WO2016099412A1 - A steam load shedding system - Google Patents
A steam load shedding system Download PDFInfo
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- WO2016099412A1 WO2016099412A1 PCT/TR2015/000317 TR2015000317W WO2016099412A1 WO 2016099412 A1 WO2016099412 A1 WO 2016099412A1 TR 2015000317 W TR2015000317 W TR 2015000317W WO 2016099412 A1 WO2016099412 A1 WO 2016099412A1
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- WIPO (PCT)
- Prior art keywords
- steam
- pressure
- turbine
- equipments
- load shedding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
Definitions
- the present invention relates to steam load shedding systems used in refineries.
- the rotary equipments in plants such as petroleum refineries may either be electrically- operated and/or steam-operated.
- turbine equipments are included as replacements of a number of rotary electrical equipments. Steam is used to actuate said turbine equipments. Therefore, steam is produced in said refineries at a certain pressure and at a certain amount. The amount of steam produced may vary according to the capacity of the refinery and the equipments used in the refinery.
- electrical equipments are deactivated whereas turbine equipments are activated, respectively.
- Said turbine equipments are steam turbines for rotating such equipments in the refinery as pump, fan, compressor, and which are connected to a shaft of these equipments.
- a steam load shedding system for preventing steam supply to at least one turbine equipment and/or at least one steam-consuming unit when a steam demand above the production capacity arises or the steam pressure decreases below a certain level in a refinery comprising a plurality of turbine equipments and at least one steam generator that generates steam at a certain pressure for actuating said turbine equipments, and a method of operation for the said steam load shedding system.
- Said load shedding system comprises a plurality of control valves each controlling the steam supplied to at least one turbine equipment and/or at least one steam- consuming unit; at least one pressure sensor measuring the pressure of the steam supplied to the said turbine equipments; and at least one control unit which closes said control valves successively based on a priority order in accordance with the pressure values measured by the said pressure sensor, so as to prevent steam supply to the turbine equipment and/or a steam-consuming unit connected with the closed control valve.
- Said load shedding method comprises the steps of controlling, by the control unit, whether the pressure value measured by the pressure sensor is at the level to operate all turbine equipments that must operate; and closing the control valves, by the control unit, successively based on a priority order so as to prevent steam supply to the turbine equipment and/or a steam-consuming unit connected with the closed control valve if the pressure value measured by the pressure sensor is below the pressure value to operate all turbine equipments that must operate.
- the refinery in case of a power loss in the refinery or a decrease in the steam pressure below the critical pressure levels, the refinery is allowed to operate safely, to keep control and to have the maximum number of the equipments and units that are of utmost importance remain activated.
- An object of the invention is to provide a steam load shedding system for shedding steam load, on equipment basis, in case of a decrease in the steam pressure or an increase in the steam demand above the production capacity in refineries comprising steam-operated turbine equipments, and a method of operation for the steam load shedding system.
- Another object of the present invention is to provide a steam load shedding system that ensures continuous operation of the equipments and units of critical importance for the refineries and a method of operation for the steam load shedding system.
- turbine equipments In plants such as petroleum refineries, turbine equipments are employed that are steam- actuated. In order to actuate said turbine equipments, steam is used at a certain pressure and amount. In case of an increase in the steam demand above the production capacity of the refinery (e.g. when the auxiliary turbine equipments are activated due to a power loss) or a decrease in the steam pressure (e.g. in case of a decrease in the production capacity due to deactivation of multiple steam generators), a problem of undesired shut-down of the turbine equipments is experienced. Particularly, such shut-down of the equipments of critical importance for the refinery may cause overall shut-down of the refinery and the risk of fire and explosion in the refinery due to uncontrolled shut-downs.
- a steam load shedding system for preventing shut-down of the equipments or units that are of critical importance for the refinery in case of an increase in the steam demand above the production capacity or a decrease in the steam pressure below a certain level, and a method of operation for the steam load shedding system.
- the steam load shedding system is suitable for use in a refinery comprising a plurality of turbine equipments and at least one steam generator that generates steam at a certain pressure in order to actuate said turbine equipments, and comprising a plurality of control valves each controlling steam supplied to at least one turbine equipment and/or at least one steam-consuming unit; at least one pressure sensor measuring the pressure of the steam supplied to the said turbine equipments; at least one control unit that closes the said control valves successively based on a priority order in accordance with the pressure values measured by the said pressure sensor in order to prevent steam supply to the turbine equipment and/or a steam-consuming unit connected with the closed control valve.
