基于SCADA/PMU混合量测的广域动态实时状态估计方法

Wide-Area Real-Time Dynamic State Estimation Method Based on Hybrid SCADA/PMU Measurements

根据来自监视控制与数据采集(supervisory control and data acquisition,SCADA)系统和相量测量单元(phasor measurement unit,PMU)的数据特点,提出了一种基于SCADA/PMU混合量测的广域动态实时状态估计方法,该方法充分利用了各节点间电压变化的相互联系,通过SCADA系统提供的初始值和安装PMU的节点的电压量测可简单地获得其他未安装PMU节点的电压相量。该方法有效地解决了在PMU配置不足的情况下如何观测电网状态以及如何在动态过程下实时观测电网。最后,通过对新英格兰10机39节点系统的多种故障进行仿真,验证了该方法的有效性和准确性。

According to the features of the data acquired from supervisory control and data acquisition （SCADA） and phasor measurement unit （PMU） respectively, a wide-area real-time dynamic state estimation method for whole power grid based on hybrid SCADA/PMU measurement is proposed. The proposed method fully utilizes the interrelationship among voltage variations of different buses, by means of the initial states from SCADA and the data measured by the buses where PMUs are installed, the voltage phasors of the buses where PMUs are not installed can be simply obtained. With the proposed method, dynamic processes in power grid can be effectively observed while the configuration of PMUs is insufficient. The effectiveness and accuracy of the proposed method are verified by simulation of various faults set up in New England 10-machine 39-bus system.