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Engineering education by its nature is a costly program in university environments. Perhaps the most costly component is the laboratory facility, usually consisting of specialized equipment. Effective instruction of some topics in power engineering education requires experience with actual equipment, rather than small-scale replicas or simulation. In this… (More)

– World wide drilling is developing for oil, gas or water resources. Electric motors power 75% of the total drilling rigs installation, augmenting to 95% for the case of Romania. Monitoring diesel generators micro-power station and motors of the rig is the second important thing to do and complete the main task of drilling process monitoring. This paper… (More)

The chapter covers general issues related to power quality in Electric Arc Furnaces. The use of electric arc furnaces (EAF) for steelmaking has grown dramatically in the last decade. Of the steel made today 36% is produced by the electric arc furnace route and this share will increase to 50 by 2030. The electric arc furnaces are used for melting and… (More)

The use of the power and energy functional in the analysis of the electric circuits makes it possible to appreciate the energetic equilibrium state attained in the circuit at a certain moment. This paper is concerned with a demonstration of the principle of minimum dissipated active power for the steady state circuits under nonsinusoidal conditions. It is… (More)

- Costin Cepisca, Sorin Dan Grigorescu, Mircea Covrig, Horia Andrei
- DDECS
- 2007

Fast Fourier Transform (FFT) computing may be improved using two ways: the first way consists in packing two separate real functions into the complex input array in such a way that their individual transforms can be separated from the result; the second method used to improve the FFT computation consists in packing the real input of length N array cleverly,… (More)

- Horia Andrei, Lucian Nastase, Emil Diaconu, Costin Cepisca, Sorin Dan Grigorescu, Paul Andrei
- 2011 IEEE EUROCON - International Conference on…
- 2011

The paper presents an efficient computation sensitivity method for the analog two-port linear networks, without using the circuit topology. It is consider the steady state non-sinusoidal regime and the algorithm analyze the sensitivities of the network functions correlating it to the relative values which characterize the input current and voltage… (More)

- Cosmin Karl Banica, Ileana Ghita, Costin Hedwig Gandescu, Sorin Dan Grigorescu, Sanda Paturca
- 2015 7th International Conference on Electronics…
- 2015

This paper describes a system for power supply, monitoring, control and communication for isolated temporary habitats. The system described consists in six modules and offers all the necessary equipment in order to operate a fully functional camp.

- Horia Andrei, Costin Cepisca, Sorin Dan Grigorescu, Paul Andrei
- 2010 XIth International Workshop on Symbolic and…
- 2010

A new method for calculation of first order sensitivity and sensitivity groups for Multiple FeedBack (MFB) filter in non-sinusoidal regime is presented. Such a group of linear dependent parameters is defined the relative input values of current and voltage harmonics. The interdependence of the various network sensitivities for a given network needs special… (More)

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