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PRBS-based loop gain identification and output impedance shaping in DC microgrid power converters

机译:基于PRGS的循环增益识别和DC微电网电源转换器中的输出阻抗整形

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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.
机译:由于DC微电网转换器之间的潜在动态相互作用,一些控制环路的性能可能因设计的行为而异。因此,在DC微电网电力转换器内的不同控制环路的在线监测是非常理想的。本文提出了通过注入正交伪随机二进制序列(PRBS)并在一个测量周期中测量所有环路增益,同时识别DC微电网电力转换器内的几个控制环路。识别结果可以用于不同的目的,例如控制器自动调谐,阻抗成形等。在此,呈现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。所提出的识别技术及其在输出阻抗整形中的应用在实验性DC微电网原型上验证,由三个下垂控制的功率转换器组成。

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