Results 41 to 50 of about 946 (192)

Estimation of Electric Power Quantities for Nonsinusoidal Conditions Based on Operating Point Fluctuations

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This paper proposes an operating point fluctuations (OPF) framework to describe nonsinusoidal, nonstationary waveforms by modeling distortions as amplitude and phase fluctuations of a time‐varying fundamental component. Based on OPF, single‐phase and three‐phase power quantity expressions consistent with IEEE Std. 1459–2025 are derived under stationary
Yang Li, Guobing Song, Yiming Ren, Yuxuan Zhang   +3 more
wiley   +1 more source

Comparisons of the execution times and memory requirements for high-speed discrete fourier transforms and fast fourier transforms, for the measurement of AC power harmonics [PDF]

, 2011
Conventional wisdom dictates that a Fast Fourier Transform (FFT) will be a more computationally effective method for measuring multiple harmonics than a Discrete Fourier Transform (DFT) approach.
Burt, G. M., Roscoe, A. J.
core   +3 more sources

Harmonic and Interharmonic Measurement Method Using Two-Fold Compound Convolution Windows and Zoom Fast Fourier Transform

Energies
With the rapidly increasing penetration of new energy resources, the power grid faces significant threats from harmonics. To measure and suppress these harmonics, numerous harmonic measurement methods have been proposed.
Xiangui Xiao, Lei Zhao, Shengjun Zhou, Haijun Liu, Zhong Fu, Dan Hu   +5 more
doaj   +1 more source

STUDY OF ELECTROMAGNETIC TORQUE PULSATIONS IN PRECISION SERVO DRIVES WITH SINUSOIDAL PULSE-WIDTH MODULATION [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2019
Subject of Research.The paper considers the factors for reducing the pulsations of the electromagnetic torque in a precision instrumental electric drive with sinusoidal pulse-width modulation based on a permanent magnet synchronous motor.
V. S. Tomasov , A. A. Usoltsev, D. A. Vertegel, K. M. Denisov   +3 more
doaj   +1 more source

Impact of Solar Radiation on Luminaires and Energy Efficiency in Isolated Residential Photovoltaic Systems

Buildings, 2023
This research centers on the implementation of photovoltaic systems in residential applications, coupled with battery-based energy storage, and evaluates their efficiency in generating energy, specifically for lighting in buildings.
Jaime Jalomo-Cuevas, Fabiola Colmenero Fonseca, Javier Cárcel-Carrasco, Sergio Sandoval Pérez, Alberto Gudiño-Ochoa   +4 more
doaj   +1 more source

Sources, Effects, and Modelling of Interharmonics [PDF]

Mathematical Problems in Engineering, 2014
Recently, the increasing use of power electronic systems and time‐variant nonlinear loads has brought number of power harmonics/interharmonics, and the power supply quality is therefore seriously threatened. The presence of interharmonics strongly poses more difficulties in modelling and measuring the distorted waveforms. Therefore, this paper reviews
openaire   +1 more source

A Stability Enhancement Method for Grid‐Forming Inverters With Inductor Current Feedforward and Coupling‐Enhancing Control

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
A sequence impedance model of grid‐forming inverters is developed; a grid‐forming inverter's stabilisation strategy combining inductor current feedforward and coupling‐enhancing techniques is presented for strong‐grid applications. ABSTRACT Although the stable operation of grid‐forming inverters (GFMIs) in weak grids is well‐documented, undesirable ...
Xu Wu, Huafeng Xiao, Mingming Shi, Cunwen Tang, Wei Wang, Ming Cheng   +5 more
wiley   +1 more source

A Synchrophasor Estimation Method for Distribution Networks Using Sliding Fourier Transform and Parameter Residual Minimization

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Synchrophasor estimation in distribution networks faces significant challenges under complex signal conditions, such as frequency deviation, harmonic distortion, and nonstationary disturbances. To address these issues, an adaptive state estimation algorithm combining the sliding Fourier transform (SFT) and a spectrum‐driven estimation via minimization ...
Zengji Liu, Junjun Xu, Tengfei Zhang, Yeyi Ji, Qi Wang, Cheng Du   +5 more
wiley   +1 more source

A Two-Stage ADALINE for Harmonics and Interharmonics Measurement [PDF]

, 2010
[[abstract]]Abstract—Harmonics and interharmonics may introduce operational problems in electrical and electronic equipment. Therefore, monitoring harmonics/interharmonics for improving the power quality is of importance for both electric utilities and ...
G. W. Chang;C. I Chen;Q. W. Liang
core  

PolarDoG–SlimVGG: A Novel Complex Power Quality Disturbance Classification Framework Based on Polar Coordinate Edge Detection and Attention‐Enhanced Convolutional Neural Network

Journal of Electrical and Computer Engineering, Volume 2026, Issue 1, 2026.
This study introduces PolarDoG–SlimVGG, a novel framework for the automated classification of complex quadruple power quality disturbances (PQDs). The proposed method combines PolarDoG, a feature extraction technique based on polar coordinate transformation and difference of Gaussians (DoG) edge detection, with a lightweight convolutional neural ...
Supakan Janthong, Pornchai Phukpattaranont, Prince Jain   +2 more
wiley   +1 more source