含DG配电网潮流算法及在网损分析中的应用研究  

Research on Improved Power Flow Calculation Algorithm for Distribution Network with DGs and Its Application to Network Losses Analysis

作　　者：王凌云[1,2] 郑业爽[1,2] 李升[3] 邹燕[1] 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]新能源微电网湖北省协同创新中心(三峡大学),湖北宜昌443002 [3]国网湖北省电力公司,武汉430077

出　　处：《三峡大学学报（自然科学版）》2015年第5期67-73,共7页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金项目(51407104);梯级水电站运行与控制湖北省重点实验室(三峡大学)开放基金(2013KJX09);三峡大学硕士学位论文培优基金(2014PY029)

摘　　要：分布式电源(DG)在并入配电网以后,由于各种分布式电源数学模型的不同,潮流计算中不能将其简单地处理为传统方法能够计算的PQ节点.本文分析了几种常见的DG模型,针对前推回代法不能处理PV等类型节点的问题,探究了潮流计算中各种节点的转化方法,考虑到PV、PI、PQ(V)型的节点无功功率不是恒定值,利用无功补偿对前推回代潮流算法进行改进.将改进型的前推回代算法在IEEE 33节点系统中进行大量测试,在DG并网以后,系统各节点电压值增大、网损减小,计算结果表明本文研究的DG模型和改进型的前推回代法是可行的,算法具有良好的收敛性能,计算方便快捷.When the distributed generation（DG）is connected to the distribution network,as their different kinds of mathematical models in power flow calculation,DG can not be simply treated as a PQ node which can be calculated by traditional methods.This paper analyzes several common DG models.For the problem that forward and backward substitution algorithm can not deal with PV and other types of nodes,transformation method for various nodes in power flow calculation is discussed.Considering that the reactive power of PV,PI and PQ（V）type is not constant value,reactive power compensation is used to improve forward and backward substitution algorithm.The improved algorithm is largely tested in IEEE 33 buses system.System nodes voltages are increased and network loss is decreased when the DGs are connected to distribution network.The results show that the model of DGs and improved algorithm that are studied in this paper are feasible;and the algorithm has good convergence;the computing is convenient and fast.

关 键 词：分布式电源 配电网 潮流计算 前推回代法 

分 类 号：TM743[电气工程—电力系统及自动化]