Patent Document

BACKGROUND OF THE INVENTION 
       [0001]    The subject matter disclosed herein relates to power plant operation and in particular to responding to alarms that are triggered during operation of the power plant. 
         [0002]    Power plants generally include a number of machines that are operated to produce power or electricity. These machines may include a number of sensors that monitor components of the machines or operating parameters in order to ensure their proper operation. When a particular operating parameter falls outside of a preselected range, a set of logic will send an alarm to a control unit in order to alert an operator working at the control unit. Often, the plant developers do not have the benefit of observing mature operation of the power plant whereas the plant operator does, and no efficient mechanism exists to allow the operator&#39;s experience to improve future designs. Also, some of the alarms may be more critical to operation of the power plant than others. However, currently an alarm may be presented to the operator with the same level of urgency as any other alarm or may be assigned an alarm priority when alarm is designed. There is no way for the operator to categorize an alarm that increases the effectiveness of the operator in operating the power plant or to collect quantitative data related to the alarm for use in plant operation or plant development. 
       BRIEF DESCRIPTION OF THE INVENTION 
       [0003]    According to one aspect of the invention, a dynamic alarm system for operating a plant is provided that includes: a sensor configured to generate a signal related to a measurement of an operation of the plant; an interface configured to display a generated alarm to an operator and receive a dynamic rating value related to the generated alarm from the operator; and a processor configured to: generate the alarm using the generated signal, compile the rating value, and alter an operation of the plant from the compiled rating value. 
         [0004]    According to another aspect of the invention, a method of responding to an alarm at a power plant is provided that includes: receiving one or more alarms related to an operation of the power plant; dynamically rating the one or more alarms to obtain one or more rating values; compiling the one or more rating values; determining a relevance of a selected alarm to the operation of the power plant from the compiled rating values; and altering an operation of the power plant using the determined relevance. 
         [0005]    According to yet another aspect of the invention, an apparatus for responding to an alarm at a plant is provided that includes: a control panel configured to receive one or more alarms related to an operation of the plant; an interface configured to receive a dynamically selected rating value related to the one or more alarms; and a processor configured to: compile the dynamically selected rating values, determine a relevance of a selected alarm to operation of the plant from the compiled rating values, and alter an operation of the plant from the determined relevance. 
         [0006]    These and other advantages and features will become more apparent from the following description taken in conjunction with the drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
         [0007]    The subject matter, which is regarded as the invention, is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which: 
           [0008]      FIG. 1  shows a schematic diagram of an exemplary alarm system that may provide an alarm related to an operating unit or system; 
           [0009]      FIG. 2  shows an exemplary display that may be presented to an operator at the user interface of the control system; 
           [0010]      FIG. 3  shows a system of power plant facilities that may operate use the exemplary alarm system disclosed herein; and 
           [0011]      FIG. 4  shows a flowchart illustrating an exemplary method of responding to an alarm. 
       
    
    
