Turbine control unit comprising a thermal stress controller as a master controller
US-2017241285-A1 · Aug 24, 2017 · US
Steam turbine control
US11047263B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11047263-B2 |
| Application number | US-201816647248-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 22, 2018 |
| Priority date | Sep 22, 2017 |
| Publication date | Jun 29, 2021 |
| Grant date | Jun 29, 2021 |
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- Title
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Abstract
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A method for operating a steam turbine where steam turbine has at least two sub-turbines, wherein the steam turbine is paired with a steam turbine controller which has a sub-turbine controller for each of the sub-turbines, and each sub-turbine controller compares respective target values with respective actual values of the respective sub-turbine during operation in order to determine a respective control deviation for each sub-turbine.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for operating a steam turbine, wherein the steam turbine has at least two subturbines, wherein the steam turbine has an associated steam turbine controller that has one subturbine controller for each of the subturbines, the method comprising: comparing, via each subturbine controller, respective setpoint values with respective actual values of the respective subturbines during operation in order to determine a respective control error for the respective subturbine, wherein the subturbine controllers operate the respective subturbines according to different modes of operation, wherein a respective power value is set in one of the modes of operation using one of the subturbine controllers, actuating, via the subturbine controllers, respective turbine valves that are associated with the respective subturbines, controlling, via the respective turbine valves, individual process variables comprising pressure of the respective subturbine, power of the subturbine, and thermal stress or drop in thermal stress of the subturbine, independently of one another. 2. The method as claimed in claim 1 , wherein a respective pressure value is set in one of the modes of operation using one of the subturbine controllers. 3. The method as claimed in claim 1 , wherein a respective temperature value is set in one of the modes of operation using one of the subturbine controllers. 4. The method as claimed in claim 1 , wherein the respective subturbine controllers used are PID controllers. 5. A steam turbine, comprising: at least two subturbines, and a steam turbine controller associated with the at least two subturbines, the steam turbine controller comprising one subturbine controller for each of the at least two subturbines, wherein each subturbine controller is designed to compare respective setpoint values with respective actual values of the respective subturbine during operation in order to determine a respective control error for the respective subturbine, wherein the subturbine controllers are designed to operate the respective subturbines according to different modes of operation, wherein one of the subturbine controllers is designed to set a respective power value in one of the modes of operation, wherein the subturbine controllers are designed to actuate respective turbine valves that are associated with the respective subturbines, wherein the respective turbine valves control individual process variables comprising pressure of the respective subturbine, power of the subturbine, and thermal stress or drop in thermal stress of the subturbine, independently of one another. 6. The steam turbine as claimed in claim 5 , wherein one of the subturbine controllers is designed to set a respective pressure value in one of the modes of operation. 7. The steam turbine as claimed in claim 5 , wherein one of the subturbine controllers is designed to set a respective temperature value in one of the modes of operation. 8. The steam turbine as claimed in claim 5 , wherein the respective subturbine controllers are PID controllers. 9. A steam turbine controller for a steam turbine having at least two subturbines, the steam turbine controller comprising: one subturbine controller for each of the at least two subturbines, wherein each subturbine controller is designed to compare respective setpoint values with respective actual values of the respective subturbine during operation in order to determine a respective control error for the respective subturbine, wherein the subturbine controllers are designed to operate the respective subturbines according to different modes of operation, wherein one of the subturbine controllers is designed to set a respective power value in one of the modes of operation, wherein the subturbine controllers are designed to actuate respective turbine valves that are associated with the respective subturbines, wherein the individual turbine valves control individual process variables comprising pressure of the respective subturbine, power of the subturbine, and thermal stress or drop in thermal stress of the subturbine, independently of one another.
Assignees
Inventors
Classifications
Control or safety means specially adapted therefor · CPC title
- F01K7/08Primary
Control means specially adapted therefor · CPC title
proportional-integral-differential · CPC title
by means of valves, e.g. for steam turbines (valves in general F16K) · CPC title
Pressure · CPC title
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Frequently asked questions
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- What does patent US11047263B2 cover?
- A method for operating a steam turbine where steam turbine has at least two sub-turbines, wherein the steam turbine is paired with a steam turbine controller which has a sub-turbine controller for each of the sub-turbines, and each sub-turbine controller compares respective target values with respective actual values of the respective sub-turbine during operation in order to determine a respect…
- Who is the assignee on this patent?
- Siemens Ag, Siemens Energy Global Gmbh & Co Kg
- What technology area does this patent fall under?
- Primary CPC classification F01K7/08. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 29 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).