With the increased number of installations of distributed photovoltaic (PV) systems within electricity distribution systems, power flow analysis is required to handle multiple PV systems. At present, PV systems are equipped with a local control function (LCF). The conventional algorithm is then applied for power flow analysis with the LCF of each PV system, where the power output of LCF of each PV system is calculated and used in the power flow calculation. The conventional algorithm is terminated when the voltage at each iteration of the power flow algorithm is converged. However, the conventional algorithm inevitably requires a lengthy calculation. This paper proposes a power flow algorithm that applies the Newton–Raphson technique to handle multiple PV systems with an LCF for a faster calculation. The LCF is approximated to have a continuous characteristic. The developed power flow algorithm can be used for a three‐phase unbalanced distribution system and its effectiveness was demonstrated in a modified 19‐node distribution system. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

中文翻译：

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使用连接的光伏系统的本地控制开发三相不平衡潮流

随着配电系统中分布式光伏（PV）系统安装数量的增加，需要进行潮流分析才能处理多个PV系统。目前，光伏系统配备了本地控制功能（LCF）。然后将常规算法应用于每个PV系统的LCF的潮流分析，在其中计算每个PV系统的LCF的功率输出并将其用于潮流计算中。当潮流算法的每次迭代中的电压收敛时，终止常规算法。然而，传统算法不可避免地需要冗长的计算。本文提出了一种潮流算法，该算法应用Newton-Raphson技术来处理具有LCF的多个光伏系统，从而加快了计算速度。LCF被近似为具有连续特性。改进的潮流算法可用于三相不平衡配电系统，其有效性在改进的19节点配电系统中得到了证明。©2020日本电气工程师学会。由John Wiley＆Sons，Inc.发布