- Said priority order in the refinery is associated with the importance of the turbine equipment and/or steam-consuming unit to which steam supply will be prevented.
- steam supplied to a turbine equipment of low importance in the refinery is interrupted firstly whereas steam supplied to a turbine equipment of critical importance in the refinery is interrupted subsequently.
- said method of operation comprises the step of opening the closed control valve if the pressure value measured by the pressure sensor increases such that the control valve is able to operate the closed turbine equipment, after at least one control valve is switched to a closed position (i.e. after at least one equipment is deactivated by the system). In this manner, after the problem of an increase in steam demand of the refinery or a decrease in the steam pressure is solved, normal operation of the turbine equipments in the refinery is obtained.
- said control unit calculates, step by step, the amount of steam required to be excluded based on the decrease rate of the steam pressure, in order to keep the refinery steam pressure above a critical pressure level when the pressure value measured by the pressure sensor decreases below a predetermined threshold, and closes the control valves of the turbine equipments and/or stem-consuming units, according to the said priority order, so as to deactivate the equipments and reduce steam consumption of the units.
- the amount of steam required to be excluded based on the decrease rate of the steam pressure as well as the time delays between every two steps depending on the reaction of the steam generators have been defined.
- the number of the steam load shedding steps, the steam pressures determined in these steps, the amount of the steam to be excluded and time delays between two steps may vary depending on the decrease rate of steam.
- the value of the steam pressure determined in the first step which may be varied depending on the decrease rate of the steam pressure is 34 kg/cm 2
- the amount of load required to be excluded is 30 tones/h in order to keep the refinery steam pressure value above the determined level
- the waiting period is 15 seconds.
- the control unit determines the number of equipments whose total steam consumption amount exceeds 30 t/h based on the pre-determined priority order, and sends a signal for deactivation of said equipments.
- the control unit will send to the first 3 turbine equipments to a deactivation signal and steam-inlet control valves of the equipments will be closed. After this action, the control unit issues no signal for a certain delay period (i.e. 15 seconds). At the end of the said period, if the steam pressure of the refinery has not decreased below the critical steam pressure of the refinery determined in the second step, again no signal is issued.
- the steam load shedding system comprises at least one electric sensor which controls whether electricity is supplied to the electrical equipments which serve as replacements of the turbine equipments and which is connected with the said control unit.
- the priority order utilized by the control unit may vary depending on the existence of electricity in the electrical equipments. In this way, when the refinery has electricity, for example, and when the steam consumption exceeds the steam production and the steam generators do not satisfy such consumption so that the steam pressure reaches to the steam pressure value specified in the steps, the priority list of the turbine equipments will be varied according to the existence of electricity in the refinery and electrical equipments will be automatically activated instead of deactivated turbines.
- the steam load shedding system evaluates electricity and steam production-consumption balance in the refinery since it is controlled whether electricity is supplied to the electrical equipments, and determines, by means of the control unit, which unit in the refinery requires LP steam (low pressure steam), which unit requires MP steam (medium pressure steam) and which unit requires HP steam (high pressure steam), in accordance with a predetermined logic.
- the control unit closes the control valves, which control steam consumption, of the units determined based on the said determined logic and reduces steam consumption of these units, whose order of importance is determined beforehand, by means of the closed control valves.
- the steam supplied to the unit may be interrupted according to the priority order determined in advance. In this manner, steam consumption of the refinery is reduces, it is ensured that no drop takes place below the minimum steam pressure value required for turbine equipments and units, and thus deactivation of critical turbine equipments and units is prevented.
- the steam load shedding system comprises at least one user interface (i.e. a keyboard or a touch screen) for entering user commands in order to enable a user to use the steam load shedding system manually.
- Said user interface is connected with the control unit.
- a user may manually control which valves are to be closed, as needed.
- the user desires to close a valve, he inputs a relevant command through the said interface and the respective valve is closed by the control unit.
- the user inputs data on the amount of steam consumption and the control valves connected with the turbine equipments and/or steam-consumption units may be closed according to the said priority order such that the inputted steam consumption amount is satisfied. For example, when the user inputs a steam consumption amount of 35 t/h, the control valves connected with the turbine equipments and/or steam-consuming units that consume a steam amount of 35 t/h (or more) are closed according to the priority order.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
With the present invention, there is provided a steam load shedding system for preventing steam supply to turbine equipments and/or steam-consuming units in accordance with the steam demand in a refinery comprising a plurality of turbine equipments and/or at least one steam-consuming unit and a steam generator that generates steam, and a method of operation for the said steam load shedding system. The load shedding system comprises a plurality of control valves each controlling the steam supplied to turbine equipments and/or steam-consuming units; a pressure sensor measuring the pressure of the steam supplied to the turbine equipments; and a control unit which closes the control valves successively based on a priority order in accordance with the pressure values measured by the pressure sensor. The load shedding method comprises the steps of controlling, by the control unit, whether the pressure value measured by the pressure sensor is at the level to operate all turbine equipments that must operate; and closing the control valves, by the control unit, successively based on the priority order if the pressure value measured by the pressure sensor is below the pressure value to operate all turbine equipments that must operate.
Description
DESCRIPTION
A STEAM LOAD SHEDDING SYSTEM Field of the Invention
The present invention relates to steam load shedding systems used in refineries. Background Art
The rotary equipments in plants such as petroleum refineries may either be electrically- operated and/or steam-operated. For reliability of the refineries, turbine equipments are included as replacements of a number of rotary electrical equipments. Steam is used to actuate said turbine equipments. Therefore, steam is produced in said refineries at a certain pressure and at a certain amount. The amount of steam produced may vary according to the capacity of the refinery and the equipments used in the refinery. In a power loss in the refinery, electrical equipments are deactivated whereas turbine equipments are activated, respectively. Said turbine equipments are steam turbines for rotating such equipments in the refinery as pump, fan, compressor, and which are connected to a shaft of these equipments.
In refineries employing steam turbine equipments, as a result of an activation of auxiliary turbines due to a decrease in steam pressure and/or due to a power loss, the pressure of the steam in the refinery cannot ensure operation of all turbines. In this case, operation of some equipments in the refinery may be halted temporarily or continuously due to an inadequate steam pressure. Particularly, such undesired shut-downs of the equipments which are of critical importance for the refinery negatively affect the overall production of the refinery and increase the risk of fire and explosion that may occur in the refinery because of uncontrolled failures.
Brief Description of the Invention
With the present invention, there is provided a steam load shedding system for preventing steam supply to at least one turbine equipment and/or at least one steam-consuming unit
when a steam demand above the production capacity arises or the steam pressure decreases below a certain level in a refinery comprising a plurality of turbine equipments and at least one steam generator that generates steam at a certain pressure for actuating said turbine equipments, and a method of operation for the said steam load shedding system. Said load shedding system comprises a plurality of control valves each controlling the steam supplied to at least one turbine equipment and/or at least one steam- consuming unit; at least one pressure sensor measuring the pressure of the steam supplied to the said turbine equipments; and at least one control unit which closes said control valves successively based on a priority order in accordance with the pressure values measured by the said pressure sensor, so as to prevent steam supply to the turbine equipment and/or a steam-consuming unit connected with the closed control valve. Said load shedding method comprises the steps of controlling, by the control unit, whether the pressure value measured by the pressure sensor is at the level to operate all turbine equipments that must operate; and closing the control valves, by the control unit, successively based on a priority order so as to prevent steam supply to the turbine equipment and/or a steam-consuming unit connected with the closed control valve if the pressure value measured by the pressure sensor is below the pressure value to operate all turbine equipments that must operate. With the steam load shedding system and method of operation for the steam load shedding system according to the present invention, a maximum number of the turbine equipments of critical importance are kept activated by means of the amount of the steam that may be produced in the refinery. In this manner, in case of a power loss in the refinery or a decrease in the steam pressure below the critical pressure levels, the refinery is allowed to operate safely, to keep control and to have the maximum number of the equipments and units that are of utmost importance remain activated.
