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Maximum perturbation step size in MPP-Tracking control for ensuring predicted PV power settling behavior

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Maximum perturbation step size in MPP-Tracking control for ensuring predicted PV power settling behavior. / Suntio, Teuvo; Kuperman, Alon.

In: Energies, Vol. 12, No. 20, 3984, 19.10.2019.

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Suntio, Teuvo ; Kuperman, Alon. / Maximum perturbation step size in MPP-Tracking control for ensuring predicted PV power settling behavior. In: Energies. 2019 ; Vol. 12, No. 20.

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@article{8ac55618770346459d3a6ffd1afd2b5d,
title = "Maximum perturbation step size in MPP-Tracking control for ensuring predicted PV power settling behavior",
abstract = "The heuristic perturb-and-observe-based maximum-power-point tracking (MPPT) algorithm of photovoltaic (PV) generator is still the most popular technique in use, despite the broad spectrum of developed other MPPT algorithms. The correct direction of the next perturbation step requires that the previous perturbation is settled down properly and the applied perturbation step size is large enough to overcome the PV-power changes induced by the varying irradiation level and/or the power-grid-originated PV-voltage ripple. The requirements for the minimum perturbation step size are well defined in the available literature. The design equations to predict the PV-power settling time are derived by assuming that the PV-interfacing converter operates in continuous conduction mode (CCM). A large perturbation step size may drive the interfacing converter to enter into discontinuous conduction mode (DCM), which will delay the PV-power settling process and destroy the validity of the predicted settling times. In order to avoid confusing the MPPT process, the maximum perturbation step size has to be limited as well. This paper provides theoretical foundations for the proper design of the maximum step size based on the DC-DC interfacing-converter dynamic behavior. The theoretical findings are validated with experiments as well as by simulations by means of a boost-type DC-DC converter and real PV panel.",
keywords = "MPP tracking, Perturbation step size, PV generator, Transient settling time",
author = "Teuvo Suntio and Alon Kuperman",
year = "2019",
month = "10",
day = "19",
doi = "10.3390/en12203984",
language = "English",
volume = "12",
journal = "Energies",
issn = "1996-1073",
publisher = "MDPI",
number = "20",

}

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TY - JOUR

T1 - Maximum perturbation step size in MPP-Tracking control for ensuring predicted PV power settling behavior

AU - Suntio, Teuvo

AU - Kuperman, Alon

PY - 2019/10/19

Y1 - 2019/10/19

N2 - The heuristic perturb-and-observe-based maximum-power-point tracking (MPPT) algorithm of photovoltaic (PV) generator is still the most popular technique in use, despite the broad spectrum of developed other MPPT algorithms. The correct direction of the next perturbation step requires that the previous perturbation is settled down properly and the applied perturbation step size is large enough to overcome the PV-power changes induced by the varying irradiation level and/or the power-grid-originated PV-voltage ripple. The requirements for the minimum perturbation step size are well defined in the available literature. The design equations to predict the PV-power settling time are derived by assuming that the PV-interfacing converter operates in continuous conduction mode (CCM). A large perturbation step size may drive the interfacing converter to enter into discontinuous conduction mode (DCM), which will delay the PV-power settling process and destroy the validity of the predicted settling times. In order to avoid confusing the MPPT process, the maximum perturbation step size has to be limited as well. This paper provides theoretical foundations for the proper design of the maximum step size based on the DC-DC interfacing-converter dynamic behavior. The theoretical findings are validated with experiments as well as by simulations by means of a boost-type DC-DC converter and real PV panel.

AB - The heuristic perturb-and-observe-based maximum-power-point tracking (MPPT) algorithm of photovoltaic (PV) generator is still the most popular technique in use, despite the broad spectrum of developed other MPPT algorithms. The correct direction of the next perturbation step requires that the previous perturbation is settled down properly and the applied perturbation step size is large enough to overcome the PV-power changes induced by the varying irradiation level and/or the power-grid-originated PV-voltage ripple. The requirements for the minimum perturbation step size are well defined in the available literature. The design equations to predict the PV-power settling time are derived by assuming that the PV-interfacing converter operates in continuous conduction mode (CCM). A large perturbation step size may drive the interfacing converter to enter into discontinuous conduction mode (DCM), which will delay the PV-power settling process and destroy the validity of the predicted settling times. In order to avoid confusing the MPPT process, the maximum perturbation step size has to be limited as well. This paper provides theoretical foundations for the proper design of the maximum step size based on the DC-DC interfacing-converter dynamic behavior. The theoretical findings are validated with experiments as well as by simulations by means of a boost-type DC-DC converter and real PV panel.

KW - MPP tracking

KW - Perturbation step size

KW - PV generator

KW - Transient settling time

U2 - 10.3390/en12203984

DO - 10.3390/en12203984

M3 - Article

VL - 12

JO - Energies

JF - Energies

SN - 1996-1073

IS - 20

M1 - 3984

ER -