Experience in operating units with diagonal-flow turbines: Fid-Bau Portal

Experience in operating units with diagonal-flow turbines

Loktinov, S. N. / Trubitsyn, V. N.

Conclusions The diagonal-flow, adjustable-blade turbines of the Zeya hydrostation during operation at low starting heads showed a high level of reliability. The use of diagonal-flow turbines permits eliminating the installation of interchangeable runners during the first years of operation and increases the efficiency of the hydrostation with deep regulation of the reservoir.As a consequence of the design features of diagonal-flow turbines the cavitation erosion of the blades and waterway of the turbines is negligible even at low heads. As tests showed, the state of vibration of the units is satisfactory and the stresses in the essential components of the runner do not exceed the norm. The turbines were repaired with minimum expenses and in a short time.Failures of the auxiliary equipment of the units do not cause emergency situations and are eliminated during operation.Component-by-component assembly of the diagonal-flow turbines at the site of installation is performed with excellent quality.The experience of assembling and operating the diagonal-flow turbines at the Zeya hydrostation confirms the possibility of creating high-capacity adjustable-blade turbines for heads up to 150 m.