This paper proposes an enhanced control for a converter based three phase line impedance emulator in order to improve clean energy sources integration. In fact, the proposed emulator is used to perform tests related to the integration of renewable energy systems with public grids according to international codes and standards. The emulator control includes a power converter control and an impedance emulation algorithm. Conventional power converter controls for line impedance emulators are based on PI or resonant controllers. However, the stability region of this kind of controls is limited. In addition, existing impedance emulation algorithms are complicated, difficult to implement and very greedy in computing resources. In view of this, the presented work investigates the dead beat predictive control for the power converter associated to an optimized impedance emulation algorithm. The proposed control is characterized by its fast dynamic response, simple design and minimized computational resources, while the proposed impedance emulation algorithm is characterized by its precision, efficiency and decoupled inductive and resistive impedance components variation. Indeed, these characteristics allow flexible, precise and accurate impedance emulation based tests. Simulation and experimental results for the line impedance emulator are presented to prove the performances and the efficiency of the proposed control strategy.

本文提出了一种基于转换器的三相线阻抗仿真器的增强控制，以改善清洁能源的集成。实际上，根据国际规范和标准，建议的仿真器用于执行与可再生能源系统与公共电网集成相关的测试。仿真器控制包括功率转换器控制和阻抗仿真算法。用于线路阻抗仿真器的常规功率转换器控制基于PI或谐振控制器。但是，这种控制的稳定区域是有限的。另外，现有的阻抗仿真算法复杂，难以实现并且在计算资源方面非常贪婪。鉴于此，提出的工作研究了与优化阻抗仿真算法相关的功率转换器的无差拍预测控制。所提出的控制的特点是其快速的动态响应，简单的设计和最少的计算资源，而所提出的阻抗仿真算法的特点是其精度，效率以及感性和电阻性阻抗分量的去耦。实际上，这些特性允许进行灵活，精确和准确的基于阻抗仿真的测试。给出了线阻抗仿真器的仿真和实验结果，以证明所提出的控制策略的性能和效率。提出的阻抗仿真算法具有精度高，效率高，感性和阻性阻抗分量变化解耦的特点。实际上，这些特性允许进行灵活，精确和准确的基于阻抗仿真的测试。给出了线阻抗仿真器的仿真和实验结果，以证明所提出的控制策略的性能和效率。提出的阻抗仿真算法具有精度高，效率高，感性和阻性阻抗分量解耦的特点。实际上，这些特性允许进行灵活，精确和准确的基于阻抗仿真的测试。给出了线阻抗仿真器的仿真和实验结果，以证明所提出的控制策略的性能和效率。