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Impact of Conductor Temperature Time–Space Variation on the Power System Operational State

1
School of Mechanical, Electrical and Information Engineering, Shandong University (Weihai), Weihai 264209, China
2
School of Electrical Engineering, Shandong University, Jinan 250061, China
3
Department of Mechanical-Electrical Engineering, Weihai Vocational College, Weihai 264210, China
*
Author to whom correspondence should be addressed.
Energies 2018, 11(4), 760; https://doi.org/10.3390/en11040760
Received: 12 February 2018 / Revised: 16 March 2018 / Accepted: 21 March 2018 / Published: 27 March 2018
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Abstract

The conductor temperature of an overhead transmission line varies with time and space, which has an important impact on the system operation. In this paper, the conductor temperature is solved iteratively by the CIGRE heat balance equation. The time–space variation of conductor temperature of a 220-kV transmission line is analyzed using real meteorological data from Weihai. Considering the temporal distribution characteristics, the seasonal model of the conductor temperature is given. Considering the spatial distribution, the mean value model, the weight average model, and the segmentation model are established. The system power flow involving the conductor temperature is established based on the relationship between conductor temperature and transmission line parameters. Through the calculation of power flow and the analysis of the maximum power transmission capability, the accuracy of the segmentation model is verified. The results show that the conductor temperature of overhead lines has obvious time–space variation characteristics. It is necessary to consider the time–space variation when analyzing the operation state of power systems. View Full-Text
Keywords: transmission line; power flow; maximum transmission power; conductor temperature; time–space variation transmission line; power flow; maximum transmission power; conductor temperature; time–space variation
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Wang, Y.; Mo, Y.; Wang, M.; Zhou, X.; Liang, L.; Zhang, P. Impact of Conductor Temperature Time–Space Variation on the Power System Operational State. Energies 2018, 11, 760.

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