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| Number | Title | Issue Date |
| 7617681 | Method and means for controlling a flow through an expander A method and apparatus for controlling the flow of a working medium through an expansion device in a closed heating system which also includes a condenser, a pump and a boiler. The expansion device is a helical screw rotor expander that has an inlet port with an inl... | 11/17/2009 |
| 7055328 | Method and device for regulating the power output of a combined-cycle power station For regulating the power output of a combined-cycle power station, that power output fraction which is allocated to the uncoupling of distance heat is determined as a second desired value by adopting the mass flow or mass flows of a medium to be heated through one o... | 06/06/2006 |
| 7028479 | Method and device for operating a steam turbine comprising several no-load or light-load phases A method and a device are for operating a steam turbine in which includes several no-load or light-load phases. All phases are supplied with steam in order to ensure good preheating. The supply of a phase is selected in such a way that the phase produces the least p... | 04/18/2006 |
| 6929447 | Steam line closing valve and steam turbine plant comprising such a steam line closing valve The invention relates to a steam line closing valve for closing a steam line, especially in a steam turbine plant between a first partial turbine and at least one second partial turbine that is operated at a lower pressure than the first partial turbine. According t... | 08/16/2005 |
| 6647727 | Method for controlling a low-pressure bypass system In a method for controlling a steam turbine installation having a reheater (7) arranged between high-pressure turbine (2) and medium-pressure turbine (3) or low-pressure turbine (4), a low-pressure bypass (18) with a low-pressure bypass valve (19) also be... | 11/18/2003 |
| 6082110 | Auto-reheat turbine system An auto-reheat system for use with a steam turbine in which a portion of the heat energy supplied to the turbine from a heat source is directed to an ensuing region of the vapor path where the transiting vapor has expanded to such an extent that it begins... | 07/04/2000 |
| 5836162 | Feedwater heater drain recycle system A system for draining condensed steam from a closed high pressure feedwater heater installed in a steam turbine power generation cycle, and recycling the drains into the feedwater system at a point between the inlet to the main feedwater pump and an immed... | 11/17/1998 |
| 5442919 | Reheater protection in a circulating fluidized bed steam generator The final reheater in a circulating fluidized bed combustion system which is located in a separate fluidized bed heat exchanger and which would be subjected to hot solids without any cooling after a blackout or turbine is cooled by bleeding a portion of t... | 08/22/1995 |
| 5412252 | System and method for controlling turbine-generators based on whether cooling regulators are off-line Method and system for controlling the acceleration of a turbine-generator or limiting the load of the turbine-generator if a cooling regulator which regulates the cooling of the turbine-generator or auxiliary components is determined to be off-line.... | 05/02/1995 |
| 5044163 | Process and plant for generating steam using waste heat In plants for generating steam using waste heat, the heat in the hot waste gases flowing through the steam generator must be utilized with maximum efficiency. To this end, the feed water is branched into two streams, one of which flows into the high-press... | 09/03/1991 |
| 5038568 | System for reheat steam temperature control in circulating fluidized bed boilers A steam generator having a fluidized bed combustion system that includes a fluidized bed combustor and at least one hot separator, includes a superheater and a reheater with at least first and second or final stages disposed in a flue gas pass with the su... | 08/13/1991 |
| 4953355 | Steam turbine installation with adjusted bleeding A steam turbine installation with bleeding adjusted to a predetermined pressure P, the installation driving a load and including a bleed outlet disposed between two successive stages, wherein the bleed pressure P is adjusted over a range D of bleed rates ... | 09/04/1990 |
| 4920751 | System and method for reheat steam temperature control in circulating fluidized bed boilers A steam generator having a fluidized bed combustion system that includes a fluidized bed combustor and at least one hot separator, includes a superheater and a reheater with at least first and second or final (possibly more) stages disposed in a flue gas ... | 05/01/1990 |
| 4753077 | Multi-staged turbine system with bypassable bottom stage An improved multi-stage turbine system is provided which includes a high pressure turbine stage assembly and at least one lower pressure turbine stage assembly. Each of these turbine assemblies preferably has an inlet opening for introducing a thermodynam... | 06/28/1988 |
| 4693086 | Steam turbine plant having a turbine bypass system A reheat steam turbine power plant having a boiler with a superheater and reheater disposed therein, a high pressure steam turbine, an intermediate pressure steam turbine, a low pressure turbine, and a condenser condensing a steam exhausted through the lo... | 09/15/1987 |
| 4598551 | Apparatus and method for controlling steam turbine operating conditions during starting and loading A steam turbine-generator system includes a reheater bypass valve which cooperates with both a high- and low-pressure bypass valve in the early stages of turbine loading to divert steam in a bypass flow from a high-pressure turbine to the input of a rehea... | 07/08/1986 |
| 4576008 | Turbine protection system for bypass operation A steam turbine generator power plant which includes a main steam bypass path and an auxiliary steam bypass path which bypasses the high pressure turbine. The auxiliary bypass path includes a steam jet compressor which functions to pump up the pressure at... | 03/18/1986 |
| 4493186 | Steam power plant and steam generator, especially suited for a steam power plant of this type Steam power plant, including a steam turbine having a high pressure section with an exhaust steam outlet, a steam generator having a live steam side connected upstream of the high pressure section of the steam turbine, the steam generator having a combust... | 01/15/1985 |
| 4471620 | Turbine low pressure bypass spray valve control system and method A bypass system for a steam turbine wherein the energy level of the steam bypassed around the intermediate pressure and low pressure turbines is modified by introduction of cooling water. The amount of water introduced is adaptively varied as a function o... | 09/18/1984 |
| 4471446 | Control system and method for a steam turbine having a steam bypass arrangement A DEH (digital electrohydraulic) control system for a steam turbine generator having a steam bypass system. The turbine system includes a high pressure turbine having throttle and governor steam admission valves as well as an intermediate pressure turbine... | 09/11/1984 |
