A Method of Power Flow Calculation Considering New FACTS and HVDC

Focusing on the influence of new FACTS or HVDC, this paper proposes a method to calculate their power flow of modern power system. The proposed method is carried out by transforming new FACTS or HVDC into equivalent buses like PQ buses in AC. Compared with alternating iterative method and unified iterative method, the proposed method has advantages in convergence property, preparatory work and reusability. This paper used the proposed method, through theoretical deduction of the equations concerning DC system, to complete the power flow calculation of system with HVDC. Through case studies, the results proved that the proposed method has good convergence property and faster computing speed than unified iterative method.