Oscillation wave partial discharge detection system for cable based on asynchronous double-end measurement

A partial discharge detection and oscillatory wave technology, applied in the direction of testing dielectric strength, etc., can solve the problems of partial discharge location difficulty, reflected signal distortion, and unable to collect reflected signals, etc., to achieve simplified partial discharge location algorithm and high positioning accuracy Effect
CN102565637AActive Publication Date: 2012-07-11ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Publication Date
2012-07-11

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Abstract

The invention discloses an oscillation wave partial discharge detection system for a cable based on double-end asynchronization. In a double-end asynchronization data acquisition mode, the system is characterized by comprising a cable to be detected, and an oscillation wave generation device, signal acquisition sub-systems, a program control wide-range partial discharge calibrator and an upper computer, which are respectively connected with the cable to be detected, wherein under the control of the upper computer, the oscillation wave generation device generates a damping oscillation wave; the signal acquisition sub-systems which are arranged at two ends of the cable transmit waveform and data measuring values which are acquired to the analysis software of the upper computer; and the analysis software performs centralized processing and analysis, judges whether partial discharge is generated, and determines the partial discharge amount, so that testing of the partial discharge of the cable is realized. The system has the advantage that: by adoption of a double-end measurement method, the testing accuracy and positioning accuracy of the partial discharge are greatly improved.
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Description

technical field

[0001] The invention relates to a cable oscillation wave partial discharge detection system based on asynchronous double-terminal measurement. It is suitable for partial discharge detection and defect location of cables. Background technique

[0002] With the needs of the development of the power system and the improvement of users' requirements for the reliability of power supply, the reliability of high-voltage power equipment operation has received more and more attention. However, the insulation problem of cables in the power grid has become more and more prominent, which seriously affects the power supply. Improved reliability. The study found that the partial discharge of the cable is closely related to its insulation condition, and the change of the partial discharge indicates that the cable insulation may have defects that endanger the safe operation of the cable. Therefore, many experts and scholars at home and abroad and some international power a...

Claims

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