Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for measuring compensation of power quality device

A power quality and post-compensation technology, which is applied in the field of measurement and compensation of power quality devices, can solve problems affecting the accuracy of measurement results, accuracy error amplification, deviation, etc., to eliminate deviations in measurement results, improve measurement accuracy, and achieve phase synchronization. Effect

Active Publication Date: 2019-11-22
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the current power grid structure is showing a trend of diversification and complexity. The injection of various harmonics and the impact of nonlinear loads make the accurate measurement of electric energy encounter more and more difficulties, because when the power quality device measures, A very small phase deviation will cause a huge deviation, and sometimes the accuracy error is amplified to an unacceptable level, seriously affecting the accuracy of the measurement results

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 measuring compensation of power quality device
  • Method for measuring compensation of power quality device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0055] see figure 1 , is a schematic flowchart of a method for measuring and compensating a power quality device provided by an embodiment of the present invention, and the method includes steps S1 to S8:

[0056] S1. Obtain the fundamental wave and harmonic of the power quality device after harmonic analysis, and obtain the fundamental voltage amplitude, fundamental voltage amplitude, fundamental voltage phase and fundamental current phase of the fundamental wave,...

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 discloses a method for measuring compensation of a power quality device. The method includes the steps: acquiring a fundamental wave and a harmonic wave of a power quality device after harmonic analysis; acquiring a voltage theoretical conversion coefficient and a current theoretical conversion coefficient; acquiring an automatic calibration voltage amplitude compensation coefficient, an automatic calibration current amplitude compensation coefficient, an automatic calibration voltage phase compensation coefficient and an automatic calibration current phase compensation coefficient; acquiring a voltage interval amplitude compensation coefficient and a current interval amplitude compensation coefficient; acquiring a voltage frequency phase compensation coefficient and a current frequency phase compensation coefficient; acquiring a voltage temperature amplitude compensation coefficient and a current temperature amplitude compensation coefficient; and calculating the amplitude and phase of the compensated fundamental wave voltage, the amplitude and phase of the compensated fundamental wave current, the amplitude and phase of the compensated harmonic voltage, and the amplitude and phase of the compensated harmonic current. Therefore, the phase synchronization of the power quality device is realized and the measurement accuracy of the power quality device is improved effectively.

Description

technical field [0001] The invention relates to the technical field of power measurement, in particular to a method for measuring and compensating a power quality device. Background technique [0002] At present, with the rapid development of the power grid, not only the demand for electricity has increased greatly, but also users have higher and higher requirements for power quality. In particular, the current power grid structure is showing a trend of diversification and complexity. The injection of various harmonics and the impact of nonlinear loads make the accurate measurement of electric energy encounter more and more difficulties, because when the power quality device measures, A very small phase deviation will cause a huge deviation, and sometimes the accuracy error is amplified to an unacceptable level, seriously affecting the accuracy of the measurement results. Contents of the invention [0003] The purpose of the embodiment of the present invention is to provi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16G01R25/00G01R19/04G01R35/00
CPCG01R19/04G01R23/16G01R25/00G01R35/005
Inventor 刘桓瑞丁泽俊
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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