Results 261 to 270 of about 72,328 (282)
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IEEE transactions on industrial electronics (1982. Print), 2023
Low-voltage distribution grids face substantial challenges in terms of power quality, efficiency, and grid utilization that can affect both utilities and consumers.
A. Charalambous +2 more
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Low-voltage distribution grids face substantial challenges in terms of power quality, efficiency, and grid utilization that can affect both utilities and consumers.
A. Charalambous +2 more
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A real time implementation of an harmonic impedance estimator
2016 17th International Conference on Harmonics and Quality of Power (ICHQP), 2016Harmonic impedance is an important parameter for electrical power system analyses. This parameter can be applied in some important application such as island and resonance detection. This work presents an impedance estimation technique implemented in real time.
Henrique Luis Moreira Monteiro +4 more
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IEEE Transactions on Power Delivery, 2020
The existing methods estimating utility harmonic impedance usually require some assumptions such as the utility side is the dominant harmonic source and the harmonic impedance of customer side is much larger than that of the utility side, etc. However, these assumptions may not always hold in modern power grid.
Qin Shu +3 more
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The existing methods estimating utility harmonic impedance usually require some assumptions such as the utility side is the dominant harmonic source and the harmonic impedance of customer side is much larger than that of the utility side, etc. However, these assumptions may not always hold in modern power grid.
Qin Shu +3 more
openaire +1 more source
IEEE transactions on power electronics, 2021
As a key parameter in microgrids, feeder impedance is closely related to power distribution, power quality, and system stability. This letter proposes a novel noninvasive feeder impedance estimation method, which uses the microgrid central controller ...
Baojin Liu, Zeng Liu, Jinjun Liu
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As a key parameter in microgrids, feeder impedance is closely related to power distribution, power quality, and system stability. This letter proposes a novel noninvasive feeder impedance estimation method, which uses the microgrid central controller ...
Baojin Liu, Zeng Liu, Jinjun Liu
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A Variable Harmonic Impedance Estimation Method Based on Improved BP Neural Network
2025 6th International Conference on Energy Power and Automation Engineering (ICEPAE)In response to the challenges of identifying variable harmonic impedance caused by changes in grid operation, capacitor switching, and other factors, this paper proposes a back propagation (BP) neural network method combined with an attention mechanism ...
Xiang Chen +3 more
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Estimation of supply side harmonics by using network impedance data
2010 Joint International Conference on Power Electronics, Drives and Energy Systems & 2010 Power India, 2010Separation of contribution from supply side and customer side in generation of harmonics in power system is an important problem to be addressed. This paper presents a method to estimate the harmonics present in the supply side by making a few measurements at the point of common coupling.
Francis M. Fernandez +1 more
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Uncertainty estimation in noninvasive measurement of harmonic impedance - Laboratory studies
2015 International School on Nonsinusoidal Currents and Compensation (ISNCC), 2015In the paper a method for the estimation of uncertainty of harmonic impedance measurement is proposed and validated. The validation is conducted using signals originating from the laboratory model of a grid of a known harmonic impedance, by the analysis of the histograms of estimated harmonic impedances. The results show that the proposed method can be
D. Borkowski, A. Wetula, J. Kowalski
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Impedance Estimation and the Total Harmonic Distortion Methods for Islanding Detection
2012 International Conference on Renewable Energy Research and Applications (ICRERA), 2012An islanding situation should be detected accurately soon after the island is formed. Because failure to trip the islanded distributed resource can lead to a number of problems for the resource and the connected load. Therefore, it is important to distinguish islanding and non-islanding situations and block the nuisance tripping effectively. This paper
Bohan Liu, Ke Jia
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Estimation of power supply harmonic impedance using a controlled voltage disturbance
2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230), 2002A novel method for power system impedance estimation is presented. The method employs a power converter to inject a voltage transient onto the supply system. The impedance is estimated through correlation of the measured voltage and current transients. Simulations and experimental results demonstrate the effectiveness of this measurement technique.
M. Sumner +4 more
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Estimation of Higher Frequency Network Equivalent Impedances by Harmonic Analysis Natural Waveforms
IEEE Transactions on Power Apparatus and Systems, 1978A digital method of analysing harmonics in a power system has been developed which permits the equivalent network impedance to be estimated by means of the switching of capacitor banks. The method records voltage and current digitally and by data processing computes the amplitude and phase of the harmonics.
Daniel Crevier, Andre Mercier
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