A Simplified Design Strategy for Multi-Resonant Current Control of a Grid-Connected Voltage Source Inverter with an LCL Filter

Schiesser, Matthias; Wasterlain, Sébastien; Marchesoni, M.; Carpita, Mauro

doi:10.3390/en11030609

Cited by 22 publications

(15 citation statements)

References 32 publications

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“…The design of the gains corresponding to each suppressed harmonic k have effects only in the vicinity of their corresponding resonant frequency ω , if the controller bandwidth is greater than each of the rejected frequencies ω . Under this restriction k can be obtained as follows [41,42]:…”

Section: Control Objectivesmentioning

confidence: 99%

Four-Level Quasi-Nested Inverter Topology for Single-Phase Applications

Reusser

Young

2021

Electronics

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In this paper, a novel four-level single-phase multilevel converter is introduced, consisting of six active switches arranged in a quasi-nested configuration. The proposed topology synthesizes its output voltage levels with respect to a floating neutral point, using four cascaded capacitors with identical voltage levels. The proposed converter contains a reduced number of components compared to the neutral point clamped (NPC) or active-NPC topologies (ANPC) for the same number of output voltage levels, since it does not require diode or active switch clamping to a neutral point. Moreover, no floating capacitors with asymmetric voltage levels are employed, thereby simplifying the capacitor voltage balancing. The switching operation principles, modulation technique and control scheme for supplying a single-phase resistive-inductive load are addressed in detail. The proposed four-level inverter allows generating an additional output voltage level with the same semiconductor count as conventional three-level inverters such as NPC and ANPC which allows a superior waveform quality, with a THDv reduction of 32.69% in comparison the clamped inverters. Experimental tests carried out in a laboratory-scale setup verify the feasibility of the proposed topology.

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Section: Control Objectivesmentioning

confidence: 99%

Four-Level Quasi-Nested Inverter Topology for Single-Phase Applications

Reusser

Young

2021

Electronics

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“…To improve the quality of injected grid currents under a distorted grid environment, several current control methods have been studied to attenuate the current harmonics. For this purpose, a proportional–resonant (PR) current control design is preferred either in the stationary reference frame or in the synchronous reference frame (SRF) [14, 15]. Another approach uses a harmonic compensation based on the integral sliding mode control and harmonic detector to attenuate the current harmonics with a non‐selective method [16].…”

Section: Introductionmentioning

confidence: 99%

Multiloop current control for an inductive–capacitive–inductive‐filtered grid‐connected inverter with frequency‐adaptive capability under distorted grid environment

Yoon

Kim

2019

IET Power Electronics

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To eliminate the adverse effects of grid voltages such as the harmonic distortion and frequency variation, this study presents a multiloop current control scheme for an inductive-capacitive-inductive-filtered grid-connected inverter. The proposed scheme is achieved by multiloop control structure which is composed of the grid-side current control loop, capacitor voltage control loop, and inverter-side current control loop. This structure has an advantage of seamless mode transfer between the grid-connected mode and islanding mode. In addition, the proposed scheme offers a frequency adaptation capability even under distorted grid environment, providing a high quality of injected current in grid-connected mode. Whereas the conventional schemes require lots of state measurements, the proposed scheme eliminates the need of additional sensing devices by employing a discrete-time state observer. The resonant controllers are implemented in outer grid-side current controller to deal with harmonically distorted grid voltage at the 5th, 7th, 11th, and 13th orders. The proposed scheme ensures the quality of grid currents even in the presence of both the harmonic distortion and frequency change in grid voltages by using only the measurement of the grid-side currents and grid voltages. Simulation and experimental results are given to validate the usefulness of the proposed scheme.

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“…However, a PR controller will cause periodic disturbances at frequencies distinct from its resonant frequency and is unable to turn its control gain independently. The proportional multiple resonant control scheme together with its improved design can address the issue of multi-frequency harmonics compensation efficiently [16][17][18][19]. However, there is no doubt that multiple resonant (or quasi-resonant) controllers will lead to computational cost and significantly increase implementation complexity [20].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of A PMQR-Type Repetitive Control Scheme for Grid-Connected H6 Inverters

Yang

Liu

et al. 2019

Applied Sciences

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There exist several challenges in the implementation of proportional multiple quasi-resonant (PMQR) control strategies in single-phase grid-connected H6 inverters, such as high computational costs and design complexity. To overcome these challenges, this paper proposes a proportional multiple quasi-resonant (PMQR)-type repetitive control (PMQR-type RC) scheme for single-phase grid-connected H6 inverters. In the control scheme, a repetitive controller and a proportional controller run in parallel. The repetitive controller is to improve the steady-state harmonics compensation ability, while the proportional controller can enhance the transient performance of the system. Both theoretical stability analysis and detailed design steps regarding the proposed control scheme are introduced. Finally, comparison results on a typical single-phase grid-connected H6 inverter with LC filter under a variety of control methods verify the capability of suppressing harmonics and the robust performance of the proposed control strategy against grid disturbances.

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A Simplified Design Strategy for Multi-Resonant Current Control of a Grid-Connected Voltage Source Inverter with an LCL Filter

Cited by 22 publications

References 32 publications

Four-Level Quasi-Nested Inverter Topology for Single-Phase Applications

Four-Level Quasi-Nested Inverter Topology for Single-Phase Applications

Multiloop current control for an inductive–capacitive–inductive‐filtered grid‐connected inverter with frequency‐adaptive capability under distorted grid environment

Analysis and Design of A PMQR-Type Repetitive Control Scheme for Grid-Connected H6 Inverters

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