This letter proposes a novel coordinated current and voltage unbalance mitigation approach for networked microgrids (MGs). First, numerous dispersed PV systems in each MG are assembled as two aggregated systems with different connections. Then, a multi-MG cooperative current unbalance mitigation (CUM) method is developed for the substation transformer (ST) and the simplified linear programming (LP)-based CUM formulas are derived. Later, a neighborhood-collaborative mechanism-based voltage control and voltage unbalance alleviation method is proposed for individual PV inverters and is seamlessly integrated with the proposed CUM method. Case studies on four networked MGs validate the effectiveness and superiority of the proposed approach compared with a benchmark approach.

中文翻译：

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具有聚合光伏系统的联网微电网中的协调电流和电压不平衡缓解


这封信提出了一种用于网络微电网（MG）的新型协调电流和电压不平衡缓解方法。首先，每个MG中的众多分散的光伏系统被组装成两个具有不同连接的聚合系统。然后，针对变电站变压器（ST）开发了多MG协作电流不平衡缓解（CUM）方法，并推导了基于简化线性规划（LP）的CUM公式。随后，针对单个光伏逆变器提出了基于邻域协作机制的电压控制和电压不平衡缓解方法，并与所提出的 CUM 方法无缝集成。对四个网络 MG 的案例研究验证了所提出的方法与基准方法相比的有效性和优越性。