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直流最优潮流计算节点边际电价的方法已经很成熟,但由于其对电力系统进行简化计算,因此,优化结果与实际运行情况不符。采用交流最优潮流计算节点边际电价,目前工程实用化并不广泛。为此,提出交直流迭代求解含网损节点边际电价。该方法采用直流最优潮流模型进行有功经济功率分配,采用交流模型计算精确潮流和网损。两者交互迭代,直到收敛后采用转置雅可比矩阵法计算网损微增率,结合直流最优潮流得到的节点边际电价计算含网损的节点边际电价。通过IEEE14节点和IEEE118节点算例验证了所提出的方法的可行性,并分析了参考节点对该方法的影响。算例计算结果表明该方法经济意义和物理含义明确、计算简单,适合工程应用。
The method of calculating the marginal price of nodes by the DC optimal power flow is very mature. However, due to its simplified calculation of the power system, the optimization result is not in accordance with the actual operation. Adopting the AC optimal power flow to calculate the node marginal price, the current project is not widely used. For this reason, propose the intersection of AC and DC iteratively solve the marginal electricity price with network loss node. This method uses the DC optimal power flow model for active economic power distribution, and uses the AC model to calculate the accurate power flow and network loss. The two iteratively iteratively until the convergent convergence Jacobian matrix method is used to calculate the incremental increase of the network loss. The marginal electricity price of the nodes with loss of network is calculated by combining the marginal electricity price of the node with the DC optimal power flow. The feasibility of the proposed method is verified by examples of IEEE14 nodes and IEEE118 nodes, and the influence of reference nodes on this method is analyzed. The calculation results of the example show that the method has clear economic meaning and physical meaning, is simple in calculation and suitable for engineering application.