Abstract: . . .  conditions from the various “smart modules” (for example the presence of a twice per rev vibration detected by the vibration module), and final diagnosis from the expert system. The master database sores simple scalar data. Complex dynamic data for a Oracle Database Managment System HydroTrac MicroDAU User Interface HydroTrac MicroDAU Other Units Generator Control System Unit 1 Unit 2 HydroTrac Controller IrisBus/RS-485 Plant Ethernet MicroDAU Controller Diagnositic Expert System Ethernet Figure 1 - HydroX Components Page 4 specific monitor (PD, vibration, air gap, etc) will be stored in a device specific database maintained by the monitor. Conventional Sensor Interface All process-type data is obtained from an interface to the plant’s GCS (generation control system) or SCADA (supervisor control and data acquisition) system. The GCS provides a software interface, which allows HydroX to periodically obtain a snapshot of the process parameters. In addition, HydroX can pass alarm conditions back to the GCS to alert the operator to a generator condition diagnosed by the expert system. Partial Discharge (PD) Sensors A PD data sensor interface module is used to obtain PD information from the HydroTrac partial discharge system. One PD test on 6 coupler pairs can include a significant amount of data thus the PD acquisition hardware is constructed to provide only the key PD indicator values such as NQN and QM numbers (Figure 2). This data is sufficient for the expert systems diagnostic; . . .
. . .  measurement to improve generator availability”, EPRI Generator Conference, New Orleans, January 2001. 3. Hirschman, G., Bardsley, S., Walter, T., Zelinski, A., Zelingher, S. Stanovsky, G. and Krikorian, M. “Micro-DAU: High Performance Data Acquisition For Hydroelectric Generator Machine Diagnostics” HydroVision 2000 , August 8-11, 2000 , Charlotte, NC. 4. Siola, R., Zelingher, S., Hirschman, G. B. and Tecza, J. A. "Development and Implementation of a Monitoring and Diagnostic System for a Hydroelectric Pumped Storage Facility," presented at the EPRI Sixth Predictive Maintenance Conference, May 1994, Philadelphia, PA. 5. Zelinski, A., Stranovsky, G., Tecza, J., Walter, T. “Improving Hydromachinery Health Through Condition Monitoring.” Hydrovision ’98, July 28-31, 1998, Reno, NV. 6. Walter, T., Hirschman, G., Krikorian, M., Westmacott, A. “Experience With Condition Monitoring Of A Hydroelectric Generator And The Impact Of Market- Driven Operation On Unit Behavior”, 56th Meeting of the Society For Machinery Failure Prevention Technology, Virginia Beach, VA, April 15 – 19, 2002 Authors Blake Lloyd is Vice President of Product Engineering with Iris Power Engineering Inc. He was the architect of the HydroX development work. Tim Rangongo is General Manager of Product Development with Iris Power Engineering Inc and is currently to project manager for the software development of HydroX Page 10 Gordon B. Hirschman is Senior Program Director with Foster-Miller Technologies (FMT), Inc. He . . .
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