Steam turbine plant and operation method, combined cycle plant and operation method
AssigneeMitsubishi Power, Ltd.
InventorsDaiki FUJIMURA, Susumu SEKINE
Life of this patent
Estimating the term…
Abstract
A steam turbine plant and an operating method thereof, and a combined cycle plant and an operating method thereof, include: a turbine; steam supply lines that supply main steam to the turbine; a steam control valve and an intercept valve provided to the steam supply lines; and a first auxiliary steam supply line that supplies auxiliary steam to the turbine via the steam supply lines which are located farther downstream than the steam control valve and the intercept valve.
Claims16
A steam turbine plant comprising:
- a turbine;
- a main steam supply line that supplies main steam to the turbine;
- a control valve provided in the main steam supply line;
- and
- a first auxiliary steam supply line that supplies auxiliary steam to the turbine via the main steam supply line on a downstream side of the control valve.
A method for operating a steam turbine plant, the method comprising:
- a step of supplying auxiliary steam to a turbine from a downstream side of a control valve provided in a main steam supply line before a drive timing of a main steam generation source;
- a step of stopping a supply of the auxiliary steam to the turbine when or before a condition for supplying steam to the turbine is satisfied;
- and
- a step of starting a supply of main steam to the turbine when the condition for supplying the steam to the turbine is satisfied after the supply of the auxiliary steam to the turbine is stopped.
A method for operating a combined cycle plant including a gas turbine including a compressor, a combustor, and a turbine,
- a heat recovery steam generator that uses waste heat of flue gas from the gas turbine to generate steam, and
- a steam turbine plant driven by the steam generated by the heat recovery steam generator, the method comprising:
- a step of supplying auxiliary steam to a turbine from a downstream side of a control valve provided in a main steam supply line before a steam generation timing of the heat recovery steam generator, which is determined by ignition of the gas turbine;
- a step of stopping a supply of the auxiliary steam to the turbine when or before a condition for supplying the steam to the turbine is satisfied;
- and
- a step of starting a supply of main steam to the turbine when the condition for supplying the steam to the turbine is satisfied after the supply of the auxiliary steam to the turbine is stopped.
Dependencies are inferred from the claim text.