Results 271 to 280 of about 12,297 (303)

Extended Kalman filter based grid synchronization in the presence of voltage unbalance for smart grid

ISGT 2011, 2011
In this paper, grid synchronization for gird-connected power generation systems in the presence of voltage unbalance and frequency variation is considered. A new extended Kalman filter based synchronization algorithm is proposed to track the phase angle of the utility network.
Ming Sun, Zafer Sahinoglu
openaire   +1 more source

Effects of randomly charging electric vehicles on voltage unbalance in micro grids

2015 50th International Universities Power Engineering Conference (UPEC), 2015
Unscheduled charging of Electric Vehicles (EVs) may shift voltage unbalance beyond the desired limit. Effects of uncoordinated charging of EVs were assessed by calculating voltage magnitudes and voltage unbalances at the end node of a residential feeder.
Mohammed J. M. Al Essa, L. M. Cipcigan
openaire   +1 more source

Effect of grid voltage unbalance on operation of a bi-directional converter

2008 40th North American Power Symposium, 2008
This paper describes the modeling of a 3-phase AC-DC-AC converter with two back to back space vector modulated voltage source inverters connected to a DC link. The converter allows four-quadrant operation in the P-Q plane and can be used to connect regenerative loads.
Subhadarshi Sarkar, Pradip Vijayan, Dionysios C. Aliprantis, Venkataramana Ajjarapu   +3 more
openaire   +1 more source

FPGA based DSC-PLL for grid harmonics and voltage unbalance effect elimination

2015 IEEE Applied Power Electronics Conference and Exposition (APEC), 2015
In this paper, the design of DSC-PLL (Delayed Signal Cancellation Phase Locked Loop) based on FPGA is discussed. This method shows outstanding performance for detection of fundamental positive sequence component voltage when the grid voltage is polluted by grid harmonics and voltage unbalance.
Jongmin Jo, Byung-Moon Han, Hanju Cha
openaire   +1 more source

Impact of electrical car charging on unbalance in public low voltage grids

11th International Conference on Electrical Power Quality and Utilisation, 2011
E-Mobility starts to become an important part of our live. Germany plans to bring 1 million cars into the market until 2020. Nowadays the cars mostly use single phase charging with charging currents up to 32A and sometimes even more. 2-phase charging is also in discussion.
Jan Meyer, Stephan Hähle, Peter Schegner, Carsten Wald   +3 more
openaire   +1 more source

Optimal inverter control for grid voltage unbalance mitigation

2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe), 2023
Werner de Wet, Johan Beukes, Francois du Plessis   +2 more
openaire   +1 more source

Negative-sequence admittance control scheme for distributed compensation of grid voltage unbalance

2012 IEEE 13th Workshop on Control and Modeling for Power Electronics (COMPEL), 2012
This paper proposes to ease the responsibility of the grid for voltage unbalance correction with distributed generation systems. Specifically, the functionality to decrease the negative-sequence voltage at the grid connection point is added to the control of distributed generation inverters.
Fei Wang, null Hualong Mao, null Dezhi Xu, null Yi Ruan   +3 more
openaire   +1 more source

Output voltage ripple reduction control strategy for three-phase combined PFC converter under grid voltage unbalance

2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019
The combined three-phase single-stage PFC converter is a promising topology in high-power applications. However, the output voltage ripple present under grid imbalance severely affects the output characteristics of the converter. Based on this, this paper analyzes the topology and conventional control strategy of the combined three-phase single-stage ...
Huishuang Fan, Hongqi Ben, Jichao Ning, Mingyuan Ding, Tao Meng   +4 more
openaire   +1 more source

Control of grid connected cascaded H-bridge multilevel converter during grid voltage unbalance for photovoltaic application

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
With a large penetration of distributed power, transmission system operators (TSO) have more stringent demands regarding the interconnection of the distributed power generation system (DPGS) to the utility grid in order to maintain a stable power system. Among the new demands, power generation systems are requested to ride through grid disturbances and
Ajay Kumar Morya, Anshuman Shukla, Suryanarayana Doolla   +2 more
openaire   +1 more source

A Grid Impedance Estimation Method Robust Against Grid Voltages Unbalance and Harmonic Distortions

Journal of Control, Automation and Electrical Systems, 2022
Hugo M. T. C. Gomes, Leandro L. O. Carralero, José H. Suárez, André N. Tahim, José R. Pinheiro, Fabiano F. Costa   +5 more
openaire   +1 more source