Feasibility study of asynchronous generator at Kruonis pumped storage plant

Abstract

Variable speed turbine with asynchronous generator is planned to build in Kruonis Pumped Storage Plant for plant schedule chart improvement. The fifth unit with variable speed turbine and asynchronous generator is planned to install under revised National Energy Strategy project. Variable speed turbine with asynchronous generator of 250 MW maximum power has been analyzed in this article. The purpose of this experimental study is to determine relation between asynchronous generator‘s electrical, mechanical and hydraulic parameters. Mathematical model of asynchronous generator and excitation control system had been created. Variation of generator‘s rotor speed due to height differences in reservoirs and also active, reactive power characteristic dependence of pump and turbine operating regimes has been taken in consideration. Experimental study has been executed on the basis of classical theory of asynchronous machines with phase-wound rotor.