Abstract Aiming at the problem of optimal power flow in photovoltaic (PV) Inverters, this paper proposes a real-time algorithm for optimal power flow (OPF) in distributed PV inverters with sophisticated communication technologies and measurement. A higher accuracy and computation speed are obtained by proposing a linear, time-varying optimization method, and the objective function and constraints were linearized using the Taylor expansion under the premise of small variable changes during the short control period. By comparing with the constant linearization method, the proposed time-varying linear approximation method is more accurate and efficient. The problems faced by the centralized calculation is overcome by proposing a distributed control method which utilizes the alternating direction method of multipliers. The proposed distributed control method enables the distributed PV inverters to optimize their own power setpoints with only a little information required from neighbor nodes. Case study results demonstrate that the proposed algorithm makes the distributed PV Inverters more efficient and economical than the other methods.

中文翻译：

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光伏逆变器系统潮流优化的有效算法

摘要 针对光伏（PV）逆变器的最优潮流问题，本文提出了一种分布式光伏逆变器最优潮流（OPF）的实时算法，该算法具有复杂的通信技术和测量。提出了一种线性时变优化方法，获得了更高的精度和计算速度，在短控制周期内变量变化较小的前提下，利用泰勒展开式对目标函数和约束条件进行了线性化处理。通过与常数线性化方法相比，所提出的时变线性逼近方法更加准确和高效。提出了一种利用乘法器交替方向法的分布式控制方法，克服了集中计算所面临的问题。所提出的分布式控制方法使分布式光伏逆变器能够优化自己的功率设定点，只需从邻居节点获取少量信息。案例研究结果表明，所提出的算法使分布式光伏逆变器比其他方法更高效、更经济。