Results 41 to 50 of about 201 (163)

A Disturbed Grid Voltage Interharmonic Analysis with Fourier Series of Several Variables

Mìkrosistemi, Elektronìka ta Akustika, 2020
Increasing the range of electronic devices, especially nonlinear impulse loads worsen the parameters of electricity quality. One of the most negative factors for the electricity quality are low-frequency interharmonics, which have a negative impact on ...
Evgenii Volodymyrovych Verbytskii
doaj   +1 more source

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

Monitoring and Suppression Strategies of the Interharmonic in the Grid-Connected Photovoltaic System: A Review

Energies
With the continuous advancement of the green and low-carbon transformation of energy structures in countries around the world, renewable energy sources such as solar energy are receiving increasingly widespread attention.
Mingxuan Mao, Yuhao Tang, Jiahan Chen, Zhao Xu, Haojin Sun, Chengqi Yin   +5 more
doaj   +1 more source

Impact of voltage subharmonics and interharmonics on currents in single-phase induction motors

Scientific Journal of Gdynia Maritime University, 2021
In very low power drives, a single-phase induction motor is used. This motor, like the 3-phase induction squirrel-cage motor, requires a voltage supply with suitable parameters – of suitable quality, in practice.
Marcin Pepliński
doaj   +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

Evaluation of Voltage Transformers’ Accuracy in Harmonic and Interharmonic Measurement

IEEE Open Journal of Instrumentation and Measurement, 2022
The measurement of Power Quality (PQ), generally performed at Low Voltage (LV) level, is gaining more and more importance also at the Medium Voltage (MV) level, due to the increasing presence of switching power converters (both loads or generators ...
Gabriella Crotti, Giovanni D'Avanzo, Carmine Landi, Palma Sara Letizia, Mario Luiso   +4 more
doaj   +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

Power Consumption Analysis of Electrical Installations at Healthcare Facility

Energies, 2017
This paper presents a methodology for power consumption estimation considering harmonic and interharmonic content and then it is compared to the power consumption estimation commonly done by commercial equipment based on the fundamental frequency, and ...
Emmanuel Guillen-Garcia, Angel L. Zorita-Lamadrid, Oscar Duque-Perez, Luis Morales-Velazquez, Roque Alfredo Osornio-Rios, Rene de Jesus Romero-Troncoso   +5 more
doaj   +1 more source

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

Modeling and Nonlinear Dynamic of Dual‐Rotor System With Misalignment During Aircraft Climbing Flight

Shock and Vibration, Volume 2026, Issue 1, 2026.
Misalignment of the dual‐rotor system in aeroengines may lead to abnormal vibration and rubbing faults between the rotor and the stator. The dynamic model of the dual‐rotor system with misalignment during aircraft climbing flight is presented in this paper. The dynamic equation of the dual‐rotor system is obtained from the Lagrange equation.
Guofang Nan, Jinrui Hu, Jingya Yao, Chen Zhang, Bodong Zhang, Antonio Giuffrida   +5 more
wiley   +1 more source