Results 51 to 60 of about 29,133 (164)

Robust Inverter Synchronisation for Weak Grid Based on Impedance Estimation

Energies
The growing integration of distributed renewable energy resources interfaced with current power systems through electronic converters presents significant challenges for system monitoring, stability, control and protection.
Phuoc Sang Nguyen, Ghavameddin Nourbakhsh, Gerard Ledwich   +2 more
doaj   +1 more source

Online Active Impedance Estimation Method in an LCL-Grid-Tied VSI: Analysis of the Multisine Perturbation

IEEE Open Journal of Industry Applications
Accurate grid impedance estimation is essential for the stability and efficiency of modern power systems, especially with high renewable energy penetration.
Giovanni Marini, Giulia Di Nezio, Salvatore D'Arco, Alessandro Lidozzi, Marco di Benedetto, Luca Solero   +5 more
doaj   +1 more source

Design and analysis of virtual impedance control scheme based on MESOGI for improving harmonic sharing of nonlinear loads

Scientific Reports
Under the presence of nonlinear load, the most existing virtual impedance (VI) methods-based control solution performs poorly in reactive power sharing among droop-operated VSIs in microgrids (MGs).
Abdelhammid Kherbachi, Ahmed Bendib, Aissa Chouder, Hafiz Ahmed, Mohamed Benbouzid, Saad Motahhir   +5 more
doaj   +1 more source

Impedance Learning-Based Hybrid Adaptive Control of Upper Limb Rehabilitation Robots

Actuators
This paper presents a hybrid adaptive control strategy for upper limb rehabilitation robots using impedance learning. The hybrid adaptation consists of a differential updating mechanism for the estimation of robotic modeling uncertainties and periodic ...
Zhenhua Jiang, Zekai Wang, Qipeng Lv, Jiantao Yang   +3 more
doaj   +1 more source

Transformer rated capacity estimation based on multi-sequence impedance network

Frontiers in Energy Research
IntroductionThe inconsistency between the nameplate capacity and actual rated capacity of distribution transformers poses challenges for equipment management and operation.
Yang Minggui, Zhang Xindong, Lei Yuxing, Li Bo   +3 more
doaj   +1 more source

Harmonic impedance estimation based on improved rank estimation

Journal of Physics: Conference Series
Abstract In response to the issue of harmonic data anomalies affecting harmonic impedance estimation, a method based on improved rank regression is proposed, building upon the foundation of rank estimation. This method utilizes harmonic data sampled from the point of common coupling, treating harmonic impedance as regression parameters ...
Dianlang Wang, Jing Chen, Qi Yin, Hanlin Ding, Qingsong Liu, Hong Miao   +5 more
openaire   +1 more source

Online Estimation of Electrical Impedance

, 2014
In this paper, a method able to estimate and track the variations of a lithium ion battery impedance is presented. This algorithm relies on a recursive implementation of a wideband frequency estimation method based on Fourier trans-forms. Its estimation performance and tracking capability are tuned thanks to a unique parameter called the forgetting ...
Piret, Hélène, Granjon, Pierre, Cattin, Viviane, Guillet, Nicolas   +3 more
openaire   +1 more source

Gauss-Newton Method Applied to Impedance Estimation in Grid-Connected Inverters

Eletrônica de Potência
This work presents a methodology that employs the Gauss–Newton algorithm to perform online impedance estimation for grid-connected inverters. Conventional formulations for this class of problem typically lead to high-order nonlinear systems of equations,
Jefferson R. P. de Assis, Darlan A. Fernandes , Maurício B. de R. Corrêa, Alfeu J. Sguarezi Filho, Fabiano F. Costa, Edison R. C. da Silva   +5 more
doaj   +1 more source

A novel method for calculating harmonic contribution based on difference recurrence estimation

IET Generation, Transmission & Distribution
Determining the harmonic contribution of each harmonic source is conducive to improving the harmonic management of the power system. The main problem with harmonic contribution calculation is determining the equivalent system harmonic impedance.
Huichun Hua, Han Gao, Lijie Gao, Haichao Guo   +3 more
doaj   +1 more source

Assessing Linearity in Multi-Joint Upper Limb Dynamics Under Small Perturbations for Reliable Mechanical Impedance Estimation

IEEE Transactions on Neural Systems and Rehabilitation Engineering
This study investigates the linear behavior of multi-joint upper limb dynamics under small perturbations, a prerequisite for stochastic estimation of upper limb mechanical impedance, which is crucial for understanding motor control and has the potential ...
Seongil Hwang, Hyunah Kang, Sang Hoon Kang   +2 more
doaj   +1 more source