Local-Area Communication Network Optimization for Secondary Control of Active Distribution System Based on MISDP Model

With the high participation of renewable distributed generation (DG) units, the power supply reliability of the active distribution system (ADS) under extreme events has been improved, but its operation control also faces new challenges. Since the secondary control layer of the ADS relies on the local-area communication network to realize the information interaction, the time delay is an inevitable inherent factor that affects the dynamic performance of the entire system seriously. This paper first proposes an optimal design method to simultaneously design the topology and link weights of sparse communication networks based on mixed integer positive semidefinite programming (MISDP). The balance between time delay robustness and convergence speed of secondary control in the ADS can be adjusted by setting weights of optimal indexes. Finally, the proposed optimization problem is solved by Yalmip with Mosek 9.3. The methods are verified by the simulation results based on MATLAB/Simulink.