Poor contact detection method based on partial discharge technology
A partial discharge detection and poor contact technology, applied in the direction of electrical connection testing, measuring electricity, measuring devices, etc., can solve the problems of difficult detection, poor contact of connectors, etc., achieve high sensitivity, high reliability, and solve the difficulty of poor contact detection Effect
Inactive Publication Date: 2016-12-07
CHINA THREE GORGES UNIV
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a detection method for poor contact based on partial discharge technology, which can solve the problem of difficulty in detecting poor contact of low-voltage electrical equipment connectors, and the detection reliability is high, and the detection process will not affect the electrical equipment. normal operation
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[0029] The principle of the present invention is: when the connectors of low-voltage electrical equipment are operated for a long time, the contact will be loosened due to reasons such as oxidation, vibration, corrosion, etc., and there will be tiny gaps on some contact surfaces. When the micro gaps develop to a certain extent, it will lead to poor contact. , Under the action of a certain voltage, the electric field in the gap reaches a certain level and will produce a partial discharge phenomenon. Therefore, the partial discharge detection method can be used to detect poor contact of low-voltage electrical equipment connectors.
[0030] A method for detecting poor contact based on partial discharge technology, which uses a partial discharge detection device to directly detect the condition of the connecting piece, and detects the fault at the initial stage of poor contact of the connecting piece 1 to be tested.
[0031] A detection method for poor contact based on partial disc...
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The invention discloses a poor contact detection method based on the partial discharge technology, and the method comprises the steps: leading out an anti-interference lead wire from a to-be-detected connection part, obtaining an electric signal, carrying out the filtering, transmitting the electric signal to a partial discharge detector for detection through a detection impedor and a coupling capacitor, and poking a wire surrounding the to-be-detected connection part through employing an insulating rod. If a continuous discharge signal is detected, the connection part can be judged to be in poor contact. The method provided by the invention can solve a problem that the poor contact of a low-voltage electrical equipment connection part is difficult to detect, and is high in detection reliability. Moreover, the detection process cannot affect the normal operation of electrical equipment.
Description
technical field [0001] The invention relates to the field of fault detection of electrical equipment, in particular to a detection method for poor contact based on partial discharge technology. Background technique [0002] The metal connectors of electrical equipment mainly include rivets, bolts, welding rods, pivots, etc., and these connectors will inevitably have tiny gaps or cracks during the processing process. When these defective connectors are used to connect electrical equipment, it is easy to occur. Poor contact phenomenon. Even if a qualified connector is connected to electrical equipment, it will cause poor contact due to long-term corrosion, oxidation, wear and other reasons. The result of poor contact will lead to a high temperature rise in the connecting parts, and even burn out these electrical equipment in severe cases. [0003] Therefore, it is necessary to detect the state of the connectors in order to detect poor contact in time. At present, the poor c...
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IPC IPC(8): G01R31/04G01R31/12
CPCG01R31/1227G01R31/66
Inventor 王成江刘强张琦王晓娟
Owner CHINA THREE GORGES UNIV