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Conferința Internațională SIELMEN - Sisteme Electromecanice și Energetice: Recent submissions

Now showing items 41-60 of 171

Optimal placement of synchronized phasor measurement technologies based on different methods of optimization

MURDID, Ecaterina; STRATAN, Ion (Editura ALMA, 2015)

This paper presents an analysis and systematization of the diverse methods on the optimal placement of the phasor measurement units (PMU). It is proposed the classification of the methods developed up to date in different ...
Principiul de elaborare a protecţiei prin relee a lea cu autocompensare la scurtcircuite nesimetrice dintre fazele apropiate

KIORSAK, M.; TURCUMAN, L.; TURTURICA, N. (Editura ALMA, 2015)

În articolul de faţă sunt analizate principiile de elaborare a protecţiei prin relee la scurtcircuite dintre fazele apropiate a liniilor electrice cu autocompensare în baza componentelor simetrice hexafazate. Cercetările ...
Metodă rapidă de calcul al inversei matrice Jacobi

GROPA, Victor; STRATAN, Ion (Editura ALMA, 2015)

Această lucrare prezintă o metodă rapidă de recalcul al inversei matrice Jacobi, utilizată pe larg la calculele regimului permanent de funcţionare al SEE. Metoda este bazată pe descompunerea în serie de puteri a unei funcţii ...
Unele aspecte privind protecția șI metoda de calcul a curenților de scurtcircuit în sistemele eoliene cu viteză variabilă

MACOVEI, Ilie; GROPA, Victor; RUJANSCHI, Dumitru (Editura ALMA, 2015)

În timpul de față are loc o extindere masivă a introducerii în exploatare a surselor alternative de energie, mai cu seamă a celor eoliene. Există proiecte și în Republica Moldova. Se utilizează preponderent turbine eoliene ...
Unele aspecte privind problema de ajustare optimală a protecţiei prin relee într-un system energetic vast

MACOVEI, Ilie; AMBROS, Tudor; RUJANSCHI, Dumitru (Editura ALMA, 2015)

Una dintre principalele condiţii care se pun reţelelor electrice este aceea a siguranţei în funcţionare, adică a alimentarii continue cu energie electrică a consumatorilor. Asigurarea funcţionarii fără întrerupere a ...
Analytical Algorithms for Synthesis of the State Space Controllers for the Control Systems with Aperiodic Step Response

FIODOROV, Ion; IZVOREANU, Bartolomeu; COJUHARI, Irina; MORARU, Dumitru (Editura ALMA, 2015)

Elaboration of the analytical algorithms for synthesis of the state space controllers, in form of algebraic expressions, by the maximum stability degree criterion, that offers to the designed control systems an aperiodic ...
Sergiu Rădăuțan – promotor al legăturilor cu comunitatea științifică mondială

TODOS, Petru; MANOLEA, Gheorghe (Editura ALMA, 2015)

Lucrarea deschide seria unor evocări prezentate la edițiile SIELMEN.Având în vedere rolul primului Rector al Universității Tehnice a Moldovei în stabilirea legăturilor cu comunitatea științifică mondială s-a considerat ...
Faults Diagnosis in Transport and Distribution Lines Based on the Analytic Model

IVANOV, Virginia; BROJBOIU, Maria; IVANOV, Sergiu (Institute of Electrical and Electronics Engineers, 2017)

The method based on analytic models can be used when the system behavior is compared with the results of the mathematical model which reproduces the system in normal operation conditions. The paper applies the diagnosis ...
A Note on Leakage Diagnosis for an Irrigation Network

MARZOUGUI, T.; BENELGHALI, S.; OUTBIB, R.; DOUMENC, F. (Institute of Electrical and Electronics Engineers, 2017)

This note is a contribution to the problem ofb leakage detection in irrigation networks. The main goal is to reduce the lost water due to the leakages. This lost water represents a source of useless electrical energy ...
A Theoretical Result on Stabilizability of Oxygen Excess Ratio for PEM Fuel Cell

NIANE, Moustapha; ZERROUGUI, Mohamed; OUTBIB, Rachid (Institute of Electrical and Electronics Engineers, 2017)

