Prof. Dr. Gheorghe Grigoras
Power Engineering, The "Gheorghe Asachi" Technical University of Iasi, Iaşi, Romania
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Academic Career Length
22Years (2005-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 September 2012 in International Journal of Electrical Power & Energy Systems
Journal Article
Florina Scarlatache
Gianfranco ChiccoGheorghe GrigorasGCGheorghe Cartina
Gheorghe Cartina
Journal Article
MSMudita Sandesara
Mudita SandesaraUBUmesh Bodkhe
Umesh BodkheSTSudeep Tanwar
Sudeep TanwarMAMohammad Alshehri
Mohammad AlshehriRSRavi Sharma
Ravi Sharma
Raboaca Maria Simona +2
With the tremendous growth in mobile phones, mobile application development is an important emerging arena. Moreover, various applications fail to serve the purpose of getting the attention of the intended users, which is determined by their User Interface (UI) and User Experience (UX). As a result, developers often find it challenging to meet the users’ expectations. To date, several reviews have been carried out which explored various aspects of design and the experience of mobile applications using UX/UI. However, many of these existing surveys primarily focused on only some of the issues in isolation but did not consider all the major parameters such as visualisation/graphics, context, user behaviour/emotions/control, usability, adaptability/flexibility, language, and feedback. In our pilot survey, we gathered the preferences and perceptions of a heterogeneous group of concerned people and considered all the aforementioned parameters. These preferences would serve as a reference to mobile application developers, giving them useful insights. Our proposed approach would help mobile application developers and designers focus on the particular UI/UX problems of mobile applications as per their relevant context. A comparative analysis of the various UI and UX factors that determine a mobile application interface is presented in this paper.
1 March 2015 in Energy
Journal Article
Gheorghe GrigorasFlorina Scarlatache1 October 2019
Conference Paper
OIOvidiu Ivanov
Ovidiu Ivanov
Bogdan-Constantin NeaguMGMihai Gavrilas
Mihai Gavrilas
Gheorghe GrigorasCSCalin-Viorel Sfintes
Calin-Viorel Sfintes
In the Romanian electricity distribution systems, the industrial consumption has significantly reduced, while the residential demand is increasing. Small-scale Distributed Generation sources are beginning to be used in residential areas, and they are operated in networks designed decades ago. In the absence of optimized consumer allocation on the network’s phases, these developments can lead to high phase unbalances in low voltage distribution networks, with increased active power losses and poor voltage quality. This paper presents a balancing approach that uses a Genetic Algorithm with the aim of minimizing the active power losses over an interval of 24 hours. The method is tested in a real Romanian low voltage distribution network with Smart Metering load data.
1 January 2009 in Advances in Electrical and Computer Engineering
Journal Article
The demand characteristic is the most important one in analyzing customer information. In a distribution network, there is in any moment certain degree of uncertainty about busses loads, ...
Journal Article
Bogdan-Constantin Neagu
Ovidiu IvanovGheorghe Grigoras
Mihai GavrilasA growing number of households benefit from government subsidies to install renewable generation facilities such as PV panels, used to gain independence from the grid and provide cheap energy. In the Romanian electricity market, these prosumers can sell their generation surplus only at regulated prices, back to the grid. A way to increase the number of prosumers is to allow them to make higher profit by selling this surplus back into the local network. This would also be an advantage for the consumers, who could pay less for electricity exempt from network tariffs and benefit from lower prices resulting from the competition between prosumers. One way of enabling this type of trade is to use peer-to-peer contracts traded in local markets, run at microgrid (μG) level. This paper presents a new trading platform based on smart peer-to-peer (P2P) contracts for prosumers energy surplus trading in a real local microgrid. Several trading scenarios are proposed, which give the possibility to perform trading based on participants’ locations, instantaneous active power demand, maximum daily energy demand, and the principle of first come first served implemented in an anonymous blockchain trading ledger. The developed scheme is tested on a low-voltage (LV) microgrid model to check its feasibility of deployment in a real network. A comparative analysis between the proposed scenarios, regarding traded quatities and financial benefits is performed.
About Me
Gheorghe Grigoraș earned his M.S. (2000) and Ph.D. (2005) in Electrical Power Engineering from the "Gheorghe Asachi" Technical University of Iași, where he is now a Full Professor in the Department of Power Engineering. His work in power systems optimisation has led to 24 books, 17 book chapters, and more than 300 publications; and academic promotions from Lecturer (2005-2017) to Associate Professor (2017-2022), and finally, Full Professor (2022-present). He is a member of the editorial boards of 9 scientific journals and has edited 9 special issues as a guest editor. As General Chair, he has led 12 international conferences and participated in over 300 Technical Programme Committees for symposia and conferences across Europe, Asia, North America, Australia, and Africa. Furthermore, he is a member of the Advisory Board of the American Society for Electrical Engineering and is affiliated with the International Association of Engineers and the World Academy of Science, Engineering, and Technology. His research primarily focuses on distribution network monitoring, power loss reduction in smart grids, renewable energy integration, photovoltaic system optimisation, and power quality improvement through intelligent control systems. Professor Grigoraș's expertise in pioneering Artificial Intelligence-driven solutions for electric distribution networks has contributed significantly to the development of efficient and sustainable power systems across Romania and beyond.