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Harmonic currents of finite energy and laminations [PDF]
GAFA Geometric And Functional Analysis, 2005 We introduce, on a complex Kahler manifold (M, ), a notion of energy for harmonic currents of bidegree (1,1). This allows us to define $\int T \wedge T \wedge ^{k-2},$ for positive harmonic currents. We then show that for a lamination with singularities of a compact set in P^2 there is a unique positive harmonic current which minimizes energy.
Fornæss, John Erik, Sibony, Nessim
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New conditions for applying surcharges (discounts) to electricity payments for generation and consumption of harmonic component currents [PDF]
E3S Web of Conferences, 2023 Technical means of suppression of harmonic component currents installed in the consumer's electric network are able to reduce the level of harmonic component currents and reduce the harmful effects of their flow.
Chikin Vladislav, Kuznetsov Anatoly
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Scientific African, 2023 It is well understood that geomagnetically induced currents (GICs) flow through the grounded neutrals of wye-connected transformers, generating harmonic currents that flow along frequency-dependent transmission lines.
David Oyedokun, Pitambar Jankee
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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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Energies, 2022 Matrix converters have many advantages, including high-efficiency, single-stage AC/AC energy conversion, bidirectional power flow, a near-unity input power factor, sinusoidal three-phase input currents, and sinusoidal three-phase output currents. However,
Tian-Hua Liu, Jia-Han Li
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Applied Sciences, 2020 In order to reach better results for pulse width modulation (PWM)-based methods, the reference waveforms known as control laws have to be achieved with good accuracy. In this paper, three control laws are created by considering the harmonic components of
Majid Mehrasa +4 more
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Suppression of Second-Order Harmonic Current for Droop-Controlled Distributed Energy Resource Converters in DC Microgrids [PDF]
, 2020 Droop-controlled distributed energy resource converters in dc microgrids usually show low output impedances. When coupled with ac systems, second-order harmonics typically appear on the dc-bus voltage, causing significant harmonic currents at the ...
Caldognetto, Tommaso +3 more
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Study of Winding Structure to Reduce Harmonic Currents in Dual Three-Phase Motor
World Electric Vehicle Journal, 2023 Dual three-phase motors have the problem of a large generation of harmonic currents while driving due to small inductance for certain harmonics. The purpose of this paper is to theoretically clarify the effect of the winding structure of dual three-phase
Akito Yoshida, Kan Akatsu
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IET Electric Power Applications, 2023 The vibration and noise of the permanent magnet synchronous motor (PMSM) is mainly caused by its electromagnetic force. Harmonic currents affect the vibration, and noise performance of PMSM by influencing its electromagnetic force.
Lixin Wang +3 more
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电力工程技术, 2022 The modular multilevel matrix converter (M3C) is the core equipment for fractional frequency transmission system (FFTS). The AC-AC conversion of M3C leads to direct coupling of the ac electrical quantities at different frequencies,causing complex ...
SUN Yuwei +5 more
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