Dynamic Simulation of Starting and Emergency Conditions of a Hydraulic Unit Based on a Francis Turbine

The Francis hydro-turbine is a typical nonlinear system with coupled hydraulic, mechanical, and electrical subsystems. It difficult to understand the reasons for its operational failures, since main cause of failures due complex interaction three This paper presents an improved dynamic model hydro-turbine. study involves development hydraulic unit, given start-up emergency processes, consideration effect water hammer during transients. To accomplish objectives set, existing models used hydroelectric units are analyzed mathematical proposed, which takes into account dynamics abrupt changes in conditions. Based on these models, computer was developed, numerical simulation carried out assessment results obtained. built verified experimental model. As result, unit produced, factors processes