Abstract This paper presents a hierarchical coordinated volt-var controller (VVC) at medium voltage level for the containment of voltages at the critical nodes in a smart distribution network. VVC finds the optimal set-points for distributed generators and tap position of the transformers in order to contain the voltage at the critical nodes with-in limits and to minimize the total reactive power dispatched. In addition to the voltage regulation, VVC can track reactive power as a reference signal to control the power exchange across system boundaries. The proposed approach is compared with the optimal power flow that requires load flow calculation for each control update. In comparison, VVC is based on a sensitivity matrix based approach that reduces the complexity of the problem. The paper presents separate and combined evaluation of the proposed VVC with reactive power support from inverters at low voltage in order to quantify the combined impacts. The comparison is performed based on the voltage deviation and performance indices, line loading and reactive power exchange at the system boundary. The simulations spanning one year are performed on a synthetic network. The study leads to comprehensive insights into factors influencing the effectiveness of the reactive power control strategies.

中文翻译：

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基于灵敏度的协调伏无功控制和本地无功功率的评估，用于智能配电网络中跨系统边界的电压调节和电力交换

摘要 本文提出了一种用于控制智能配电网络关键节点电压的中压级分层协调无功电压控制器 (VVC)。VVC 找到分布式发电机的最佳设定点和变压器的抽头位置，以将关键节点的电压控制在限制范围内，并最大限度地减少调度的总无功功率。除了电压调节之外，VVC 还可以跟踪无功功率作为参考信号来控制跨系统边界的功率交换。将所提出的方法与要求每次控制更新的潮流计算的最佳潮流进行比较。相比之下，VVC 基于基于灵敏度矩阵的方法，可降低问题的复杂性。本文提出了对具有低压逆变器无功功率支持的拟议 VVC 的单独和综合评估，以量化综合影响。比较是基于系统边界处的电压偏差和性能指标、线路负载和无功功率交换进行的。跨越一年的模拟是在合成网络上进行的。该研究导致全面了解影响无功功率控制策略有效性的因素。