Power transformers are an essential part of bulk power transmission, allowing high
capacity lines and cables to delivery energy at voltages used by commercial and
residential customers. PDC provides power engineering expertise, focusing on power
transformers. Our engineer's strong focus in this area provides a depth required
for the unique situations presented in the design, application, operation and
maintenance of power transformers. PDC specializes in the areas of power transformer
design and operating principles, including:
Transformer Thermal Modeling and Rating
Transformer Design and Design Analysis
On-site Inspections & Quality Control Audits of New & Rebuilt Transformers
Witness of Transformer Dielectric and Performance Characteristic Testing
PDC has been involved in several Electric Power Research Institute (EPRI) projects.
He developed and verified algorithms for the transformer-rating module in EPRI's
Dynamic Thermal Circuit Rating (DTCR) software and contributed to that software's
development in other areas. He was one of the principal investigators working on
revisions to EPRI's Power Transformer Loading (PTLOAD) program for performing design
and planning studies on transformers, where he developed the bottom oil, bubble
evolution and transformer aging models based on the IEEE C57.91-1995 standard. He
also has been the principal investigator working on the EPRI XVisor Transformer
Diagnostic expert system, including the development of a diagnostic model for assessing
the condition of on-load tap changers (OLTCs), included the use of dissolved gas
analysis (DGA) as a diagnostic tool in OLTCs.
Examples of projects include review and development of next generation thermal models
for operating power transformers, review of supplemental cooling options for power
transformers, thermal model of substation terminal equipment and development of online
diagnostic and thermal performance software for power transformers.
PDC personnel have also been involved in field failure investigations of phase shifting
transformers, GSUs, EHV power transformers, medium and small power transformers, and
small distribution transformers. In addition to failure investigations, PDC engineers
have performed plant QC audits, specification reviews and factory test witness reviews
for various industrial and utility clients.