Synchronous motor parameter identification method based on atom decomposition method

A synchronous motor, atomic decomposition technology, applied in the field of signal processing, can solve the problem of "end effect" which is difficult for EMD signals to solve

Active Publication Date: 2017-05-31
NANJING INST OF TECH
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the EMD signal of HHT has the problem of "endpoint effect" which is difficult to solve
[0007] Based on the local mean decomposition (LMD) ide

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
  • Synchronous motor parameter identification method based on atom decomposition method
  • Synchronous motor parameter identification method based on atom decomposition method
  • Synchronous motor parameter identification method based on atom decomposition method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0056] The specific steps of this algorithm are as follows:

[0057] Step 1) Construct the relevant atomic library, and serialize the atom discretization parameters, the specific content is:

[0058] Step 11) The fundamental wave is the main component of the sudden short-circuit current. In order to accurately analyze the parameters of the synchronous motor, it is necessary to extract the fundamental wave component and construct the fundamental wave atomic library In the formula:

[0059] f 1 is the fundamental frequency, is the fundamental phase, t s1 Indicates the start time of the fundamental wave, t e1 Indicates the end moment of the fundamental wave; u(t) is the unit step function...

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 synchronous motor parameter identification method based on an atom decomposition method. The method comprises the steps as follows: 1) constructing a related atom library and continuing an atom discretization parameter; 2) rapidly extracting fundamental current, direct current and frequency multiplication current from sudden short-circuit current of a synchronous motor with an evolution matching pursuit algorithm; 3) calculating a synchronous motor parameter from each decomposed atom signal characteristic parameter. The method has the benefits as follows: in order to solve the defects of traditional algorithms, particularly the poor decomposition effect of adopted EMD (empirical mode decomposition) and Prony algorithms on noise-containing signal short-circuit current and the poor anti-noise performance, the algorithm can extract the synchronous motor parameter accurately and has better anti-noise performance.

Description

technical field [0001] The invention relates to a parameter identification method of a synchronous motor based on an atomic decomposition method, and belongs to the technical field of signal processing. Background technique [0002] Accurate parameter identification of synchronous motor is of great significance to the research and analysis of power system operation and design of control system. Among them, the transient parameters reflecting the transient process of the synchronous motor are closely related to the selection of power equipment, the calculation of the stability of the power system, and the calculation of faults. [0003] The method for measuring synchronous motor parameters recommended by GB / T1029-2005 is the three-phase sudden short circuit method, which extracts the periodic component and aperiodic component through the upper and lower envelopes of the short circuit current. This method of data processing results in large errors in obtaining transient param...

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): H02P23/14H02P25/022H02P6/00H02P9/00H02P103/20
CPCH02P9/00H02P23/14H02P2103/20H02P2207/05
Inventor 倪良华肖李俊历馨
Owner NANJING INST OF TECH
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