Results 21 to 30 of about 76,373 (262)
A Sexually Unbalanced Model of Current Account Imbalances [PDF]
, 2010 Large savings and current account surpluses by China and other countries are said to be a contributor to the global current account imbalances and possibly to the recent global financial crisis. This paper proposes a theory of excess savings based on a major, albeit insufficiently recognized by macroeconomists, transformation in many of these societies,
Qingyuan Du, Shang-Jin Wei
openaire +2 more sources
IET Power Electronics, 2021 Grid‐connected converters in distributed generation systems are required to operate under highly distorted voltage with a wide frequency range, and to provide active/reactive power information for ancillary services and power control. This paper presents
Sakda Somkun
doaj +1 more source
Unbalanced and Reactive Currents Compensation in Three-Phase Four-Wire Sinusoidal Power Systems
Applied Sciences, 2020 In an unbalanced linear three-phase electrical system, there are inefficient powers that increase the apparent power supplied by the network, line losses, machine malfunctions, etc.
Rafael Montoya-Mira +4 more
doaj +1 more source
A Control Method for Three-phase Inverters with Unbalanced and Nonlinear Loads
Zhejiang dianli, 2022 Focusing on three-phase inverter control with unbalanced and nonlinear loads in islanded microgrids， an inverter control method including fundamental voltage tracking， harmonic voltage suppression， active damping and output current limiting is proposed ...
XIA Xiang +5 more
doaj +1 more source
Critical Evaluation Of Fbd, Pq And Cpt Current Decompositions For Four-wire Circuits
Eletrônica de Potência, 2009 This paper investigates the major similarities and discrepancies of three important current decompositions proposed for the interpretation of unbalanced and/or non linear three-phase four-wire circuits.
Fernando P. Marafão +2 more
doaj +1 more source
Comprehensive Predictive Control Model for a Three-Phase Four-Legged Inverter
Energies, 2023 This paper presents a comprehensive model predictive control (CMPC) method to control a three-phase four-legged inverter (TP4LI) for PV systems. The proposed TP4LI model aims to predictively model and control switching frequency and higher voltage ...
Muhammad M. Fayyaz +3 more
doaj +1 more source
Contribution Determination for Multiple Unbalanced Sources at the Point of Common Coupling
Energies, 2017 Three-phase unbalance is an important power quality issue that can cause many negative effects to the power system. Effective mitigation and management of voltage unbalance will benefit from the knowledge of how the unbalanced sources contribute to the ...
Yuanyuan Sun +3 more
doaj +1 more source
Minimum Loss Discontinuous Pulse-Width Modulation Per Phase Method for Three-Phase Four-Leg Inverter
IEEE Access, 2020 The three-phase four-leg inverter (TPFLI) provides unbalanced voltage to a load or injects unbalanced current to a grid to compensate unbalanced current. However, it has a high switching loss because of the fourth leg. This paper presents a discontinuous
Soo Yeon Kim +2 more
doaj +1 more source
Unbalanced Current Sharing Control in Islanded Low Voltage Microgrids
Energies, 2018 This paper reports a new control strategy to improve sharing of unbalanced currents in islanded LV microgrids. This technique provides fast and effective sharing of positive-, negative- and zero-sequence currents, and is the first example of zero ...
Foad Najafi +2 more
doaj +1 more source
IEEE Access, 2020 To improve the fault-tolerant operation capability of bidirectional voltage source converter (BVSC), an improved model predictive current control (IMPCC) for fault-tolerant BVSC, is proposed with balanced DC-link capacitor voltage under unbalanced grid ...
Shiyang Hu +3 more
doaj +1 more source