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

Mengxia Wang, Mingqiang Wang, Jinxin Huang, Zhe Jiang and Jinyan Huang
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Mengxia Wang: Key Laboratory of Power System Intelligent Dispatch and Control, Shandong University, Jinan 250061, China
Mingqiang Wang: Key Laboratory of Power System Intelligent Dispatch and Control, Shandong University, Jinan 250061, China
Jinxin Huang: State Grid of Technology College, Jinan 250002, China
Zhe Jiang: Electric Power Research Institute, State Grid Shandong Electric Power Company, Jinan 250003, China
Jinyan Huang: ZaoZhuang Power Supply Company of State Grid Shandong Electric Power Company, ZaoZhuang 264000, China

Energies, 2018, vol. 11, issue 6, 1-15

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.

Keywords: power system; wind power accommodation; overhead transmission line; thermal rating; loss of strength; sag (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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