Device for measuring resistive current fundamental component of zinc oxide arrester

A technology of resistive current and fundamental wave components, applied in measurement devices, reactive power/actual component measurement, phase angle between voltage and current, etc. Effect of Stability Guarantee

Inactive Publication Date: 2013-01-30
GUANGZHOU SCISUN TECH
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a measuring device for the fundamental wave comp...

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
  • Device for measuring resistive current fundamental component of zinc oxide arrester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] In the following, the present invention will be further described in conjunction with the drawings and specific embodiments.

[0022] Such as figure 1 As shown, the measuring device for the fundamental wave component of the resistive current of the zinc oxide arrester includes the following components:

[0023] A data acquisition unit LC1 2, used to collect the current signal In corresponding to the secondary voltage signal of the bus and the current signal Is of the 220V AC power supply, and convert the current signal In into a voltage signal Un, and convert the current signal Is into a voltage signal Us , performing Fourier transform on the voltage signal Un and the voltage signal Us to obtain the fundamental phase Ph1 of the voltage signal Un relative to the voltage signal Us; specifically, the data acquisition unit LC1 2 includes: a first current sensor 21 for acquiring The current signal In corresponding to the secondary voltage signal of the bus bar, and convert ...

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 relates to a device for measuring resistive current fundamental component of a zinc oxide arrester; and the device comprises a data collecting unit LC1, a data collecting unit LC2 and a DSP (Digital Signal Processor) signal processor, wherein the data collecting unit LC1 is used for carrying out Fourier transform on a voltage signal Un and a voltage signal Us so as to obtain a fundamental phase Ph1 of the voltage signal Un relative to the voltage signal Us; the data collecting unit LC2 is used for converting a current signal Is into a voltage signal Us and carrying out Fourier transform on a power frequency leakage voltage signal Ux and the voltage signal Us so as to obtain a fundamental phase Ph2 of the power frequency leakage voltage signal Ux relative to the voltage signal Us; and the DSP signal processor is used for calculating a phase difference Ph of a power frequency leakage current signal Ix relative to the voltage signal Un according to the fundamental phase Ph1 and the fundamental phase Ph2. According to the invention, a complicated analog signal processing circuit is not needed, stability in long-time working is guaranteed and influences from harmonic interference can be effectively suppressed.

Description

[0001] technical field [0002] The invention relates to a measuring device for the resistive current fundamental wave component of a zinc oxide arrester. [0003] Background technique [0004] To realize the measurement of the resistive current parameters of the arrester, the key is how to accurately obtain and calculate the phase difference of the two power frequency fundamental wave current signals. The traditional method is to use the zero-crossing comparison technology to obtain the time difference of the two signals through a counter, and then convert it into a phase difference according to the period of the signal. This method needs to adopt a complex hardware structure, and has extremely high requirements on the working stability of the filter (filtering the third and above harmonics) and the zero-crossing comparator, and it is difficult to guarantee the long-term stability of the measurement accuracy. [0005] Contents of the invention [0006] The object of th...

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): G01R25/00G01R19/06
Inventor 陈泽洪云陈勇陈小胜邓辰坤叶海波
Owner GUANGZHOU SCISUN TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap