动态安全评估中在线和离线结合的探究

Study on Combination of Online-function and Offline-function for Power System Dynamic Security Assessment System

在线动态安全评估系统利用实时运行数据和模型参数,进行电力系统潮流、电力系统稳定性、短路电流等进行跟踪分析,并进行高级的稳定裕度评估,给出电网实时的告警信息,反应电网的薄弱点。然而随着电网结构的发展,数据模型的变化,采用预分配的固定参数设置,显示当前告警结果已无法满足调度自动化的需求。本文将动态安全评估的在线与离线结合起来,不但能提供电网的历史数据和在线信息查看,而且实现了对各级电网的在线监视、评估和预警,保证了系统的灵活性和稳定性,提高了工作效率,为运行人员提供了便捷手段。

Oline dynamic security assessment system using real-time operating data and model parameters, track and analyze power flow,power system stability,short circuit current,etc.,and advanced assessment of total transfer capacity(TTC).Real-time alarm information of power grid is shown which reflect weak points of the grid.However,with the development of grid structure and data model,only displaying current alarm results that is unable to meet dispatchers’ demands through pre-allocation fixed parameters mechanism adopted. This paper introduced combination of dynamic security assessment system and offline system, not only view Online historical data and online information of grid,but also achieve online monitoring, assessment and early warning for power grid at all levels,which ensure the system's flexibility and stability,improve work efficiency,and provide convenient means for operator.