A Synchronous Common Mode Noise Reduction Method for High Frequency Noise Synthesis
A high-frequency noise and noise reduction technology, which is applied in the field of high-frequency noise synthesis and synchronous common-mode noise reduction, can solve problems such as the inability to switch channels of anti-interference devices, so as to improve anti-interference ability, accuracy, accuracy and realism reliability effect
Active Publication Date: 2019-12-13
BEIJING HUADIAN ZHICHENG ELECTRICAL EQUIP CO LTD
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Problems solved by technology
[0004] The invention adopts multi-channel self-defined setting technology, which solves the problem that the existing anti-interference device channels cannot be switched and has limitations
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Embodiment 2
[0056] The high-frequency noise synthesis synchronous common-mode noise reduction method in this embodiment is an improvement on the basis of Embodiment 1. The technical content disclosed in Embodiment 1 will not be described repeatedly, and the content disclosed in Embodiment 1 also belongs to the disclosure of this embodiment. content.
[0057] In this embodiment, the following steps are also included:
[0058] The polarity of Vn and V2 is the same through the collection of sensors of each channel, and if Vn>V2 exists, then Vn is an interference signal;
[0059] The pulse in the C2 channel is set to 0, that is, V2=0; thereby realizing the effect of noise reduction.
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The invention is applied to the technical field of local discharge high-frequency detection of high voltage electrical equipment, and specifically relates to a high-frequency noise synthesis synchronous common mode noise reduction method. The high-frequency noise synthesis synchronous common mode noise reduction method includes the following steps: S1, providing a plurality of channel sensors; S2,connecting the plurality of channel sensors with the same discharge loop in parallel through the corresponding transmission lines respectively; S3, utilizing a calibration source to generate a discharge loop, and setting the peak value of the discharge loop as V; S4, utilizing the plurality of channel sensors to respectively detect the amplitude of each channel; S6, in a plurality of customized channel interfaces, setting a C2 channel as the main channel and the residual channels C1, C3,..., Cn as the noise channels; S7, respectively connecting the each channel sensor with high-frequency detection equipment correspondingly, and performing signal acquisition; and S8, drawing a PRPD spectrogram by means of the acquired data of the each channel sensor. The high-frequency noise synthesis synchronous common mode noise reduction method utilizes the multi-channel custom setting technology to solve the problem that a current anti-interference device cannot realize conversion among channels and has limitation.
Description
technical field [0001] The invention is applied to the technical field of high-frequency detection of partial discharge of high-voltage electrical equipment, and in particular relates to a synchronous common-mode noise reduction method for high-frequency noise synthesis. Background technique [0002] Anti-interference has long been the core of partial discharge on-line detection technology. For the high-frequency current method, because the relative detection frequency is still low, generally lower than 100MHz, various high-frequency harmonics, narrow-band interference and noise interference in the ground network will seriously affect the accuracy of high-frequency method detection. Due to the complex on-site environment and various types of interference, the extraction of partial discharge signals with overlapping frequency bands with the interference, that is, the realization of the noise reduction function, has become a bottleneck in the field application of high-frequenc...
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IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 唐志国王倩张海波唐铭泽
Owner BEIJING HUADIAN ZHICHENG ELECTRICAL EQUIP CO LTD