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Apparatus and method for evaluating underground electric power cables

A technology of power cables and current measuring devices, applied in the direction of adopting electrical devices, measuring devices, circuit devices, etc., can solve problems such as danger

Inactive Publication Date: 2005-10-05
LG CABLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the worst case, the transmission capacity calculated based on the sheath circulation corresponding to 2% of the conductor current can be extremely dangerous when applied to the actual transmission operation

Method used

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  • Apparatus and method for evaluating underground electric power cables
  • Apparatus and method for evaluating underground electric power cables
  • Apparatus and method for evaluating underground electric power cables

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Embodiment Construction

[0028] Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the accompanying drawings.

[0029] figure 1 is a block diagram showing the structure of the device for real-time evaluation of underground power cables according to the present invention. figure 2is a flow chart showing the method for real-time evaluation of underground power cables according to the present invention.

[0030] figure 1 The illustrated underground power cable evaluation device is applied, for example, to power cables 2 installed in power tunnels 1 . Such as figure 1 As shown, the underground power cable evaluation device includes: a cable current measuring device 3, which is used to measure the current flowing through the conductor of the cable 2; a sheath current measuring device 4, which is used to measure the current circulating through the sheath of the cable 2; cable temperature measurement The device 5 is used to measure the temperatur...

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PUM

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Abstract

Disclosed is an apparatus for evaluating underground electric power cables. In order to evaluate, in real time, the conductor temperature and allowable current of an underground electric power cable, and thus, to efficiently calculate the transmission capacity of the electric power cable, the apparatus includes a cable current measuring means (3), a sheath current measuring means (4), a cable temperature measuring means (5), a cable surrounding temperature measuring means (6), and a communication means (7) for connecting all the measuring means to a main computer (9). The main computer (9) calculates, in real time, the transmission capacity of the cable, based on data received from all measuring means via the communication means. The main computer (9) informs a line operator of the calculated transmission capacity and conductor temperature, and sends an alarm to the line operator when an abnormality in the power transmission of the cable occurs.

Description

technical field [0001] The present invention relates to a device for evaluating underground power cables included in power transmission equipment, and more particularly to a device for evaluating conductor temperatures and allowable currents of underground power cables in real time to efficiently calculate the transmission of power cables Capacity devices and methods. Background technique [0002] Generally, the transmission capacity of a power cable is determined based on the temperature range over which the insulating properties of the insulation surrounding the power cable are maintained. [0003] In the case of some power cables, especially cross-linked polyethylene (XLPE) cables, the conductor temperature of the cables is limited to 90°C. In the case of oil-filled (OF) cables, the conductor temperature is limited to 85°C. In particular, it is difficult to measure the conductor temperature of the power cable because the power cable is in a state where a high voltage is...

Claims

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Application Information

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IPC IPC(8): G01R31/00H02H7/22H02J13/00
CPCH02H7/228H02J13/00H02J13/00017H02J13/0004Y04S40/124Y02E60/00G01K7/02G01R19/0092G08B29/06G01R31/58
Inventor 南皙铉金秀吉
Owner LG CABLE INC
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