Graphical user interface system for steam turbine operating conditions

• US 5,838,588 A
• Filed: 12/13/1996
• Issued: 11/17/1998
• Est. Priority Date: 12/13/1996
• Status: Expired due to Term

• Current Assignee: Siemens Corp. (Siemens AG)
• Original Assignee: Siemens Corporate Research Incorporated (Siemens AG)
• Inventors: Santoso, Nugroho Iwan, Zorner, Walter
• Primary Examiner(s): Arana, Louis M.
• Assistant Examiner(s): VO, HIEN XUAN
• Application Number:
  US08/768,047
• Time in Patent Office: 704 Days
• Field of Search: 364/557, 364/468.03, 364/468.04, 364/468.01, 364/528.22, 364/528.25, 345/145, 345/146, 345/340, 345/428, 345/915, 345/919, 345/920, 345/921, 345/970, 345/339
• US Class Current: 700/287
• CPC Class Codes: F01K 13/02 Controlling, e.g. stopping or starting

Abstract

A graphical user interface provides a real-time information display for a supervising engineer in charge of turbine operation so that critical parameter values and undesirable combinations of operating conditions are readily observed and deviations are made apparent so that corrective action can be initiated rapidly. An overview of the operating situation is made more readily apparent by representing the operating expansion and compression processes by lines on a Mollier enthalpy/entropy chart. In combination, real-time parameter values and parameter trends are also presented. Using the Mollier chart information in conjunction with trend and real-time information, the supervising engineer can more quickly identify and correct undesirable and potentially troublesome operation conditions.

Claims

1. In a system for monitoring steam turbine blade temperature utilizing measurement parameter values, a graphical user interface utilizing a computer for displaying a menu so as to allow selection for viewing of any of the following turbine diagram windows:

turbine overview;

HP turbine;

LP1 turbine;

LP2 turbine;

any other turbine included within the system;

wherein for each turbine, view windows selectable through said menu are provided, including;

turbine overview, actual on-line turbine condition on a Mollier diagram, and a trend diagram window;

said turbine overview window displaying a current value of blade temperature; and

said Mollier diagram and said actual turbine condition on said Mollier diagram being generated automatically by said computer based on thermodynamic calculations and blade temperature estimation by a hybrid artificial neural network.

2. A graphical user interface in accordance with claim 1, wherein said turbine overview view window displays other information deemed important for a user in making a decision concerning the control of said turbine.

3. A graphical user interface in accordance with claim 1, wherein said trend diagram view window allows the selection of up to ten diagrams.

4. A graphical user interface in accordance with claim 2, wherein said Mollier diagram is generated by said computer utilizing a routine which will generate a background Mollier grid, and then automatically overlay real time data derived from measurement parameter values and blade temperature utilizing said estimation by a hybrid artificial neural network.

5. A graphical user interface in accordance with claim 2, wherein said trend diagram view window allows the display of an exact value at a desired point within a graph by clicking on said desired point, whereby said exact value will be displayed under the corresponding axis.

6. A graphical user interface in accordance with claim 2, wherein said trend diagram view window allows a user to further analyze data by selecting `FREE GRAPHICS` which will give access to the complete data base.

7. A graphical user interface in accordance with claim 4, wherein said Mollier diagram view window has the capability for any and all of:

zooming within the enthalpy-entropy graph just by creating a box with the mouse enclosing the desired region;

displaying an instant mini trend diagram, which can be activated by clicking at the corresponding parameter value table/box;

by way of a Mollier option interface, providing user options to personalize viewing parameters; and

providing temperature thresholding which allows a user to set a certain threshold for activating a warning label and sending an alarm signal to an operator.

8. A graphical user interface for providing a real-time information display for a supervising engineer in charge of turbine operation so that critical parameter values and undesirable combinations of operating conditions are readily observed and deviations are made apparent so that corrective action can be initiated rapidly, said interface providing an overview of an operating situation, made more readily apparent by representing operating expansion and compression processes in real time by lines automatically generated on an automatically generated Mollier enthalpy/entropy chart based on thermodynamic calculations and blade temperature estimation by a hybrid artificial neural network, together with real-time parameter values and parameter trends.