An Adaptive Control Scheme for Flexible Power Point Tracking in Photovoltaic Systems

Tafti, Hossein Dehghani; Sangwongwanich, Ariya; Yang, Yongheng; Pou, Josep; Konstantinou, Georgios; Blaabjerg, Frede

doi:10.1109/tpel.2018.2869172

Cited by 107 publications

(70 citation statements)

References 30 publications

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“…where I pv0 indicates the steady-state operating point of the PV array output current, and K pv is a function of I pv0 . The dynamics of the Boost converter is presented by the average model, and it is given by (3)- (5).…”

Section: A the Dynamics Of Front-end Circuitmentioning

confidence: 99%

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Structure-Preservation Model Aggregation for Two-Stage Inverters Based Large-Scale Photovoltaic System

et al. 2020

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With the increasing penetration level of large-scale photovoltaic (PV) generator connected to the grid, an accurate simulation model is required for the dynamic analysis of the PV system. However, the detailed electromagnetic simulation of the large-scale system is complex and the dynamic response capability is estimated with obstacle caused by large computational burdens. Therefore, a precise dynamic aggregated model is indispensable for the displacement of the large-scale PV system. The structurepreservation based aggregated model with comprehensive equivalent parameters for large-scale PV system is proposed in this paper. A complete two-stage PV system model is established to analyze the dynamics of the system. Then, the aggregation method is obtained by comparing the dynamic equations of the detailed model with the aggregated model, which is based on the energy relationship in the PV system. Furthermore, four different case studies are considered including the aggregation of identical and different ten parallelconnected PV units both under the same irradiance condition, and the aggregation of different ten parallelconnected PV units under different irradiance and weak grid scenarios, where the aggregation models are obtained through the proposed equivalent modeling method. Finally, the effectiveness of the proposed aggregation method is verified by the simulation results from PSCAD/EMTDC platform, and the consistency between the aggregated model and the detailed model is confirmed under different disturbances of irradiance variation, and continuous symmetric and asymmetric grid faults.

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Section: A the Dynamics Of Front-end Circuitmentioning

confidence: 99%

“…where x o is the dummy state variable. In general, the whole dynamics of the front-end circuit including controller are denoted as equations (2)- (5), and (7).…”

Section: A the Dynamics Of Front-end Circuitmentioning

confidence: 99%

Structure-Preservation Model Aggregation for Two-Stage Inverters Based Large-Scale Photovoltaic System

et al. 2020

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“…Among modern grid codes, constant power regulation is considered the most common technique alongside the maximum power point tracking (MPPT) operation [4]. For low power scale PV application, it is important to extract the maximum available power from the PV source at various atmospheric conditions, which is known as MPPT [5]. However, at high power levels, the MPPT operation is allowed if the PV power is lower than a certain threshold.…”

Section: Introductionmentioning

confidence: 99%

Dual-Mode Power Operation for Grid-Connected PV Systems with Adaptive DC-link Controller

et al. 2021

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Photovoltaic (PV) power systems are integrated with high penetration levels into the grid. This in turn encourages several modifications for grid codes to sustain grid stability and resilience. Recently, constant power management and regulation is a very common approach, which is used to limit the PV power production. Thus, this article proposes dual-mode power generation algorithm for grid-connected PV systems. The developed system considers the two-stage PV configuration for implementation, where the dual-mode power generation technique is executed within the DC–DC conversion (boost) stage. Most of the techniques adopted for dual-mode power operation employ the conventional perturb and observe method, which is known with unsatisfactory performance at fast-changing atmospheric conditions. Considering this issue, this study suggests a modified maximum power point tracker for power extraction. Furthermore, a new adaptive DC-link controller is developed to improve the DC-link voltage profile at different operating conditions. The adaptive DC-link controller is compared with the traditional PI controller for voltage regulation. The inverter control is accomplished using finite-set model predictive control with two control objectives, namely reference current tracking and switching frequency minimization. The overall control methodology is evaluated at different atmospheric and operating conditions using MATLAB/Simulink software.

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“…The fuzzy logic based modified P&O mppt algorithm has been proposed in [12].here the duty cycle is controlled by the adaptive step size method. Though the modified fuzzy based mppt algorithm track the mpp ,but the efficiency is less than 99%.…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Resistance Perturbation Based MPPT Algorithm for Photovoltaic Applications

et al. 2020

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This paper proposes a Resistance perturbation based maximum power point tracking (MPPT) with an adaptive control limit algorithm to extract the maximum power from solar photovoltaic (PV) array. This algorithm consists of two main functions, namely 1) resistance perturbation & observation (RP&O) and 2) adaptive resistance control (ARC) limit. The RP&O operates the PV array at maximum power point (MPP), and the ARC limit continuously monitors the resistance of the PV R pv to determine the operating limit of MPP. The ultimate aim of proposing this algorithm is to reduce the oscillations and improve MPP's tracking performance for sudden variation in temperature and irradiance conditions. Furthermore, it does not require an expensive pyranometer or temperature sensor to track the MPP of the PV array. This paper also compares the proposed and conventional MPPT algorithm's performance. Its validation results in both MATLAB/Simulink and experimental studies are presented under constant and sudden changes in irradiance conditions.

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An Adaptive Control Scheme for Flexible Power Point Tracking in Photovoltaic Systems

Cited by 107 publications

References 30 publications

Structure-Preservation Model Aggregation for Two-Stage Inverters Based Large-Scale Photovoltaic System

Structure-Preservation Model Aggregation for Two-Stage Inverters Based Large-Scale Photovoltaic System

Dual-Mode Power Operation for Grid-Connected PV Systems with Adaptive DC-link Controller

An Adaptive Resistance Perturbation Based MPPT Algorithm for Photovoltaic Applications

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