Accès ouvert
2026
article
OpenAlex
Marcel Nicola, Claudiu-Ionel Nicola
The global transition toward sustainable energy systems demands advanced technologies capable of achieving substantial reductions in transportation-related emissions. Proton Exchange Membrane Fuel Cell (PEMFC) powered electric vehicles represent a compelling pathway; however, their operational performance is highly contingent upon maintaining a stable …
ro
(code pays fourni par la source)
2025
conference-paper
OpenAlex
Maria Cristina Nitu, Ancuţa-Mihaela Aciu, Claudiu-Ionel Nicola, Marcel Nicola
Starting from the need to reduce the time required for analyzing and detecting power transformer faults, this article presents the development of a software application specific to this subject, based on artificial neural networks (ANN) classifiers, in which the theoretical classification method …
ro
(code pays fourni par la source)
2025
conference-paper
OpenAlex
Marcel Nicola, Claudiu-Ionel Nicola, Răzvan Prejbeanu, Marian Popescu et autres
This paper conducts an in-depth study of the interconnection of energy areas with respect to maintaining a constant frequency under load variation, focusing specifically on load frequency control (LFC). The study begins with a benchmark to further examine the impact of propagation …
ro
(code pays fourni par la source)
2025
conference-paper
OpenAlex
Claudiu-Ionel Nicola, Marcel Nicola, Camelia Marinescu, Andreea Valentina Iacob et autres
This paper begins with a Matlab/Simulink benchmark that models a common island-mode microgrid operation. In this model, a group of consumers is supplied by a primary energy source in the form of a proton exchange membrane fuel cell (PEMFC) stack. The microgrid …
ro
(code pays fourni par la source)
Accès ouvert
2025
article
OpenAlex
Marcel Nicola, Claudiu-Ionel Nicola, Dan Selișteanu, Dorin Șendrescu
The improvement of the performance of Permanent Magnet Synchronous Motor (PMSM) control systems is a challenge from many points of view, including the fact that that its mathematical model should also consider the parametric variations of the main modelled elements. In this …
ro
(code pays fourni par la source)
2025
conference-paper
OpenAlex
Marcel Nicola, Claudiu-Ionel Nicola, Cosmin Ionete, Monica Roman
This article proposes the use of a Proportional Integral Retarded (PIR) control algorithm in order to achieve improved performance on the load frequency control (LFC) problem in the case of interconnection of two area power system. Time delays arise inherently in the …
ro
(code pays fourni par la source)
2025
conference-paper
OpenAlex
Claudiu-Ionel Nicola, Marcel Nicola, Dan Selișteanu, Gheorghe Bujgoi
Starting from the need to obtain superior performance in Permanent Magnet Synchronous Motor (PMSM) control, but using low/medium hardware resources, this paper proposes a study of the performance of multi-motor control structures with equal or different speed reference, under the presents of …
ro
(code pays fourni par la source)
2025
conference-paper
OpenAlex
Maria Cristina Nitu, Ancuţa-Mihaela Aciu, Claudiu-Ionel Nicola, Marcel Nicola
The maintenance process for high power transformers is a complex process involving diagnostic techniques and methods. This paper presents an application based on the IEC ratio method (MR-IEC), which has shown good results in identifying faults in power transformers. The application uses …
ro
(code pays fourni par la source)
Accès ouvert
2025
article
OpenAlex
Marcel Nicola, Claudiu-Ionel Nicola, Dan Selișteanu, Dorin Șendrescu
Based on the overall Field Oriented Control (FOC) control strategy of a Permanent Magnet Synchronous Motor (PMSM), a flexible and efficient control system architecture is developed in this work to achieve superior control performance. Sliding Mode Control (SMC) laws are utilized for …
ro
(code pays fourni par la source)
Accès ouvert
2025
article
OpenAlex
Maria Cristina Nitu, Ancuţa-Mihaela Aciu, Marcel Nicola, Claudiu-Ionel Nicola
Power transformers are essential elements in the production and distribution of electricity, and keeping them in optimum operating condition is a constant concern for specialists in the field. The condition of power transformers is mainly determined by the condition of the mixed …
ro
(code pays fourni par la source)
2024
conference-paper
OpenAlex
Maria Cristina Nitu, Ancuţa-Mihaela Aciu, Marcel Nicola, Claudiu-Ionel Nicola
Power transformers are essential elements in the production and distribution of electricity, and keeping them in optimum operating condition is a constant concern for specialists in the field. The condition of power transformers is mainly determined by the condition of the mixed …
ro
(code pays fourni par la source)
2024
conference-paper
OpenAlex
Claudiu-Ionel Nicola, Marcel Nicola, Cosmin Ionete, Monica Roman
Starting from the fact that the Field Oriented Control (FOC) control strategy of the Permanent Magnet Synchronous Motor (PMSM) gives good results in terms of the usual indicators of response time quality, overshoot, steady-state error, but only in the usual operating range …
ro
(code pays fourni par la source)