基于历史运行数据的电网运行状态演化特征提取

Feature Extraction of Grid Operation State Evolution Based on Historical Operating Data

了解电网运行状态的演化特征对系统安全运行具有积极的作用。针对模型仿真数据难以全周期描述电网运行状态的问题,提出基于SCADA系统高频的负荷实测数据连续长周期描述电网运行状态的新途径。首先,利用加权潮流熵表征电网运行负载水平和潮流分布状况的均衡性;其次,提出了基于圆分布法分析电网运行状态时序演化特性,进而提取其时序分布特征的方法;最后,实际电网算例结果表明,电网运行状态的演化时序具有在特定时段分布的特性,同时也验证了该方法的有效性。

It＇s helpful to understand the evolution of grid operating status for the safety of power system.Due to the problems describing the full cycle operation state hardly by using the model simulation data,power load measurement can be realized based on SCADA system.The paper presents a new approach to describe the operating status of the grid based on the long period of load data measured by the high frequency of SCADA system.Firstly,the power flow entropy weighted by load rate to represent the effect of load rate and power flow distribution changes is proposed.Then,the sequence characteristics of grid operation state is analyzed to draw the time distribution of feature based on circular distribution method. Finally,the extracted features have characteristics that are distributed over a particular period of time.And the proposed method is verified effectively.