Sliding Mode Based Control of Dual Boost Inverter for Grid Connection

Lopez-Caiza, Diana; Flores‐Bahamonde, Freddy; Kouro, Samir; Santana, Víctor M.; Muller, Nicolas; Chub, Andrii

doi:10.3390/en12224241

Cited by 15 publications

(19 citation statements)

References 25 publications

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“…Nevertheless with a PI controller, a high bandwidth will lead to a low phase margin and eventually to a poorly damped oscillatory response. To mitigate this problem proportional-resonant controllers with infinite gain at the grid frequency is usually used [26,29]. Nevertheless, the PR controller improves the steady-state error and the phase shifting between the controlled variable and its desired time varying reference but slows down the speed response.…”

Section: Grid Current Controller Designmentioning

confidence: 99%

“…In that work, based on the internal model principle, Proportional-Resonant (PR) controllers instead of Proportional-Integral (PI) controllers were used to achieve zero phase and amplitude tracking error demonstrating experimentally that the proposed control meet grid-connection harmonics standards. The grid-connection of the differential boost inverter and the use of PR controller for the grid current loop was also addressed in [26] where a sliding mode control for the inner inductor current loop and a PI controller was used.…”

Section: Introductionmentioning

confidence: 99%

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Multiple-Loop Control Design for a Single-Stage PV-Fed Grid-Tied Differential Boost Inverter

et al. 2020

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This paper focuses on the control design of a differential boost inverter when used in single-stage grid-tied PV systems. The inverter performs both Maximum Power Point Tracking (MPPT) at the DC side and Power Factor Correction at the AC side. At first, the state-space time-domain averaged model of the inverter is derived and the small signal frequency domain model is obtained using a quasi-static approximation in which the inverter is treated as a DC–DC converter with a slowly varying output voltage. Then, the controllers are designed using a three-loop strategy in which the inverter inductor currents loop is used for suitable compensation, the DC Photovoltaic (PV) voltage loop is used for MPPT and the output grid current loop is used for Power Factor Correction (PFC) and active power control. The selection of the control parameters is based on a compromise among suitable system performances such as settling time of the input PV voltage, the sampling period of the MPPT, total harmonic distortion of the output grid current, power factor as well as suppression of subharmonic oscillation for all the range of the operating duty cycle. The resulting design ensures that the oscillations of the voltage, current and power at the DC side and the grid current at the AC side are effectively controlled. The validity of the proposed control design is verified by numerical simulations performed on the switched model of the system demonstrating its robustness and fast response under irradiance variations and MPPT perturbations despite the nonlinearity and complexity of the system.

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Section: Grid Current Controller Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiple-Loop Control Design for a Single-Stage PV-Fed Grid-Tied Differential Boost Inverter

et al. 2020

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“…Therefore, the load connected between the converters outputs will be subjected to an AC sinusoidal voltage with a zero DC component. This control strategy is different from the one used in most of the published works about this inverter topology such as [44,45,47] where the control is performed such that each boost converter generates a DC bias and an AC component. In the low frequency averaged sense, the AC component of each converter is out of phase regarding the other converter.…”

Section: Differential Boost Inverter Under Two-loop Controlmentioning

confidence: 99%

“…Moreover, differential inverter topologies seem to prevail in price and size due to the utilization of small passive elements of DC-DC converters hence improving the efficiency. In contrast to the conventional H-bridge inverter, the differential boost inverter is a flexible DC-AC inverter topology providing voltage step-up capability and could be a potential candidate for many DC-AC electrical energy conversion applications such as for power processing stage fuel-cell energy system [41,42], for high quality sine wave generation with a high oscillation frequency [43], for AC-module microinverters in PV systems such as in [44][45][46] among others.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Subharmonic Oscillation and Slope Compensation for a Differential Boost Inverter

et al. 2020

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This paper focuses on the steady-behavior of a differential boost inverter used for generating a sinewave AC voltage in rural areas. The analysis of its dynamics will be performed using an accurate approach based on discrete time models and Floquet theory and adopting a quasi-static approximation. In particular, the undesired subharmonic oscillation exhibited by the inverter will be analyzed and its boundary in the parameter space will be predicted and delimited. Combining analytical expressions and computational procedures to determine the quasi-static duty cycle, subharmonic oscillation is accurately predicted. It is found that subharmonic oscillation takes place at critical values of the sinewave voltage reference cycle, which can cause distortion to the input current and degrade the harmonic content of the output voltage. The results provide useful information for the design of the boost inverter to avoid distortion caused by subharmonic oscillation. Namely, the minimum value of the compensation slope and the maximum proportional gain of the AC output voltage controller guaranteeing a pure sinewave voltage and clean inductor current during the entire AC cycle will be determined. Numerical simulations performed on the switched model implemented using PSIM© software confirm the theoretical predictions.

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Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

Mohammadhassani

Narm

2021

IET Power Electronics

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Here, a novel control strategy based on sliding mode control for the single‐stage boost inverter is presented. The goal is to achieve a system with robustness against inherent delays and variations in parameters, fast response, and high‐quality AC voltage. Therefore, according to the idea of current‐mode control, a new type of dynamic sliding mode control (DSMC) is proposed to improve the response performance on various input and parameter operation conditions. In comparison with the conventional controllers, the proposed DSMC utilized only a single loop while presenting attractive features such as robustness against parametric uncertainties and input delay by definition new sliding surfaces. Furthermore, the proposed system has a fast and chattering‐free response, provides an appropriate steady‐state error, good total harmonic distortion (THD), while its implementation is very simple. In a fair comparison with conventional sliding mode control, simulations and laboratory experiments verified satisfactory performance and effectiveness of the DSMC method.

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Sliding Mode Based Control of Dual Boost Inverter for Grid Connection

Cited by 15 publications

References 25 publications

Multiple-Loop Control Design for a Single-Stage PV-Fed Grid-Tied Differential Boost Inverter

Multiple-Loop Control Design for a Single-Stage PV-Fed Grid-Tied Differential Boost Inverter

Analysis of Subharmonic Oscillation and Slope Compensation for a Differential Boost Inverter

Dynamic sliding mode control of single‐stage boost inverter with parametric uncertainties and delay

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