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A measuring device for repairing effect of cable buffer layer based on capacitive current analysis

A technology of capacitance current and measuring device, applied in the field of high-voltage cables, can solve the problems of inability to evaluate the repair effect of the electrical performance defects of the buffer layer of the high-voltage cross-linked polyethylene cable, and achieve the effect of an accurate, reliable and easy-to-implement implementation method.

Active Publication Date: 2022-07-26
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +3
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, propose a cable buffer layer repair effect measurement device based on capacitive current analysis, and solve the current problem that the repair effect of the electrical performance defect of the high-voltage XLPE cable buffer layer cannot be effectively evaluated

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  • A measuring device for repairing effect of cable buffer layer based on capacitive current analysis
  • A measuring device for repairing effect of cable buffer layer based on capacitive current analysis
  • A measuring device for repairing effect of cable buffer layer based on capacitive current analysis

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] A cable buffer layer repair effect measurement device based on capacitive current analysis, such as figure 1 As shown, it is composed of a voltage regulator (1), a booster (2), a voltage divider (3), a voltage divider digital display meter (11), a current transformer (9) and a digital ammeter (10). The voltage regulator (1) is connected to the booster (2) for controlling the booster (2) to boost voltage, and the voltage divider (3) divides the high voltage generated by the booster (2) Then, it is applied to the XLPE cable conductor (4), and the voltage divider digital display meter (11) is connected to the voltage divider (3) to measure the output voltage of the voltage divider (3) and display the current voltage in real time. Voltage amplitude, when the voltage is stable, record the current voltage amplitude as U. The cross-linked polyethylene cable...

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Abstract

The invention relates to a cable buffer layer repairing effect measurement device based on capacitance current analysis. The voltage divider is used to control the voltage boost of the booster. The voltage divider divides the high voltage generated by the booster and applies it to the XLPE cable conductor. The voltage divider is connected with a digital display meter of the voltage divider. , The aluminum sheath of the cable outside the conductor of the XLPE cable is grounded through the ground wire, and a current transformer is worn on the ground wire and connected to the digital ammeter. The measurement results of the voltage divider digital display and digital ammeter are output to the measurement host , the measurement host judges the repair effect. The invention has reasonable design, can effectively evaluate the repair effect of the electrical performance defect of the buffer layer of the high-voltage cross-linked polyethylene cable, has the characteristics of accuracy, reliability, easy realization, etc., and is of great significance for guiding the repair work of the cable.

Description

technical field [0001] The invention belongs to the technical field of high-voltage cables, and relates to a high-voltage cable repairing device, in particular to a cable buffer layer repairing effect measurement device based on capacitive current analysis. Background technique [0002] With the rapid development of urbanization in my country, the proportion of urban electricity consumption is increasing, accounting for more than 80% of the total electricity consumption in the country. The ever-increasing demand for electricity and the increasingly tight urban land make more and more underground cable transmission methods are used for power transmission, and its proportion can reach more than 70%. [0003] Cross-linked polyethylene (XLPE) cables have become the mainstream choice for onshore urban power transmission projects because of their excellent electrical properties, heat resistance and ease of installation. At present, almost all newly built urban high-voltage cables ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G01R19/00G01R27/02H02G1/00H02G1/16
CPCG01R31/1272G01R19/0092G01R27/02H02G1/00H02G1/16
Inventor 宋鹏先朱晓辉杜伯学李进李奇孔晓晓方静傅兴李志坚李旭张弛朱明正于洋
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO
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