基于连续潮流法的交直流系统可利用传输能力的计算

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

提出并建立了交直流系统可利用传输能力(ATC)模型。该模型采用两端直流混合系统,考虑电压稳定性、节点电压水平、热稳定、N-1故障等安全约束条件。应用连续潮流法求解过程中,将交流和直流系统方程分解计算,通过直流网络状态量与换流器交流母线电压和给定直流控制量之间关系方程组来简捷地计及交直流系统间耦合关系。对IEEE30节点系统进行的仿真计算证明了所提出模型和算法的有效性。

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.