       [0012]    The detailed description explains embodiments of the invention, together with advantages and features, by way of example with reference to the drawings. 
       DETAILED DESCRIPTION OF THE INVENTION 
       [0013]      FIG. 1  shows a schematic diagram of an exemplary alarm system  100  that may generate an alarm related to an operating a power plant  104 . While the disclosure is discussed with respect to a power plant, in alternate embodiment, the alarm system by be used with any suitable system or machine. The exemplary alarm system  100  includes a plurality of sensors  102   a - 102   n  that is coupled to various components of the power plant  104 . In the exemplary embodiment of a power plant system, these components may include a gas turbine generator, including compressor section, combustor and turbine section, a power grid, a heating and/or cooling unit, etc. Exemplary operating parameters of the power plant may include a pressure, a switch position, a rotation rate, a temperature, a fuel consumption rate or any other parameters suitable for operation of the power plant. The plurality of sensors  102   a - 102   n  may be coupled to control system  105 . A selected sensor such as sensor  102   a  may send a signal to the control system  105  when an operating parameter monitored by the sensor falls outside of a preselected range. In an exemplary operation of the power plant  104 , the number of sensors  102   a - 102   n  may number in the hundreds or even thousands which may generate a corresponding number of alarms during the operation of the power plant  104 . 
         [0014]    The control system  105  may include a processor  107  that runs a set of programs  109  suitable for operation of the alarm system  100 . The processor  107  may be in communication with a user interface  112  and with a database or memory  111 . In an exemplary embodiment, the processor  107  receives a signal or an alarm from at least one of the sensors  102   a - 102   n , processes the signal or alarm to determine an alarm state, and presents the alarm state to a user interface  112  along with a corresponding rating system. An operator at the interface  112  may dynamically rate the alarm state. The processor  107  may further receive a rating value related to the alarm state from the user interface  112  and store the rating value in the memory  111 . In an exemplary embodiment, the memory  111  may store a plurality of rating values corresponding to a selected alarm state. The processor  107  may access the plurality of alarm rating values and perform an evaluation or analysis of the selected rating to determine a relevance of the alarm towards operation of the power plant  104 . The memory  111  may further be accessible to one or more developers  120  that may use the ratings stored therein to perform several operations. For example, the developers  120  may alter a presentation of a selected alarm state to the operator at the interface  112  based on the rating value corresponding to the selected alarm, for instance, by changing a program setting or parameter related to the alarm. Also, the developers may alter an operation of the power plant  104  or an operation of the alarm system  100  or to alter sensors  102   a - 102   n , such as by removing a sensor, adding a sensor, changing a placement of a sensor, changing a sensitivity or alarm threshold of a sensor, etc. 
         [0015]      FIG. 2  shows an exemplary display  200  that may be presented to an operator at the user interface  112  of the control system  105 . The exemplary display  200  includes a plurality of columns  202 ,  204  and  206  related to alarm parameters. A first column  202  or set of columns may present the alarm entry to the operator indicating the alarm type, alarm identification, power plant component and other informative data. A second column  204  provides a rating system for the operator. The rating system may be a graduated scale, such as a scale ranging between two numeric limits such as from 1 to 10 or from 1 to 5, for example. Alternatively, the rating system may be a Boolean rating system, wherein the operator may select one of two values, i.e., YES/NO, +/−, relevant/not relevant, etc. In an exemplary embodiment, the operator receives the alarm and rates the alarm dynamically, i.e., during a response to the alarm or during acknowledgement of the alarm. In general, the operator rates the alarm based on a perceived urgency of the alarm or a relevance of the alarm to the operation of the power plant  104 . In one aspect, the interface  112  allows the operator to acknowledge the alarm and rate the alarm simultaneously. For example, the operator may select “Acknowledge +” to simultaneously acknowledge the alarm and to provide a positive rating value for the alarm. Similarly, the operator may select “Acknowledge −” to simultaneously acknowledge the alarm and to provide a negative rating value for the alarm. Additionally, the alarm system may obtain the rating value from the operator before allowing the operator to perform an action related to the alarm. A third column  206  includes one or more text boxes corresponding to the alarms in column  204  that allow the operator to provide comments with respect to a rating value and/or explaining the selected rating value. 
         [0016]    In one embodiment, the alarms may be prioritized, filtered or sorted at the user interface based on the rating values of the alarms, which may be based on the accumulated rating each alarm has received during prior acknowledgements. Additionally, the processor  107  may be used to sort out irrelevant alarms based on prior rating values. For example, the processor  107  may sort out an alarm that is rated below a selected level on the graduated scale, such as a rating less than 3. 
         [0017]    The present disclosure therefore provides a method for collecting quantitative data from operators about each alarm. The data may then be used when designing controls for future power plants or to eliminate the recurrence of alarms deemed to be a nuisance or of little value, incorrect timing, etc. without changing an underlying alarm code. 
         [0018]      FIG. 3  shows a system  300  of power plant facilities that may operate using the exemplary alarm system disclosed herein. In an exemplary embodiment, the power plant facilities  302   a - 302   n  are separate facilities. Each power plant facility may have its own alarm system. In the exemplary system  300 , alarm rating values obtained at the plurality of power plant facilities  302   a - 302   n  are aggregated at common memory location  305 . The common memory location  305  may be accessible to one or more developers. The one or more developers may use the aggregated rating values to performing various operations at the plurality of power plants  302   a - 302   n . In an exemplary embodiment, the developers may determine which alarms may be modified for the power plant facilities as well as which alarms may be modified at a particular power plant facility. 
         [0019]      FIG. 4  shows a flowchart illustrating an exemplary method of responding to an alarm at a power plant facility. In Block  402 , an operator receives an alarm generated by a sensor that is related to operation of a power plant facility. In Block  404 , the operator rates the alarm during acknowledgement of the alarm or while taking an action with respect to the alarm. In Block  406 , a plurality of rating values for the alarm is compiled in a database. In Block  408 , these compiled rating values are used to alter an operation of the alarm system or of the power plant facility, such as changing a presentation of the alarm at the user interface, changing a sensitivity of a sensor, changing an operation of the power plant facility, etc. 
         [0020]    While the invention has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the invention is not limited to such disclosed embodiments. Rather, the invention can be modified to incorporate any number of variations, alterations, substitutions or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the invention. Additionally, while various embodiments of the invention have been described, it is to be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.

Technology Category: 3