Robust Design of Control Structure for Three-Phase Grid-Tied Inverters

Kraemer, Alessandro; Carati, Emerson Giovani; Costa, Jean Patric da; Cardoso, Rafael; Stein, Mille

doi:10.1109/induscon.2018.8627068

Cited by 8 publications

(4 citation statements)

References 23 publications

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“…The resonant controller applied in the current control is widely used in grid tied systems due to the ability to eliminate the steady-state error between the controlled signal and its sinusoidal reference [16]. Although, unlike conventional PR controllers, this structure uses the grid-current (i o ) feedback in the comparison with current reference signal, for generating the error signal for compensation, and also directly in the HC control [15].…”

Section: System Descriptionmentioning

confidence: 99%

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A Generic Robust Model-Based Estimator for Active Damping of Single-Phase GridTied Inverters

Romão¹,

Silva²

2022

Eletrônica de Potência

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This paper presents the design and analysis of a signal estimator with improved robustness applied in the active damping (AD) of a single-phase gridtied inverter with LCL low-pass filter. The proposed estimator is based on the mathematical model of the LCL filter, with resistors in series with the converterside inductor and capacitor for improving robustness. The implementation method is also capable of estimate multiple filter signals. The control strategy presented uses a virtual resistor based AD, that suppresses the resonance ensuring stability and robustness, helping comply with power quality standards, such as IEEE 1547 and IEC 61727. The signal necessary for achieving the AD is obtained through the estimator, dismissing the use of additional sensors. The current control structure uses grid-side current feedback with proportional-resonant controller and harmonic compensation.The system is designed by the root locus approach to achieve stability despite grid parameter variance. The estimator and overall system is analyzed through mathematical modeling, computational simulation and experimental setup. The results show that the estimator presented is capable of providing the necessary AD feedback signal, even with grid inductance variation.

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Section: System Descriptionmentioning

confidence: 99%

“…The current control is performed by a proportional-resonant (PR) controller with harmonic compensation (HC) with an alternative topology [15], using the grid-side current for feedback, resulting in low steady-state error [16].…”

Section: Introductionmentioning

confidence: 99%

A Generic Robust Model-Based Estimator for Active Damping of Single-Phase GridTied Inverters

Romão¹,

Silva²

2022

Eletrônica de Potência

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show abstract

Section: System Descriptionmentioning

confidence: 99%

“…The VSI connection to the main grid must comply with requirements that ensures the safety and energy quality provided by the DG system, hence the VSI is connected to the grid by a low-pass filter which reduces the switching harmonics (KRAEMER et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Damping techniques for grid-connected converters with LCL filter: an overview

Romão

Silva

2021

Semina: Ciênc. Ex. Tech.

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Distributed generation systems, based on renewable energy sources, are typically connected to the main grid by a voltage-source inverter with a low-pass filter. The need for improved efficiency led to the use of third order low-pass filters, such as the LCL configuration, which has resonant behavior. In order to meet energy quality requirements and ensure the systems stability it is necessary to suppress the LCL filters resonance through damping techniques. Therefore, this paper presents an overview of some damping strategies found in literature and its design procedure, applied to a simulated single-phase grid-tied inverter. The comparison of each presented damping methodology characteristics is described, with analysis of advantages and drawbacks for each case.

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Adaptive grid-connected inverter control schemes for power quality enrichment in microgrid systems: Past, present, and future perspectives

2024

Electric Power Systems Research

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Robust Design of Control Structure for Three-Phase Grid-Tied Inverters

Cited by 8 publications

References 23 publications

A Generic Robust Model-Based Estimator for Active Damping of Single-Phase GridTied Inverters

A Generic Robust Model-Based Estimator for Active Damping of Single-Phase GridTied Inverters

Damping techniques for grid-connected converters with LCL filter: an overview

Adaptive grid-connected inverter control schemes for power quality enrichment in microgrid systems: Past, present, and future perspectives

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