Partial discharge source location method and partial discharge source location system
A technology of partial discharge and positioning method, which is applied in the direction of testing dielectric strength, etc., can solve the problem of high sensor installation accuracy, and achieve the effect of accurate positioning, simple and flexible operation
Active Publication Date: 2017-10-27
STATE GRID CORP OF CHINA +2
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[0018] The present invention aims to provide a partial discharge source positioning method and a partial discharge source positioning system to solve the problem of high sensor installation accuracy in field implementation in the prior art
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[0041] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0042] An embodiment of the present invention provides a partial discharge source positioning system, figure 2 is a schematic diagram of a positioning system for a partial discharge source according to an embodiment of the present invention, such as figure 2 As shown, the positioning system of the partial discharge source of the embodiment of the present invention includes: a first UHF sensor 11 and a second UHF sensor 12, which are respectively used to obtain UHF partial discharge signals; the first UHF sensor 11 and the second UHF sensor 12 are respectively connected to the dual-channel oscilloscope 13 through radio frequency coaxial cables 14. Preferably, the lengths of the coaxial cables...
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Provided are a locating method of a partial discharge source and a locating system of the partial discharge source. The locating method of a partial discharge source comprises: arranging two same UHF sensors on opposite faces of a device to be detected to acquire ultra-high frequency partial discharge signals; moving one or two of the two same UHF sensors along the connection line of the two same UHF sensors, and simultaneously outputting the acquired ultra-high frequency partial discharge signals through oscilloscopes respectively connected to the two same UHF sensors; and when the waveforms of the ultra-high frequency partial discharge signals acquired by the two same UHF sensors coincide, determining that distances from the partial discharge source in the device to be detected to a first location point and a second location point where the two same UHF sensors are currently located are equal. By using the solutions of the present invention, there is no need for acquiring and measuring the time difference of the ultra-high frequency partial discharge signals in the location process, the influence of interference signals caused by factors such as signal propagation path, signal refraction and reflection and the like is also avoided, the operation is convenient and flexible, and the locating is accurate.
Description
technical field [0001] The invention relates to the field of high voltage and insulation, in particular to a method for locating a partial discharge source and a system for locating a partial discharge source. Background technique [0002] With the increasing demand for electricity in the society and the rapid development of the power industry, the safe operation of large-scale power transmission networks has become a major concern of the power industry, and the health of power transmission and transformation equipment is a key factor for the safe and stable operation of the power grid. Studies have shown that insulation faults are common in power transmission and transformation equipment, and the precursor of insulation faults is often manifested as partial discharge. It is generally believed that partial discharge in power equipment is an important form of equipment hidden dangers. Partial discharge will not only seriously affect the electric field distribution and cause e...
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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 段大鹏阎春雨任志刚毕建刚齐伟强郭鑫宇
Owner STATE GRID CORP OF CHINA