Results 1 to 10 of about 44,267 (264)

Grid Impedance Characterization To Provide a Robust Phase-Locked Loop Design for PV Systems

, 2021
2021 IEEE PES: Innovative Smart Grid Technologies Europe (ISGT Europe), Espoo, Finland, 18-21 October 2021The operation of rooftop photovoltaic (PV) systems can be challenged by the electric characteristics of the low voltage (LV) feeders.
Ali, Ramy, O'Donnell, Terence, Jafarian, Mohammad, Terence O'Donnell, Andrew Keane, Mohammad Jafarian, Ramy Ali, Valentin Rigoni, Keane, Andrew, Rigoni, Valentin   +9 more
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Artificial Neural Network-Based Intelligent Grid Impedance Identification Method for Grid-Connected Inverter

, 2022
This paper presents an intelligent grid impedance identification method for grid-connected inverter, where artificial neural network (ANN) is presented to identify time-varying grid impedance.
Wang, Yanbo, Qiu, Yuan, Chen, Zhe; id_orcid, Tian, Yanjun   +3 more
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The effect of inrush transients on PV inverter's grid impedance measurement based on inter-harmonic injection [PDF]

, 2010
This paper addresses a cause for false tripping of photovoltaic inverters with anti-islanding protection based on impedance measurement with inter-harmonic injection.
Cobben, J. F.G., Bhattacharyya, S Sharmistha, Timens, R. B., Cuk, V., Bhattacharyya, S., Timens, R.B., Leferink, Frank Bernardus Johannes; id_orcid, Timens, RB, Cobben, J.F.G., V. Cuk, Kling, WL Wil, Leferink, F.B.J., R.B. Timens, Leferink, FBJ Frank, Leferink, Frank Bernardus Johannes, W.L. Kling, Cobben, JFG Sjef, S. Bhattacharyya, Bhattacharyya, S.; id_orcid, Cuk, V Vladimir, Leferink, F. B.J., F.B.J. Leferink, Kling, W.L., J.F.G. Cobben   +23 more
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Variable Virtual Impedance-based Overcurrent Protection For Grid-forming Inverters: Small-Signal, Large-Signal Analysis and Improvement [PDF]

, 2023
Grid-forming inverters are sensitive to large grid disturbances that may engender overcurrent due to their voltage source behavior. To overcome this critical issue and ensure the safety of the system, current limitation techniques have to be implemented.
Wu, Heng; id_orcid, Ilknur Colak, Wang, Xiongfei,, Taoufik, Qoria, Colak, Ilknur,, Wang, Xiongfei; id_orcid, Taoufik Qoria, Wu, Heng,, Qoria, Taoufik,, Colak, Ilknur, Xiongfei Wang, Heng Wu   +11 more
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Stability analysis of distributed generation grid-connected inverter

The Journal of Engineering, 2019
With the distributed new energy power generation increased, the power grid system becomes more and more complex, leading to its stability more likely to be affected. Among them, the resonance caused by impedance mismatch is particularly critical.
Xuemei Zheng, Zhuang Liu, Chao Wang, Yidan Liu, Yong Feng   +4 more
doaj   +1 more source

Explicit Impedance Modeling and Shaping of Grid-Connected Converters via an Enhanced PLL for Stabilizing the Weak Grid Connection

IEEE Access, 2022
The voltage source converters (VSCs) are used to interface and control the renewable energy resources that are integrated into the power grids. However, a weak grid connection raises a stability problem for grid synchronization of the grid-feeding ...
Mohsen Eskandari, Andrey V. Savkin, Hassan Haes Alhelou, Frede Blaabjerg   +3 more
doaj   +1 more source

Improving synchronization stability of grid connected converters by virtual impedance

IET Generation, Transmission & Distribution, 2021
With the increasing penetration of inverter based distributed generation, recent grid codes do not permit the disconnection of converters as soon as fault happens.
Omid Abdoli, Mehdi Gholipour, Rahmat‐allah Hooshmand   +2 more
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Adjusting output impedance using a PI controller to improve the stability of a single-phase inverter under weak grid

Transactions on Environment and Electrical Engineering, 2016
Explored in this paper is the grid impedance effect on the stability of a single-phase grid connected inverter with an LC filter based on an analysis of the inverter output impedance.
Jiao Jiao, R. Mark Nelms
doaj   +1 more source

A Control Parameters Design Method With Multi-Constrains for an LCL-Filtered Grid-Connected Inverter in a Weak Grid

Frontiers in Energy Research, 2022
Under weak grid conditions, the variation of the grid impedance will affect the steady-state and dynamic performance of the LCL-filtered grid-connected inverter and even make the inverter unstable.
Fuyun Wu, Zhuang Sun, Weiji Xu, Zhizhou Li, Jianguo Lyu   +4 more
doaj   +1 more source

Robust control of grid-connected converters under wide grid impedance variation

, 2019
This paper investigates the robust current control of grid-connected converters operating under wide grid impedance variation. Digital state feedback control gains are obtained based on linear matrix inequalities that ensure the location of the closed ...
Montagner, Vinícius F., Osório, Caio R. D., Vinicius F. Montagner, Lucas C. Borin, Caio R. D. Osorio, Gustavo G. Koch, Borin, Lucas C., Nascimento, Monique R., Oliveira, Ricardo C. L. F., Koch, Gustavo G., Monique R. Nascimento, Ricardo C. L. F. Oliveira   +11 more
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