基于有向图的配网供电能力实用计算方法  

A practical solution for supply capability of a distribution network based on an oriented graph

作　　者：张雅迪 方朝雄 张林垚 郭瑞鹏[1] ZHANG Yadi;FANG Chaoxiong;ZHANG Linyao;GUO Ruipeng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;State Grid Fujian Provincial Economic Research Institute,Fuzhou 350003,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]国网福建省电力有限公司经济技术研究院,福建福州350003

出　　处：《电力系统保护与控制》2020年第8期10-16,共7页Power System Protection and Control

基　　金：国家重点研发计划项目资助(2017YFB0902800)。

摘　　要：计及N-1准则的配网供电能力在计算时需考虑站内供电能力和站间负荷转移能力。基于配电网"闭环设计、开环运行"的特点,采用有向图模型描述站间联络关系并进行分析计算。首先,引入理想一供一备结构的概念及其有向图形式,提出联络馈线可根据转供方式拆分为理想一供一备结构的集合。然后,依据实际配网运行要求给出不同接线模式下联络馈线的分解方法,从而实现负荷转移时馈线容量约束的解耦,将复杂配电网化简为清晰直观的有向拓扑结构图。最后,基于有向图描述的配电网建立了供电能力计算模型,通过算例证明了方法的实用性和有效性。The calculation of supply capability for a power distribution network which takes the N-1 criterion into account needs to consider both the power supply capability of the substations and the transfer capability between substations. Given the characteristics of "closed-loop design and open-loop operation" of the distribution network, a directed graph is used to describe the connection relationship between substations and calculate total supply capability. First, the concept of ideal ’one supply, one backup’ structure and its directed graph form are introduced. It is pointed out that the connected feeders can be split into one supply one backup structures according to the transfer mode. Then, based on the actual distribution network operation requirements, the connected feeders are decomposed according to different connection modes, thereby decoupling the feeder capability constraints during load transfer. This simplifies the complex distribution network into a clear and intuitive directed topology diagram. Finally, the calculation model of total supply capability is established based on the distribution network described by the directed graph. The practicality and effectiveness of the method are illustrated by an example.

关 键 词：供电能力 配电网 负荷转移能力 接线模式 有向图 

分 类 号：TM73[电气工程—电力系统及自动化] O157.5[理学—数学]