Control Philosophy:
- Injection steam line is provided with basket strainer, quick closing valve, and
pressure control valve. - Injection line and turbine mid stage section is provided with pressure and
temperature transmitters. - Turbine is operated in load control mode and / or flow control mode.
- During injection cycle, line pressure control valve is governed by target pressure
generated by external controller which in turn is linked to mid stage pressure. - In the event of grid outage, turbine trip valve and injection line trip valve is closed.
Process Mechanical Design: - Dual Injection (HP 14 kg/cm2 (a) & LP 2.5 kg/cm3 (a) Turbine
- Steam temp. at the inlet of turbine ESV. HP -460 Dec C & LP -185 Deg C
- Margin on TG Capacity (10%)
- Minimum expected load at which TG is expected to operate 30% MCR
- Top exhaust Turbine to reduce Civil cost & reduce construction time for Turbine
is planned