Prof. Gheorghe Hazi, PhD, Prof. Aneta Hazi, PhD, Sorin Vernica, PhD
Rezumat
In lucrarea de fata autorii analizeaza conditiile de functionare selectiva a protectiilor numerice in cazul liniilor
electrice de medie tensiune cu neutral tratat prin bobina de stingere. Analiza se refera la protectia impotriva punerilor la
pamant monofazate, aceste defecte ridicand problem de selectivitate in functionarea protectiilor. Concluziile se bazeaza pe
determinarea prin calcul a curentilor de punere la pamant si a defazajelor dintre curentul homopolar si tensiunea
homopolara. Se prezinta rezultatele obtinute pentru linii de 20 kv aeriene si in cablu.
Cuvinte cheie: punere la pamantprotectie homopolara directionatabobina de stingere
Abstract
In this paper the authors analyze the selective operating conditions of the numerical protections in case of
medium voltage power lines grounded with Petersen coil. The analysis refers to the protection against one-phase grounded,
these faults raising the issue of selectivity in the operation of protections. Conclusions are based on the determination by
calculation of the earth fault currents and the phase shifts between zero sequence current and zero sequence voltage. It
presents the results obtained for 20 kV overhead lines and cable lines
Din același număr
- THE DESIGN AND IMPLEMENTATION OF A STREET LIGHTING CONTROL SYSTEM USING A 802.11 COMMUNICATION PROTOCOL: A CASE STUDY
- ANALYZE OF A COLLISION AVOIDANCE STRATEGY FOR COOPERATIVE ROBOTS
- CONTROL DRIVES FOR FLYWHEEL ENERGY STORAGE SYSTEM USED IN WIND APPLICATIONS
- CHALLENGES AND NECESSITIES OF VULNERABILITY ASSESSMENT FOR POWER SYSTEMS INFRASTRUCTURES
- CIRCUIT COUPLED ? 3-D FEM ANALYSIS OF A SINGLEPOLE AXIAL-FLUX VARIABLE RELUCTANCE MACHINE AND EXPERIMENTAL VALIDATION
- ENERGY EFFICIENCY – THE MAIN FEATURE OF THE SOLUTIONS DEVELOPED BY ICPE ACTEL
- PLC FIELD TESTS RESULTS USING PLC G3 PROTOCOL
- A FRAMEWORK FOR RANKING THREATS AGAINST POWER SYSTEMS SECURITY
- ROAD CONDITIONS MONITORING. ACTUAL AND UNDERGOING RESEARCH METHODS
- METHODS USED IN ORDER TO INCREASE HIGH FREQUENCY LOSSES IN PLANAR STRUCTURES
- MATHEMATICAL MODEL OF THE ALLOYING PROCESS AT THE EPITAXIAL SEMICONDUCTOR STRUCTURE GROWTH
- DESIGN AND SIMULATIONS OF IDC SENSOR USING COMSOL MULTYPHYSICS AND DIELECTRIC SPECTROSCOPY OF LTCC MATERIALS