Power Flow Calculation in the Voltage Output Stage

The distribution system represents the final stage in the transfer of power to the individual customers. In the distribution system analysis, the power flow calculation is the most basic and important calculation and is the foundation of the operation, plan, security, reliability analysis and optimization of the power system and is the foundation and springboard of the various electromagnetic transient analysis. A lot of uncertain factors exist in the distribution system. Uncertainty in the distribution system must be addressed in any analysis. In this situation, traditional certain power flow methods have limitation. The flow calculation in the fault condition is studied. The forward-backward sweep method is adopted to calculate fault power flow. The simulation research shows that the calculation results with the polynomial load model are proper in the practical application when the fault occurs.