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

Abstract

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 ampacitymore » utilization.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2];  [2]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. AltaLink, Calgary, AB (Canada)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind Energy Technologies Office (EE-4WE)
OSTI Identifier:
1474098
Report Number(s):
INL/JOU-17-42173-Rev000
Journal ID: ISSN 0885-8977
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Power Delivery
Additional Journal Information:
Journal Volume: 33; Journal Issue: 4; Journal ID: ISSN 0885-8977
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; Dynamic line rating; general line ampacity state solver; grid integration; power system planning

Citation Formats

Bhattarai, Bishnu P., Gentle, Jake P., McJunkin, Timothy, Hill, Porter J., Myers, Kurt S., Abboud, Alexander W., Renwick, Rodger, and Hengst, David. Improvement of Transmission Line Ampacity Utilization by Weather-Based Dynamic Line Rating. United States: N. p., 2018. Web. doi:10.1109/TPWRD.2018.2798411.
Bhattarai, Bishnu P., Gentle, Jake P., McJunkin, Timothy, Hill, Porter J., Myers, Kurt S., Abboud, Alexander W., Renwick, Rodger, & Hengst, David. Improvement of Transmission Line Ampacity Utilization by Weather-Based Dynamic Line Rating. United States. doi:10.1109/TPWRD.2018.2798411.
Bhattarai, Bishnu P., Gentle, Jake P., McJunkin, Timothy, Hill, Porter J., Myers, Kurt S., Abboud, Alexander W., Renwick, Rodger, and Hengst, David. Thu . "Improvement of Transmission Line Ampacity Utilization by Weather-Based Dynamic Line Rating". United States. doi:10.1109/TPWRD.2018.2798411. https://www.osti.gov/servlets/purl/1474098.
@article{osti_1474098,
title = {Improvement of Transmission Line Ampacity Utilization by Weather-Based Dynamic Line Rating},
author = {Bhattarai, Bishnu P. and Gentle, Jake P. and McJunkin, Timothy and Hill, Porter J. and Myers, Kurt S. and Abboud, Alexander W. and Renwick, Rodger and Hengst, David},
abstractNote = {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.},
doi = {10.1109/TPWRD.2018.2798411},
journal = {IEEE Transactions on Power Delivery},
number = 4,
volume = 33,
place = {United States},
year = {2018},
month = {1}
}

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