Daryl R. Dunahoo, P.E.
AREAS OF SPECIALIZATION
Substation battery selection, bolted electrical connections, substation design, materials procurement, project management, control and relay system design, relay calibration and setting, protective device coordination, substation cut-in and inspection services.
Mr. Dunahoo worked for Georgia Power Company from 1984 until 1989 and Southern Engineering Company from 1989 until 1999. Mr. Dunahoo is a Project Manager, over substation engineering, design, and construction, including over 100 substation projects. He is experienced in substation relaying and protection, including relay calibration & troubleshooting, high-pot testing of station equipment, substation modifications and upgrades, and co-generation projects for industrial customers. He has been responsible for the scheduling and preparing of plans, drawings, and specifications for dozens of substation projects.
Mr. Dunahoo has experience in designing and checking relay panels and troubleshooting relay circuits. He has experience in the high voltage withstand and impulse testing of underground cables, cable termination systems, insulators, transformers, and hot-line work equipment.
Additional areas of specialization include: DC battery systems, bolted connections and conductor ampacity studies.
Elk Run 230 – 34.5-12.47kV Substation — Rappahannock Electric Cooperative, Fredericksburg, VA
This station was a re-build of a 115-12kV Substation serving a Colonial Pipeline pumping station and a few distribution circuits. The power supplier, Dominion Power, upgraded their line to 230kV necessitating a re-build of the substation. Mr. Dunahoo was responsible for planning, designing, and managing the project from inception to completion In 2012. Rappahannock is a long term client of Mr. Dunahoo’s where he has been responsible for the design of more than two dozen substations over a period of more than 20 years.
Blind Bridge 230-25kV and 230-12.5kV Substation — Four County EMC, Burgaw, NC
Four County EMC needed help selecting a site, and developing this large distribution substation. PCE assisted with site selection, meetings with CP&L the power supplier, and complete design, including the transmission tap Into the station. Mr. Dunahoo was responsible for all aspects of the project from inception to completion in 2009. Four County is a 20+ Year client of Mr. Dunahoo and he has been responsible for design and construction of at least ten substations for this client.
Titan 138 – 13.2kV Substation — Public Utilities Board, Brownsville, TX
Mr. Dunahoo designed the original station in 1999 and in 2015 was still Project Manager over the upgrade in Brownsville, Texas. The station was built for maximum reliability with dual 138 – 12.47kV LTC power transformers. The 138kV bus has four tap positions, two are for a future on-site generation plant. The others feed two transformers which are configured with automatic sectionalizing low-voltage breakers in metal-clad switchgear. PCE prepared complete drawings and specifications, obtaining bids, handled bid evaluation and preparation of contract documents, project management & final inspection.
PCE personnel calculated all the fault currents, designed the protective scheme, performed the relay coordination, developed the relay settings, set all the relays, performed functional testing of the protective system and placed the station in service. PCE maintained a good relationship with this client through the years and in 2015 was involved in a re-build of the same substation including installation of 138kV Breakers with SEL line protection packages, Upsizing transformers and replacing switchgear.
Bellevue 115-25kV Substation — Georgia Power Company, Atlanta, GA
Georgia Power Company hired PCE to produce all the control wiring, protective relay system, and control circuit drawings to modify this 33 year old station. Mr. Dunahoo was responsible for utilizing Georgia Power Company’s proprietary material ordering, scheduling, and tracking systems as well as utilizing GPC standard control practices.
Sawnee Electric Membership Corporation — Cumming, GA
Mr. Dunahoo has been responsible for designing and managing the construction of more than twenty 25kV Switching Stations over a period of 25 years. On each of the projects, he was responsible for all aspects of labor and material specification and procurement, project management, and contract close-out procedures. This very satisfied client continues to put its trust in Mr. Dunahoo for all of its substation needs.
B.S. Electrical Engineering, Georgia Institute of Technology
Minor in Industrial Psychology (Ergonomics and Industrial Factors Engineering)
Registered Professional Engineer, Multiple states
Mr. Sam Wilson, Director of Substation and Transmission Engineering Rappahannock Electric Cooperative, Inc. (540) 891-5846
Mr. Gary Mauldin, Chief Operations Officer, Sawnee EMC, Cumming, GA (678) 455-1312
Mr. James McCann, Director of Electrical Engineering, Operations, & Power Supply, Public Utilities Board, Brownsville, TX, (956) 983-6203