基于直角坐标注入电流形式的多平衡节点潮流算法研究

对常规潮流计算中节点注入量由牛顿法的复功率改变为电流,修正方程中的不平衡量由计算有功和无功功率的偏差改变为计算节点注入电流偏差,对于PQ节点,雅克比矩阵只需修正对角块元素,简化了雅克比矩阵的变量元素。同时,针对常规潮流算法中功率不平衡量有一个平衡机承担问题,提出了一种处理多平衡节点的潮流算法,使功率不平衡量由多个发电单元分摊。该算法物理意义清晰,容易实现,收敛性好,给出的算例验证了提出算法的可行性。

An algorithm of multi-balance bus based on rectangular coordinate current influx

This paper describes an algorithm of multi-balance bus power flow based on rectangular coordinate current influx. The algorithm make the imbalance power share with several generation units. The mismatch is current influx instead of active power and reactive power imbalance. For PQ bus, the off-diagonal Jacobian matrix elements are equal to those of the nodal admittance matrix, which is simple compared with conventional Newton Raphson formulation. The algorithm has an obvious physical meaning and a good convergence characteristic. The example shows the feasibility of the proposed algorithm.