改进的BP神经网络算法，基于拟牛顿算法。-Improved BP neural network algorithm, based on the quasi-Newton algorithm.

采用牛顿拉夫逊算法进行潮流计算，包括单支路，双支路，变压器的考虑，也进行了平衡节点，PQ,PV节点的考虑-Newton Raphson power flow calculation algorithm, including single slip, double slip, transformers considerations are also considered balanced nodes, PQ, PV nodes