Cable conductor temperature measuring device and method

A temperature measurement and cable conductor technology, applied in the field of temperature measurement equipment, can solve problems such as inability to meet measurement requirements, inaccurate measurement, and large changes

Active Publication Date: 2015-03-25
SHANGHAI ELECTRIC CABLE RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature difference between the skin of the insulating sheath 2 and the cable conductor 1 is not a fixed difference, and in practical applications, the surface temperature of the insulating sheath 2 is affected by the ambient temperature, which changes greatly, and the ambient temperature is A randomly changing temperature field, so only by measur...

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  • Cable conductor temperature measuring device and method
  • Cable conductor temperature measuring device and method
  • Cable conductor temperature measuring device and method

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Embodiment Construction

[0026] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0027] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper"...

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Abstract

The invention provides a cable conductor temperature measuring device. The cable conductor temperature measuring device includes a thermal resistance part in which the outer surface of a cable is wrapped. An inner-layer temperature sensor making contact with the outer surface of the cable is arranged on the inner surface of the thermal resistance part. An outer-layer temperature sensor is arranged on the outer surface of the thermal resistance part. The inner-layer temperature sensor and the outer-layer temperature sensor are located on the same radial straight line of the cable. In the cable conductor temperature measuring device, cable conductors generate heat, dissipate heat towards the outer side through an insulating sheath and tend to a thermal balance state; corresponding temperature gradients are formed in the thermal resistance part and the insulating sheath according to distribution of thermal resistance, afterwards, a temperature gradient value of the thermal resistance part is obtained through a measured value of the inner-layer temperature sensor and a measured value of the outer-layer temperature sensor, and the temperature of the cable conductors is figured out through a cable thermal balance mathematical model; accordingly, the measuring accuracy of the temperature of the cable is improved, and safe operation of the cable is guaranteed.

Description

technical field [0001] The invention relates to a temperature measuring device, in particular to a cable conductor temperature measuring device and a measuring method thereof. Background technique [0002] The power transmission of high-voltage cables is the lifeblood of ensuring the national economic life. How to make the best use of high-voltage cables to transmit current and electricity on the basis of ensuring the safe operation of cables, and the optimal current transmission scheme are the current focus of the power management department. The actual load capacity of the cable is mainly reflected by the temperature of the cable conductor. As long as the temperature of the cable conductor does not exceed the rated temperature, the load of the cable is within the safe load range. At present, the effective way to solve the monitoring of cable ampacity is to monitor the temperature of the cable conductor online. [0003] The high-voltage cable includes a cable conductor 1 a...

Claims

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Application Information

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IPC IPC(8): G01K7/02
Inventor 丁薇霞涂建坤曹春耕
Owner SHANGHAI ELECTRIC CABLE RES INST
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