Passivity-Based Design of Passive Damping for <i>LCL</i>-Type Grid-Connected Inverters to Achieve Full-Frequency Passive Output Admittance

Ma, Guangda; Xie, Chuan; Li, Cheng; Zou, Jianxiao; Guerrero, Josep M.

doi:10.1109/tpel.2023.3313106

Cited by 9 publications

(4 citation statements)

References 30 publications

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“…In addition, η(s) represent the unmodeled disturbances. By adopting the nominal disturbance model in (12), we prioritize the attenuation of disturbances within a specific frequency domain profile, essentially tailoring the performance characteristics of the controller to the expected disturbance.…”

Section: New Perspective On Gfl Closed Loop-mimo Closed Loop As a Per...mentioning

confidence: 99%

“…The inequality in (40) simply follows from (27). The following proposition uses the definition of S in (19) and the grid disturbance model in (12) to convert the objectives in (40) into the conditions of the feedback controller K.…”

Section: Conditions On Siso Sensitivity For Reference Tracking and Sy...mentioning

confidence: 99%

“…The virtual impedance technique has been proved to be effective in enhancing the damping characteristics of the filter and the stability margins of the GFL inverter [5], [6], [7], [8]. More recently, passivitybased approaches to active damping have gained popularity [9], [10], [11], [12]. Passivity-based active damping is rooted in the concept of a dissipative system within control theory.…”

mentioning

confidence: 99%

“…This approach typically guarantees stability and robustness under a variety of operating conditions and parameter changes, which are common in weak grid scenarios. Passivity-based damping methods, although more complex than virtual impedance, offer a more comprehensive analytical framework and advanced damping schemes [11], [12]. Although active damping methods are effective in reducing filter resonance, they can interfere with the functioning of the current closed loop and phase-locked loop (PLL).…”

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confidence: 99%

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Enhanced Grid-Following (E-GFL) Inverter: A Unified Control Framework for Stiff and Weak Grids

Askarian,

Park,

Salapaka

2024

IEEE Trans. Power Electron.

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This article presents an extensive framework focused on the control design, along with stability and performance analyses, of grid-following (GFL) inverters. It aims to ensure their effective operation under both stiff and weak grid conditions. The proposed framework leverages the coupled algebraic structure of the transmission line dynamics in the dq frame to express and then mitigate the effect of coupled dynamics on the GFL inverter's stability and performance. In addition, we simplify the coupled multiinput multi-output (MIMO) closed-loop system of the GFL into two separate single-input single-output (2-SISO) closed loops for easier analysis and control design. We present the stability, robust stability, and performance of the original GFL MIMO closed-loop system through our proposed 2-SISO closed-loop framework. This approach simplifies both the control design and its analysis. Our framework effectively achieves grid synchronization and active damping of filter resonance via feedback control. This eliminates the need for separate phase-locked loop and virtual impedance subsystems. We also utilize the Bode sensitivity integral to define the limits of GFL closed-loop stability margin and performance. These fundamental limits reveal the necessary tradeoffs between various performance goals, including reference tracking, closed-loop bandwidth, robust synchronization, and the ability to withstand grid disturbances. Finally, we demonstrate the merits of our proposed framework through detailed simulations and experiments. These showcase its effectiveness in handling challenging scenarios, such as asymmetric grid faults, low-voltage operation, and the balance between harmonic rejection and resonance suppression.

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Section: New Perspective On Gfl Closed Loop-mimo Closed Loop As a Per...mentioning

confidence: 99%