LOW-FREQUENCY CHANNEL FACILITIES FOR THE ELECTRICAL MELTING OF LOW-POWER METALS

J. DAVIDYAN, P. MANUKYAN, A. HARUTYUNYAN
(Armenia)

A new design of low-frequency channel facility is proposed, for smelting of fusible non-ferrous low-power metals with a submersible magnetic core. This design has advantages over the facilities made of traditional schemes. The dependences of the power and productivity of the furnace, as well as the resistance of closed loop of the metal, from the design, the geometric dimensions of the bath, weight and type of metal that can be used for engineering calculations.

INFRALOW FREQUENCY ENERGY CONVERTERS

J. DAVIDYAN, R. GASPARYAN
(Armenia)

Semi-conductor switching transducer of 50 Hz mains voltage into a sinusoidal voltage of infralow frequency, as well as one of its applications for mixing the melt in induction crucible installations of high-frequency fusion of metals are considered.

OPTIMAL PLANNING OF OPERATIVE RESERVE OF ACTIVE POWER IN POWER SYSTEM UNDER CONDITIONS OF UNCERTAINTY 

D.JAPARIDZE,  T.MAGRADZE
(Georgia)

The necessity of optimal planning of active power’s operative reserve’s in power system and corresponding world experience is proved and studied. It’s developed a general probabilistic assessment algorithm of the active power delay and based on  fuzzy logic method worked out a assessment methodology of overall required reliability and accepted risk level of power system and individual load nodes. It’s developed the algorithm for determining the amount of the hourly active power operative reserve of power system. Distribution of  optimal operative reserve on parallel working generators and hourly power flow calculation in normal and emergency modes are done. Based on calculations if in power system at certain time interval there exists overloaded transmission line it’s made optimization function with constraints and algorithm, which distributes and recalculates power flow in a way that in normal and emergency modes overloaded transmission line will be unloaded. For the practical testing of above created new method for example it’s exemined power system and results are got.