This paper deals with development of a versatile and compact control strategy for voltage source converters in grid-connected and islanded microgrids using synchronous current converters technology. The key feature is its new integrated high-order controller/synchronizer with applicability to both operational modes without strategy rearrangement. Using high-order controllers, on the other hand, results in rather complex analysis and design process, therefore this paper aims at providing a general and simple theme for the design and parameter selection. The controller also provides adaptive and automated current-based grid synchronization. Moreover, the controller realizes a power-source current-controlled microgrid with minimum control loops, as compared to widely adopted voltage controlled microgrids in the literature, with advantages such as fault-ride-through and inherent droop-less power sharing capabilities. Adaptive current-based synchronization and smooth switching to islanding mode provides high flexibility, reliability and only-plug operation capability. Extensive simulation and experimental results are presented to demonstrate performance of the proposed control and management strategy.

本文研究使用同步电流转换器技术为并网和孤岛微电网中的电压源转换器开发一种通用且紧凑的控制策略。关键功能是其新的集成式高阶控制器/同步器，适用于两种操作模式，而无需重新安排策略。另一方面，使用高阶控制器会导致相当复杂的分析和设计过程，因此，本文旨在为设计和参数选择提供一个通用而简单的主题。该控制器还提供自适应和自动的基于电流的电网同步。此外，与文献中广泛采用的电压控制微电网相比，该控制器可实现具有最少控制回路的电源电流控制微电网，具有诸如故障穿越和固有的无下垂功率共享功能等优势。基于自适应电流的同步和平稳切换到孤岛模式可提供高度的灵活性，可靠性和仅插拔操作能力。提出了广泛的仿真和实验结果，以证明所提出的控制和管理策略的性能。