电力SCADA系统大规模画面数据刷新方法应用研究

Research and Application of Massive Picture Data Refresh Method in Power Dispatch SCADA System

传统的画面数据刷新方法多通过请求/响应方式获取画面数据。在大量画面刷新情况下,该方法导致人机画面对后台SCADA服务器进行大量集中式数据访问,从而出现画面刷新效率低、服务器负载过高等问题。提出了一种适用于大规模画面数据刷新的方法(massive picture data refresh,MPDR),阐述了MPDR方法的工作原理及架构,并说明了该方法采用的画面消息模型、画面数据缓存、画面订阅管理等关键技术。MPDR方法已经成功应用在D5000系统,并部署于国家电力调度控制中心,目前运行情况良好。实践证明,MPDR方法能够较好满足大规模画面数据的刷新要求,从而保证电力SCADA系统的安全、稳定运行。

The traditional method of picture data refresh typically use request / response mode. In large amount of picture refresh case, this method has some problem including data inefficiency and heavy SCADA server load. Method of Massive Picture Data Refresh （MPDR） is proposed in order to overcome those problems. The working principle and architecture of the MPDR method are described first, Key technologies of proposed method, including picture message model, picture data cache and picture subscription management are explained. The MPDR method has been successfully applied in the D5000 system and deployed in the dispatching and communication center of State Grid. The field application proves the efficiency of MPDR method under large amount of picture data refresh requirement. It can be used to ensure safe and stable operation of power SCADA system.