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The 3-D neutronics code COREDAX has been developed for x-y-z geometry based on AFEN (Analytic Function Expansion Nodal) method for SMART(System-integrated Modular Advanced ReacTor), a small sized integral type pressurized water reactor with the thermal power of 330 MWt, which is under development in Korea. The COREDAX code was applied to the SMART reactor core, which is smaller and different core...
The objective of this paper is to present a different approach in hydrothermal systems with individualized representation of hydroelectric power plants. This application is possible through modified objective function, considering costs and data of inflow from the first downstream hydroelectric power plant. By this way, the space coupling is considered in “featured outflow” and the optimization is...
A factor affecting of electrical energy over a set of three-phase transmission line is the degree of unbalance produced by asymmetrical placement of line conductors above the ground plane. This unbalanced condition leads to generation of negative - and zero-sequence voltage and currents which may have adverse effects sufficient to require line transposition. Generators, motors, shunt reactors, and...
Electric Vehicles (EVs) are being shown as a global solution in the path for reducing the carbon dioxide emissions and the avoidance of petrol energy problems. Actually, the Energy Storage Systems available are the great obstacle to a faster entrance of the EVs in the market. In fact, EVs applications need sources with high specific energy and high specific power, and currently, there are no available...
To develop high voltage circuit breaker (HVCB), numerical simulation is commonly used. These simulations are based on simplifying assumptions. One of the most commonly admitted hypotheses is local thermodynamic equilibrium (LTE). These hypotheses ensure reasonable calculation time but under severe conditions, some differences can be observed between simulations and laboratory tests. In this study,...
In this paper the generation system of electric energy for the aircrafts is observed that bases on a principle of changing an equivalent magnet gap in the synchronous generator with constant magnets (PMSM) excited by changing consumed reactive current by a 3-phase voltage source inverter (VSI). Such system, which generates energy with two principal parameters - double range of frequency deviation...
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