Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for detecting accuracy of optical current transformer for measuring

A technology of current transformers and detection methods, applied in the direction of measuring electric variables, voltage/current isolation, measuring devices, etc.

Inactive Publication Date: 2009-09-23
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is no mature method for measuring the accuracy of photoelectric current transformers

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
  • Method for detecting accuracy of optical current transformer for measuring
  • Method for detecting accuracy of optical current transformer for measuring
  • Method for detecting accuracy of optical current transformer for measuring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] 1 Technical requirements for photoelectric transformers

[0048] Photoelectric current transformers must meet all the technical requirements stipulated in the corresponding technical standards or technical conditions. The specific technical requirements are as follows:

[0049] 1.1 Photoelectric transformer error limit

[0050] 1.1.1 Current transformer for measurement

[0051] At any value under the rated power and rated power factor, the current error (ratio difference and phase difference) of the photoelectric CT measured should not exceed the limits listed in Table 11.

[0052] Table 1 Error limits for measuring CT

[0053]

[0054] 2 Verification equipment and conditions

[0055] 2.1 Main equipment

[0056] 2.1.1 Current transformer for measurement

[0057] 2.1.1.1 Standard current transformer or other proportional standard device (hereinafter referred to as current standard device). The accuracy level and technical performance of the current standard should...

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 detection of the accuracy of an optical current transformer, in particular to a method for detecting the accuracy of the optical current transformer for measuring. The detection method comprises the following steps of appearance inspection, measurement of insulation resistance, testing of power frequency voltage, and error measurement, wherein the error measurement comprises the following steps: taking a standard current transformer as the reference; and connecting homonymous measuring ends of primary winding of the current transformer to be detected together, directly or indirectly grounding one end of output ends of a current amplifier according to different situations. The technical proposal is adopted, thereby radically solving the problem of the accuracy of the optical current transformer for measuring, and being capable of effectively carrying out the error measurement for the accuracy of the optical current transformer for measuring to control the error of the accuracy of the optical current transformer for measuring in an allowable range.

Description

technical field [0001] The invention relates to the accuracy detection of a photoelectric current transformer, in particular to a method for detecting the accuracy of a photoelectric current transformer for measurement. Background technique [0002] At present, electromagnetic current transformers are widely used in power systems, but with the development of power systems in the direction of large capacity and high voltage, digital measurement, protection, dispatch and control of factories, stations and systems have become a development trend. The requirements for miniaturization, intelligence, and high reliability of equipment are also getting higher and higher. The existing electromagnetic transformer can no longer meet this requirement due to its structural characteristics and existing deficiencies. [0003] Compared with the traditional electromagnetic induction current transformer, the photoelectric current transformer has the following series of advantages: [0004] ...

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): G01R35/00G01R15/18
Inventor 陈文中何维国王之浩林一
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com