Voltage transformer error test power frequency resonance step-up automatic test method in GIS (geographic information system)

A power frequency resonant step-up and voltage transformer technology, which is applied in the direction of instruments, measuring electronics, measuring devices, etc., can solve the problems of time-consuming, labor-intensive, low work efficiency, etc., and achieve the effect of improving the efficiency of on-site testing, and the testing process is simple and safe

Inactive Publication Date: 2013-02-13
STATE GRID HEBEI ELECTRIC POWER RES INST +2
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the uncertainty of the capacitance of the pipeline, the resonant frequency of 50 Hz needs to be adjusted repeatedly during the field test, which is time-consuming and labori

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
  • Voltage transformer error test power frequency resonance step-up automatic test method in GIS (geographic information system)
  • Voltage transformer error test power frequency resonance step-up automatic test method in GIS (geographic information system)
  • Voltage transformer error test power frequency resonance step-up automatic test method in GIS (geographic information system)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] A kind of voltage transformer error test power frequency resonance step-up automatic test method in GIS, its characteristic is in concrete steps as follows (see Figure 1-3 ):

[0043] (1) For adjustable reactor L x To calibrate:

[0044] a. Build a calibration platform:

[0045] The calibration platform consists of frequency conversion resonant test power supply BDY, excitation transformer T, adjustable reactor L x , standard capacitance C 0 and capacitive voltage divider; the adjustable reactor L x It consists of 1-n series connections; the output terminal of the variable frequency resonant test power supply BDY is connected to the primary of the excitation transformer T, and the adjustable reactor L x with standard capacitance C 0 The first series resonant circuit formed in series is connected to the secondary of the excitation transformer T, and the capacitive voltage divider is composed of a capacitor C 1 -C 3 composition, capacitance C 1 -C 3 After bei...

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 voltage transformer error test power frequency resonance step-up automatic test method in a GIS (geographic information system). An error test method of a voltage transformer Px in the GIS comprises the following steps of: sending out an automatic tuning instruction by a PC (personal computer) machine to control an alternating voltage signal of which the output frequency of a frequency conversion resonance test power supply is 30-300Hz; searching the initial resonant frequency f1 of a second series resonant circuit according to resonance voltage feed back by a resonance monitoring input end; reading the initial resonant frequency f1 by the PC machine; computing the capacitance of GIS pipeline distributed capacitance Cx; computing the inductance value L50 of a GIS pipeline voltage transformer Lx when the frequency is 50Hz; searching the iron core extension length d2 which corresponds to the L50 in database; and displaying the iron core extension length d2 by the PC machine. The method has the advantages that the automatic test of the power frequency resonance step-up when the voltage transformer field error test in the GIS is carried out can be realized, and the efficiency of field test can be improved.

Description

technical field [0001] The invention relates to a power frequency resonance step-up automatic test method for a voltage transformer error test in a GIS. Background technique [0002] According to the relevant regulations of the national electric power department, the power grid operation enterprises should carry out the on-site error test of the gateway metering transformer regularly every year. The verification cycle of the electromagnetic voltage transformer is ten years, and the verification cycle of the capacitive voltage transformer is four years. The transformers newly put into operation must be tested for errors, and the task of on-site testing is relatively heavy. [0003] For voltage transformers installed in fully enclosed combined electrical appliances (GIS), due to the existence of distributed capacitance in pipelines, and the different sizes and specifications, lengths and wiring arrangements of GIS gas chamber pipelines, the capacitance of GIS pipelines varies....

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): G01R31/00G01R35/02
Inventor 孙冲耿建坡史轮岳国义
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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