Power construction Print E-mail
Thursday, 17 March 2011 16:44

RESULTS OF THE ANALYSIS OF LONG-TERM RESEARCH OF TEMPERATURE PERMEABILITY FACTOR OF ENGURI HYDROPOWER PLANT DAM CONCRETE

P. CHICHAGUA
(Georgia)

Values of temperature permeability factor of Enguri hydropower plant dam concrete included in its technical and operational projects, technical conditions of concrete and cement, technical conditions of concrete work performance at the units, technical project “complex of the activities for regulating temperature conditions of the dam” determined experimentally under lab conditions at hydraulic structure research department and under field conditions at field observations department of Georgian Scientific-Research Institute of Power Engineering and Power Structures, indicated in common normative documents, well-known books of Soviet Union and Georgia, are reviewed.

Comparative analysis showed that all the mentioned data satisfyingly match one another.

Recommendation as to under what limits it is possible to obtain the mentioned thermotechnical property of this structure in provided in the summery.



EQUATIONS INTERCONNECTING EMERGENCY CURRENTS OCCURRED DURING CONCURRENT SYMMETRIC AND ASYMMETRIC SHORT CIRCUIT WITHIN ANY POWER SYSTEM NETWORK

N.TURKIA, V.BANTSADZE, V.AKHALADZE
(Georgia)

Interconnecting the equations of emergency currents occurred during concurrent symmetric and asymmetric short circuit within the power system network are obtained. The amount of symmetric short circuits concurrently occurred within the power system network is presented in the networks by switching on such two ideal type voltages (electromotive forces) which are equal to each other in size though are directed reversely.

Equation system is drafted and its solution allows to get direct succession current values at the damage points. For the calculation unification purposes, all the forms of short circuits are considered as the result of one-phase short circuit superposition, and three-phase short circuits – as three one-phase short circuit superposition. Various combinations of concurrently acting asymmetric short circuits are calculated.

Last Updated on Friday, 18 March 2011 13:35
 
Copyright © 2024 EnergyOnline. All Rights Reserved.