交直流迭代法求解含网损节点边际电价

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。

AC-DC Iterative Methods for Calculating Locational Marginal Price with Losses

The direct current optimal power flow(DCOPF)is a maturity method for calculating locational marginal price(LMP).It performs the simplified computation of the electric power system,so the optimum results obtained do not accord with the real status of power system.But the method of adopting alternating current optimal power flow(ACOPF)to calculate LMP is not widely used for engineering application.So the AC-DC iterative method is proposed to calculate LMP with losses.In this method,DCOPF model is adopted to complete economic dispatching,and AC power flow model is adopted to calculate the precise power flow and power losses.Both processes iterate alternatively till the method is converged,then the transpose Jacobian matrix is adopted to calculate penalty factors.LMP with losses is deduced according with LMP without losses obtained by DCOPF and the penalty factors.The feasibility of the proposed method is proved by IEEE 14 bus and IEEE 118 bus system,with the effect of the slack bus on LMP analyzed.The calculation results indicate that the proposed method has appreciable economical significance and physical meanings,and is simple for engineering application.