Results 1 to 10 of about 26,611 (260)
Impedance-Based Stability Analysis of Grid-Connected Inverters under the Unbalanced Grid Condition
Applied Sciences, 2023 As a common interface circuit for renewable energy integrated into the power grid, the inverter is prone to work under a three-phase unbalanced weak grid.
Jinzhu Shi, Lihui Yang, Hao Yang
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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
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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 +2 more
exaly +3 more sources
Enhanced TVI for Grid Forming VSC under Unbalanced Faults [PDF]
Energies, 2021 With an increasing capacity of inverter-based generation and with a 100% renewable energy power system on the horizon, grid forming converters have the potential to become the prevalent control mode in the grid. Thus, the correct performance of these devices is going to be crucial for system stability and security of supply.
Alain Sanchez-Ruiz +2 more
exaly +4 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 ...
Graham Town +2 more
exaly +2 more sources
Energy Reports, 2022 In the photovoltaic grid-connected power generation system, when proportional resonant (PR) control is adopted for the grid-side inverter in the two-phase stationary coordinate (αβ), there is a coupling problem between active power (P) and reactive power
Fuyun Wu +3 more
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A New Model Predictive Current Controller for Grid-Connected Converters in Unbalanced Grids [PDF]
IEEE Transactions on Power Electronics, 2022 Distributed energy resources are often connected to low-voltage distribution networks where the grid voltages may be unbalanced. This leads to an unwanted ripple in the output active power at twice the fundamental grid frequency. In this article, a new model predictive current controller is proposed for unbalanced grids.
Andrew, Euan Thomas +2 more
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Energies, 2022 Presented in this paper is a method of bidirectional real and reactive power control of a three-phase grid-connected inverter under unbalanced grid situations. Unbalanced three-phase load and unbalanced grid impedance are illustrations of unbalanced grid
Mohammad Alathamneh +3 more
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Energies, 2022 Proposed in this article is bidirectional real and reactive power control of a three-phase grid-connected inverter under unbalanced grid conditions using a proportional-resonance controller. Different unbalanced grid conditions have been studied, such as
Mohammad Alathamneh +3 more
doaj +1 more source
Ain Shams Engineering Journal, 2021 This paper presents improved energy management for grid-inverter of a hybrid photovoltaic (PV)/fuel cell (FC) energy system with unbalanced sensitive loads.
Mustafa İnci, Mehmet Selim Aygen
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