考虑平衡节点无功约束的潮流算法

从交流功率网络性质和电力系统网络参数结构2方面分析了常规潮流算法中需要选择基准节点和平衡节点的原因。根据连续潮流计算中发电机无功约束出现的节点类型转换现象，提出了通过转换平衡节点类型来解决平衡机无功约束的潮流算法。通过对负荷节点功率变动态导纳处理，解决了电力系统天网性质造成的节点导纳矩阵病态问题，弥补了常规潮流算法的不足，反映了节点电压是由所有节点注入功率共同维持的客观事实。IEEE多个算例验证了所提算法的正确性和合理性。

A Power Flow Algorithm Considering Reactive Power Constraints of Slack Bus

The reason of both benchmark bus and slack bus to be selected in traditional power flow algorithm is analyzed in two aspects, i.e., the network features and network parameters of AC power network. According the node type conversion in reactive power constraints of generators during the continuous power flow calculation, a power flow algorithm is proposed to cope with reactive power constraints of balancing generators by means of converting the type of slack node. Through converting load power to dynamic admittance, the ill-conditioned nodal admittance matrix of power system due to the weakness connection between system bus and reference bus is solved, so the defect in traditional power flow algorithms is remedied and the objective fact that the nodal voltages are determined in common by the injected power from all nodes is reflected. The correctness and reasonableness of the proposed algorithm are validated by calculation results of IEEE test systems.