Power flow calculation of chain-type AC-DC hybrid distribution network based on converter parameter identification

The equivalent parameters of converter for power flow calculation will be affected by the actual operating conditions. Meanwhile, the power flow calculation models of ACDC hybrid distribution networks are different. Aiming at above problems, this paper proposes a power flow calculation method of chain-type AC-DC hybrid distribution network based on converter parameter identification. First, the online parameters identification of AC-DC and DC-DC converter for power flow calculation is realized based on the least square method. Furthermore, the identified values are brought into the general power flow calculation model of AC-DC system, and then the Newton- Raphson algorithm is used to solve it. Thus, the power flow calculation of the chain AC-DC hybrid distribution network is realized. Finally, the simulation results show the effectiveness of the proposed method and the power flow calculation results after online identification are more accurate.