Multipoint temperature detection device for test of current-carrying capacity of cross-linked cables

Abstract

The invention relates to a multipoint temperature detection device for the test of current-carrying capacity of cross-linked cables, which comprises a on-site acquisition unit, a single conditioning unit, a data acquisition unit, a central processing unit and a direct-current power source unit from front to back of the flow direction of signals and data sequentially. The on-site acquisition unit is used for acquiring multipoint temperature data on sites, the signal conditioning unit is used for realizing high-frequency amplitude-modulation conversion of micro signals acquired by the on-site acquisition unit, the data acquisition unit is used for realizing secondary acquisition of data of the signal conditioning unit and then transmitting the acquired data to the central processing unit, and the direct-current power source unit provides direct-current power for meeting the requirement of normal running of the signal conditioning unit. The multipoint temperature detection device can monitor multipoint temperature on line quickly and accurately, and transmits data of the temperature to the next processing mechanism in a cross-link transmission manner, and is flexible in reflection and simple in structure. In addition, the number of temperature points can be increased according to test requirements within a preset range of the test, complicated process is simplified, and operation efficiency of the integral system is improved.

Description

technical field [0001] The invention relates to a temperature detection device for the ampacity test of a cross-linked cable, which belongs to the field of on-line monitoring, in particular to a temperature acquisition device for the on-line detection of the ampacity test. Background technique [0002] With the development of the national economy and the rapid growth of urban electricity demand, China has carried out urban network reconstruction and construction projects since 1991. Compared with oil-filled cables, XLPE cables have become the first choice for large-capacity electric energy transmission into the underground transmission system of urban load centers in large cities due to its less auxiliary equipment, convenient installation and maintenance, and less fire hazard under certain protection conditions. 110kV and 220kV XLPE cables gradually replace oil-filled cables for urban network reconstruction and construction projects. This brings good opportunities for the ...

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Problems solved by technology

[0010] The purpose of the present invention is: in order to solve the disadvantages that the number of temperature measurement points in the temperature measurement system of the current carrying capacity test online detection device cannot meet the test requirements, the temperature measurement system is huge, the breakdown loss is destructive, and the measurement accuracy and sensitivity are not high. The invention provides a method and device suitable for ampacity tests of various voltage levels

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