A Multivariable Perturb-and-Observe Maximum Power Point Tracking Technique Applied to a Single-Stage Photovoltaic Inverter

Petrone, G.; Spagnuolo, G.; Vitelli, M.

doi:10.1109/tie.2010.2044734

Cited by 125 publications

(49 citation statements)

References 21 publications

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“…The adoption of the unipolar modulation SPWM regulated the injected grid current and a PV simulator replaced the PV panel. The DC source of DC-AC inverter has been given through the Boost DC-DC converter by applying the P&O MPPT method that guarantees simplicity and effectiveness [9][10][11][12]. …”

Section: Resultsmentioning

confidence: 99%

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A Systematic Method for Designing a PR Controller and Active Damping of the LCL Filter for Single-Phase Grid-Connected PV Inverters

2014

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Abstract:The Proportional Resonant (PR) current controller provides gains at a certain frequency (resonant frequency) and eliminates steady state errors. Therefore, the PR controller can be successfully applied to single grid-connected PV inverter current control. On the contrary, a PI controller has steady-state errors and limited disturbance rejection capability. Compared with the L-and LC filters, the LCL filter has excellent harmonic suppression capability, but the inherent resonant peak of the LCL filter may introduce instability in the whole system. Therefore, damping must be introduced to improve the control of the system. Considering the controller and the LCL filter active damping as a whole system makes the controller design method more complex. In fact, their frequency responses may affect each other. The traditional trial-and-error procedure is too time-consuming and the design process is inefficient. This paper provides a detailed analysis of the frequency response influence between the PR controller and the LCL filter regarded as a whole system. In addition, the paper presents a systematic method for designing controller parameters and the capacitor current feedback coefficient factor of LCL filter active-damping. The new method relies on meeting the stable margins of the system. Moreover, the paper also clarifies the impact of the grid on the inverter output current. Numerical simulation and a 3 kW laboratory setup assessed the feasibility and effectiveness of the proposed method. OPEN ACCESSEnergies 2014, 7 3935

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Section: Resultsmentioning

confidence: 99%

“…By sampling the PV panel current and the voltage a proper MPPT algorithm can be ran. Papers in the literature present different MPPT algorithms [9][10][11][12]. The DC bus voltage control algorithm gives the injected current reference.…”

Section: Introductionmentioning

confidence: 99%

A Systematic Method for Designing a PR Controller and Active Damping of the LCL Filter for Single-Phase Grid-Connected PV Inverters

2014

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“…Although both the solar cell and DC/DC transform circuits are strongly nonlinear, the two can be considered as linear circuits in unit time intervals. So as with load, this paper will transform circuit in circuit equivalent load size, to be able to follow the solar battery internal resistance in the change of environmental changes, so as to achieve the effect of the MPPT [1][2][3][4][5][6][7][8] . The principle of perturbation observation method is shown in Figure 3.…”

Section: Mppt Control Modelingmentioning

confidence: 99%

Design and Simulation of Maximum Power Tracking Scheme for Improved Disturbance Observation

Chen¹,

Chen²,

Yang³

et al. 2018

dteees

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Abstract. In order to improve the utilization rate and cost of photovoltaic panels, MPPT control strategy is needed to make the PV array get the maximum power output because of the change of environmental conditions. Perturbation and Observation method is one of the most widely used MPPT algorithms in the traditional maximum power tracking algorithm, which is simple and easy to implement. However, the traditional fixed-length perturbation and observation method is easy to oscillate near the maximum power point when the step size is large. Although the tracking accuracy is small when the step size is small, the tracking time is long and the tracking efficiency is not achieved. This paper presents an improved method of variable step size.

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“…Despite this work considers the capacitor linking the PV source and the power stage, it is not applicable to grid-connected PV systems since the DC/DC converter provides an output voltage lower than the one provided by the PV source. Such a condition is incompatible with the high input-voltage required by classical buck inverters for grid-connection [22,24]. Moreover, this work also assumes constant the load impedance, and it does not analyze the switching frequency, which is an important parameter for implementation.…”

Section: Introductionmentioning

confidence: 99%

“…The simulation also considers an irradiance perturbation from 1000 W/m As anticipated before, a second simulation scheme is used to test the SMC under high boosting conditions and interacting with a detailed grid-connected inverter. Such a scheme is presented in Figure 15 [24], which includes a closed-loop inverter with two control objectives: provide a given power factor and regulate the DC-link voltage. The inverter is designed to operate at 110 VAC@60 Hz with an average DC-link voltage equal to 220 V. The DC-link is formed by C b " 14 µF, which at 1000 W/m 2 experiment a large 120 V peak-to-peak voltage oscillation superimposed to the DC component, this corresponding to a 55% perturbation.…”

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confidence: 99%

Sliding-Mode Controller for Maximum Power Point Tracking in Grid-Connected Photovoltaic Systems

Valencia

Ramos‐Paja

2015

Energies

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Abstract:The maximum power point tracking (MPPT) of photovoltaic systems must be as fast and accurate as possible to increase the power production, which eventually increases the PV system profitability. This paper proposes and mathematically analyses a sliding-mode controller to provide a fast and accurate maximum power point tracking in grid-connected photovoltaic systems using a single control stage. This approach avoids the circular dependency in the design of classical cascade controllers used to optimize the photovoltaic system operation, and at the same time, it reduces the number of controllers and avoids the use of linearized models to provide global stability in all the operation range. Such a compact solution also reduces the system cost and implementation complexity. To ensure the stability of the proposed solution, detailed mathematical analyses are performed to demonstrate the fulfillment of the transversality, reachability and equivalent control conditions. Finally, the performance of the proposed solution is validated using detailed simulations, executed in the power electronics simulator PSIM, accounting for both environmental and load perturbations.

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A Multivariable Perturb-and-Observe Maximum Power Point Tracking Technique Applied to a Single-Stage Photovoltaic Inverter

Cited by 125 publications

References 21 publications

A Systematic Method for Designing a PR Controller and Active Damping of the LCL Filter for Single-Phase Grid-Connected PV Inverters

A Systematic Method for Designing a PR Controller and Active Damping of the LCL Filter for Single-Phase Grid-Connected PV Inverters

Design and Simulation of Maximum Power Tracking Scheme for Improved Disturbance Observation

Sliding-Mode Controller for Maximum Power Point Tracking in Grid-Connected Photovoltaic Systems

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