Results 21 to 30 of about 1,044,967 (248)

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

IEEE 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, Mingyu Wang, Saddam Aziz, Ali Yousaf Kharal   +3 more
doaj   +1 more source

Active Filter Reference Calculations Based on Customers’ Current Harmonic Emissions

Energies, 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, Boštjan Blažič, Igor Papič, Leopold Herman   +3 more
doaj   +1 more source

A Novel Modulation-Based Current Harmonic Control Strategy for PMSM Considering Current Measurement Error and Asymmetric Impedance

IEEE Access, 2022
The permanent magnet synchronous machines system includes various harmonics caused by asymmetric impedance, current measurement errors, spatial harmonics, and inverter nonlinearity. The asymmetric impedance and the current measurement scaling error cause
Hao Lin, Yong Liao, Luocheng Yan, Fu Li, Yixiao Feng   +4 more
doaj   +1 more source

A New Method to Calculate the Utility Harmonic Impedance Based on FastICA

IEEE Transactions on Power Delivery, 2016
Honggeng Yang
exaly   +2 more sources

Train Impedance Reshaping Method for Suppressing Harmonic Resonance Caused by Various Harmonic Sources in Trains-Network Systems With Auxiliary Converter of Electrical Locomotive

IEEE Access, 2019
With the development of electrified railway, harmonic resonance accidents occur from time to time. Based on the mechanism of resonance, a harmonic resonance suppression radical method by impedance reshaping is proposed.
Shihui Liu, Fei Lin, Xiaochun Fang, Zhongping Yang, Zhiwei Zhang   +4 more
doaj   +1 more source

Dynamic Impedance Estimation: Challenges and Considerations

Applied Sciences, 2021
The objective of this paper was to examine the dynamic impedance estimation of electrical systems from online measurements. The paper makes several considerations and highlights the challenges to obtain a precise estimation.
Mateus M. de Oliveira, Renato R. Aleixo, Denise F. Resende, Leandro R. M. Silva, Rafael S. Salles, Carlos A. Duque, Paulo F. Ribeiro   +6 more
doaj   +1 more source

A Harmonic Impedance Estimation Method Based on the Cauchy Mixed Model

Mathematical 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, Huaqiang Li, Fangwei Xu, Qin Shu, Yue Jiang   +4 more
semanticscholar   +1 more source

Improved utility harmonic impedance measurement based on robust independent component analysis and bootstrap check

, 2020
In this study, a new method for utility harmonic impedance measurement based on robust independent component analysis (RICA) and bootstrap check is proposed.
Fei-Yu Chen, Nanping Mao, Yang Wang, Ying Wang, Xianyong Xiao   +4 more
semanticscholar   +1 more source

Online Estimation of Cable Harmonic Impedance in Low-Voltage Distribution Systems

IEEE Transactions on Instrumentation and Measurement, 2020
Incorrect values of cable harmonic impedance can lead to wrong conclusions when assessing an impact of current distortion on the power network. A theoretical derivation of resistance and reactance for harmonic frequencies is not sufficient as it neglects
S. Babaev, S. Cobben, V. Ćuk, H. E. van den Brom   +3 more
semanticscholar   +1 more source

Utility harmonic impedance estimation based on time series clustering and improved Pettitt method

International Journal of Electrical Power & Energy Systems
Utility harmonic impedance estimation is critical for power quality assessment and improvement. Noninvasive methods without injecting harmonics are widely adopted to estimate utility harmonic impedance using natural load variations.
Wentao Li, Shunliang Wang, Hao Tu, Hong Miao, Ning Jiao, Tianqi Liu   +5 more
doaj   +1 more source