Three-Phase Distributed Operation Optimization of Flexible Interconnected Distribution Areas with High Penetration of DGs

Low-voltage distribution areas are numerous and widely dispersed. With the increasing integration of distributed generators (DGs), the structure and scale of the areas have become more complex and extensive. Advances in power electronics have facilitated the development of flexible interconnection on the side of distribution areas. A three-phase distributed optimization method for flexible interconnected distribution areas considering high penetration of DGs is proposed. Flexible interconnection between areas is achieved through soft open point (SOP), enabling autonomous operation within each area and coordinated control and information exchange across areas. The accuracy and effectiveness of the three-phase distributed operation optimization method is validated on the revised practical flexible interconnected distribution areas with a multi-terminal ports SOP. Case results demonstrate that the proposed optimal method could enable mutual power support between distribution areas, and significantly mitigate voltage fluctuations and renewable energy consumption issues caused by high DG penetration.