Abstract This paper presents the design of an embedded control system and its implementation on a DC-AC bidirectional converter for the interconnection of a DC Microgrid (MG) with the AC Main Network (MN). This control system was designed in LabVIEW and implemented on the NI myRIO platform, and it was used for the synchronization of the MG with the MN. Its main goal is to keep the stability of the DC bus when energy is supplied to or extracted from the MN. The MG is composed of two 500 W photovoltaic panel arrays (PAs), each with a Boost DC-DC converter to generate a DC bus of 190 V, and a DC-AC bidirectional converter that interconnects the MG with the MN. The control system was tested considering nonl-inear loads such as computers, commercial fluorescent lamps, and LED, with the aim to analyze the response of the system to real life conditions. Results show that the embedded control system is capable to stabilize the DC bus at a voltage level of 190 V ± 5% when interacting with the different non-linear loads connected to the MG. This is an improvement on the control of the voltage variation previously presented in the literature of 190 V ± 10%.

中文翻译：

---

直流微电网与交流主网互联嵌入式控制系统的设计与实现

摘要 本文介绍了嵌入式控制系统的设计及其在 DC-AC 双向转换器上的实现，用于将直流微电网 (MG) 与交流主网络 (MN) 互连。该控制系统在LabVIEW中设计并在NI myRIO平台上实现，用于MG与MN的同步。其主要目标是在向 MN 提供能量或从 MN 提取能量时保持 DC 总线的稳定性。MG 由两个 500 W 光伏电池板阵列 (PA) 组成，每个都带有一个升压 DC-DC 转换器以生成 190 V 的直流总线，以及一个 DC-AC 双向转换器将 MG 与 MN 互连。控制系统在考虑非线性负载（如计算机、商用荧光灯和 LED）的情况下进行了测试，目的是分析系统对现实生活条件的响应。结果表明，当与连接到 MG 的不同非线性负载交互时，嵌入式控制系统能够将直流总线稳定在 190 V ± 5% 的电压水平。这是对先前在文献中提出的 190 V ± 10% 电压变化控制的改进。