Power cable shock wave detection method

A power cable and detection method technology, which is applied in the field of power cable shock wave detection, can solve the problems of cable damage, long test process, and low test efficiency, and achieve the effects of convenient operation, system volume and weight reduction, and portability

Inactive Publication Date: 2021-01-22
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a power cable shock wave detection method to solve the problem that the current power cable shock wave detection method proposed in the above background technology has a long test process and low test efficiency, and is easy to cause damage to the cable.

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0020] see Figure 1-2 , an embodiment provided by the present invention: a power cable shock wave detection method, including the following steps: Step (1), the test equipment should be placed on a flat ground, and there should be no metal within one meter around Objects to prevent test interference; step (2), check the information of the cable under test, conduct electrical inspections at both ends of the cable, pick fire, and keep a safe distance from other equipment around; step (3), measure the insulation resistance, fully discharge after measurement, and Measure and record the length of the cable and the distance between the intermediate connectors; step (4), t...

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Abstract

The invention discloses a power cable shock wave detection method, which comprises the following steps that (1) test equipment is required to be placed on a flat ground, and metal objects are not required to exist within a range of one meter around the test equipment, so that test interference is prevented; (2) information of the tested cable is checked, electricity is checked and fire is picked at two ends of the cable, and a safe distance from other surrounding equipment is kept; (3) the insulation resistance is measured, fully discharging is carried out after measurement, and the length ofthe cable and the distance of an intermediate joint are measured and recorded; (4)wiring is tested, a power supply is connected, the other two phases of the tested cable are grounded, the power supplyis started, and equipment is connected; and (5) software is started, cable information is inputted, cable pulse calibration is carried out, the calibrator isdismounted after the calibration is completed, a discharge signal at a potential defect of the cable is excited, and acquisition and analysis are carried out. The single test process is short, only about one minute is needed, the test efficiency is high, and compared with a cable withstand voltage test, the damage to the cable is small.

Description

technical field [0001] The invention relates to the technical field of power detection, in particular to a power cable shock wave detection method. Background technique [0002] Oscillating wave voltage is a kind of voltage used for XLPE power cable detection that has been studied more at home and abroad in recent years. It has good equivalence with AC voltage and can find various defects in XLPE power cables, and the test will not damage the cables. cause damage. The OSW test system has the characteristics of short action time, convenient operation, light and flexible, and easy to carry and transport. At present, IEEE and some countries have formulated relevant standards for power cable withstand voltage test using OSW test system. The combination of withstand voltage and partial discharge test to determine the insulation status of cables has become a hot topic, and a 10kV cable partial discharge oscillatory wave detection system has also been developed. . Cable oscillat...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 许光可陈令英李星张围围云玉新王安东赵富强
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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