电网技术Issue(1)：3649-3654,6.DOI:10.13335/j.1000-3673.pst.2014.01.008
智能变电站分布式同步采样组网技术
A Networking Transferring Scheme of Distributed Synchronized Sampled Data for Smart Substation
李澄 1袁宇波 2陆玉军 1宁艳1
作者信息
- 1. 江苏方天电力技术有限公司，江苏省 南京市 211102
- 2. 江苏省电力科学研究院，江苏省 南京市 211103
- 折叠
摘要
Abstract
The transfer method of sampled data in process-level network of smart substation is one of key technical problems in smart substation. At present, there are two sampled data transferring methods, namely the point-to-point transferring and networking transferring. The system structure can be simplified when networking transferring is used, however its operation depends on global synchronization system, so the failure in global synchronization system leads to the whole system out of service, so the networking transferring of sampled data should not depend on global clock. A new local synchronization scheme, in which the margin unit is used as local master clock and the protection, measuring and control devices as slave clocks, is proposed, and there are many slave clocks in a single measuring and control device, which are locally synchronized with local master clock in margin unit. By means of optimizing the clock selection and tracking mechanisms of IEEE1588, and utilizing interpolation the synchronous data sampling is implemented, and the dependence on global synchronization system is effectively avoided. Main advantage of the proposed scheme is that the networking transferring of sampled data is implemented without global synchronization system. Results of applying the proposed scheme to engineering practice show that the proposed scheme is more reliable and practicable than traditional networking scheme.关键词
分布式/局部同步/采样/数字保护/IEEE1588Key words
distributed/local synchronization/sampling/digital relay protection/IEEE1588分类
信息技术与安全科学引用本文复制引用
李澄,袁宇波,陆玉军,宁艳..智能变电站分布式同步采样组网技术[J].电网技术,2014,(1):3649-3654,6.
