Method for turbine maintenance
First Claim
1. A process for initiating a maintenance procedure in a turbine comprising:
- recording a number of part load starts (PLS), base load starts (BLS), fast starts (FS), full speed no load trips (FSNLT), and trips (LT);
forming a weighted equivalent starts as a weighted summation of said PLS, said BLS, said FS, said FSNLT, and said LT;
comparing said weighted equivalent starts to a predetermined threshold and if said weighted equivalent starts exceeds said predetermined threshold, initiating said maintenance procedure.
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Accused Products
Abstract
A turbine and method for determining turbine maintenance. The method for determining hot gas path turbine maintenance comprises recording a number of part load starts (79), base load starts (89), fast starts (141), full speed no load trips (231), and load trips (237); forming a weighted equivalent starts as a weighted summation of part load starts, base load starts, fast starts, full speed no load trips, and load trips; comparing the weighted equivalent starts to a predetermined threshold; and initiating the maintenance procedure. The method for determining rotor parts turbine maintenance comprises recording the number of fast starts, normal starts (143), and elapsed time starts (135) from shutdown to restart; forming a weighted equivalent starts as a weighted combination of fast starts, normal starts, and elapsed time starts from shutdown to restart; comparing the weighted equivalent starts to a predetermined threshold; and if a weighted equivalent starts exceeds the predetermined threshold, initiating the maintenance procedure.
12 Citations
26 Claims
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1. A process for initiating a maintenance procedure in a turbine comprising:
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recording a number of part load starts (PLS), base load starts (BLS), fast starts (FS), full speed no load trips (FSNLT), and trips (LT); forming a weighted equivalent starts as a weighted summation of said PLS, said BLS, said FS, said FSNLT, and said LT; comparing said weighted equivalent starts to a predetermined threshold and if said weighted equivalent starts exceeds said predetermined threshold, initiating said maintenance procedure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for initiating a maintenance requirement in a turbine comprising:
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recording a number of fast starts (FS);
normal starts (NS); and
elapsed time starts (ET) from shutdown to restart;forming a weighted equivalent starts as a weighted combination of FS, NS, and ET; comparing said weighted equivalent starts to a predetermined threshold and if said weighted equivalent starts exceeds said predetermined threshold, initiating said maintenance procedure. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A turbine comprising:
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a part load starts counter for determining part load starts (PLS); a base load starts counter for determining base load starts (BLS); a full speed no load trips counter for determining full speed no load trips (FSNLT); a trips counter for determining load trips (LT); a normal starts counter for determining normal starts (NS); and an elapsed time detector for determining time between shutdown and restart (ET); a device for determining a first weighted equivalent starts as a weighted summation of said PLS, said BLS, said FS, said FSNLT, and said LT; a device for determining a second weighted equivalent starts as a combination of FS, NS, ET; a comparator capable of comparing said first weighted equivalent starts to a first predetermined threshold and if said first weighted equivalent starts exceeds said predetermined threshold initiating a first maintenance procedure; a second comparator capable of comparing said second weighted equivalent starts to a second predetermined threshold and if said second weighted equivalent starts exceeds said second predetermined threshold, initiating a second maintenance procedure. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification