Power Flow Calculation for DC Distribution Network Considering DC-DC Converter Control Mode

With the increase of the penetration rate of distributed generation, DC distribution network has gradually attracted attention due to higher power quality, lower losses, and larger distributed energy resource acceptance capability compared with AC distribution network. This paper proposes a new power flow calculation method for DC distribution network considering DC-DC converter control mode. Firstly, the steady-state models of voltage source converter (VSC) and DC-DC converter are established, and their control modes are analyzed in detail. Then power flow equations in DC distribution network considering different DC-DC converter control modes are derived, and the method for solving DC power flow problem is proposed. Finally, the modified IEEE 14-bus system is taken, and the program is implemented in MATLAB. Compared with the PSCAD simulation results, the effectiveness of the proposal is verified.