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Enhanced 10kV overhead insulated wire partial discharge inspection device and inspection method

An overhead insulation and partial discharge technology, which is used in measurement devices, radio wave measurement systems, and dielectric strength testing. The effect of signal delay and improving anti-interference ability

Active Publication Date: 2020-07-24
STATE GRID SHAANXI ELECTRIC POWER RES INST +4
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Problems solved by technology

[0005] The invention provides an enhanced 10kV overhead insulated wire partial discharge inspection device and inspection method, which can quickly determine whether partial discharge occurs in a 10kV overhead insulated wire, and solve the problem of low efficiency and poor anti-interference ability of the current 10kV overhead insulated wire ultrasonic inspection The problem

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  • Enhanced 10kV overhead insulated wire partial discharge inspection device and inspection method
  • Enhanced 10kV overhead insulated wire partial discharge inspection device and inspection method
  • Enhanced 10kV overhead insulated wire partial discharge inspection device and inspection method

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[0043] In order to make the purpose and technical solution of the present invention clearer and easier to understand. The present invention will be further described in detail below in conjunction with the drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular ori...

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Abstract

The invention discloses an enhanced 10kV overhead insulated wire partial discharge inspection device and an inspection method. The device comprises an ultrasonic sensor, an ultrahigh frequency antennasensor, an ultrasonic amplification filter circuit, an ultrahigh frequency amplification filter circuit, a detection circuit, a dual-channel A / D converter, an ARM microprocessor and a memory card. The device mainly aims at the problems of poor anti-interference capability and low efficiency of a single ultrasonic detection device, the ultrahigh frequency antenna sensor is additionally arranged,and overhead wire partial discharge detection is realized in two detection modes of ultrasonic and electric signals. Meanwhile, the ultrasonic and ultrahigh frequency detection information is utilized, so that common electromagnetic interference and ultrasonic interference can be avoided, and the anti-noise capability of the system is improved. In addition, according to the arrival time differenceof the ultrasonic and ultrahigh frequency pulse signals, the distance between the defect position and the detection point can be obtained, a new reference is provided for defect positioning, and thedefect searching efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of insulation state detection of power equipment, and relates to a partial discharge detection device and inspection method specially applied to inspections of 10kV or 35kV overhead insulated lines or transformer substations. Background technique [0002] In the main urban areas, suburbs and vast rural areas of cities in my country, overhead insulated wires and overhead conductors are currently widely used in 10kV medium-voltage power distribution grids. These lines run extensively alongside roads in cities or in wooded areas between farmlands. Deterioration of insulators on line poles, friction and contact between lines and tree branches, etc. lead to abnormal discharges / partial discharges gradually occurring in overhead conductors. These discharge points will reduce the insulation level of lines and eventually lead to interruption of power supply. [0003] At present, my country's power system mainly uses...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01S11/02G01S11/14
CPCG01R31/12G01R31/1209G01S11/02G01S11/14
Inventor 琚泽立蒲路吕新良侯喆刘青吴经锋王森杨博颜源李洪杰王彦超赵学风高峰段玮王辰曦
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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