Results 11 to 20 of about 74,380 (202)
Energy Reports, 2023 Unbalanced issues and power quality problems can be handled using shunt active power filters (APFs). Under weak grid conditions and unbalanced grid impedance, the unbalanced three-phase load leads to unbalanced grid currents and point-of-common-coupling ...
Mohammad Alathamneh +2 more
doaj +1 more source
IET Power Electronics, 2023 This paper investigates space‐vector‐modulation (SVM) technique that uses only rotating space vectors to drive a direct matrix converter (DMC) with zero common‐mode voltage (CMV).
Luka Stanić +3 more
doaj +1 more source
Control of Grid-Following Inverters Under Unbalanced Grid Conditions
IEEE Transactions on Energy Conversion, 2020 This paper proposes a new control scheme to eliminate the 3rd harmonic in the output currents of grid-following inverters under unbalanced grid conditions. Unbalanced grids adversely affect the performance of grid-following inverters due to the oscillations appearing on the DC-link voltage with a frequency twice the line frequency.
Seyed Fariborz Zarei +5 more
openaire +2 more sources
Online Parametric Estimation of Grid Impedance Under Unbalanced Grid Conditions [PDF]
Energies, 2019 Whereas power-electronics-based power systems are expected to enable more integration of renewable energy sources, they could pose crucial challenges including stability issues due to the Thévenin impedance seen by inverters. Such problems could be mitigated by enabling the inverters to estimate the grid impedance by including a grid impedance ...
Nabil Mohammed +2 more
openaire +1 more source
Energy Reports, 2022 The Vienna rectifier is an excellent Power Factor Correction (PFC) AC–DC converter which has low Total Harmonic Distortion (THD) of input current, resistance to high-voltage, and high efficiency.
Jianguo Lyu +3 more
doaj +1 more source
Improved DPC Strategy of Grid-connected Inverters under Unbalanced and Harmonic Grid Conditions [PDF]
Journal of international Conference on Electrical Machines and Systems, 2013 This paper presents an improved direct power control (DPC) strategy for grid-connected voltage source inverter (VSI) under unbalanced and harmonic grid voltage conditions. Based on the mathematic model of VSI with the negative sequence, 5th and 7th harmonic voltage components consideration, a PI controller is used in the proposed DPC strategy to ...
null Yongbo Shen, null Heng Nian
openaire +1 more source
Frontiers in Energy Research, 2022 Proportional–integral vector control (PIVC) has been proposed as an effective control strategy for modular multi-level converter (MMC) under balanced grid conditions.
Tianyi Guan +6 more
doaj +1 more source
Adaptive Vectorial Filter for Grid Synchronization of Power Converters Under Unbalanced and/or Distorted Grid Conditions [PDF]
, 2014 This paper presents a new synchronization scheme for detecting multiple positive-/negative-sequence frequency harmonics in three-phase systems for grid-connected power converters.
Carrasco Solís, Juan Manuel +4 more
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Control of DFIG based wind generation systems under unbalanced network supply [PDF]
, 2007 This paper develops a dynamic model and control scheme for DFIG systems to improve the performance and stability under unbalanced grid conditions. A dynamic DFIG model containing the positive and negative sequence components is presented using stator ...
Wang, Yi, Xu, L.
core +1 more source
Energy Reports, 2022 In the DC power distribution systems, One-cycle control (OCC) based three-phase VIENNA rectifiers achieves high power factor (PF) easily. However, under unbalanced grid conditions, the fundamental phase shift between the input current and corresponding ...
Jianguo Lyu +5 more
doaj +1 more source