Topological Structure and Control Strategy of E-UPFC

Weiping Yang, Cong Liu and Limin Yin ()
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Weiping Yang: School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
Cong Liu: State Grid Jilin Electric Power Co., Ltd., Siping Power Supply Company, Siping 136000, China
Limin Yin: School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China

Energies, 2024, vol. 17, issue 6, 1-14

Abstract: This article proposes a unified power flow controller with energy (E-UPFC) installed at the renewable energy grid connection node of the transmission network. Compared with other unified power flow controllers (UPFCs), the proposed E-UPFC can not only regulate the power flow on its connected transmission lines, but also suppress the power fluctuations of grid-connected nodes injected with large-scale renewable energy. At the same time, with the installation position of E-UPFC transferred from the transmission line to the node, the original stiff node can be transformed into a flexible node that can regulate the injected power flexibly. First, the PV grid-connected system with E-UPFC is introduced, and its principle of power flow regulation is detailed. In addition, the topology, mathematical modeling, and control strategies of E-UPFC are discussed. Finally, the E-UPFC is applied to the IEEE 3-generator 9-bus system with large-scale renewable energy integration in Matlab/Simulink in order to verify the correctness and feasibility of E-UPFC and its control strategies.

Keywords: unified power flow controller; transmission network; power fluctuations; large-scale renewable energy; flexible node (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: 2024
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