# US 8,770,914 B2 · Steam turbine system and method for operating a steam turbine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,914 B2 - Document ID: US8770914B2 - Status: Granted - Kind: B2 - Application number: 13/054,228 - Filed: 2009-07-16 - Published: 2011-08-04 - Granted: 2014-07-08 - Earliest claimed: 2008-07-16 - Assignees: Siemens Aktiengesellschaft - Applicants: Jörg Eppendorfer; Bernd Leidinger; Markus Mantei - Inventors: Jörg Eppendorfer; Bernd Leidinger; Markus Mantei - Web page: https://patentgrep.com/patent/US8770914B2 ## CPC - F01D 1/023: {the working-fluid being divided into several separate flows (F01D3/02 takes precedence); several separate fluid flows being united in a single flow; the machine or engine having provision for two or more different possible fluid flow paths} - F01D 25/12: Cooling - F01K 7/20: Control means specially adapted therefor - F05D 2260/2322: steam - F05D 2270/3032: excessive temperatures, e.g. caused by overheating - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F01K: STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; nuclear power plants, engine arrangements therein G21D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A steam turbine system including a steam turbine is provided. The steam turbine system includes a high-pressure side steam inlet device, a low-pressure side steam device, and a control device for controlling the steam turbine. An additional steam inlet device is also included arranged between the high-pressure side steam inlet device and the low-pressure side steam device. The control device control a supply of steam via the additional steam inlet device as a function of operating parameters detected at the steam turbine system. ## Claims ### Claim 1 A steam turbine system including a steam turbine, comprising: a high-pressure side steam inlet device; a low-pressure side steam outlet device; a control device for controlling the steam turbine; an additional steam inlet device, arranged between the high-pressure side steam inlet device and the low-pressure side steam outlet device, wherein the control device is designed to control a supply of steam for power generation via the additional steam inlet device as a function of operating parameters detected at the steam turbine system, wherein the detected operating parameters include a temperature measure in a low-pressure section of the steam turbine, and wherein the control device is configured to effect a supply of steam for power generation via the additional steam inlet device when a certain temperature increase is detected in the low-pressure section of the steam turbine. ### Claim 2 (depends on 1) The steam turbine system as claimed in claim 1, wherein conditioned steam is provided for supply via the additional steam inlet device. ### Claim 3 (depends on 1) The steam turbine system as claimed in claim 1, wherein the supply of steam is effected via the additional steam inlet device when a low-load operation of the steam turbine is detected. ### Claim 4 (depends on 1) The steam turbine system as claimed in claim 1, wherein the supply of steam is also controlled via the high-pressure side steam inlet device as a function of the operating parameters detected at the steam turbine system. ### Claim 5 (depends on 1) The steam turbine system as claimed in claim 1, wherein the detected operating parameters furs per include a torque measured at a turbine rotor. ### Claim 6 (depends on 1) The steam turbine system as claimed in claim 1, wherein a special operating mode with a controlled supply of steam is activated via the additional steam inlet device when a first set of activation criteria exist, and is deactivated again when a second set of deactivation criteria exist. ### Claim 7 (depends on 6) The steam turbine system as claimed in claim 6, wherein the special operating mode is activated when a low-load operation of the steam turbine is detected, in which mode a controlled supply of steam takes place via the additional steam inlet device and an increase in the mechanical power consumption of the system components driven by the steam turbine is effected. ### Claim 8 (depends on 7) The steam turbine system as claimed in claim 7, wherein the increase in the mechanical power consumption of the system components driven by the steam turbine is used to pre-heat a condensate in a circuit of the system constructed as a condensing steam turbine system. ### Claim 9 (depends on 1) The steam turbine system as claimed in claim 1, wherein an injection of water in an exit region of the steam turbine is also activated as a function of the operating parameters detected at the steam turbine system. ### Claim 10 (depends on 1) The steam turbine system as claimed in claim 1, wherein in a special operating mode in which a controlled supply of steam takes place via the additional steam inlet device, safety monitoring with regard to a temperature measured in a low-pressure section of the steam turbine takes place and the steam turbine is switched off when predetermined danger criteria are fulfilled. ### Claim 11 (depends on 1) The steam turbine system as claimed in claim 1, wherein at least some of a plurality of rotor vanes and/or a plurality of guide vanes in a low-pressure section of the steam turbine are produced in a lightweight design. ### Claim 12 (depends on 11) The steam turbine system as claimed in claim 11, wherein the lightweight design comprises a fiber composite material. ### Claim 13 A method for operating a steam turbine, comprising: providing a high-pressure side steam inlet device, a low-pressure side steam inlet device and an additional steam inlet device; arranging the additional steam inlet device between the high-pressure side steam inlet device and the low-pressure side steam inlet device; and controlling a supply of steam for power generation via the additional steam inlet device as a function of detected operating parameters, wherein the detected operating parameters include a temperature measure in a low-pressure section of the steam turbine, and wherein the supply of steam for power generation is effected via the additional steam inlet device when a certain temperature increase is detected in the low-pressure section of the steam turbine. ### Claim 14 (depends on 13) The method as claimed in claim 13, wherein conditioned steam is provided for supply via the additional steam inlet device. ### Claim 15 (depends on 13) The method as claimed in claim 13, wherein the supply of steam is effected via the additional steam inlet device when a low-load operation of the steam turbine is detected. ### Claim 16 (depends on 13) The method as claimed in claim 13, wherein the supply of steam is also controlled via the high-pressure side steam inlet device as a function of operating parameters detected at the steam turbine. ### Claim 17 (depends on 13) The method as claimed in claim 13, wherein the detected operating parameters further include a torque measured at a turbine rotor.