Object of the Invention An object of the invention is to provide a steam load shedding system for shedding steam load, on equipment basis, in case of a decrease in the steam pressure or an increase in the steam demand above the production capacity in refineries comprising steam-operated turbine equipments, and a method of operation for the steam load shedding system.
Another object of the present invention is to provide a steam load shedding system that ensures continuous operation of the equipments and units of critical importance for the refineries and a method of operation for the steam load shedding system. Description of the Invention
In plants such as petroleum refineries, turbine equipments are employed that are steam- actuated. In order to actuate said turbine equipments, steam is used at a certain pressure and amount. In case of an increase in the steam demand above the production capacity of the refinery (e.g. when the auxiliary turbine equipments are activated due to a power loss) or a decrease in the steam pressure (e.g. in case of a decrease in the production capacity due to deactivation of multiple steam generators), a problem of undesired shut-down of the turbine equipments is experienced. Particularly, such shut-down of the equipments of critical importance for the refinery may cause overall shut-down of the refinery and the risk of fire and explosion in the refinery due to uncontrolled shut-downs. Therefore, with the present invention, a steam load shedding system for preventing shut-down of the equipments or units that are of critical importance for the refinery in case of an increase in the steam demand above the production capacity or a decrease in the steam pressure below a certain level, and a method of operation for the steam load shedding system.
The steam load shedding system according to the present invention is suitable for use in a refinery comprising a plurality of turbine equipments and at least one steam generator that generates steam at a certain pressure in order to actuate said turbine equipments, and comprising a plurality of control valves each controlling steam supplied to at least one turbine equipment and/or at least one steam-consuming unit; at least one pressure sensor measuring the pressure of the steam supplied to the said turbine equipments; at least one control unit that closes the said control valves successively based on a priority order in accordance with the pressure values measured by the said pressure sensor in order to prevent steam supply to the turbine equipment and/or a steam-consuming unit connected with the closed control valve. Said priority order in the refinery is associated with the importance of the turbine equipment and/or steam-consuming unit to which steam supply will be prevented. For example, steam supplied to a turbine equipment of low importance in the refinery is interrupted firstly whereas steam supplied to a turbine equipment of critical importance in the refinery is interrupted subsequently. Thus, it is ensured that
turbine equipments of critical importance for the refinery are deactivated at the latest or if the pressure of the steam generated by the steam generator is sufficient to operate turbine equipments of high critical importance, after turbine equipments of lower importance are deactivated, then turbine equipments of high critical importance are operated continuously.
In the method of operation of the steam load shedding system according to the present invention, it is controlled, by the control unit, whether the pressure value measured by the pressure sensor is at the level to operate all turbine equipments that must operate, and if the pressure value measured by the pressure sensor is below the pressure value to operate all turbine equipments that must operate, the control valves are successively closed by the control unit based on the said priority order so as to prevent steam supply to the turbine equipment and/or the steam-consuming unit connected with the closed control valve. In a preferred embodiment of the invention, said method of operation comprises the step of opening the closed control valve if the pressure value measured by the pressure sensor increases such that the control valve is able to operate the closed turbine equipment, after at least one control valve is switched to a closed position (i.e. after at least one equipment is deactivated by the system). In this manner, after the problem of an increase in steam demand of the refinery or a decrease in the steam pressure is solved, normal operation of the turbine equipments in the refinery is obtained.
