【摘要】 数据采集与监视控制(SCADA)系统采集的各种实时、连续、有序的值序列是典型的数据流,而目前SCADA系统所采用的实时数据库系统对数据流处理的实时性和自适应性要求尚需改进。文中以配电自动化管理为应用背景,提出一个支持配电自动化的数据流管理系统,在配电网远方终端加入查询处理层,降低网络传输负载,提高配电网数据处理的实时性和可靠性。文中描述了系统的基本结构、各组成部分的功能和关键技术,探讨了有关分布式连续查询处理、近似计算、归档数据处理等问题,并提出在数据流研究方面的一些新看法。更多还原

【Abstract】 While the sequence of real-time, continuous and orderly values collected by supervisory control and data acquisition (SCADA) are a typical data stream, the real-time database management system (RTDBMS) currently adopted in SCADA should still be improved for data, stream processing with respect to the real-time character and adaptability. Based on the application of power distribution automation network management, a data stream management system (DSMS) supporting distribution automation network.is proposed. The query processing layer is added to the remote terminal unit in this DSMS to reduce the network load for transmission and improve the real-time performance and reliability. The basic architecture and key techniques of DSMS, and the functions of each constituent part are described. At the same time, the distributed continuous queries processing, approximate computation, and archived data processing are also investigated. Some personal views on further data stream research are given.更多还原