Method and apparatus for improved fault detection in power generation equipment
First Claim
1. A method for improving operational data measurements in an apparatus having a monitoring system, said monitoring system comprising a plurality of sensors, said method comprising:
- receiving from a sensor in said plurality of sensors a measurement by said sensor of an observed condition of said apparatus;
determining, via said monitoring system, a confidence level for said sensor as a function of said measurement;
determining, via said monitoring system, an estimate of said measurement as a function of said confidence level; and
using said estimate of said measurement for fault detection in said apparatus.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for detecting faults in power plant equipment is discloses using sensor confidence and an improved method of identifying the normal operating range of the power generation equipment as measured by those sensors. A confidence is assigned to a sensor in proportion to the residue associated with that sensor. If the sensor has high residue, a small confidence is assigned to the sensor. If a sensor has a low residue, a high confidence is assigned to that sensor, and appropriate weighting of that sensor with other sensors is provided. A feature space trajectory (FST) method is used to model the normal operating range curve distribution of power generation equipment characteristics. Such an FST method is illustratively used in conjunction with a minimum spanning tree (MST) method to identify a plurality of nodes and to then connect those with line segments that approximate a curve.
33 Citations
33 Claims
-
1. A method for improving operational data measurements in an apparatus having a monitoring system, said monitoring system comprising a plurality of sensors, said method comprising:
-
receiving from a sensor in said plurality of sensors a measurement by said sensor of an observed condition of said apparatus; determining, via said monitoring system, a confidence level for said sensor as a function of said measurement; determining, via said monitoring system, an estimate of said measurement as a function of said confidence level; and using said estimate of said measurement for fault detection in said apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An apparatus for improving operational data measurements in equipment having a monitoring system, said monitoring system comprising a plurality of sensors, said apparatus comprising:
-
means for receiving from a sensor in said plurality of sensors a measurement by said sensor of an observed condition of said apparatus; means for determining a confidence level for said sensor using said measurement; and means for determining an estimate of said measurement as a function of said confidence level. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A method for improving operational data measurements in an apparatus having a monitoring system, said monitoring system adapted to compare at least a first observed value associated with one operating characteristic of said apparatus to a normal operating range of that characteristic, said method comprising:
-
determining, via said monitoring system, a plurality of nodes from a set of training data, said nodes representing said normal operating range of said apparatus; connecting each node in said plurality of nodes with at least one other node in a way such that the sum of the length of said connections is a minimum, said connections forming a curve defining said normal operating range of said apparatus; and using said curve for fault detection in said apparatus. - View Dependent Claims (21, 22, 23, 24)
-
-
25. A monitoring system for detecting fault conditions in equipment comprising:
-
a first sensor in a plurality of sensors for taking a measurement of an observed condition of said equipment; means for determining a confidence level for said sensor using said measurement; and means for determining an estimate of said measurement as a function of said confidence level. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
-
Specification