LMP计算中网损处理方法的研究

Study on Solving Power Loss in Computing LMP

针对节点边际价格(LMP)的求解,着重讨论了经典LMP计算模型及其改进模型对网络传输损耗的处理方法,提出了将支路有功网损折算到支路潮流的注入节点的方法,由该节点用户来承担网损费用,因而能够很好地符合网络潮流分布。同时采用交流潮流公式精确计算支路网损,然后将其代入网络传输约束方程,以显性的方式表达出来。最后以9节点系统为例,利用4种网损折算方法,求解不同负荷水平下各节点LMP及其分量,并对求解结果进行了比较。

For computing the locational marginal price（LMP）,the methods of solving power losses by the traditional optimization model and its improved methods are discussed.A new method by onverting the line power losses to the power injection bus of the relevant line is proposed to make the injection bus undertake the loss cost.The new method is in better accordance with the actual power distribution of the network.On the other hand,this model utilizes the AC power flow equations to obtain the line power loss,is introduced to the constraint equation explicitly.One nine-bus system is used to compute the LMP using four methods its components in different load levels,and the computing results are compared.