Results 171 to 180 of about 233 (207)
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IEEE Transactions on Industrial Electronics, 2017
The performance of the grid-connected inverter was affected by the uncertainty of the grid conditions including the background distortion and the grid impedance. Typically, the feedforward of the grid voltage at the point of common coupling (PCC) highly suppressed the grid current harmonics caused by the grid voltage distortion; however, the PCC grid ...
Binfeng Zhang +2 more
exaly +2 more sources
The performance of the grid-connected inverter was affected by the uncertainty of the grid conditions including the background distortion and the grid impedance. Typically, the feedforward of the grid voltage at the point of common coupling (PCC) highly suppressed the grid current harmonics caused by the grid voltage distortion; however, the PCC grid ...
Binfeng Zhang +2 more
exaly +2 more sources
Grid voltage control with distributed generation using online grid impedance estimation
Sustainable Energy, Grids and Networks, 2016Abstract Distributed generation (DG) units usually do not participate in the grid voltage control and inject power regardless of the grid voltage. Only when the grid voltage level surpasses a certain threshold, these units shut down to avoid any damage.
Jeroen De Kooning +2 more
exaly +2 more sources
A Digital Controlled PV-Inverter With Grid Impedance Estimation for ENS Detection
IEEE Transactions on Power Electronics, 2005Udgivelsesdato ...
Frede Blaabjerg +2 more
exaly +3 more sources
Grid Impedance Estimation with Oversampling for Grid-Connected Converters
2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe), 2020This paper presents a computationally simple estimation method of the grid impedance with the usage of a harmonic signal. To minimise the interference with the grid, an algorithm to define the start of the measurement is presented. Furthermore, oversampling of the current and voltage at the point of common coupling (PCC) is used to reduce the amplitude
Niklas Himker +2 more
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Real-time grid impedance estimation technique for grid-connected power converters
2012 IEEE International Symposium on Industrial Electronics, 2012Grid impedance is one of the most important parameters for operating and controlling of grid-connected converters, especially with the high penetration of renewable energy sources into microgrid and smart grid. One of the technical challenges is how to fast and accurately estimate the grid impedance, even under the distorted and unbalanced conditions ...
Herong Gu +3 more
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2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
When the impedance criterion is used to analyze the stability of the three-phase inverter-grid system, the impedance acquisition of the grid-connected inverter is particularly important. In the stationary reference frame, the equivalent admittance accurately characterizes the impedance characteristics of the inverter.
Junliang Liu +3 more
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When the impedance criterion is used to analyze the stability of the three-phase inverter-grid system, the impedance acquisition of the grid-connected inverter is particularly important. In the stationary reference frame, the equivalent admittance accurately characterizes the impedance characteristics of the inverter.
Junliang Liu +3 more
openaire +1 more source
Electrical Engineering, 2020
This paper proposes a method for estimating the appropriate grid impedance for applications in which distributed generators are connected to the grid through three-phase inverters. The method is based on variations in active and reactive power injected by the inverters into the power system.
José H. Suárez +4 more
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This paper proposes a method for estimating the appropriate grid impedance for applications in which distributed generators are connected to the grid through three-phase inverters. The method is based on variations in active and reactive power injected by the inverters into the power system.
José H. Suárez +4 more
openaire +1 more source
Grid Impedance Estimation via Excitation of $LCL$-Filter Resonance
IEEE Transactions on Industry Applications, 2007Inverters adopted in distributed power generation, active filter, and uninterruptible power supply are often connected to the grid through an inductance-capacitor-inductance (LCL) filter. The impedance of the LCL filter has a typical frequency characteristic with a resonance peak.
LISERRE, Marco +2 more
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A new method of on-line grid impedance estimation for PV inverter
Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04., 2004The recent increase in photo-voltaic (PV) installations calls for new and better power quality requirements with respect to connection to the grid supply. Therefore, different methods are typically used for continuous grid monitoring, usually by using external devices.
Teodorescu, Remus; id_orcid 0000-0002-2617-7168 +3 more
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