基于环间联络和配电自动化的配电网高可靠性设计方案  

A Design Scheme of High-Reliable Distribution Network Based on Tie Line Between Ring-Shaped Distribution Networks and Distribution Automation

作　　者：宋若晨[1] 徐文进[1] 杨光[1] 顾黎强[1] 

机构地区：[1]国网上海市电力公司,上海市浦东新区200122

出　　处：《电网技术》2014年第7期1966-1972,共7页Power System Technology

摘　　要：针对传统单环网结构无法满足城市重点地区供电可靠性要求,同时双环网结构在旧城区难以实现的问题,提出基于环间联络和配电自动化的配电网设计方案。环间联络表示在2回电缆环网之间增设1路备用联络线的网架优化方案。通过概率分布建模和计算,研究了环间联络线对负荷转移能力的影响。考虑联络线效用、重要负荷保障、投资建设成本3个因素,讨论了联络线落点位置的选择原则。为充分发挥环间联络结构的负荷转移能力优势,并降低故障处理时长,提出集中式和分布式协调配合的配电自动化设计方案,包括详细动作逻辑。最后,基于样本停电数据的可靠性分析结果验证了本设计方案的有效性,并比较了网架结构优化和配电自动化各自的应用效果和投资回报率。In allusion to the troubles that traditional distribution network with ring-shaped structure cannot meet the demand on power supply reliability for urban key regions and dual-ring-shaped structure is difficult to be implemented in old towns, a distribution network design scheme based on tie line between ring-shaped networks and distribution automation is proposed, where tie line between ring-shaped networks means that a backup tie line is added between two ring-shaped networks to optimize the network structure. Through modeling of probability distribution and calculation, the impacts of tie line between ring-shaped networks on load-transferring capability are researched. Considering three factors such as the utility of the tie line, ensuring power supply for important loads and investment on construction, the principles to position the tie line are discussed. To bring the tie line＇s superiority of load-transferring capability into full play and shorten the time for fault processing, a distribution automation scheme, in which the centralized and distributed fault processing are coordinated, is put forward along with detailed action logics. Finally, the results of reliability analysis based on sampled power supply interruption data validate the effectiveness of the proposed design scheme, and respective application effects as well as the return on investment（ROI） of network structure optimization and distribution automation are compared.

关 键 词：配网结构 备用联络线 配电自动化 可靠性分析 

分 类 号：TM715[电气工程—电力系统及自动化]