Interference suppression method and device in UHF partial discharge detection
A partial discharge and ultra-high frequency technology, which is used in the field of partial discharge and ultra-high frequency detection and anti-interference in substations, can solve problems such as high-frequency narrow-band interference, and achieve the effect of ensuring effectiveness and avoiding high-frequency narrow-band interference.
Active Publication Date: 2018-11-20
BEIJING HUADIAN ZHICHENG ELECTRICAL EQUIP CO LTD
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[0004] The object of the present invention is to provide a method and device for suppressing interference in partial discharge ultra-high frequency detection to solve the problem of high-frequency narrow-band interference in partial discharge ultra-high frequency detection
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[0020] 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.
[0021] figure 1 It is a flow chart of the interference suppression method in the partial discharge UHF detection according to the embodiment of the present invention, as figure 1 As shown, the method includes the following steps S11-S14:
[0022] Step S11: within the measurement frequency range of the partial discharge UHF detection system, use the point frequency method step by step to complete the test of the signal energy distribution within the entire measurement frequency range.
[0023] Step S12: Calculate the signal difference peak value of the test data sequence corresponding to each frequency point.
[0024] Step S13: Repeat the above steps m times, calculate the average value of th...
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The invention discloses an interference suppression method and an interference suppression device used in partial discharge UHF detection, which are used for solving the problem of high-frequency narrowband interference in partial discharge UHF detection. The interference suppression method comprises the steps of: completing a trial test of signal energy distribution in a whole measurement frequency range in a gradually stepping manner of adopting a point frequency method within the measurement frequency range of a partial discharge UHF detection system; calculating a signal difference peak value of a test data sequence corresponding to each frequency point; repeating the previous steps for m times, calculating an average value of the signal difference peak values of the test data sequence for m times, taking the frequency point corresponding to the maximum average value of the signal difference peak values as the optimal test frequency point in the current environment, wherein m is a positive integer; and switching a system operating mode to a narrowband test operating mode taking the optimal test frequency point in the current environment as a center.
Description
technical field [0001] The invention relates to the technical field of substation partial discharge ultra-high frequency detection and anti-interference technology, especially the interference suppression method applied in the detection of partial discharge in the complex electromagnetic environment of the substation with narrow-band interference, and also relates to the realization of the narrow-band interference in the complex electromagnetic substation. Apparatus for interference suppression methods in partial discharge detection in the environment. Background technique [0002] In recent years, the UHF method has been widely used in the detection of partial discharge of high-voltage electrical equipment such as GIS and transformers due to its good anti-interference, high sensitivity, and positioning. However, in the practice of using UHF detection method for partial discharge detection of electrical equipment, especially in the field of partial discharge detection of equ...
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IPC IPC(8): G01R31/12
Inventor 唐志国
Owner BEIJING HUADIAN ZHICHENG ELECTRICAL EQUIP CO LTD