Load adaptive zero-phase-shift direct repetitive control for stand-alone four-leg VSI

Lidozzi, Alessandro; Solero, Luca; Crescimbini, Fabio; Ji, Chao; Zanchetta, Pericle

doi:10.1109/ecce.2015.7310272

Cited by 9 publications

(6 citation statements)

References 16 publications

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“…Therefore, the final scheme of the RC has to be tweaked a little bit. The presented discrete RC is known as direct repetitive controller (DRC) [11], [12]. The delay is now determined by an integer number of samples (N ) and its expression is shown at (6) and Fig.…”

Section: B Repetitive Controller 1) Continuous Domainmentioning

confidence: 99%

“…There are several options for the robustness filter: constant value slightly lower than one, low-pass filter, moving average filter, etc. The stability filter is computed in order to achieve a zero-phaseshift (ZPS) compensator [12], so that the dynamics of the power converter filter are compensated and its influence is attenuated:…”

Section: B Repetitive Controller 1) Continuous Domainmentioning

confidence: 99%

“…In this way, a theoretical zero steady-state error is achieved at the harmonic frequencies. Control techniques which meet this requirement are Proportional-Resonant (PR) controllers [7]- [9] and Repetitive Controllers (RC) [10]- [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distributed Control Alternatives of Modular Power Converters for Hybrid DC/AC Microgrids

Villa

Gómez-Aleixandre

Garcia

2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper proposes a distributed control alternative for modular power converters. The focus is on the use of singlephase power units with embedded control capabilities, namely intelligent Power Electronics Building Block (iPEBB) for power conversion in hybrid DC/AC microgrids. The distributed control is achieved by the use of a versatile controller inside each iPEBB, so that they can operate independently by controlling their own voltage(s)/current(s). For the management of the entire system, a central controller is integrated into the control scheme. The central controller is in charge of the application-level control of the modular power converter, so that it determines the role of each iPEBB and commands the references to achieve the control goals. As a demonstration of the proposed approach, the control of a 4-wire 4-leg STATCOM using 4 independent power units is shown in this paper. For the implementation of the iPEBB control system, two different approaches are evaluated: Proportional-Resonant (PR) and Repetitive Control (RC) alternatives. Analysis is done using direct discrete design. Different simulations as well as experimental results are performed in order to validate the proposed system. The study considers communication delays between the central controller and the iPEBB as well as internal reconstruction of the reference from the central controller command.

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Section: B Repetitive Controller 1) Continuous Domainmentioning

confidence: 99%

Section: B Repetitive Controller 1) Continuous Domainmentioning

confidence: 99%

See 1 more Smart Citation

Distributed Control Alternatives of Modular Power Converters for Hybrid DC/AC Microgrids

Villa

Gómez-Aleixandre

Garcia

2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

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show abstract

“…Repetitive Control (RC) is a useful strategy for tracking/rejecting periodic signals [6], [7]. That given characteristic, makes RC well suited for the control of VSIs [8], [9], [10]. In this case, the intended goal is to produce a sinusoidal voltage with low Total Harmonic Distortion (THD) and good enough transient response.…”

Section: Introductionmentioning

confidence: 99%

Robust Repetitive Control of Power Inverters for Standalone Operation in DG Systems

Ramos

Ruget

Costa‐Castelló

2020

IEEE Trans. Energy Convers.

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Standalone operation of an inverted-based distributed generation unit is performed in voltage control mode. In this mode, it is important that the controller provides tracking and rejection of periodic signals. Strategies like Repetitive Control (RC) are well suited in the voltage control of power inverters. However, the robustness of repetitive controllers is importantly affected by the connected loads. The reason is that the load modifies the dynamics of the system where the design of the RC relies on. Having a low bandwidth action can reduce the problem but with the cost of degrading the voltage waveform and transient response. As an alternative, an H ∞ design is proposed for the RC of voltage source inverters. In this proposal the load is directly treated as an unstructured uncertainty. With this approach, the design procedure directly maximizes the robust stability margin of the system against load variations/uncertainty. Additionally, the analysis provides some insight about the design of the inverter LC filter. Experimental results show that a remarkable Total Harmonic Distortion and good transient response are obtained for a large variety of loads. Index Terms-AC-DC power conversion, voltage control, H ∞ control, robustness, repetitive control, robust control, power inverters.

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“…A central controller, whose control frequency is 1 kHz, calculates the current references for each converter module and send them to each distributed controller. Each controller act independently of the others by using a repetitive control [5]- [7] approach. This distributed control has a higher frequency (10 kHz, 10 times central control frequency).…”

Section: Introductionmentioning

confidence: 99%

Homopolar harmonic injection and grid synchronization in distributed control systems for grid-tied intelligent power electronic blocks in 4-wire 3-phase converters

Gómez-Aleixandre

Villa

Garcı́a

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

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This paper studies two issues related with the use of distributed control for modular power converters based on the use of single-phase power units, namely intelligent Power Electronics Building Block (iPEBB) for power conversion in hybrid DC/AC microgrids. Some issues related to the distributed control are studied in this paper. Homopolar injection for PWM generation becomes more difficult, since each distributed controller calculates (and knows) only its control action. A possible solution is provided, based on the calculation of this homopolar injection by the central controller at 1 kHz. Synchronization with the grid becomes more difficult too, because each controller acts independently, without communication with the other ones (only with the central controller). Two alternatives are studied for this synchronization angle calculation: calculation in the central controller at central control frequency (1 kHz) or in each module at distributed control frequency (10 kHz).

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Load adaptive zero-phase-shift direct repetitive control for stand-alone four-leg VSI

Cited by 9 publications

References 16 publications

Distributed Control Alternatives of Modular Power Converters for Hybrid DC/AC Microgrids

Distributed Control Alternatives of Modular Power Converters for Hybrid DC/AC Microgrids

Robust Repetitive Control of Power Inverters for Standalone Operation in DG Systems

Homopolar harmonic injection and grid synchronization in distributed control systems for grid-tied intelligent power electronic blocks in 4-wire 3-phase converters

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