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Energies 2018, 11(6), 1523; https://doi.org/10.3390/en11061523

A Thermal Rating Calculation Approach for Wind Power Grid-Integrated Overhead Lines

1
Key Laboratory of Power System Intelligent Dispatch and Control, Shandong University, Jinan 250061, China
2
State Grid of Technology College, Jinan 250002, China
3
Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan 250003, China
4
ZaoZhuang Power Supply Company of State Grid Shandong Electric Power Company, ZaoZhuang 264000, China
*
Author to whom correspondence should be addressed.
Received: 7 April 2018 / Revised: 3 May 2018 / Accepted: 3 May 2018 / Published: 12 June 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

Currently, the rapid increase in wind power integration in power systems is resulting in an increasing power flow in the grid-integrated power transmission lines of wind farms. The wind power curtailment caused by the current limits (thermal ratings) of the wind power integration overhead lines (WPIOLs) is becoming increasingly common. Aiming at this issue, the influence of conductor heating on the loss of tensile strength (LOTS) and sag of a WPIOL was analyzed in this paper. Then a decision model is proposed for the thermal ratings of WPIOLs, which regards the minimized wind power curtailment as objective and introduces permissible cumulative LOTS and sag of the conductor as constraints. Based on this model, the thermal rating for a WPIOL can be decided to ensure the expected service life of the conductor and safe clearance. In addition, case studies are used to demonstrate that the proposed approach is capable of improving the conservatism of conventional thermal rating calculation and reducing the wind power curtailment by improving the utilization efficiency of WPIOLs. View Full-Text
Keywords: power system; wind power accommodation; overhead transmission line; thermal rating; loss of strength; sag power system; wind power accommodation; overhead transmission line; thermal rating; loss of strength; sag
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wang, M.; Wang, M.; Huang, J.; Jiang, Z.; Huang, J. A Thermal Rating Calculation Approach for Wind Power Grid-Integrated Overhead Lines. Energies 2018, 11, 1523.

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