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Harmonic mitigation potential of shunt harmonic impedances [PDF]
Electric Power Systems Research, 2003 Abstract Although complete compensation is only possible using true active filters, shunt harmonic impedances (SHI) have been shown to provide a considerable reduction of the harmonic propagation. In this paper, the mitigation potential of different SHI is investigated, together with their VA-rating. It is shown that a resistive impedance of 1 pu for
Ryckaert, Wouter +2 more
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Research on Calculation Method of Harmonic Impedance [PDF]
Proceedings of the 2017 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017), 2017 Xiao-Long Xu
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Experimental assessment of harmonic contributions using a ternary pulse sequence [PDF]
Serbian Journal of Electrical Engineering, 2021 Harmonic contributions of utility and customer may feature significant variations due to network switchings and changing operational modes. In order to correctly define the impacts on the grid voltage distortion the frequency dependent impedance
Bulycheva Evgeniia, Yanchenko Sergey
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IEEE Access, 2022 Accurate estimation of the utility harmonic impedance is significant for harmonic control and responsibility division. Traditional methods of estimating the utility harmonic impedance are valid on the premise that the harmonic impedance on the wind-farm ...
Runze Zhou +4 more
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Harmonic impedance assessment using prevailing phasors [PDF]
2018 18th International Conference on Harmonics and Quality of Power (ICHQP), 2018 In accordance with the IEC 61000-3-6, the evaluation of the harmonic emissions requires an accurate harmonic impedance representation of the system. However, the assessment of a harmonic impedance is understood to be a very complex problem and that the available methods are not entirely satisfactory.
Serfontein, Duan +2 more
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Zhongguo dianli, 2021 With the extensive application of photovoltaic inverter, the harmonic generated during its operation overlaps with the background harmonic of the system at the access point, which causes harmonic amplification and even resonance problems. It is therefore
Xu ZHANG +4 more
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The effect of inrush transients on pv inverter's grid impedance measurement based on inter-harmonic injection [PDF]
, 2010 This paper addresses a cause for false tripping of photovoltaic inverters with antiislanding protection based on impedance measurement with inter-harmonic injection. Earlier discussions about tripping problems happening when several devices are doing the
Bhattacharyya, S. +5 more
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Study on the Estimation of Utility Harmonic Impedance Based on Minimum Norm of Impedance Difference
IEEE Access, 2020 The existing methods for estimating harmonic impedance usually assume that harmonic impedance is constant in a measurement period. However, for a variety of practical reasons, such as the load change of power grid, utility harmonic impedance may be ...
Fangwei Xu +5 more
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Assessment on Harmonic Emission Level of Residential Loads with Symmetry and Volatility Constraints
Zhongguo dianli, 2020 The accuracy of harmonic emission level assessment of residential loads is affected by background harmonics or three-phase harmonic unbalance. Based on Norton’s and Davinan’s theorem, a model is constructed for assessment of harmonic emission level.
Huaying ZHANG +5 more
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Energies, 2022 There are a huge number of harmonics in the railway power supply system. Accurately estimating the harmonic impedance of the system is the key to evaluating the harmonic emission level of the power supply system. A harmonic impedance estimation method is
Yankun Xia, Wenzhang Tang
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