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Lenos Hadjidemetriou
University of Cyprus
48Publications
9H-index
285Citations
Publications 48
Newest
Published on Jun 1, 2019
Andreas Kotsonias , Lenos Hadjidemetriou9
Estimated H-index: 9
(UCY: University of Cyprus)
+ 1 AuthorsElias Kyriakides24
Estimated H-index: 24
(UCY: University of Cyprus)
Low voltage distribution grids (LVDGs) are evolving from their traditional passive behavior into highly active systems. Their secure and reliable operation will require effective control schemes which in return require reliable and accurate monitoring systems. Most of the related existing works rely on the three-phase Weighted Least Squares (WLS) state estimation method which is used mainly on Medium Voltage Distribution Grids (MVDGs). However due to different characteristics between MVDGs and L...
Published on Jun 1, 2019
Anastasis Charalambous1
Estimated H-index: 1
(UCY: University of Cyprus),
Lenos Hadjidemetriou9
Estimated H-index: 9
(UCY: University of Cyprus),
Elias Kyriakides24
Estimated H-index: 24
(UCY: University of Cyprus)
A grid-connected power electronics based distributed generator can act as an active element by providing support to the grid under various disturbances. In this paper, a voltage support scheme dedicated for distributed generators installed in the low voltage distribution network is proposed. The voltage support considers the resistive characteristics of the distribution line grid impedance in order to maximize its effectiveness. Therefore, the optimal active and reactive current references are e...
Published on Jan 12, 2019in Iet Power Electronics2.84
Zunaib Ali3
Estimated H-index: 3
(Frederick University),
Nicholas Christofides4
Estimated H-index: 4
(Frederick University)
+ 1 AuthorsElias Kyriakides24
Estimated H-index: 24
(UCY: University of Cyprus)
Renewable sources are expected to be a key element of future power systems. With many challenges ahead, thinking out of the box is necessary in order to equip the power system with additional advanced functionalities and capabilities to combat the anticipated challenges. The associated equipment of distributed generation can be seen as a grid asset upgrade because of the increased number of elements connected to the grid, such as grid side converters (GSC) of photovoltaics and battery storage sy...
Published on Dec 3, 2018in Energies2.71
Mihai Sanduleac6
Estimated H-index: 6
,
João Martins7
Estimated H-index: 7
+ 5 AuthorsRooktabir Sauba
Published on Oct 9, 2018in arXiv: Signal Processing
Andreas Kotsonias , Lenos Hadjidemetriou9
Estimated H-index: 9
+ 1 AuthorsElias Kyriakides24
Estimated H-index: 24
The most widely used method for monitoring Low Voltage Distribution Grids (LVDGs) is the three phase Weighted Least Squares (WLS) State Estimation (SE), which was initially developed for Medium Voltage Distribution Grids (MVDGs). This methodology is implicitly applied in LVDGs with an assumption that the neutral conductor represents a zero potential across the whole system. However, this assumption is often not valid for LVDGs as the consumers loads are highly asymmetrical and the neutral conduc...
Published on Sep 1, 2018
Mustafa Cagatay Kocer (Abdullah Gül University), Yeliz Yoldas2
Estimated H-index: 2
(Abdullah Gül University)
+ 11 AuthorsJose L. Martinez-Ramos4
Estimated H-index: 4
(University of Seville)
Integration of renewable energy sources (RESs) into power systems has been a popular topic for a long time. Due to government policies and incentives, it will be more popular in the future since it is a free and environment-friendly nature. Besides its advantages, photovoltaic (PV) generation causes some serious problems to the grid. Since PV generation directly depends on the solar irradiance, cloud movements can cause sudden changes on the output of PV power and this results in some power issu...
Published on Sep 1, 2018
Lazaros Zacharia1
Estimated H-index: 1
(UCY: University of Cyprus),
A. Kyriakou (UCY: University of Cyprus)+ 4 AuthorsNicholas Borg
During the last decade, microgrids are attracting a significant attention due to their numerous advantages. Amongst them, the most important one is their ability to operate either in grid-connected or in islanded (autonomous) mode. However, the transition between the two modes can be challenging in terms of maintaining the stability and integrity of the microgrid. In this paper, an optimization-based islanding methodology is developed to ensure a timely and smooth transition from the grid-connec...
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