An Overview of the Flexible Interconnection System in the Medium Voltage Distribution Network
Weiru Wang, Sheng Zhang, Yechun Xin, Yanxu Wang, Wei WangBackground:
Flexible interconnection technology is pivotal for medium-voltage distribution areas in new power system setups, enabling power exchange, load transfer, and dynamic capacity enhancement. This study reviews the research status of flexible interconnection systems in medium-voltage distribution areas, aiming to clarify current progress and identify future directions
Objective:
A comprehensive review approach was adopted. We analyzed existing literature, demonstration projects, and technical reports. Focus areas included topological forms of flexible interconnection devices, control technologies, configuration planning, optimal scheduling, and emerging technologies like multi-layer collaboration and virtual power plants. Data was collected from academic databases, industry publications, and project documentation, then systematically categorized and evaluated.
Method:
First, the current topologies of flexible interconnection networks were expounded, and medium-voltage flexible interconnection demonstration projects were summarized, demonstrating diverse structural applications. Second, in-depth insights into the control technologies, configuration planning, and optimal scheduling of flexible interconnection systems were obtained, highlighting their technical feasibility and application potential. Third, prospects for multi-layer collaborative and virtual power plant technologies in flexible interconnection systems were outlined, indicating promising integration paths.
Result:
The diversity of topological forms reflects the adaptability of flexible interconnection technology, but also brings challenges in standardization. Control and scheduling technologies are mature but need to be integrated with actual grid operation scenarios. Multi-layer collaboration and virtual power plants offer new directions, yet require addressing issues such as data interoperability and coordination mechanisms. Overall, the technology shows great promise but faces practical implementation hurdles.
Conclusion:
Flexible interconnection technology is key for medium-voltage distribution area operation. Current research covers topology, control, and planning, with demonstration projects verifying feasibility. Future development lies in promoting multi-technology collaboration, addressing implementation challenges, and exploring new application models to fully unleash its potential in new power systems.