多种控制方式下交直流系统潮流算法改进

Advanced AC-DC Power Flow Algorithm Considering Various Controls

在对交替迭代法进行研究的基础上,发现直流输电系统系数矩阵在某种控制方式下可能奇异,对该系数矩阵在各种不同控制方式下的可逆性进行了分析和证明,指出直流输电系统方程系数矩阵可能出现不可逆的运行情况,并提出了在这些情况下交直流潮流算法的改进方法。文中提出的改进交替求解法经过实验测试,效果令人满意。

This paper finds that the coefficient matrix of DC system equations of sequential method might be singular under some control modes. Thus, an advanced sequential method for AC/DC power flow calculation considering various controls is proposed. The paper analyses and proves the singularity of the coefficient matrix of DC system equations under various control modes, and then indicates the condition when the singularity occurs. Moreover, a method is proposed in this paper to deal with this problem and an advanced algorithm is further developed. Numerical tests show that the proposed method is credible and accurate.