摘要
提出了柔性配电网(FDN)的最大供电能力(TSC)模型与计算方法。首先,提出了FDN的概念,FDN利用电力电子开关构成的柔性开闭站(FSS)将多回馈线联络组网,采用能灵活控制潮流的柔性闭环运行方式。其次,提出了FDN的TSC模型与求解方法,模型计及了FSS对负荷的柔性转带策略。最后,搭建典型组网形态下不同情况的FDN验证所述方法。与传统配电网TSC对比发现:FDN的TSC总量既有提升的情况也有不变的情况,文中分析了原因。从TSC角度看,FDN的优势在于:1TSC在FDN实际运行中更易实现,达到TSC时FDN允许馈线上负荷任意分布,而传统配电网只有在负荷满足特定分布时才能达到TSC;2达到同等TSC时,FDN的组网结构更简单。所述方法已应用于国内外首个多端柔性闭环中压配电网示范工程的方案论证。
This paper proposes a total supply capability（TSC）model and the solution algorithm for flexible distribution network（FDN）.Firstly,FDN is defined as a distribution network,which operates in closed loop with flexible control of power flow when multiple feeders are linked together by a flexible switching station（FSS）composed of electronic switches.Secondly,the model and the solution algorithm of TSC for FDN are proposed,the model based on a new flexible load transfer strategy.Finally,the proposed model and solution algorithm are tested through a typical FDN in different scenarios.The test result is compared with the traditional TSC model,showing that TSC will either increase or remain unchanged when a traditional grid is upgraded to FDN,the reason for which is analyzed.The advantages of FDN seen from the aspect of TSC are as follows.On one hand,the TSC is easier to achieve in the FDN since the load can flexibly be distributed in the system.In contrast,only when the load is distributed in a certain specific way,can the traditional distribution network achieve TSC.On the other hand,the network configuration of FND is more concise than that of traditional distribution network with the same TSC.The proposed method has been applied in the argumentation of the first domestic demonstration project of multi-terminals flexible closed-loop medium-voltage distribution network.
出处
《电力系统自动化》
EI
CSCD
北大核心
2017年第5期30-38,共9页
Automation of Electric Power Systems
基金
国家高技术研究发展计划(863计划)资助项目(2015AA050102)
国家自然科学基金资助项目(51277129)~~
关键词
柔性配电网
最大供电能力
柔性开闭站
柔性闭环
示范工程
flexible distribution network（FDN）
total supply capability（TSC）
flexible switching station（FSS）
flexible closed-loop
demonstration project
