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

Method and system for obtaining zero initial phase reference sine function sequence with reduced frequency

A zero-initial phase and sine function technology is applied in the field of obtaining a zero-initial phase reference sine function sequence with reduced frequency, which can solve the problems of low measurement accuracy and unsuitable for high-accuracy sine parameters.

Active Publication Date: 2018-09-04
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above measurement method has low measurement accuracy and is not suitable for the measurement of high-accuracy sinusoidal parameters.

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 and system for obtaining zero initial phase reference sine function sequence with reduced frequency
  • Method and system for obtaining zero initial phase reference sine function sequence with reduced frequency
  • Method and system for obtaining zero initial phase reference sine function sequence with reduced frequency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0050] Although the steps in the present invention are arranged with labels, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted.

[0051] In one embodiment, the method for obtaining the zero initial phase reference sine function sequence of reduced frequency, such as figure 1 shown, including the following steps:

[0052] Step S101: Obtain the preliminary sequence length of the power signal according to the lower limit of the frequency range of the power signal, the preset sampling frequency and the preset integer signal cycle number;

[0053] Step S102: Sampling the power signal according to the prel...

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 and system for acquiring a zero initial phase reference sine function sequence for frequency reduction. The method comprises acquiring an electric power signal preliminary sequence length and a preliminary sequence; performing preliminary test of frequency for the preliminary sequence, and setting a reference frequency; acquiring an electric power signal unit periodic sequence length and a preset sequence length, and further obtaining a preliminary forward / deconvolution sequence; according to the preliminary forward / deconvolution sequence, acquiring a preliminary average initial phase; according to the preliminary average initial phase, the initial phase comparative value of +-Pi / 4 and a new initial point, acquiring a secondary forward / deconvolution sequence and a secondary average initial phase; and according to the secondary forward / deconvolution sequence and the secondary average initial phase, acquiring a zero initial phase reference cosine / sine function modulation sequence, and further acquiring a first / second multiplication sequence, and at last according to the first / second multiplication sequence, acquiring a zero initial phase reference sine function sequence for frequency reduction. The method and system for acquiring a zero initial phase reference sine function sequence for frequency reduction can improve the accuracy for sine parameter calculation and is suitable for application.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for obtaining a zero initial phase reference sine function sequence with reduced frequency. Background technique [0002] The frequency measurement, phase measurement, amplitude measurement, etc. of the power system are all measurements of sinusoidal parameters in essence. Fast Fourier transform and discrete Fourier transform are the basic methods to realize the measurement of sinusoidal parameters, and are widely used in power systems. However, the above method truncates the non-integer period of the signal sampling process, causing spectrum leakage, and the spectrum leakage will generate corresponding errors. [0003] In the measurement of the sinusoidal parameters of the power system, there are many measurement methods, such as adding a window function method, using an interpolation correction method, etc., to reduce the influence of the spectrum l...

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 Patents(China)
IPC IPC(8): G01R23/16
CPCG01R23/16
Inventor 黄卫剑李军吴乐庞志强
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com