| 摘要 |
The present invention relates to a control system for controlling injection and extraction of steam in a steam turbine (1), the same valves (5, 6) being used both for injection of steam to the turbine (1) and for extraction of steam from the turbine (1). The valves (5, 6) commonly used for injection and extraction are controlled to be timely opened and closed in dependence on the pressure conditions at injection points (2, 3) and extraction points (2, 3), respectively, in the turbine and on the pressure (P3) prevailing in a process network connected to the valves (5, 6) such that injected or extracted steam is utilized in an optimal manner. |
