Results 11 to 20 of about 72,328 (282)
Energies, 2018 Utility harmonic impedance is an important parameter for harmonic mitigation. In this paper, a method for utility harmonic impedance estimation method based on constrained independent component analysis is proposed.
Xianyong Xiao +4 more
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Online Estimation of Cable Harmonic Impedance in Low-Voltage Distribution Systems [PDF]
IEEE Transactions on Instrumentation and Measurement, 2020 Incorrect values of cable harmonic impedance can lead to wrong conclusions when assessing impact of current distortion on the power network. A theoretical derivation of resistance and reactance for harmonic frequencies is not sufficient as it neglects operating conditions of cables as well as their configuration and actual installation pattern. In this
Stanislav Babaev +3 more
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Utility harmonic impedance estimation based on mutual information and data optimization
电力工程技术, 2023 Accurate calculation of harmonic impedance is the premise of harmonic control and reasonable division of harmonic responsibility. The existing harmonic impedance estimation methods should meet the conditions that the background harmonic fluctuations are ...
XU Fangwei +5 more
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Harmonic impedance estimation in frequency deviation scenario
2018 18th International Conference on Harmonics and Quality of Power (ICHQP), 2018 Harmonic impedance is an important parameter for electrical power system analyses. This parameter can be used in some important application such as island and resonance detection. The methods used for impedance estimation can be separated in two categories: invasive and noninvasive methods.
Henrique L. M. Monteiro +5 more
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Wind Farm Harmonic Impedance Estimation Based on Stochastic Subspace Method
IOP Conference Series: Earth and Environmental Science, 2019 Abstract Wind farm harmonic impedance is important parameter of wind farm. It has an important influence on stability calculation, stability analysis and stability assessment. To solve this problem that wind farm harmonic impedance is considered as static parameter, an assessment method of wind farm harmonic impedance based on output ...
Chunlei Jiao +4 more
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A harmonic impedance estimation method based on AR model and Burg algorithm
Electric Power Systems Research, 2022 Abstract With the development of smart grid, a lot of nonlinear loads and new energy power stations are connected into the power network. There are a large number of harmonic sources in the power grid, harmonic distortion has become one of the main power quality concerns in recent years.
Qin Shu +4 more
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A novel method for estimating utility harmonic impedance based probabilistic evaluation [PDF]
IET Generation, Transmission & Distribution, 2022 Here, a novel method for estimating utility harmonic impedance (UHI) based on probabilistic evaluation is proposed. By analysing harmonic data, it is determined that UHI tends to obey a particular distribution, that varies with the amplitude of the ...
Xianyong Xiao +3 more
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A comparison of typical non-invasive method for utility harmonic impedance estimation [PDF]
2018 18th International Conference on Harmonics and Quality of Power (ICHQP), 2018 The proliferation of power electronic equipment brings lots of problems to the power system, one of them is harmonic. Harmonic impedance is an essential parameter to evaluate the harmonic emission level and distinguish the harmonic responsibility when the harmonic level exceeds planning levels. At present, there are a lot of methods to estimate utility
Xian Zheng +4 more
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Estimating stiffness and damping of a novel variable impedance actuator based on adjusting viscoelastic properties of thermoresponsive polycaprolactone in harmonic motions [PDF]
Scientific ReportsThis paper presents a methodology to estimate the stiffness and damping of a novel variable impedance actuator designed to adjust its effective impedance by regulating the temperature of a thermoresponsive polymer, Polycaprolactone (PCL).
Trevor Exley +2 more
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Novel estimation method of utility harmonic impedance based on short‐term impedance minimum variance criterion [PDF]
IET 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). The existing estimation methods generally consider that the utility harmonic impedance is constant, which causes the estimation error and fail in tracking of impedance fluctuations, since the ...
Qin Shu, Siliang Zhao, Fangwei Xu
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