Two-Stage Volt-VAr Optimization of Distribution Grids With Smart Inverters and Legacy Devices
Two-Stage Volt-VAr Optimization of Distribution Grids With Smart Inverters and Legacy Devices
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DOI：
10.1109/tia.2022.3183182
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发表时间：
2022-09-01
影响因子：
4.4
通讯作者：
Paudyal, Sumit
中科院分区：
文献类型：
--
作者：
Savasci, Alper;Inaolaji, Adedoyin;Paudyal, Sumit
本文提出了一种两阶段的电压无功控制策略，协调传统电网设备的离散控制和智能逆变器（SI）在配电网中的操作与光伏发电的高渗透率。第一阶段的调度问题优化协调有载分接开关的分接设置，开/关的并联电容器组的状态，和SI的有功功率输出。第二级结合SI伏-VAr模式，即，根据IEEE-1547的Q（V），以及自适应电压-VAr下垂函数Q（Delta V），以调度SI无功功率生成。这两个调度问题制定为混合整数线性规划问题，以保持易于处理的配方，并减少复杂性和计算负担，通常会出现在解决大规模的最优潮流问题。建议的两阶段策略进行了测试，修改后的IEEE 123节点系统考虑不同的下垂设置。在稳定PCC电压的同时保持较小的有功功率削减，增加Q（Δ V）下垂的调度策略优于仅Q（V）下垂的模型。
This article develops a two-stage volt-VAr control strategy coordinating the discrete controls of legacy grid devices and the operation of smart inverters (SIs) in power distribution grids with high penetration of photovoltaic generation. The first stage dispatch problem optimally coordinates the tap settings of on-load tap changers, ON/OFF status of shunt capacitor banks, and SIs' active power output. The second stage incorporates the SI volt-VAr mode, i.e., Q(V) as per IEEE-1547, and an adaptive volt-VAr droop function, Q(Delta V), to dispatch the SI reactive power generation. Both dispatch problems are formulated as mixed-integer linear programming problems to maintain tractable formulations and reduce the complexity and computational burden that usually arise when solving large-scale optimal power flow problems. The proposed two-stage strategy is tested on a modified IEEE 123-bus system considering different droop settings. The dispatch strategy augmented with Q(Delta V) droop outperforms the model with only Q(V) droop in stabilizing the PCC voltage while maintaining less active power curtailment.