advanced
Journal Information
Journal Information
   Description
   Editorial Board
   Guide for Authors
   Ordering

Contents Services
Contents Services
   Regular Issues
   Special Issues
   Authors Index

Links
Links
   FEI STU Bratislava
   SAS Bratislava

   Feedback

[2, 2015] 

Journal of Electrical Engineering, Vol 66, 2 (2015) 103-107 DOI: 10.1515/jee-2015-0016

INFLUENCE OF INTERCEPT VALVES ON CONTROL OF MULTIPLE STAGES STEAM TURBINES DURING THE SWITCHING INTO THE ISLAND OPERATION

Ladislav Laštovka – Pavla Hejtmánková

   This paper presents control of a multiple stages steam turbine which is switched into the island operation. The frequency in an electrical grid is stated on nominal value which is in UCTE grid 50 Hz. When deviation of frequency is higher then 0.2 Hz, the switching of particular steam units into the island operation is only the chance how to maintain the supply of, at least, some small grids. The other possibility how to keep power units in operation, to be prepared for the next synchronization to the grid, is to switch them to operation status in which they supply only their self-consumption. This change of the operating state is the most dynamic load change for the control system of the unit. The multiple stages turbines are equipped with high pressure hydraulic valves for steam turbine governing. Influence of the intercept valve on steam turbine control during the switching process into the island operation is examined in Matlab Simuling software.

Keywords: island operation, steam turbine model, steam turbine control, control valve, intercept valve


[full-paper]


© 1997-2019  FEI STU Bratislava