In an illustrative embodiment of the invention, said control unit calculates, step by step, the amount of steam required to be excluded based on the decrease rate of the steam pressure, in order to keep the refinery steam pressure above a critical pressure level when the pressure value measured by the pressure sensor decreases below a predetermined threshold, and closes the control valves of the turbine equipments and/or stem-consuming units, according to the said priority order, so as to deactivate the equipments and reduce steam consumption of the units. In the steps mentioned herein, the amount of steam required to be excluded based on the decrease rate of the steam pressure as well as the time delays between every two steps depending on the reaction of the steam generators have been defined. The number of the steam load shedding steps, the steam pressures determined in these steps, the amount of the steam to be excluded and time delays between two steps may vary depending on the decrease rate of steam. For example, assume that the value of the steam pressure determined in the first step
which may be varied depending on the decrease rate of the steam pressure is 34 kg/cm2, the amount of load required to be excluded is 30 tones/h in order to keep the refinery steam pressure value above the determined level, and the waiting period is 15 seconds. When the pressure value measured by the pressure sensors decreases below 34 kg/cm2, the control unit determines the number of equipments whose total steam consumption amount exceeds 30 t/h based on the pre-determined priority order, and sends a signal for deactivation of said equipments. In other words, assuming that the steam demand of the first five turbine equipments in the priority order is 8 t/h, 15 t/h, 9 t/h, 6t/h and 12 t/h, respectively. In this case, since the steam demand of the first three turbine equipments is 32 t/h, the control unit will send to the first 3 turbine equipments to a deactivation signal and steam-inlet control valves of the equipments will be closed. After this action, the control unit issues no signal for a certain delay period (i.e. 15 seconds). At the end of the said period, if the steam pressure of the refinery has not decreased below the critical steam pressure of the refinery determined in the second step, again no signal is issued. At the end of the said period, if the steam pressure of the refinery has decreased below the critical steam pressure, a number of equipments corresponding to the amount of load determined in the second step are determined again and the control unit sends to these equipments a deactivation signal. It is again waited until a time period corresponding to the delay time determined in the second step is passed, whereby it is determined whether the control unit will act or not. This procedure may be continued until it drops below the last critical steam pressure level of the refinery as determined in the said steps. Thus, the control unit is kept ready to operate continuously in order to keep the steam pressure value of the refinery above the steam pressure level determined in the steps. In an illustrative embodiment of the invention, the steam load shedding system comprises at least one electric sensor which controls whether electricity is supplied to the electrical equipments which serve as replacements of the turbine equipments and which is connected with the said control unit. In this embodiment, the priority order utilized by the control unit may vary depending on the existence of electricity in the electrical equipments. In this way, when the refinery has electricity, for example, and when the steam consumption exceeds the steam production and the steam generators do not satisfy such consumption so that the steam pressure reaches to the steam pressure value specified in the steps, the priority list of the turbine equipments will be varied according to the existence of electricity in the refinery and electrical equipments will be automatically
activated instead of deactivated turbines. In this embodiment, the steam load shedding system evaluates electricity and steam production-consumption balance in the refinery since it is controlled whether electricity is supplied to the electrical equipments, and determines, by means of the control unit, which unit in the refinery requires LP steam (low pressure steam), which unit requires MP steam (medium pressure steam) and which unit requires HP steam (high pressure steam), in accordance with a predetermined logic. The control unit closes the control valves, which control steam consumption, of the units determined based on the said determined logic and reduces steam consumption of these units, whose order of importance is determined beforehand, by means of the closed control valves. Furthermore, considering that when a power loss is experienced in a unit requiring both electricity and steam in order to operate, the unit will eventually stop, the steam supplied to the unit may be interrupted according to the priority order determined in advance. In this manner, steam consumption of the refinery is reduces, it is ensured that no drop takes place below the minimum steam pressure value required for turbine equipments and units, and thus deactivation of critical turbine equipments and units is prevented.
In an illustrative embodiment of the invention, the steam load shedding system comprises at least one user interface (i.e. a keyboard or a touch screen) for entering user commands in order to enable a user to use the steam load shedding system manually. Said user interface is connected with the control unit. In this embodiment, a user may manually control which valves are to be closed, as needed. When the user desires to close a valve, he inputs a relevant command through the said interface and the respective valve is closed by the control unit. In an alternative embodiment, the user inputs data on the amount of steam consumption and the control valves connected with the turbine equipments and/or steam-consumption units may be closed according to the said priority order such that the inputted steam consumption amount is satisfied. For example, when the user inputs a steam consumption amount of 35 t/h, the control valves connected with the turbine equipments and/or steam-consuming units that consume a steam amount of 35 t/h (or more) are closed according to the priority order.
With the steam load shedding system and method of operation for the steam load shedding system according to the present invention, a maximum number of the turbine equipments of critical importance are kept activated by means of the amount of the steam
that may be produced in the refinery. In this manner, in case of a power loss in the refinery or a decrease in the steam pressure below the critical pressure levels, the refinery is allowed to operate safely, to keep control and to have the maximum number of the equipments and units that are of utmost importance remain activated.
