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Device for detecting alternating-current resistance of high-pressure cable split conductor

A technology for splitting conductors and AC resistances, which is used in measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., to achieve the effects of simple structure, convenient use and high measurement accuracy

Active Publication Date: 2012-10-31
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no perfect AC resistance test method and forming test equipment, so the study of AC resistance characteristics is of great significance for the manufacture, inspection and selection of cable conductors, especially large-section split cable conductors.

Method used

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  • Device for detecting alternating-current resistance of high-pressure cable split conductor
  • Device for detecting alternating-current resistance of high-pressure cable split conductor
  • Device for detecting alternating-current resistance of high-pressure cable split conductor

Examples

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Embodiment

[0012] Such as figure 1 As shown, a device for detecting the AC resistance of a split conductor of a high-voltage cable, the device includes a meter 1, a feedthrough transformer 2, a sensor 3, and a thermocouple assembly. The feedthrough transformer 2 is connected to both ends of the conductor 5 for supplying current to the conductor 5 . The sensor 3 is connected with the feedthrough transformer 2 . One input end of the meter 1 is connected to the feedthrough transformer 2 through the signal line 4, and the other input end is connected to the sensor 3 through the signal line, and is used to convert the obtained conductor voltage and current signals into vector angles. A thermocouple assembly is placed on a conductor to measure the temperature of the conductor. The measuring temperature range of the thermocouple assembly is 40°~120°. Conductor 5 is a cable sample. First, the core-through transformer 2 is used to provide a large current to the short-circuited cable sample. ...

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Abstract

The invention relates to a device for detecting alternating-current resistance of a high-pressure cable split conductor. The device comprises a measuring meter, a center-through transformer, a sensor and a thermo-couple assembly, wherein the center-through transformer is connected with two ends of a conductor and is used for supplying current for the conductor, the sensor is connected with the center-through transformer, one input end of the measuring meter is connected with the center-through transformer by a signal wire, the other end of the measuring meter is connected with the sensor by a signal wire and is used for converting acquired voltage and current signals of the conductor into vector angles, and the thermo-couple assembly is arranged on the conductor and is used for measuring the temperature of the conductor. Compared with the prior art, the device has the advantages of being simple in structure, convenient to use, high in measurement accuracy and the like.

Description

technical field [0001] The invention relates to a device for detecting AC resistance, in particular to a device for detecting the AC resistance of a split conductor of a high-voltage cable. Background technique [0002] The DC resistance of the conductor is an important parameter to evaluate the electrical performance of the cable. However, for large cross-section cables for AC transmission, due to the existence of the skin effect, the current density in the conductor is not evenly distributed, but gradually decreases from the surface to the center along the radial direction of the cable conductor, so the equivalent effective resistance is greater than its DC resistance, this is AC resistance, and AC resistance is the effective resistance of conductors in power lines that generate heat due to loss. With the continuous increase of power transmission capacity, the voltage level of cables is getting higher and higher, and the cross-sectional area of ​​conductors is also gettin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/16G01R27/08
Inventor 张丽孟毓李海徐晓峰陆歆
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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