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- Title
Frequency selection method for urban low frequency multi‐terminal interconnected systems.
- Authors
Xu, Kehan; Zhang, Zheren; Xu, Zheng
- Abstract
Large‐scale urban power grid (LUPG) is normally under the operating mode by voltage layer and zone partition. One of the most important directions for the development of urban is to enhance the controllability by flexible low‐frequency interconnection technology. In this study, a frequency selection method for urban low‐frequency multi‐terminal interconnected systems (ULFMIS) is proposed. Firstly, the required support power under different conditions, the index number of sending partition (SP) and receiving partition (RP) are determined. Secondly, by calculating the current distribution along the line under different support powers, the upper limit of the transmission frequency (ULTF) of each line is obtained. Finally, the smallest transmission frequency among the ULTFs of different tie lines is selected as the ULTF of the ULFMIS. The proposed method is validated in a typical four‐terminal ULFMIS. The results demonstrate that the suggested method is suitable for calculating the ULTF taking account of the influence of the number of parallel lines on economic cost and provide guidance for future practical ULFMIS projects.
- Subjects
FLEXIBLE AC transmission systems; ELECTRIC power distribution grids; CURRENT distribution; URBAN growth
- Publication
IET Generation, Transmission & Distribution (Wiley-Blackwell), 2023, Vol 17, Issue 9, p2182
- ISSN
1751-8687
- Publication type
Article
- DOI
10.1049/gtd2.12831