求解由节点功率引起线路潮流变化和功率损耗的方法  

METHOD TO DETERMINE BRANCH POWER AND BRANCH LOSS CAUSED BY NODE POWER

作　　者：吴政球[1] 毛弋[1] 荆勇[2] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]国家电力公司南方公司通信调度中心,广东广州510620

出　　处：《中国电机工程学报》2002年第9期34-37,共4页Proceedings of the CSEE

基　　金：教育部留学回国人员基金项目(1999363); 中华电力教育基金项目。

摘　　要：在分摊功率损耗和固定费用的MW-MILE方法及相关方法中,必须知道由合同交易引起的支路潮流变化量。现有的确定支路潮流方法是直流潮流法和边界潮流法,然而,它们在理论上是不完善的。该文根据交流潮流解算结果,将负荷节点和发电机节点功率分别按恒定阻抗接入网络,求解网络方程,节点电压能够被分别表达为网络所有负荷节点功率的函数和发电机节点功率的函数,进而可将支路潮流和损耗分别表达为负荷节点功率的函数和 发电机节点功率的函数,一旦获得这些表达式,就易精确地获得由节点功率引起的支路功率变化。文中给出了详细的分析实例。In MW-Mile and the related methods, the branch power change caused by node power must be known. Current methods to determine the branch power change are DC method and the boundary method, however, they are not correct theoretically. By using the traditional power flow solution results, the node generation powers and load powers are modeled by constant impedance and current source, respectively. The equalized generation impedance is connected to the related nodes, by using the Kirchoff 抯 laws and solving the network current equation, the node voltage is expressed as the function of node load power. Similarly, the node voltage is also expressed as the function of node generation power. Further, the branch power and loss can be allocated to node generation power or node load power by using the proposed theory of contribution of variables to nonlinear function value. Detailed results are presented.

关 键 词：电力系统 节点功率 线路潮流 功率损耗 

分 类 号：TM744[电气工程—电力系统及自动化]