"Higgins’ experience is that the early-warning system works well. To illustrate: During the pilot study, here’s what SmartSignal caught:
1. pH excursion in the HP steam drum of one HRSG caused by a bad sensor.
2. A disk-cavity cooling-air control valve on one of the gas turbines was showing “closed” even though it was 10% open, identifying a positioner problem.
3. A problem with the pilot fuel-gas control valve on one GT also was caused by a positioner issue.
4. A temperature excursion in one combustor was traced to a washer in that combustor.
5. The biggest catch: Identification of a flashback temperature problem on one gas turbine."
Regarding NV Energy
Higgins Generating Station
As Appeared in Combined Cycle Journal
2Q, 2009