Abstract Distributed generation sources (DGs) are widely considered as important sources of power generation in distribution systems during the last few decades. Despite the substantial benefits of DGs, increasing the penetration level of the DGs can cause dramatic voltage magnitude fluctuations. Coordination of the use of dynamic reactive power sources such as photovoltaic (PV) inverters and voltage control equipment can mitigate rapid voltage magnitude fluctuations. A coordinated volt-var control method is proposed herein to achieve the optimal expected performance (e.g., system losses) while considering the spatial correlation among PV source powers and constraining the variability of voltage magnitudes throughout the distribution network within permissible ranges. The proposed strategy formulates chance constraints on the voltage magnitude and considers the uncertainty of PV power injections over the interval of interest to maintain voltage magnitudes within acceptable limits. The proposed method has been tested on the IEEE 123-node radial distribution system for validation. Moreover, the simulation results demonstrate that the proposed method can effectively mitigate the fast voltage magnitude deviations with an acceptable reduction in system losses in the presence of intermittent renewable resources.

中文翻译：

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考虑发电相关性和电压质量约束的光伏逆变器和电压调节器的协调以实现损耗最小化

摘要 在过去的几十年里，分布式电源（DGs）被广泛认为是配电系统中重要的发电来源。尽管 DG 具有显着的优势，但增加 DG 的渗透水平会导致剧烈的电压幅度波动。光伏（PV）逆变器和电压控制设备等动态无功电源的协调使用可以缓解电压幅度的快速波动。本文提出了一种协调的伏无功控制方法，以实现最佳预期性能（例如，系统损耗），同时考虑 PV 源功率之间的空间相关性并将整个配电网络中电压幅度的可变性限制在允许范围内。所提出的策略制定了对电压幅值的机会约束，并考虑了感兴趣区间内 PV 功率注入的不确定性，以将电压幅值保持在可接受的范围内。所提出的方法已经在 IEEE 123 节点径向分布系统上进行了测试以进行验证。此外，仿真结果表明，在存在间歇性可再生资源的情况下，所提出的方法可以有效地缓解快速电压幅度偏差，同时系统损失的减少可以接受。