Results 11 to 20 of about 200,390 (295)

Evaluation of Harmonic Contributions for Multi Harmonic Sources System Based on Mixed Entropy Screening and an Improved Independent Component Analysis Method

open access: yesEntropy, 2020
Evaluating the harmonic contributions of each nonlinear customer is important for harmonic mitigation in a power system with diverse and complex harmonic sources.
Jinshuai Zhao   +3 more
doaj   +1 more source

Interaction Mechanism for Multiple Active Power Filters in DC Distribution Networks

open access: yesShanghai Jiaotong Daxue xuebao, 2023
DC distribution network is the main development direction of the power distribution system. Due to the influence of electronic equipment and other factors, the system is very easy to produce second harmonics, which seriously affects the stability of the ...
WANG Hao, HUANG Wentao, TAI Nengling, YU Moduo, SUN Guoliang
doaj   +1 more source

Study and analysis of the propagation of harmonics in electrical grid connected photovoltaic system

open access: yesDiagnostyka, 2023
Renewable energy sources especially solar energy connected to an electrical grid system by using power electronic devices, known that devices degrade the power quality and especially generate harmonic currents.
Yacine Djeghader   +2 more
doaj   +1 more source

Using Pitch, Amplitude Modulation, and Spatial Cues for Separation of Harmonic Instruments from Stereo Music Recordings

open access: yesEURASIP Journal on Advances in Signal Processing, 2007
Recent work in blind source separation applied to anechoic mixtures of speech allows for improved reconstruction of sources that rarely overlap in a time-frequency representation.
Bryan Pardo, John Woodruff
doaj   +2 more sources

Fast Bus Voltage Control of Single-Phase Grid-Connected Converter With Unified Harmonic Mitigation

open access: yesIEEE Access, 2023
This paper presents a comprehensive analysis of the harmonic sources of the single-phase grid-connected voltage source converter (VSC), which leads to an alternative approach for DC bus voltage control of the VSC under grid voltage distortion with a ...
Akekachai Pannawan   +3 more
doaj   +1 more source

Mixed pixel return separation for a full-field ranger [PDF]

open access: yes, 2008
Full-field amplitude modulated continuous wave range imagers commonly suffer from the mixed pixel problem. This problem is caused by the integration of light from multiple sources by a single pixel, particularly around the edges of objects, resulting in ...
Cree, Michael J.   +2 more
core   +2 more sources

Multiple Harmonic Current Injection System for Audible Noise Analysis of AC Filter Capacitors in Converter Stations

open access: yesIEEE Access, 2020
The audible noise of AC filter capacitors is one of the major noise sources in High Voltage Direct Current (HVDC) converter stations. In order to avoid the sharp noise of AC filter capacitors, it is necessary to design a Multiple Harmonic Current ...
Jingang Han   +5 more
doaj   +1 more source

Multi-Harmonic Source Localization Based on Sparse Component Analysis and Minimum Conditional Entropy

open access: yesEntropy, 2020
Aiming at the fact that the independent component analysis algorithm requires more measurement points and cannot solve the problem of harmonic source location under underdetermined conditions, a new method based on sparse component analysis and minimum ...
Yongzhen Du, Honggeng Yang, Xiaoyang Ma
doaj   +1 more source

Harmonic Instability Analysis of Single-Phase Grid Connected Converter using Harmonic State Space (HSS) modeling method [PDF]

open access: yes, 2015
The increasing number of renewable energy sources at the distribution grid is becoming a major issue for utility companies, since the grid connected converters are operating at different operating points due to the probabilistic characteristics of ...
Bak, Claus Leth   +3 more
core   +2 more sources

Harmonic vibration suppression for magnetically suspended flywheel with rotor unbalance and sensor runout

open access: yesAIP Advances, 2018
Rotor unbalance and sensor runout are the two major interference sources in magnetically suspended flywheel (MSF), which can induce undesirable harmonic vibration and reduce the attitude control precision of spacecraft.
Yang Zhang, Kun Liu, Zhizhou Zhang
doaj   +1 more source

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