Results 21 to 30 of about 1,002,790 (325)

The optimal passive filters to minimize voltage harmonic distortion at a load bus [PDF]

open access: yes, 2005
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted.
Zobaa, AF
core   +1 more source

Quantitative Analysis of the Interactive Influence for Harmonic Emission in Wind Farms

open access: yesFrontiers in Energy Research, 2022
In the process of integrating large-scale wind farms into the power system, the harmonic interaction among wind farms causes potential safe and stable operation threats to the power grid.
Jinhui Shi   +4 more
doaj   +1 more source

Voltage harmonic reduction for randomly time-varying source characteristics and voltage harmonics [PDF]

open access: yes, 2006
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted.
Zobaa, AF
core   +1 more source

A Wilkinson Power Divider with Harmonic Suppression and Size Reduction using High-low Impedance Resonator Cells [PDF]

open access: yes, 2015
A miniaturized Wilkinson power divider using high-low impedance resonator cells are designed and fabricated. The proposed power divider occupies 23.7% of the conventional structure circuit area at the operating frequency of 0.9 GHz and it is also able to
Abdipour, A., Abdipour, A., Hayati, M.
core   +2 more sources

Magnitude-Reshaping Strategy for Harmonic Suppression of VSG-Based Inverter Under Weak Grid

open access: yesIEEE Access, 2020
Driven by inertial demand from the grid, the virtual synchronous generators (VSGs) are widely utilized in distributed generation systems. However, harmonic sources in the distributed generation systems with high grid impedance will cause grid voltage ...
Wen Yang   +3 more
doaj   +1 more source

Active Filter Reference Calculations Based on Customers’ Current Harmonic Emissions

open access: yesEnergies, 2021
This paper deals with harmonics compensation in industrial and distribution networks using an active filter (AcF). When defining the AcF’s reference current, it is important to properly consider the network background harmonic distortion.
Aljaž Špelko   +3 more
doaj   +1 more source

Novel estimation method of utility harmonic impedance based on short‐term impedance minimum variance criterion

open access: yesIET Generation, Transmission & Distribution, 2020
For harmonic control of a power grid, it is prerequisite to accurately estimate and follow the utility harmonic impedance at the point of common coupling (PCC).
Qin Shu, Siliang Zhao, Fangwei Xu
semanticscholar   +1 more source

Novel Sub-Harmonic Injection-Locked Balanced Oscillator [PDF]

open access: yes, 2001
A novel sub-harmonic injection-locked balanced oscillator is proposed. The circuit provides two outputs with a 180° ° phase difference by employing a transmission line section for impedance transformation to meet the oscillation conditions.
Chongcheawchamnan, M.   +2 more
core   +1 more source

A Harmonic Impedance Estimation Method Based on the Cauchy Mixed Model

open access: yesMathematical Problems in Engineering, 2020
In this paper, a new method without any tradition assumption to estimate the utility harmonic impedance of a point of common coupling (PCC) is proposed.
Zhirong Tang   +4 more
semanticscholar   +1 more source

Optimal passive filter design for effective utilization of cables and transformers under non-sinusoidal conditions [PDF]

open access: yes, 2014
Transformers and cables have overheating and reduced loading capabilities under non-sinusoidal conditions due to the fact that their losses increases with not only rms value but also frequency of the load current.
Aleem, SHEA   +3 more
core   +1 more source

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