Results 11 to 20 of about 1,044,967 (248)
Energies, 2017 Considering the effect of the utility harmonic impedance variations on harmonic responsibility, a method based on piecewise bound constrained optimization is proposed in this paper to evaluate the load harmonic responsibilities.
Tianlei Zang +5 more
doaj +2 more sources
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
doaj +1 more source
Solution technology of system side harmonic variable impedance based on minimum norm
电力工程技术, 2023 To calculate the harmonic impedance on the system side is crucial for the safe and stable operation of the new power system. Existing algorithms for harmonic impedance estimation usually assume that the harmonic impedance on the system side is constant ...
XU Fangwei +3 more
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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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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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IEEE Journal of Solid-State Circuits, 2021 In this article, a distributed-swing-boosting and harmonic-impedance-expanding multi-core oscillator is proposed to achieve low phase noise and high figure-of-merit (FoM), simultaneously. First, a distributed-coupling multi-core topology is introduced to
Yiyang Shu, H. Qian, Xiang Gao, Xun Luo
semanticscholar +1 more source
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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Impact of Modern Electronic Equipment on the Assessment of Network Harmonic Impedance
IEEE Transactions on Smart Grid, 2017 Diptargha Chakravorty +2 more
exaly +2 more sources
Impedance Characteristics and Harmonic Analysis of LCL-Type Grid-Connected Converter Cluster
Energies, 2022 This study addresses the output impedance model of the LCL-type grid-connected converter considering the dead-time effects and the digital control delay.
Xiaojie Zhou, Dezhi Xu, Yourui Huang
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Quantitative Analysis of the Interactive Influence for Harmonic Emission in Wind Farms
Frontiers 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
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