Ambient Weather Model Research and Development: Final Report.
Ratings for Bonneville Power Administration (BPA) transmission lines are based upon the IEEE Standard for Calculation of Bare Overhead Conductor Temperatures and Ampacity under Steady-State Conditions (1985). This steady-state model is very sensitive to the ambient weather conditions of temperature and wind speed. The model does not account for wind yaw, turbulence, or conductor roughness as proposed by Davis (1976) for a real time rating system. The objective of this research has been to determine (1) how conservative the present rating system is for typical ambient weather conditions, (2) develop a probability-based methodology, (3) compile available weather data into a compatible format, and (4) apply the rating methodology to a hypothetical line. The potential benefit from this research is to rate transmission lines statistically which will allow BPA to take advantage of any unknown thermal capacity. The present deterministic weather model is conservative overall and studies suggest a refined model will uncover additional unknown capacity. 14 refs., 40 figs., 7 tabs.
- Research Organization:
- Oregon State Univ., Corvallis, OR (USA). Energy Resources Research Lab.
- Sponsoring Organization:
- US Bonneville Power Administration
- DOE Contract Number:
- BI79-89BP01429
- OSTI ID:
- 6175502
- Report Number(s):
- BPA-90-39; ON: DE91006252
- Resource Relation:
- Related Information: NTIS: DE91006252
- Country of Publication:
- United States
- Language:
- English
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240303 - Power Transmission Lines & Cables- Overhead Lines- (1990-)