Ashland Area Support Substation Project : Environmental Assessment.

Technical Report · Mon Jun 01 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/10171832· OSTI ID:10171832

The Bonneville Power Administration (BPA) provides wholesale electric service to the City of Ashland (the City) by transferring power over Pacific Power & Light Company`s (PP&L) 115-kilovolt (kV) transmission lines and through PP&L`s Ashland and Oak Knoll Substations. The City distributes power over a 12.5-kV system which is heavily loaded during winter peak periods and which has reached the limit of its ability to serve peak loads in a reliable manner. Peak loads under normal winter conditions have exceeded the ratings of the transformers at both the Ashland and Oak Knoll Substations. In 1989, the City modified its distribution system at the request of PP&L to allow transfer of three megawatts (MW`s) of electric power from the overloaded Ashland Substation to the Oak Knoll Substation. In cooperation with PP&L, BPA installed a temporary 6-8 megavolt-amp (MVA) 115-12.5-kV transformer for this purpose. This additional transformer, however, is only a temporary remedy. BPA needs to provide additional, reliable long-term service to the Ashland area through additional transformation in order to keep similar power failures from occurring during upcoming winters in the Ashland area. The temporary installation of another 20-MVA mobile transformer at the Ashland Substation and additional load curtailment are currently being studied to provide for sustained electrical service by the peak winter period 1992. Two overall electrical plans-of-service are described and evaluated in this report. One of them is proposed for action. Within that proposed plan-of-service are location options for the substation. Note that descriptions of actions that may be taken by the City of Ashland are based on information provided by them.

• Research Organization: USDOE Bonneville Power Administration, Portland, OR (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• OSTI ID: 10171832
• Report Number(s): DOE/EA-0586; ON: DE92019442; NC: NONE
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
240500
54 ENVIRONMENTAL SCIENCES
540250
BONNEVILLE POWER ADMINISTRATION
ELECTRIC POWER
ENVIRONMENTAL ASPECTS
ENVIRONMENTAL IMPACTS
Electric substations - Environmental aspects - Oregon - Ashland
LOAD MANAGEMENT
PEAK LOAD
POWER DISTRIBUTION SYSTEMS
POWER TRANSMISSION LINES
SITE RESOURCE AND USE STUDIES