A method for identifying conductor material in equipment based on frequency characteristics
A technology of conductor material and identification method, applied in the field of electric power, can solve problems such as loss, missed detection, difficulty in ensuring the safety performance of the power grid, etc., and achieve the effect of easy operation
Active Publication Date: 2016-01-20
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
For most equipment (such as transformers, transformers, etc.), the traditional detection method generally adopts dismantling and destructive inspection, which belongs to destructive testing. Once the equipment is disassembled, it will become a waste product. Grid security performance
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[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0019] The technical idea of the present invention: due to the different conductor materials in the equipment, the law of material resistance changing with the power frequency is different, so the change curve of the resistance of the same material with the power frequency is within a certain range. The change curve of conductor resistance with power frequency exceeds the curve range of copper material, which can be judged as non-copper material.
[0020] see figure 1 , the identification method of the present invention specifically includes the following steps:
[0021] Calibration steps: Acco...
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The invention discloses a frequency-characteristics-based method for identifying inner conductor materials of equipment, which is used for identifying whether an inner conductor in the equipment is made of copper materials under the condition of not disassembling the equipment. The method comprises the following steps of: a calibration step, namely pre-determining a changing curve of the resistance of a copper conductor along with the power supply frequency in sample equipment; a measuring step, namely measuring the changing curve of the resistance of the conductor material in equipment to be detected; a determining step, namely if the changing curve of the resistance of the conductor material in the equipment to be detected is within an envelope line of the changing curve of the resistance of the copper conductor along with the power supply frequency in the sample equipment, determining that the conductor material in the equipment to be detected is copper, otherwise, determining that the conductor material in the equipment to be detected is not copper. Compared with traditional dissembled damage type selective examination, the method disclosed by the invention effectively completes the identification of the conductor materials under the condition of not disassembling equipment, and therefore, the method has the characteristics of non-destruction, rapidness and easiness for operation.
Description
technical field [0001] The invention belongs to the field of electric power technology, and specifically relates to a method for identifying conductor materials in equipment based on frequency characteristics, which is used to identify whether the conductor material in the equipment is copper without dismantling the equipment. Background technique [0002] In the power system, copper or aluminum is generally used as the conductor material of various types of equipment. For example, the winding material of motor products (transformers, motors, reactors, etc.) generally uses copper magnet wires, while overhead transmission lines generally use steel-cored aluminum stranded wires. . Since the price of aluminum is much lower than that of copper, when selecting conductor materials, there are situations where manufacturers use aluminum magnet wires instead of copper magnet wires in equipment. However, the conductor material used in the equipment is a key factor affecting its relia...
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IPC IPC(8): G01N27/04
Inventor 张丹丹刘亚青武兰民王金虎丁漫江肖黎明
Owner HUAZHONG UNIV OF SCI & TECH