基于增强型扰动状态估计的配电网测量装置贪婪配置
Greedy Placement of Measurement Devices on Distribution Grids based on Enhanced Distflow State Estimation
摘要：
近年来，对提高中低压配电网可观测性的需求显著增加。在本文中，我们专注于实用的方法来放置负担得起的测量设备（MD），这是提供三相电压，电流和功率测量具有一定的精度水平。布局过程由状态估计算法和贪婪布局方案组成。所提出的状态估计算法是基于Distflow模型，增强以考虑分流元件（例如，电缆电容），这在具有地下电缆的低压网络中不可忽略。贪婪的布局方案制定，使它找到的位置，同时满足一定的网格可观测性限制的最小所需数量的MD。这些限制被定义为状态估计结果的准确性方面的电压幅值和线电流在所有节点和线路，分别。建议的布局程序的有效性已被验证的10个中压节点和75个低压节点，其拓扑结构和参数可从瑞士日内瓦市的配电系统运营商（DSO）的一个现实的测试网格。
英文摘要：
The needs for improving observability of medium and low voltage distribution networks has been significantly increased, in recent year. In this paper, we focus on practical approaches for placement of affordable Measurement Devices (MDs), which are providing three phases voltage, current, and power measurements with certain level of precision. The placement procedure is composed of a state-estimation algorithm and of a greedy placement scheme. The proposed state-estimation algorithm is based on the Distflow model, enhanced to consider the shunt elements (e.g., cable capacitances) of the network, which are not negligible in low voltage networks with underground cables. The greedy placement scheme is formulated such that it finds the location of minimum required number of MDs while certain grid observability limits are satisfied. These limits are defined as the accuracy of state-estimation results in terms of voltage magnitudes and line currents over all nodes and lines, respectively. The effectiveness of the proposed placement procedure has been validated on a realistic test grid of 10 medium voltage nodes and 75 low voltage nodes, whose topology and parameters were made available from the Distribution System Operator (DSO) of the city of Geneva, Switzerland.
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