Parallel operation of distributed power converters is used to realize high rated power and low current ripples with low rated power devices. It is also being preferred since central compensators fail to identify power quality problems reflected on low voltage levels, especially with the new structure of microgrids. This article proposes a novel parallel operation between modularized distributed transformerless unified power quality conditioner (TL-UPQC) for low voltage distribution networks. The operation is intended to improve the grid voltage profile while considering the connected modules rated capacity. The proposed methodology is suitable for smart grid applications where multiple renewable energy sources are integrated with the network. An advanced control technique that allows monitoring, wireless communication and coordination between the connected modules is presented. The proposed control methodology allows modularity and operation flexibility. System characterization has been studied to evaluate the influences of communication delays on overall system stability. The system has been evaluated by controller hardware-in-the-loop testing methodology. The power stage is simulated in a real time digital simulator, while the control algorithm is developed in a digital signal processor. Experimental results including random behavior of a photovoltaic system are presented.

中文翻译：

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具有远程监控管理系统的模块化分布式 TL-UPQC 系统的分析和验证


分布式电源变换器的并联运行用于用低额定功率器件实现高额定功率和低电流纹波。由于中央补偿器无法识别低电压水平反映的电能质量问题，尤其是在微电网的新结构中，它也受到青睐。本文提出了一种用于低压配电网的模块化分布式无变压器统一电能​​质量调节器（TL-UPQC）之间新颖的并行操作。该操作旨在改善电网电压分布，同时考虑所连接模块的额定容量。所提出的方法适用于多种可再生能源与网络集成的智能电网应用。提出了一种先进的控制技术，允许在连接的模块之间进行监控、无线通信和协调。所提出的控制方法允许模块化和操作灵活性。研究了系统特性，以评估通信延迟对整体系统稳定性的影响。该系统已通过控制器硬件在环测试方法进行了评估。功率级在实时数字模拟器中进行模拟，而控制算法则在数字信号处理器中开发。给出了包括光伏系统随机行为的实验结果。