This paper is a contribution to the problem of the control of PEM Fuel Cell. More precisely, a theoretical result is proposed to prove that the oxygen excess ratio value can controlled by using a continuous state feedback. ...
Computer Assisted Diagnosis of Automatic Signalling Installations with Blinking Red Lights

SPUNEI, Elisabeta; PIROI, Ion; MUSCAI, Cristian; PIROI, Florina (Institute of Electrical and Electronics Engineers, 2017)

This work presents a modern method for the diagnosis of railroad level crossing automatic signalling installations. The method proposed here is based on diagnosis diagrams designed by the authors. The diagrams cover all ...
Reduction of Power Consumption for Cathodic Protection of Reinforced Concrete Pillars

COLESNIC, Igor; ANISIMOV, Vladimir; POSTORONCA, Sveatoslav; ANISIMOV, Victor (Institute of Electrical and Electronics Engineers, 2017)

For electrical protection of steel products against corrosion, two protection options are used, named respectively the polarity of the potential supplied to the item: cathodic and anodic. For cathodic protection, which is ...
Methodical approach to weak buses and ties detection in a power system

STRATAN, Ion; RADILOV, Tudor; PRIPA, Marin; GROPA, Victor (Institute of Electrical and Electronics Engineers, 2017)

The paper covers a complex approach to weak buses and ties detection in a power system. The applied method is based on singular value decomposition of sensitivity matrix to identify the weak spots in a power system and the ...
Analysis of the Actual Situation Regarding the Methods of Processing the Neutral in the 6-35 kV Networks

DOBREA, Ina; CORNOVAN, Irina (Institute of Electrical and Electronics Engineers, 2017)

The paper is dedicated to the analysis of the possibility of reducing the overvoltage surges in case of accidents in the medium voltage networks by modifying the mode of treatment of the neutral, which will allow extending ...
Aspects on Choosing and Exploiting in Economic Conditions the Medium Voltage Electrical Power Transformers

ARDELEANU, Mircea-Emilian; STĂNESCU, Dan Gabriel; MINCULESCU, Cristian; POPA, Ştefan (Institute of Electrical and Electronics Engineers, 2017)

The reduction of electricity consumption in many situations, by the disappearance of the large industrial enterprises considered as “energy-intensive” and the emergence of small and medium-sized industrial enterprises, led ...
Three Parameters Optimization of Acting Force of DC Electromagnet

DOLAN, Alin-Iulian (Institute of Electrical and Electronics Engineers, 2017)

The paper proposes an optimized geometry for a DC electromagnet combining the experimental design (DOE) and FEM. The optimization problem takes into account three geometrical parameters (coil shape ratio, support thickness ...
Centralised District Heating Systems: Reality and Perspectives

LEU, Vasile; CERNEI, Mihail (Institute of Electrical and Electronics Engineers, 2017)

The article presents the history of centralised district heating systems in Moldova, evolution, current state and prospects for short-term investments financed by raising funds from external creditors.
A Comprehensive Solution for Optimal Capacitor Allocation Problem in Real Distribution Networks

NEAGU, Bogdan Constantin; IVANOV, Ovidiu; GAVRILAŞ, Mihai (Institute of Electrical and Electronics Engineers, 2017)

The optimal capacitor allocation in electricity distribution networks (EDN) plays a meaningful role in voltage profile improvement, power factor amelioration and also power losses minimization. This work presents two ...
Voltage Profile Improvement in Electricity Distribution Networks – A Genetic Algorithm Benchmark Study

IVANOV, Ovidiu; NEAGU, Bogdan Constantin; GAVRILAŞ, Mihai (Institute of Electrical and Electronics Engineers, 2017)

Voltage quality is an essential requirement in the operation of electricity distribution systems. At consumer busbars, the deviation from the nominal voltage has specific ranges, prescribed in technical regulations. A ...
Evaluation of the minimum operating duration of cogeneration units that could ensure economic viability

ARION, Valentin; CHELMENCIUC, Corina; NEGURA, Călin (Institute of Electrical and Electronics Engineers, 2017)

This article touches upon the issue of determining the annual minimum economic operating period of cogeneration units, based on internal combustion engines. The calculation of this important indicator for cogeneration ...

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Conferința Internațională SIELMEN - Sisteme Electromecanice și Energetice: Recent submissions

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