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Novel optical fiber temperature measuring system for electric power system

An optical fiber temperature measurement and power system technology, which is applied in the directions of thermometers, thermometers, and measuring devices with physical/chemical changes. The effect of low, reduced requirements

Active Publication Date: 2017-05-10
苏州工业园区韵光电子科技有限公司
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  • Application Information

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Problems solved by technology

The reason why the optical fiber-based temperature measurement system is bulky and costly is that it consists of three bulky and expensive core optical modules: broadband flat light source module, etalon module with calibration function, scanning Optical wavelength tunable optical filter module

Method used

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  • Novel optical fiber temperature measuring system for electric power system
  • Novel optical fiber temperature measuring system for electric power system
  • Novel optical fiber temperature measuring system for electric power system

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Such as Figure 1-Figure 8 As shown, a new type of optical fiber temperature measurement system applied to power systems, including a light source module and a coupler connected by a single-mode optical fiber, the coupler is also connected with a tunable optical filter module, an etalon module and a sensor Probe, the light source module does not need the characteristic of flat spectrum that is necessary for the usual optical fiber temperature measurement system, and the light with uneven spectrum needs to pass through a light with high light rejection ratio (the peak and valley in the transmission spectrum of the adjustable optical filter) The difference is called the optical rejection ratio) characteristic of the adjustable optical filter, the optical rejection ratio of the adjustable optical filter module is 45dB-60dB, which is 5 to 15dB larger than the adjust...

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Abstract

The present invention discloses a novel optical fiber temperature measuring system for an electric power system. The novel optical fiber temperature measuring system comprises a light source module and a coupler which are connected with each other by a single-mode optical fiber; the coupler is connected with a tunable filter module, an etalon module and a sensor probe; the light source module does not need a spectral flatness characteristic which is necessary for a conventional optical fiber temperature measuring system; the light suppression ratio of the tunable filter module is 45 dB-60 dB, and therefore, a light spectrum corresponding to a tested probe can be selected from uneven spectra, crosstalk imposed to a low-power spectral region by a high-power spectral region caused by non-flat spectra can be decreased; and the output end of the light source module is also connected with a logarithmic amplifier module, and therefore, the influence of the non-flat spectra can be further decreased.

Description

technical field [0001] The invention relates to a novel optical fiber temperature measuring system applied to an electric power system, and belongs to the technical field of optical fiber temperature sensing in the electric power system. Background technique [0002] The power system has a huge demand for temperature and stress sensing, which is the most demanding sensor besides current and voltage. These applications include temperature monitoring of switch heads inside switchgear, temperature monitoring of windings inside transformers, and high-voltage or high-current cable joints. temperature monitoring etc. Three types of high, medium and low voltage power equipment plus cable joints, the annual market demand for temperature measurement systems is nearly 10 million sets. [0003] In the field of power systems, in addition to temperature measurement systems based on light, there are also temperature measurement systems based on electrical platforms. Electrically-based s...

Claims

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Application Information

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IPC IPC(8): G01K11/32G01K11/3206
CPCG01K11/3206
Inventor 韩迺骞
Owner 苏州工业园区韵光电子科技有限公司
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