Claims
A steam load shedding system for preventing steam supply to at least one turbine equipment and/or at least one steam-consuming unit when a steam demand above the production capacity arises or the steam pressure decreases below a certain level in a refinery comprising a plurality of turbine equipments and/or at least one steam- consuming unit and at least one steam generator that generates steam at a certain pressure for actuating said turbine equipments and/or the steam-consuming unit, characterized by comprising:
- a plurality of control valves each controlling the steam supplied to at least one turbine equipment and/or at least one steam-consuming unit;
- at least one pressure sensor measuring the pressure of the steam supplied to the said turbine equipments;
- at least one control unit which closes said control valves successively based on a priority order in accordance with the pressure values measured by the said pressure sensor, so as to prevent steam supply to the turbine equipment and/or a steam-consuming unit connected with the closed control valve.
A steam load shedding system according to claim 1 , characterized by comprising at least one electric sensor which controls whether electricity is supplied to the electrical equipments which serve as replacements of the turbine equipments and which is connected with the said control unit.
A steam load shedding system according to claim 1 , characterized by comprising at least one user interface for receiving at least one user command, which is connected with the said control unit.
A method of operation for a steam load shedding system for preventing steam supply to at least one turbine equipment and/or at least one steam-consuming unit when a steam demand above the production capacity arises or the steam pressure decreases below a certain level in a refinery comprising a plurality of turbine equipments and at least one steam generator that generates steam at a certain pressure for actuating said turbine equipments, characterized in by comprising the steps of:
- controlling, by at least one control unit, whether the pressure value measured by at least one pressure sensor measuring the pressure of the steam supplied to the said turbine equipments is at the level to operate all turbine equipments that must operate;
- closing the control valves each controlling the steam supplied to at least one turbine equipment and/or at least one steam-consuming unit, by the control unit, successively based on a priority order and preventing steam supply to the turbine equipment and unit connected with the closed control valve if the pressure value measured by the pressure sensor is below the pressure value to operate all turbine equipments that must operate.
A method of operation according to claim 4, characterized by comprising the step of opening the closed control valve if the pressure value measured by the pressure sensor increases such that the control valve is able to operate the closed turbine equipment, after at least one control valve is switched to a closed position.
A method of operation according to claim 4, characterized by comprising steps of:
- comparing the pressure value measured by the said pressure sensor with a predetermined threshold;
- calculating the amount of steam used by the turbine equipments and/or steam- consuming units required to be deactivated based on the decrease rate of the steam pressure measured by the pressure sensor, if the pressure value measured by the pressure sensor is lower than the said threshold,
- closing the control valves according to the said priority order in accordance with the calculated steam amount.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR201415280 | 2014-12-17 | ||
| TR2014/15280 | 2014-12-17 |
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| Publication Number | Publication Date |
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| WO2016099412A1 true WO2016099412A1 (en) | 2016-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2015/000317 WO2016099412A1 (en) | 2014-12-17 | 2015-09-11 | A steam load shedding system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4069675A (en) * | 1976-03-16 | 1978-01-24 | Measurex Corporation | Method of optimizing the performance of a multi-unit power |
| US5388033A (en) * | 1993-09-22 | 1995-02-07 | Honeywell Inc. | Real time load allocation with additional constraints |
| DE102013001454A1 (en) * | 2013-01-29 | 2014-07-31 | Man Diesel & Turbo Se | Steam turbine for driving electrical generator to convert mechanical energy into electrical energy during expansion of steam, has controller controlling tapping pressure over control valve if tapping pressure is smaller than threshold value |
-
2015
- 2015-09-11 WO PCT/TR2015/000317 patent/WO2016099412A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4069675A (en) * | 1976-03-16 | 1978-01-24 | Measurex Corporation | Method of optimizing the performance of a multi-unit power |
| US5388033A (en) * | 1993-09-22 | 1995-02-07 | Honeywell Inc. | Real time load allocation with additional constraints |
| DE102013001454A1 (en) * | 2013-01-29 | 2014-07-31 | Man Diesel & Turbo Se | Steam turbine for driving electrical generator to convert mechanical energy into electrical energy during expansion of steam, has controller controlling tapping pressure over control valve if tapping pressure is smaller than threshold value |
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