Cable conductor temperature measurement system based on acoustic surface wave temperature sensor and algorithm thereof

A technology of temperature sensor and surface acoustic wave, which is applied in the field of cable conductor temperature measurement system based on surface acoustic wave temperature sensor, can solve the inconvenient on-site inspection and other problems, achieve the effect of improving convenience and accuracy, and realizing real-time monitoring

Inactive Publication Date: 2016-06-22
CHINA ELECTRIC POWER RES INST +3
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  • Abstract
  • Description
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Problems solved by technology

For the temperature monitoring of cable joints in operation, sensing technologies such as active sensors ...

Method used

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  • Cable conductor temperature measurement system based on acoustic surface wave temperature sensor and algorithm thereof
  • Cable conductor temperature measurement system based on acoustic surface wave temperature sensor and algorithm thereof
  • Cable conductor temperature measurement system based on acoustic surface wave temperature sensor and algorithm thereof

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Embodiment Construction

[0025] The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0026] like figure 1 As shown, the surface acoustic wave temperature sensor includes an interdigital transducer (IDT) and a reflection grid arranged at both ends of the piezoelectric substrate. When an alternating voltage is applied to both ends of the interdigital transducer, the interdigital transducer The surface of the piezoelectric substrate under the device and the space near the surface generate an alternating electric field, and generate corresponding elastic deformation on the surface of the piezoelectric substrate through the inverse piezoelectric effect, thereby exciting the surface acoustic wave. Wave propagation properties, especially the influence of surface acoustic wave propagation velocity, can obtain data related to the temperature of the measured object.

[0027] like figure 2 As shown, in the data transmission system used in the present invention, th...

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Abstract

The invention belongs to the technical field of cable temperature measurement, and particularly relates to a cable conductor temperature measurement system based on an acoustic surface wave temperature sensor and an algorithm thereof. The measurement system comprises the acoustic surface wave temperature sensor, a data transmission system and a cable temperature monitoring system. The acoustic surface wave temperature sensor is configured on the surface of a cable joint and the surface of a cable body. Acquired data are transmitted to a cable temperature monitoring system through the data transmission system. Furthermore according to the measured surface temperature of the cable and a theoretical calculation method for cable current-carrying capacity, conductor temperature is calculated through the surface temperature and a cable structure parameter, thereby realizing real-time monitoring on the temperature of a cable conductor. The cable conductor temperature measurement system settles a problem of relatively high difference between the conductor temperature at the cable joint and the conductor temperature at the body caused by complicated structure at the middle joint of the cable and adverse environment, thereby realizing temperature measurement on the cable joint conductor, and greatly improving convenience and accuracy in conductor temperature measurement.

Description

technical field [0001] The invention belongs to the technical field of cable temperature measurement, in particular to a cable conductor temperature measurement system and algorithm based on a surface acoustic wave temperature sensor. Background technique [0002] In the cable line, the operating environment of the cable joint is usually the worst. First of all, the complex structure of the cable joint will lead to poor heat dissipation conditions at the joint; secondly, in order to prevent the cable joint from being burned and causing a large-scale accident, the general cable joint is run in an explosion-proof box, which will also affect the heat dissipation of the joint. Therefore, in order to judge the insulation aging condition, local hot spots, and timely discover potential safety hazards, and to provide a basis for dynamic capacity increase of power cables, the temperature of cable joints is monitored to ensure the reliability, stability, and economy of power system op...

Claims

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Application Information

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IPC IPC(8): G01K11/26
CPCG01K11/265
Inventor 吴立远毕建刚马国明吴震杨圆郑晴常文治杜月
Owner CHINA ELECTRIC POWER RES INST
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