This paper proposes a control strategy for the optimization of the reactive power sharing based on an iterative adaptive virtual impedance (IAVI). The IAVI includes two elements: the first is proportional to the reactive power delivered by the distributed generation units at the current iteration, while the second is proportional to the sum of the reactive power variations at the previous iterations. The proposed control strategy has been verified under a Matlab/Simulink environment for an islanded meshed microgrid with three distributed generators. The simulation of different scenarios considering feeder impedance mismatches, different microgrid configurations, and variable loads has shown a good accuracy in the sharing of the reactive power in the microgrid.

The control strategy proposed in this paper can be easily implemented as it does not require any communication link between the generators, any knowledge regarding the feeder impedances, and any local load measurement.

本文提出了一种基于迭代自适应虚拟阻抗（IAVI）的无功功率共享优化控制策略。IAVI包括两个元素：第一个元素与当前迭代中的分布式发电单元传递的无功功率成比例，而第二个元素与先前迭代中的无功功率变化之和成比例。在Matlab / Simulink环境下，针对具有三个分布式发电机的岛状网格微电网，已经验证了所提出的控制策略。考虑馈线阻抗失配，不同微电网配置和可变负载的不同场景的仿真显示了微电网中无功功率共享的良好准确性。

本文提出的控制策略很容易实现，因为它不需要发电机之间的任何通信链接，有关馈线阻抗的任何知识以及任何本地负载测量。