A Rotor Speed Based Time-varying Window for Harmonic Analysis of DFIG

2015 ◽  
Author(s):  
Junbo Sun ◽  
Haoxiang Chu ◽  
Da Xie
Keyword(s):  
Harmonic Analysis ◽  
Time Varying ◽  
Rotor Speed

A Virtual instrument for Time Varying Harmonic Analysis

2016 ◽  
Author(s):  
Carlos Henrique Martins ◽  
Henrique Luis Moreira Monteiro ◽  
Mateus Mostaro de Oliveira ◽  
Leandro Rodrigues Manso Silva ◽  
Carlos Augusto Duque ◽  
...  
Keyword(s):  
Harmonic Analysis ◽  
Virtual Instrument ◽  
Time Varying

scholarly journals Time-varying harmonic analysis in electric power systems with wind farms, through the possibility theory

DYNA ◽  
2015 ◽  
Vol 82 (192) ◽  
pp. 185-194 ◽  
Author(s):  
Andrés Arturo Romero-Quete ◽  
Gastón Orlando Suvire ◽  
Humberto Cassiano Zini ◽  
Giuseppe Rattá
Keyword(s):  
Harmonic Analysis ◽  
Electric Power ◽  
Wind Turbines ◽  
Wind Farms ◽  
Load Flow ◽  
Electric Power System ◽  
Harmonic Load ◽  
Time Varying ◽  
Nonlinear Load ◽  
Modeling Uncertainties

<p>This paper focuses on the analysis of the connection of wind farms to the electric power system and their impact on the harmonic load-flow. A possibilistic harmonic load-flow methodology, previously developed by the authors, allows for modeling uncertainties related to linear and nonlinear load variations. On the other hand, it is well known that some types of wind turbines also produce harmonics, in fact, time-varying harmonics. The purpose of this paper is to present an improvement of the former method, in order to include the uncertainties due to the wind speed variations as an input related with power generated by the turbines. Simulations to test the proposal are performed in the IEEE 14-bus standard test system for harmonic analysis, but replacing the generator, at bus two, by a wind farm composed by ten FPC type wind turbines.</p>

Digital prolate spheroidal window-based S-transform for time-varying harmonic analysis

2020 ◽  
Vol 187 ◽  
pp. 106512
Author(s):  
Jianmin Li ◽  
Haijun Lin ◽  
Zhaosheng Teng ◽  
Fu Zhang ◽  
Chengbin Liang
Keyword(s):  
Harmonic Analysis ◽  
Time Varying ◽  
Prolate Spheroidal ◽  
S Transform

scholarly journals Robust Estimation-Based Control Strategies for Induction Motors

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Florin Stîngă ◽  
Marius Marian ◽  
Dan Selișteanu
Keyword(s):  
Robust Control ◽  
Closed Loop ◽  
Induction Motors ◽  
Control Strategies ◽  
Industrial Applications ◽  
Time Varying ◽  
Rotor Speed ◽  
Output Variable ◽  
Adaptive Technique ◽  
System Variables

This work proposes a realistic solution to the control problem of sensorless induction motors. Due to some important aspects related to their construction and reliability, the induction motors are extensively used in many modern industrial applications. Considering that the system is facing the lack of hardware sensors, the proposed complex control strategies are based on the estimation of unavailable system variables and parameters. In order to control the rotor speed, two robust control strategies are proposed: a modified super-twisting adaptive technique and a model predictive technique. The tests performed under several practical assumptions show that the closed loop behaviour of the system is adequate, and the output variable follows the imposed time varying reference, despite the considered uncertainties and disturbances acting on the process.

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