JI Yueyang,LI Peng,JI Haoran,et al.Analysis on Flexible Interconnection Operation Characteristics of Distribution Network Based on Modified Sen Transformer[J].Automation of Electric Power Systems,2026,50(1):20-28.
JI Yueyang,LI Peng,JI Haoran,et al.Analysis on Flexible Interconnection Operation Characteristics of Distribution Network Based on Modified Sen Transformer[J].Automation of Electric Power Systems,2026,50(1):20-28. DOI: 10.7500/AEPS20241210002.
Analysis on Flexible Interconnection Operation Characteristics of Distribution Network Based on Modified Sen Transformer
Flexible interconnection is an effective solution to enhance the operation flexibility of distribution networks
with flexible interconnection devices (FIDs) serving as the key component for enabling power sharing and flexible operation between feeders. However
the cost of fully-controlled power electronic-based FIDs is relatively high
making them suitable for deployment only at critical interconnection points within the distribution network. To achieve comprehensive flexibility across the entire distribution network and reduce the cost of flexible interconnection between feeders
this paper analyzes and describes the operation characteristics of distribution network flexible interconnection based on a modified Sen transformer (MST). First
the power regulation mechanism of the MST is elaborated
and the node voltage constraints for flexible interconnection between feeders via the MST are derived. Then
the regulation range of active power transfer and reactive power support provided by the MST is characterized
and the impact of node voltage variations at the connected terminals on the operation boundaries of the MST is analyzed. Finally
the regulation performance of the MST is validated by using parameters from an actual 10.5 kV distribution network in Tianjin of China. The results demonstrate that
under conditions satisfying flexible interconnection requirements between feeders
the MST enables a wider range of power transfer regulation with a smaller capacity of power electronic devices
thereby supporting flexible control of the distribution network.
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