Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method and system for obtaining a sequence of reduced frequency sinusoidal functions of a power signal

A technology of power signal and sine function, which is applied in the field of power, can solve problems such as low measurement accuracy and unsuitability for high-accuracy sine parameters, and achieve the effect of improving accuracy and solving the problem of integer cycle truncation

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 a sequence of reduced frequency sinusoidal functions of a power signal
  • Method and system for obtaining a sequence of reduced frequency sinusoidal functions of a power signal
  • Method and system for obtaining a sequence of reduced frequency sinusoidal functions of a power signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] 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.

[0047] 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.

[0048] In one embodiment, the method for obtaining the frequency-reduced sinusoidal function sequence of the power signal, such as figure 1 shown, including the following steps:

[0049] 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;

[0050] Step S102: Sampling the power signal according to the preliminar...

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 obtaining a reduced frequency sine function sequence of an electric power signal. The method includes the steps of: obtaining an electric power signal preliminary sequence length and a preliminary sequence; performing preliminary frequency measurement on the preliminary sequence, and setting reference frequency; obtaining an electric power signal unit period sequence length and a preset sequence length, and further obtaining an initial forward / inverse sequence; obtaining an initial average initial phase according to the initial forward / inverse sequence; obtaining a secondary forward / inverse sequence and a secondary average initial phase according to an initial phase comparison value of the initial average initial phase and + / -pi / 4 and a new initial point; obtaining a cosine / sine function modulation sequence according to the secondary forward / inverse sequence and the secondary average initial phase; and obtaining a first / second multiplication sequence according to preset fine-tuning frequency and the cosine / sine function modulation sequence, and finally obtaining a reduced frequency sine function sequence according to the first / second multiplication sequence. The method provided by the invention improves the degree of accuracy of 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 frequency-reduced sinusoidal function sequence of electric power signals. 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 lea...

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): G01R23/167
CPCG01R23/167
Inventor 李锋李军吴乐庞志强
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