The control flexibility of the power inverters that interface distributed generation can be exploited to incorporate power quality enhancement features in addition to the usual power management control. This article presents a novel control scheme that achieves voltage balance at any node of an ac microgrid regardless of the impedance value of the power network. The collaborative strategy is devoted to set a specific sharing of the balancing currents, thus avoiding the adverse effects of the unbalance compensation by a single inverter. The control scheme uses a complex form of a proportional resonant controller and a communication link. The article presents the stability and sensitivity analysis and the design guidelines for the control parameters. The performance of the control proposal has been tested successfully in a laboratory microgrid setup. Selected experimental results are presented.

中文翻译：

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并网逆变器的并网交流微电网协同电压不平衡消除

可以利用与分布式发电接口的功率逆变器的控制灵活性来整合常规电源管理控制之外的电能质量增强功能。本文提出了一种新颖的控制方案，该方案可在ac微电网的任何节点上实现电压平衡，而与电网的阻抗值无关。协作策略专用于设置平衡电流的特定份额，从而避免了单个逆变器进行不平衡补偿的不利影响。该控制方案使用比例谐振控制器和通信链路的复杂形式。本文介绍了稳定性和灵敏度分析以及控制参数的设计指南。控制提议的性能已在实验室微电网设置中成功测试。