Calculation of available transfer capability for AC/DC power systems based on continuation power flow

The paper proposes and establishes an available transfer capability(ATC)model based on AC/DC power systems.The model uses two-end DC mixing system,considering the security constraints of voltage stabilit y,node voltage leve l,thermal stabilit y and N-1 contingency,etc.In the continuation power flow solving process,the AC system equation and the DC system equation are decomposed,and the coupling relationship of the AC/DC system is taken into account through the relation equations between the state variables of the DC system and the AC bus voltage of the converter station and the presented DC parameters.Simulation results of IEEE30-bus system prove that both the proposed model and method are effective.