot meet the requirements of distributed measurement
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[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] as attached figure 1 As shown, a temperature detection system in a power facility of the present invention includes a controller, a semiconductor laser, a directional coupler, a distributed optical fiber temperature sensor, a photoelectric detector and an A / D converter, and the controller controls the semiconductor laser to work and send pulses Optical power, the directional coupler couples the pulsed optical power to the distributed optical fiber temperature sensor and receives the backscattered light caused by the distributed optical fiber temperature sensor, the distributed optical fiber temperature sensor is set in the temperature field to be measured, and the photodetector receives the The backscattered light of the coupler is converted into a photoelectric signal, and the A / D converter receives and converts the signal fro...
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Abstract
The invention discloses a temperature detection system in an electric power facility, which includes a controller, a semiconductor laser, a directional coupler, a distributed optical fiber temperature sensor, a photoelectric detector and an A / D converter. The controller controls the semiconductor laser to emit pulse optical power. The directional coupler couples the pulse optical power to the distributed optical fiber temperature sensor and receives backscattered light caused by the distributed optical fiber temperature sensor. The distributed optical fiber temperature sensor is arranged in a temperature field to be measured. The photoelectric detector receives the backscattered light and performs photoelectric signal conversion on the backscattered light. The A / D converter receives and converts a signal from the photoelectric detector, and transmits a converted signal to the controller for processing. The distributed optical fiber temperature sensor is used to measure and monitor spatial distribution along an optical fiber transmission path and information varied along with the time, and the monitoring with long distance, large scope, and high density can be realized.
Description
technical field [0001] The invention relates to a temperature detection system, in particular to a temperature detection system applied in power facilities such as high-voltage power transmission, power distribution cables, power cables, and high-voltage transformer cabinets. Background technique [0002] It is necessary to set up a temperature detection system in power facilities such as high-voltage transmission, distribution cables, power cables (especially at the junction) and high-voltage transformer cabinets. By detecting the temperature, the operating status of the power supply equipment can be known in time, and possible faults can be detected. Timely processing to ensure the safe operation of power supply equipment. [0003] Traditional temperature sensors such as thermocouples, platinum resistors, and copper resistors are widely used due to their simple structure and low cost. Work. In addition, the single-point measurement method of this type of temperature sens...
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IPC IPC(8): G01K11/32G08C23/06
CPCG08C23/06G01K11/32G01K11/324
Inventor 王邠许鹤李静陈文震王祥祥
Owner NANJING INST OF RAILWAY TECH