Steady-State Control and Active Optimization Method for Distribution Networks with Flexible Interconnected Devices

With the large-scale integration of distributed energy resources, the operational characteristics of distribution networks have undergone significant changes, rendering traditional tie switches inadequate to meet complex and dynamic operational requirements. In contrast, flexible interconnected devices, leveraging their superior flexibility and rapid response capabilities, provide novel solutions for distribution network optimization. These devices enable real-time precise voltage regulation and effectively address challenges such as sudden power fluctuations from DER. This paper conducts an in-depth analysis of the operational characteristics, multi-port coupling mechanisms, and coordinated control strategies of FID. Under extreme operational scenarios, simulation models are developed to comparatively evaluate the power mutual support capabilities of FID. Building on this foundation, an operational optimization model for FID-integrated distribution networks is established and solved using a particle swarm optimization (PSO) algorithm. The proposed method offers a feasible approach to mitigate voltage fluctuations and enhance renewable energy accommodation in conventional distribution networks. Simulation results demonstrate that the method effectively reduces operational costs while significantly improving power quality and supply reliability.