An Innovative, Adaptive Faulty Signal Rectifier Along with a Switching Controller for Reliable Primary Control of GC-VSIs in CPS-Based Modernized Microgrids
An Innovative, Adaptive Faulty Signal Rectifier Along with a Switching Controller for Reliable Primary Control of GC-VSIs in CPS-Based Modernized Microgrids
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DOI：
10.1109/tpel.2020.3042796
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发表时间：
2021-07
影响因子：
6.7
通讯作者：
M. Davari;M. P. Aghababa;F. Blaabjerg;M. Saif
中科院分区：
文献类型：
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作者：
M. Davari;M. P. Aghababa;F. Blaabjerg;M. Saif
如今，使用网络物理系统(CPSS)的网络控制要求工程师从设计过程的一开始就将“故障信号”考虑到控制中。因此，必须深入研究能够处理并容忍故障信号的综合控制方法，并从一开始就将其融入到设计过程中。提出了一种新颖可靠的基于滑模故障信号整流器的有功/无功可控并网电压型逆变器(以下简称GC-VSI)控制方法。本文将其称为“容错”控制。这些故障信号可以从任何来源到达GC-VSI的控制；例如，如果CPSS发生故障或未能防止与数据完整性相关的问题、网络威胁等，就可能出现故障信号。滑模算法通过校正故障信号使所提出的控制器具有弹性性能。此外，该结构还通过自适应机制进行了增强，使其对故障信号的“未知”性质具有更强的鲁棒性。该自适应规则能够找到故障信号(外部影响控制反馈)的未知界，并将其结合到基于滑模故障信号整流器的控制中，形成容错信号方法。为了设计所提出的控制器，本文进行了深入的理论分析，包括基于Lyapunov判据的稳定性评估。综合仿真和实验结果(结合GC-VSI)表明了本文提出的容错控制器的有效性和可靠性。
Nowadays, networked controls using cyber-physical systems (CPSs) necessitate engineers considering “faulty signals” into the control from the beginning of the design process. Therefore, synthesizing control methods, which are able to deal with faulty signals and tolerate them, must be thoroughly investigated and integrated into the design process from the commencement. This article proposes an innovative, reliable control based on a sliding mode faulty signal rectifier for active-/reactive-power-controlled, grid-connected voltage-source inverters (named GC-VSIs hereinafter). It is called “faulty-signal-tolerant” control in this article. Those faulty signals can reach the GC-VSI's controls from any sources; for example, they may arise provided that the CPSs malfunction or fail to prevent data-integrity-related issues, cyber threats, and more. The sliding mode algorithm provides the proposed controller with resilient performance via rectifying faulty signals. Besides, the proposed structure is enhanced by an adaptive mechanism, which makes it more robust against the “unknown” nature of faulty signals. The adaptation rule is able to find the unknown bounds of faulty signals (which externally impact control feedback) and incorporate them into the control by the sliding-mode-based faulty signal rectifier to form a faulty-signal-tolerant methodology. Thorough theoretical analyses, including stability assessment using the Lyapunov criterion, are provided in order to design the proposed controller. Comprehensive simulations and experimental results (associated with a GC-VSI) show the effectiveness and reliability of the faulty-signal-tolerant controller, which is proposed in this research.