Electrical insulator fault detector and detecting method thereof

Abstract

The invention belongs to a detecting device for electric equipment, in particular to an electrical insulator fault detector and a detecting method thereof which can be applied to the local discharge detection for electric equipment, the discharge detection for corona and the discharge detection for a high-pressure switch. The detector comprises a main bracket, an ocular lens and a laser which are installed on the main bracket, a sensor which is installed behind the laser, and a wave collector which is fixed on the main bracket behind the sensor. The sensor is connected with a host machine of a micro-computer. The host machine of the micro-computer is connected with the laser via power lines. A liquid crystal display is installed on the host machine of the micro-computer. The invention has simple, convenient and safe operation, can be operated remotely without cutting off power supply, decreases the labor intensity and promotes the working efficiency. The invention is mainly applied to remote detection for electrical insulator high-pressure lines and power supply devices, in order to avoid detecting via climbing electric pole one by one and save the labor and material resources.

Description

technical field [0001] The invention belongs to an electrical equipment detection device, and in particular relates to an insulator fault detector and a detection method that can be applied to electrical equipment partial discharge detection, corona discharge detection and high-voltage switch discharge detection. Background technique [0002] From the analysis of the deterioration characteristics and causes of insulators, it can be seen that there are differences between the deteriorated insulators and the good insulators in many aspects such as electrical performance, partial discharge, and temperature distribution. Based on these characteristics and differences, corresponding instruments or devices have been developed, and different measurement methods have been studied. Judging from the current detection methods, there are live detection and power failure detection; there are contact detection and non-contact detection. From the basis of the measurement method, there are...

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Problems solved by technology

However, the detection results are easily affected by the viewing angle, and the detection equipment is also expensive

[0015] Each of the above-mentioned detection methods has corresponding problems, such as: the direct observation method has unreliable ground observation, and it needs to go to the tower for detection and it is difficult to find faults in the insulator, such as dendritic channels; the insulator resistance measurement method has problems When measuring, the relative humidity of the air should not be too high, otherwise, it is easy to misjudge

In addition, it is not easy to carry out a large number of detections on transmission lines; the distribution voltage measurement method has the same disadvantages as the measurement of insulation resistance, which needs to be carried out in good weather.

The live contact operation is extremely dangerous; the AC withstand voltage method has the defect that the insulator needs to be replaced and it is difficult to measure on-site; the thermal imager detection of insulator deterioration is greatly affected by temperature changes, and is not suitable for discharges with long gaps. Sensitive issues; the ultraviolet imaging method exists when the conductive carbonized channel is formed on the surface of the insulator, and the partial discharge is required to be operated at night and in a positive temperature environment, which requires that the detection should be carried out in an environment with high humidity or even rainfall, and The detection result is easily affected by the viewing angle, and the detection equipment is also expensive

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