About ten hydroelectric power plants realized from 1970 to 1990 in Romania are confronted with stator overheating. The developed mathematical model analyzes the voltage stability based on modal analysis of Jacobian matrix, identifying hazardous modes variation between and flow rate, correlated characteristics analyzed generators their response these variations. Vulnerable elements system for in...

This article analyzes the operation of hydro generators based on modes a hydroelectric power plant operating in Arctic zone Russian Federation. The main load hydropower is an aluminum smelter. nonlinear smelter powerful source harmonic disturbances. produces current and voltage distortions not only electrical networks but also those city generating busbars plant. As consequence, higher harmonic...

The article examines the main trends in use of renewable energy sources world. is associated with depletion reserves carbonaceous minerals and a decrease greenhouse gas emissions into atmosphere. presents main, according to authors, reasons for incorrect determination potential small hydro resources Republic Tajikistan. In recent years, many hydroelectric power plants have been built, which are...

Abstract Extreme values of strain signals are important for hydroelectric turbine runners fatigue assessment. However, due to measurements limitations such as short data length and limited subset measured operation conditions, the extreme rarely fully captured. Our study aims estimate runner at non-measured operating conditions by interpolating components from ones. The method is based on peaks...

abstract regarding temporal variation of rivers discharge and demands, for suitable use of dam reservoirs stored water, application of operation rule curves is necessary. operation rules are expressed with rule curves. application of yield model is one of the methods of operation curve preparation, which correlates reservoir operation with reservoir storage volume in first period. in this study...

The “Farkhod Hydroelectric Power Station” which was built in Syrdarya region has irrigated 700,000 hectares of fertile land Dalvarzin and Mirzachul districts Uzbekistan, Tajikistan Kazakhstan. “Andijan water reservoir” the Karadarya River Fergana Valley, a hydroelectric power plant with capacity 140,000,000 kilowatt-hours commissioned. Due to commissioning “Tuyamuyin” waterworks lower reaches A...