| 4461152 | Control apparatus for steam turbine In a steam turbine used with a power plant operated under variable pressure of the steam which is fed to the turbine through control valves, the control apparatus is arranged to control the control valves according to a signal obtained by adding an openin... | 07/24/1984 |
| 4455836 | Turbine high pressure bypass temperature control system and method A bypass system for a steam turbine wherein the temperature of the steam bypassed around the high pressure turbine is accurately controlled by measuring the inlet and outlet temperatures of the boiler reheater and generating an adaptive set point. The set... | 06/26/1984 |
| 4357803 | Control system for bypass steam turbines A control system for a steam turbine operated with a steam bypass system. In the control system, bypass valve control is according to setpoints generated as a function of a combined flow reference (CFR) signal. The CFR signal is representative of boiler o... | 11/09/1982 |
| 4324103 | Method and apparatus for regulating a steam turbine A method and apparatus for regulating a steam turbine comprising at least one resuperheater arranged between a high pressure section and a low pressure section and in which a reference-actual valve comparison of the rotational speed is performed to produc... | 04/13/1982 |
| 4297848 | Method of optimizing the efficiency of a steam turbine power plant A method is disclosed for improving the operational efficiency of a steam turbine power plant by governing the adjustment of the throttle steam pressure of a steam turbine at a desired power plant output demand value. In the preferred embodiment, the impu... | 11/03/1981 |
| 4292534 | Power and speed control device for a turbo-generator set The power and speed control device for a turbo-generator set of the invention has a generator, a turbine, and a governing valve with a positioning control input, for regulating steam fed to the turbine. The device includes a turbine speed controller, a tu... | 09/29/1981 |
| 4274259 | Superheated steam power plant with steam to steam reheater A desuperheater is disposed in a steam supply line supplying superheated steam to a shell and tube reheater.... | 06/23/1981 |
| 4274260 | Method and apparatus for regulating a steam turbine A method and apparatus for regulating a steam turbine comprising at least one resuperheater arranged between a high pressure section and a low pressure section and in which a reference-actual value comparison of the rotational speed is performed to produc... | 06/23/1981 |
| 4253308 | Turbine control system for sliding or constant pressure boilers An automatic control system enabling comprehensive operation of a reheat steam turbine with sliding or constant pressure boilers. The control system includes an HP control valve for regulating steam flow to the high-pressure turbine according to load and ... | 03/03/1981 |
| 4246491 | System and method for operating a steam turbine with digital computer control having setpoint and valve position limiting In a system and method for automatically starting, synchronizing and operating a steam turbine, turbine control including valve position limiting and means for generating a reference control signal representative of desired turbine operation, the referenc... | 01/20/1981 |
| 4149386 | System to control low pressure turbine temperatures An electronic system for operating a nuclear steam turbine power plant including a cycle steam reheater controller to control the heat transfer operation in a cycle steam reheater according to the steam and metal temperatures measured in one or more low p... | 04/17/1979 |
| 4132076 | Feedback control method for controlling the starting of a steam turbine plant The invention concerns a feedback control method for controlling the starting of a steam turbine unit comprising a reheater, a turbine by-pass system consisting of a HP-by-pass system and a LP-by-pass system, at least one regulating valve for the HP-by-pa... | 01/02/1979 |
| 4053786 | Transducer out of range protection for a steam turbine generator system Unnecessary fast valving action for load loss protection in a steam turbine generator system induced by partial transducer failure is minimized by the disclosedmethods and apparatus. Upon the occurrence of a mismatch between reheat pressure and electrical... | 10/11/1977 |
| 4042809 | System for controlling two variables Improvements in a control system which maintains both the speed and the extraction pressure of an extraction type steam turbine at respective set point values by adjusting both the high pressure admission valve and the low pressure stage admission valve. ... | 08/16/1977 |
| 4015430 | Electric power plant and turbine acceleration control system for use therein An electric power plant having dual turbine-generators and a steam source which includes a high temperature gas-cooled nuclear reactor. Each turbine includes a high pressure portion driven by superheat steam and a lower pressure portion driven by reheat s... | 04/05/1977 |
| 4007596 | Dual turbine power plant and method of operating such plant, especially one having an HTGR steam supply A power plant including dual steam turbine-generators connected to pass superheat and reheat steam from a steam generator which derives heat from the coolant gas of a high temperature gas-cooled nuclear reactor. Associated with each turbine is a bypass li... | 02/15/1977 |
| 4007597 | Power plant and system for accelerating a cross compound turbine in such plant, especially one having an HTGR steam supply An electric power plant having a cross compound steam turbine and a steam source that includes a high temperature gas-cooled nuclear reactor. The steam turbine includes high and intermediate-pressure portions which drive a first generating means, and a lo... | 02/15/1977 |
| 4007595 | Dual turbine power plant and a reheat steam bypass flow control system for use therein An electric power plant having dual turbine-generators connected to a steam source that includes a high temperature gas cooled nuclear reactor. Each turbine comprises a high pressure portion operated by superheat steam and an intermediate-low pressure por... | 02/15/1977 |
| 3998058 | Method of effecting fast turbine valving for improvement of power system stability As a improved way of effecting fast valving of turbines of power system steam-electric generating units for the purpose of improving the stability of power transmission over transmission circuits to which their generators make connection, when stability i... | 12/21/1976 |
| 3994137 | Method of and device for controlling a reheating steam turbine plant Improvements in or relating to a reheating steam plant comprising a main steam line connecting a heater to a higher pressure turbine through regulating valves, and a reheated steam line connecting the higher pressure turbine to an intermediate pressure tu... | 11/30/1976 |
