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Title: Improvement of Transmission Line Ampacity Utilization by Weather-Based Dynamic Line Rating

Journal Article · · IEEE Transactions on Power Delivery
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  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. AltaLink, Calgary, AB (Canada)
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Most of the existing overhead transmission lines (TLs) are assigned a static rating by considering the conservative environmental conditions (e.g., high ambient temperature and low wind speed). Such a conservative approach often results in underutilization of line ampacity because the worst conditions prevail only for a short period of time during the year. Dynamic line rating (DLR) utilizes local meteorological conditions and grid loadings to adaptively compute additional line ampacity headroom that may be available due to favorable local environmental conditions. This paper details Idaho National Laboratory-developed weather-based DLR, which utilizes a state-of-the-art general line ampacity state solver for real-time computation of thermal ratings of TLs. Performance of the proposed DLR solution is demonstrated in existing TL segments at AltaLink, Canada, and the potential benefits of the proposed DLR for enhanced transmission ampacity utilization are quantified. Moreover, we investigated a hypothetical case for emulating the impact of an additional wind plant near the test grid. Furthermore, the results for the given system and data configurations demonstrated that real-time ratings were above the seasonal static ratings for at least 76.6% of the time, with a mean increase of 22% over the static rating, thereby demonstrating huge potential for improvement on ampacity utilization.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1474098
Report Number(s):
INL/JOU-17-42173-Rev000
Journal Information:
IEEE Transactions on Power Delivery, Vol. 33, Issue 4; ISSN 0885-8977
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 53 works
Citation information provided by
Web of Science

Cited By (3)

Effect of thermal boundary condition on forced convection from circular cylinders journal July 2019
Performance and Accuracy Investigation of the Two-Step Algorithm for Power System State and Line Temperature Estimation journal April 2018
Time-Aware Monitoring of Overhead Transmission Line Sag and Temperature with LoRa Communication journal February 2019

Figures / Tables (22)

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17 WIND ENERGY
Dynamic line rating
general line ampacity state solver
grid integration
power system planning