Abstract Due to potential dynamic interactions among dc microgrid power converters, the performance of some of their control loops can vary from the designed behavior. Thus, online monitoring of different control loops within a dc microgrid power converter is highly desirable. This paper proposes the simultaneous identification of several control loops within dc microgrid power converters, by injecting orthogonal pseudo-random binary sequences (PRBSs), and measuring all the loop gains in one measurement cycle. The identification results can be used for different purposes such as controller autotuning, impedance shaping, etc. Herein, an example of output impedance estimation and shaping based on locally-measured loop gains is presented. The proposed identification technique and its application in output impedance shaping are validated on an experimental dc microgrid prototype, composed of three droop-controlled power converters.

中文翻译：

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直流微电网功率转换器中基于 PRBS 的环路增益识别和输出阻抗整形

摘要 由于直流微电网功率转换器之间潜在的动态相互作用，它们的一些控制回路的性能可能与设计行为不同。因此，非常需要对直流微电网功率转换器内的不同控制回路进行在线监测。本文提出了通过注入正交伪随机二进制序列 (PRBS) 并在一个测量周期内测量所有环路增益来同时识别直流微电网功率转换器内的多个控制环路。识别结果可用于不同目的，例如控制器自动调谐、阻抗整形等。这里，给出了基于本地测量的环路增益的输出阻抗估计和整形的示例。