extreme natural disasters and potential geopolitical conflicts have seriously threatened the stable and reliable operation of distribution networks. Traditional dynamic recovery areas (DRA) overlook the recovery potential of vast grid following resources and fail to clarify the multi-action stages of multi-inverter coordinated operation. A heterogeneous DRA partitioned dynamic coordinated operation framework is proposed. Firstly
grid-forming
grid-following
and hybrid grid-forming and following DRAs are defined. Multi-key action stages for fault recovery
including partition establishment
mode switching
and grid synchronization
are introduced. Then
based on the operational requirements of each stage
a dynamic collaborative control method for distributed converters and soft open point is designed. In secondary control
voltage/frequency-free recovery and power sharing variables are introduced to achieve stable operation within the partition
while seamless interaction variables for smart switch (SSW) and grid-connection switches are introduced to ensure smooth cross-partition interaction. Finally
a simulation model is built in MATLAB/Simulink to verify the feasibility and effectiveness of the proposed framework and control design. The results show that the proposed method can establish DRA voltage and frequency
equally distribute internal resource power
flexibly respond to commands from SSW and grid-connection switch
fully exploit the coordinated recovery potential of heterogeneous resources
and enhance the operational resilience of the distribution network.