High penetration of intermittent renewable energy resources (RES) will impose great challenges on the conventional voltage control in distribution networks. This paper proposes a two-stage cost-effective coordinated voltage control strategy to mitigate fast voltage violations while minimizing the total voltage regulation cost. In the first stage, the optimal power flow (OPF) is performed to determine the day-ahead dispatch results of on-load tap changers (OLTC) and capacitor banks (CBs). The hourly charging schedule of mobile energy storage systems (MESS) is also obtained through a spatial-temporal decision model embedded in the optimization problem. In the second stage, the real-time voltage control strategy is implemented to regulate the power output of photovoltaics (PVs) and MESS with one minute resolution. A novel fine-tuning control method is proposed to adjust the power output, which can further reduce voltage regulation cost within a certain voltage dead band. To reserve more fast-response power resources for PVs and MESS, the voltage regulation cost curves are designed as a piecewise linear function with different per unit cost in each range. The proposed approach is tested on the IEEE 33-bus and 123-bus distribution systems and comparative simulation results show the enhanced control effect in mitigating voltage violations and saving costs.

中文翻译：

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具有光伏和移动储能系统的有源配电网络中经济高效的协调电压控制

间歇性可再生能源（RES）的高渗透率将对配电网络中的常规电压控制提出巨大挑战。本文提出了一种两阶段具有成本效益的协调电压控制策略，以减轻快速电压违规，同时最大限度地降低总电压调节成本。在第一阶段，执行最优潮流 (OPF) 以确定有载分接开关 (OLTC) 和电容器组 (CB) 的日前调度结果。移动储能系统 (MESS) 的每小时充电计划也是通过嵌入优化问题的时空决策模型获得的。在第二阶段，实施实时电压控制策略，以一分钟的分辨率调节光伏 (PV) 和 MESS 的功率输出。提出了一种新的微调控制方法来调整功率输出，在一定的电压死区内进一步降低稳压成本。为了为 PV 和 MESS 预留更多的快速响应电源，电压调节成本曲线设计为分段线性函数，每个范围内的单位成本不同。所提出的方法在 IEEE 33 总线和 123 总线配电系统上进行了测试，比较仿真结果显示了在减轻电压违规和节省成本方面增强的控制效果。