Results 11 to 20 of about 233 (207)
Real-Time Grid Impedance Estimation Using a Converter [PDF]
2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019 This paper presents two real-time methods for estimating the grid inductance and resistance using a three-phase converter. In the methods, a single-frequency rotating voltage signal with a small magnitude is injected to the converter voltage reference. The converter measures the currents and voltages at the point of common coupling (PCC).
Routimo, Mikko +3 more
openaire +3 more sources
Adaptive Impedance-Conditioned Phase-Locked Loop for the VSC Converter Connected to Weak Grid
Energies, 2021 In this paper, an adaptive version of the impedance-conditioned phase-locked loop (IC-PLL), namely the adaptive IC-PLL (AIC-PLL), is proposed. The IC-PLL has recently been proposed to address the issue of synchronisation with a weak AC grid by ...
Mostafa A. Hamood +2 more
doaj +1 more source
Parameter Estimation of a Grid-Tied Inverter Using In Situ Pseudo-Random Perturbation Sources
Energies, 2023 Inverters are playing an increasingly important role in the electrical utility grid due to the proliferation of renewable energy sources. Obtaining inverter models with accurate parameters is, therefore, essential for grid studies and design.
Ian Paul Gerber +2 more
doaj +1 more source
Grid Impedance Estimation Using Several Short-Term Low Power Signal Injections [PDF]
AUT Journal of Electrical Engineering, 2018 In this paper, a signal processing method is proposed to estimate the low and high-frequency impedances of power systems using several short-term low power signal injections for a frequency range of 0-150 kHz.
M. M. AlyanNezhadi +2 more
doaj +1 more source
PLL Instability of Wind Turbines During Severe Faults
IEEE Access, 2022 Stringent grid codes require wind turbines (WTs) to remain connected even during severe faults. This can result in PLL instability and Loss of Synchronisation (LoS), which is the main subject of this paper.
Amir Arasteh, Nicolaos A. Cutululis
doaj +1 more source
Adaptive Grid Impedance Shaping Approach Applied for Grid-Forming Power Converters
IEEE Access, 2022 This paper proposes an adaptive grid impedance shaping approach, implemented through a variable structure virtual impedance control strategy (VS-VIS), to improve the power flow control of grid-forming power converters (GF-PC).
Ricardo Lucio de Araujo Ribeiro +3 more
doaj +1 more source
Responsive and Resilient Vector Current Control for Variable Grids
IEEE Open Journal of Power Electronics, 2023 This article presents a set of control enhancements for standard vector current control (VCC) that improves its stability and dynamic performance in an extended range of SCRs.
Mathieu Kervyn de Meerendre +2 more
doaj +1 more source
IEEE Access, 2020 For inverters, a phase-locked loop (PLL) is usually needed for the grid synchronization. Typically, for the single-phase inverters, the orthogonal-signal-generators based PLLs (e.g., delay-based PLL) can be used.
Jinming Xu +4 more
doaj +1 more source
IEEE Access, 2021 This paper proposes a disturbance observer-based robust model predictive control (MPC) for a voltage sensorless grid-connected inverter with an inductive-capacitive-inductive (LCL) filter.
Nguyen Ngoc Nam +3 more
doaj +1 more source
Measurement-Based Distribution Grid Harmonic Impedance Models and Their Uncertainties
Energies, 2020 Aggregated Norton’s equivalent models, with parallel impedance and current injection at different harmonic frequencies are used to model the distribution grid in harmonic studies.
Ravi Shankar Singh +2 more
doaj +1 more source