Partial DC Variable Elimination Method for Calculation of AC/DC Power Flow

A partial DC variable elimination method for calculation of AC/DC power flow was proposed to overcome the main disadvantages of the existing unified iterative methods.In its computational model,the converters are treated as PQ-loads that depend on the control angles and the voltages on the AC side.The DC reactive power is the only parameter to be specified in calculation,and the partial differential formulas in Jacobian matrix do not change when the DC control model changes.A numerical example shows that the proposed method has good feasibility,and its computational efficiency is raised by about 5% compared with the existing variable elimination method.