Measuring Principle Research on Fundamental Wave of Grid Based on Curve Fitting Model

Authors

Liyun Liu, 1. Department of Electron Information Engineer, Loudi College of Vocational & Technical, Loudi 417000, China;;
Zhezhao Zeng, 2. School of Electric and Information Engineering, Changsha University of Science and Technology, Changsha 410014, China;

Abstract

Abstract: Measuring principle of grid fundamental wave based on algebraic polynomial model is proposed. Its main idea is to optimize parameters of algebraic polynomial model so as to accurately fit the power grid fundamental wave signal to be measured based on the recursive least squares (RLS), and then the steepest descent method was adopted to iteratively calculate zeros of the fitting polynomial model, and then fundamental frequency was obtained according to time difference of the adjacent two zeros. Fundamental wave amplitude could be obtained according to the fitting model values corresponding to the middle of the adjacent two zero points. Finally, initial phase of the fundamental wave could be obtained by the first sample data. Simulation results show that the method proposed is an effective detection method, which has very high detection accuracy and strong noise immunity ability.

Recommended Citation

Liu, Liyun and Zeng, Zhezhao (2020) "Measuring Principle Research on Fundamental Wave of Grid Based on Curve Fitting Model," Journal of System Simulation: Vol. 28: Iss. 11, Article 22.
DOI: 10.16182/j.issn1004731x.joss.201611022
Available at: https://dc-china-simulation.researchcommons.org/journal/vol28/iss11/22

First Page

2798

Revised Date

2016-03-01

DOI Link

https://doi.org/10.16182/j.issn1004731x.joss.201611022

Last Page

2804

CLC

TM935

Recommended Citation

Liu Liyun, Zeng Zhezhao. Measuring Principle Research on Fundamental Wave of Grid Based on Curve Fitting Model[J]. Journal of System Simulation, 2016, 28(11): 2798-2804.

DOI

10.16182/j.issn1004731x.joss.201611022