少环配电网节点边际容量成本研究

Research on the Locational Marginal Capacity Cost of Weakly Meshed Distribution Network

配电网负荷增加将导致供电设备扩容提前,从而提高扩容投资现值。针对少环配电网的网络结构,提出了能够反映支路潮流分流情况的分流系数矩阵的概念及其计算方法,并结合推导而得的节点注入功率-支路电流灵敏度,建立灵敏度系数矩阵,用于计算得到可以表示配电网各节点占用供电容量成本大小的节点边际容量成本(locational marginal capacity cost,LMCC)。进一步改进了基于雅克比矩阵的节点-支路潮流灵敏度系数矩阵的计算方法,用于计算LMCC,并作为对照方法在IEEE33配电系统中进行测试,对比验证了本文方法的有效性。

The increasing of the load in the distribution net- work will advance the expansion time of the power supply e- quipment, and improve the value of expansion investment. According to the structure of weakly meshed distribution network, the conception and calculation method of current distribution coefficient matrix, which can reflect the distri- bution of the power flow, are proposed. The sensitivity co- efficient matrix is built by combining the sensitivity of node power injection- branch current and current distribution co- efficient matrix. And the locational marginal capacity cost （LMCC）, which represents the capacity cost of each node, can be calculated. The sensitivity coefficient matrix depending on the Jacobi matrix is improved to calculate the LM- CC, and the IEEE33 distribution system is used as test example to verify the feasibility of the method proposed in this paper.