Tracking State Estimation in Distribution Networks Using Distribution-level Synchrophasor Data
Tracking State Estimation in Distribution Networks Using Distribution-level Synchrophasor Data
复制标题
使用配电级同步相量数据跟踪配电网络中的状态估计
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Hamed Mohsenian
中科院分区：
文献类型：
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作者：
M. Farajollahi;A. Shahsavari;Hamed Mohsenian
由于配电系统节点众多，测量源数量有限，状态估计往往是一项具有挑战性的任务。因此，配电系统状态估计通常不是实时的;而是每5到15分钟进行一次，例如，当智能电表测量可用时。因此，本文提出了一种用于跟踪配电系统中的状态估计的新方法，以在事件之后更新系统状态，例如，在典型的配电系统状态估计周期的5到15分钟间隔之间发生的突然的负载变化，而不需要对整个状态估计进行重新估计。该方法对于实时监测和控制应用具有重要意义。所提出的方法使用来自少至仅两个分布级相量测量单元的测量，微型PMU，安装在变电站和主馈电线或馈线终端。该方法基于电路理论中的补偿定理，根据馈线故障前后的数据生成等值电路，以更新状态估计结果。通过对IEEE 33节点测试系统的仿真，验证了该方法的有效性。
State estimation is often a challenging task in distribution systems due to numerous nodes and limited number of measurement sources. As a result, distribution system state estimation is often not real-time; instead, it is done once every 5 to 15 minutes, e.g., when smart meter measurements are available. Accordingly, this paper proposes a novel method for tracking state estimation in distribution systems to update the system states following an event, e.g., a sudden load change, that occurs in between the 5 to 15 minutes intervals of a typical distribution system state estimation cycle, without the need to rerun the whole state estimation. This method is of great interest for real-time monitoring and control applications. The proposed method uses measurements from as few as only two distribution-level phasor measurement units, a.k.a., micro-PMUs, that are installed at the substation and at the end of the main feeder or laterals. The method is developed based on the compensation theorem in circuit theory to generate an equivalent circuit according to the pre-event and post-event feeder data in order to update the state estimation results. The effectiveness of the proposed method is demonstrated through simulating the IEEE 33-bus test system.