<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

Influence of Intercept Valves on Control of Multiple Stages Steam Turbines During the Switching into the Island Operation

Faculty of Electrical Engineering of the University of West Bohemia, Univerzitní 8, 306 14, Pilsen, Czech Republic

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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...

Influence of Intercept Valves on Control of Multiple Stages Steam Turbines During the Switching into the Island Operation

Published Online: May 15, 2015

Page range: 103 - 107

Received: Jul 20, 2014

DOI: https://doi.org/10.1515/jee-2015-0016

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

© Faculty of Electrical Engineering and Information Technology, Slovak University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Influence of Intercept Valves on Control of Multiple Stages Steam Turbines During the Switching into the Island Operation

Published Online: May 15, 2015

Page range: 103 - 107

Received: Jul 20, 2014

DOI: https://doi.org/10.1515/jee-2015-0016

Keywordsisland operation, steam turbine model, steam turbine control, control valve, intercept valve

© Faculty of Electrical Engineering and Information Technology, Slovak University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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