Unlock instant, AI-driven research and patent intelligence for your innovation.

On-line monitoring method for resistive current of lightning arrester based on hanning window phase difference method

A phase difference method and resistive current technology, applied in the direction of only measuring current, measuring current/voltage, instruments, etc., can solve problems such as data cannot be transmitted far, poor sensor performance, unstable system operation, etc.

Inactive Publication Date: 2019-04-02
太平湾发电厂
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Many problems occurred during the operation of these systems, including poor sensor performance, poor anti-interference ability of the system, inaccurate data processing, inability to transmit data remotely, unstable system operation, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • On-line monitoring method for resistive current of lightning arrester based on hanning window phase difference method
  • On-line monitoring method for resistive current of lightning arrester based on hanning window phase difference method
  • On-line monitoring method for resistive current of lightning arrester based on hanning window phase difference method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0068] The present invention is an on-line monitoring method for the resistive current of the arrester based on the hanning window phase difference method. The voltage and current signals obtained by sampling are converted into digital signals through a conversion circuit, and then sent to a microprocessor through fast discrete Fourier transform. The signal is analyzed in the frequency domain. The discrete spectrum correction technology of the windowed phase difference method is used to improve the discrete Fourier analysis. This correction technology is based on the discrete Fourier transform and is easy to implement on the microprocessor.

[0069] The present invention is an online monitoring method for the resistive current of a surge arrester based on the hanning window phase difference method, which includes the following steps:

[0070] (1) In order to analyze the continuous electric parameter signal, the electric parameter signal is first sampled and digitized in the time do...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of power equipment, and in particular relates to an online monitoring method for a resistive current of a lightning arrester based on a hanning window phase difference method. The invention relates to an online monitoring of a resistive current of a zinc oxide lightning arrester MOA, in particular to a working method of an online monitoring system for the resistive current of the MOA using a fast discrete Fourier transform FFT with a hanning window. The method converts voltage and current signals which are sampled into digital signals through a conversion circuit, and then sends the signals to a microprocessor to analyze the signals in the frequency domain by the fast discrete Fourier transform. The method improves the discrete Fourier analysisby using the discrete spectrum correction technique of the windowed phase difference method. The correction technique is based on the discrete Fourier transform and is easily implemented on the microprocessor. The method not only improves the accuracy of the resistance current test result, but also can more accurately monitor the aging degree of the lightning arrester.

Description

Technical field [0001] The invention belongs to the technical field of power equipment, and in particular relates to an online monitoring method for the resistive current of a surge arrester based on a hanning window phase difference method. It is a kind of zinc oxide arrester MOA resistive current online monitoring, specifically using the MOA resistive current online monitoring system using fast discrete Fourier transform FFT with hanning window. Background technique [0002] Lightning arrester is a device used to protect various power equipment in the power system. It can protect the various power equipment connected in parallel from the impact of abnormal high voltage, thereby ensuring the safe power supply of the entire power system, so its normal operation It plays a very important role in power equipment and even the entire power system. [0003] The arrester is connected between the voltage bus and the earth, and is connected in parallel with the electric equipment protecte...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 王延廷刘长江刘兴山王金帅苏有权
Owner 太平湾发电厂