Next‐generation distribution systems will be characterized by higher unbalanced currents due to increased asymmetrical currents produced by fast charging of electric vehicles and high short‐circuit currents under meshed operation. The unbalanced currents flowing through earthing impedances produce neutral‐earth voltages (NEVs) that may compromise the security (IEEE 62.92) and the safety (IEEE 80) of the system. Existing PMU‐based distribution system state estimation (PMU‐DSSE) methods described in literature are unable to estimate neutral‐earth voltages. To fulfill the research gap, this paper presents a new PMU‐DSSE formulation capable to estimate NEVs taking advantage of the OpenDSS's multiphase network model. The proposed procedure was successfully applied in two well‐known NEV test cases modeled in the OpenDSS platform.

中文翻译：

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中性点接地电压（NEV）系统状态估计模型

下一代配电系统的特点是，由于电动汽车的快速充电产生的不对称电流增加，并且在网状运行下产生的短路电流较高，因此电流不平衡性更高。流过接地阻抗的不平衡电流会产生中性点接地电压（NEV），这可能会损害系统的安全性（IEEE 62.92）和安全性（IEEE 80）。文献中描述的现有基于PMU的配电系统状态估计（PMU-DSSE）方法无法估计中性点接地电压。为了弥补研究空白​​，本文提出了一种新的PMU-DSSE公式，该公式能够利用OpenDSS的多相网络模型来估计NEV。所建议的过程已成功应用于OpenDSS平台中建模的两个著名的NEV测试案例中。