Results 221 to 230 of about 26,611 (260)

Learning parameters and topology in unbalanced distribution grids

IET Conference Proceedings, 2022
The methods proposed in this paper aim at learning the parameters and topology of a distribution grid by making use of available system measurements. The methods that are used rely on the formulation of the underlying physical equations as linear systems and use the resulting problem as a regression problem by applying the ordinary least squares method.
Jongh, S. de, Gielnik, Frederik, Mueller, Felicitas, Schneider, Anna, Suriyah, Michael, Leibfried, Thomas   +5 more
openaire   +2 more sources

Control of Grid Connected Converters Under Unbalanced Grid Faults

2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2018
A grid connected inverter with an unbalanced voltage at the point of common coupling creates oscillation in DC link voltage at twice the grid frequency and inject highly distorted current into the grid. In this paper analytical expression for oscillation of DC link voltage and distortion in current injected to the grid are derived.
Souradeep Pal, Manash Mishra, Apurva Verma, Prabir Ranjan Kasari, Bikram Das, Abanishwar Chakraborti   +5 more
openaire   +1 more source

Unbalanced Three-Phase Optimal Power Flow for Smart Grids

IEEE Transactions on Industrial Electronics, 2011
Advanced distribution management system (DMS), an evolution of supervisory control and data acquisition obtained by extending its working principles from transmission to distribution, is the brain of a smart grid. Advanced DMS assesses smart functions in the distribution system and is also responsible for assessing control functions such as reactive ...
Sergio Bruno, Silvia Lamonaca, Giuseppe Rotondo, Ugo Stecchi, Massimo La Scala   +4 more
openaire   +1 more source

Study on grid feed forward strategy under Unbalanced Grid Condition

2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2019
In the case of unbalanced power grid, the disturbance of the power grid is introduced into the feed forward accurately, thus, the output feed-forward part of the inverter is in perfect agreement with the unbalanced power grid, in order to achieve good and effective control of the current of the converter in the dynamic change of the power grid.
Zheng-ce Cai, Cheng Zhou, Fang Xie
openaire   +1 more source

Nonsinusoidal power caused by measurements of grid impedances at unbalanced grid voltages

2008 International School on Nonsinusoidal Currents and Compensation, 2008
At low-voltage level there is already a commercial measurement device that is able to identify the grid impedance in dependency of time and frequency. Since at the low-voltage level a four-wire system and at the medium-and high-voltage level a three-wire system is installed, the method to identify the grid impedance has to be varied.
null Trung Do Thanh, Steffen Schostan, Klaus-Dieter Dettmann, Detlef Schulz   +3 more
openaire   +1 more source

Impact of unbalanced grid conditions on PV systems

IEEE PES General Meeting, 2010
With more and more photovoltaic (PV) panels, energy storage devices and other small generators being put into service, it is necessary to integrate them into power systems. Grid integration provides a reliable means for customers to use renewable energy such as solar at its maximum and to use other sources as backup.
null Lingling Fan, null Zhixin Miao, Alexander Domijan   +2 more
openaire   +1 more source

Control strategy for inverter in a micro-grid under unbalanced grid condition

2016 IEEE Conference on Technologies for Sustainability (SusTech), 2016
Micro-grid is gaining momentum as it addresses grave concerns like climate change and energy security. This paper presents power flow control algorithm for voltage source inverter used in a micro-grid under unbalanced grid conditions. Energy Storage and local energy source are the key components of the micro-grid that is required to help stabilize grid.
L. Ashok Kumar, Sheeba Babu
openaire   +1 more source

Grid Fault Analysis of Unbalanced Loaded DFIG

Advanced Materials Research, 2012
The electrical energy consumption is rising and there is a steady increase in the demand of power generation. To meet the demand fuel reserves are not sufficient. So, we can go to non-conventional energy sources like solar, tidal, wind and etc. In that wind generating system is rapidly growing one.
R. Bhanu Raghava Prakash, K. Trinath, S. Sundeep   +2 more
openaire   +1 more source

Flexible Operation of Grid-Interactive Converters under Unbalanced Grid Conditions

Advanced Science and Technology Letters, 2015
The grid codes of power systems with high penetration of renewable sources impose stringent requirements on the operation of Distributed Renewable Energy Sources (DRES) under the unbalanced grid faults. A generalized power control strategy based on the symmetrical components is used in this paper to control the power delivery under unbalanced grid ...
M. Ali Fotouhi, Zita Vale, Rui Castro, Sónia F. Pinto, Fernando A. Silva   +4 more
openaire   +1 more source

Influence of Ground Impedance on Unbalanced Analysis of Grid

2018 20th National Power Systems Conference (NPSC), 2018
Renewable energy utilization and projects are being used as green energy initiatives worldwide. There are smallest possible renewable energy sources of the order of few KW to large wind mill and PV farms of the capacity of several 100 MW in India. Current systems are hybrid systems having combination of AC, DC, single phase, 3 phase, grounded and ...
R Raghunatha, V Muralidhara, D Thukaram
openaire   +1 more source