Power Optimization for Photovoltaic Microconverters Using Multivariable Newton-Based Extremum Seeking

Ghaffari, Azad; Krstić, Miroslav; Seshagiri, Sridhar

doi:10.1109/tcst.2014.2301172

Cited by 67 publications

(21 citation statements)

References 17 publications

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“…Ghaffari et al [25] have suggested Newton-based ES algorithm that concurrently uses estimates of the gradient and Hessian in the peak power tracking. The convergence rate of such a plan to the MPP was independent of the Hessian, with tunable transient presentation that is independent of environmental conditions.…”

Section: Recent Research Work: a Brief Reviewmentioning

confidence: 99%

Enhancement of PQ in grid connected PV system using hybrid technique

Sujatha

S²

2018

Ain Shams Engineering Journal

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This paper proposed a hybrid technique based on power quality (PQ) enhancement in grid connected Photovoltaic (PV) system. The hybrid technique is the combined performance of both the Radial Basis Function Neural Network (RBFNN) and Proportional Integral (PI) controller. The primary intention of the proposed method is to predict the adaptive gain parameters for both the normal and abnormal environment in the grid side. In the proposed method, the RBFNN is trained with input parameters such as grid power variations and the target gain parameters of the PI controller. During the testing time, the RBFNN predicts the gain parameters of the PI controller as per the grid side parameter variation and the PQ of the grid side has been enhanced. Then the proposed method is implemented in the MATLAB/Simulink platform and the effectiveness is examined by comparison analysis with the conventional techniques. Ó 2016 Production and hosting by Elsevier B.V. on behalf of Ain Shams University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Section: Recent Research Work: a Brief Reviewmentioning

confidence: 99%

Enhancement of PQ in grid connected PV system using hybrid technique

Sujatha

S²

2018

Ain Shams Engineering Journal

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“…Due to simplicity and robust nature, PO and curve fitting techniques are widely used. MPPT techniques and algorithms have gained attention of power system researchers [70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87] due to its dominant advantages over conventional techniques. Table 2 shows some commonly used control strategies for PV-MPPT and EUE obtained.…”

Section: Maximum Power Point Tracking (Mppt) Strategiesmentioning

confidence: 99%

Decentralized Autonomous Hybrid Renewable Power Generation

Kumar

Palwalia

2015

Journal of Renewable Energy

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Power extension of grid to isolated regions is associated with technical and economical issues. It has encouraged exploration and exploitation of decentralized power generation using renewable energy sources (RES). RES based power generation involves uncertain availability of power source round the clock. This problem has been overcome to certain extent by installing appropriate integrated energy storage unit (ESU). This paper presents technical review of hybrid wind and photovoltaic (PV) generation in standalone mode. Associated components like converters, storage unit, controllers, and optimization techniques affect overall generation. Wind and PV energy are readily available, omnipresent, and expected to contribute major future energy market. It can serve to overcome global warming problem arising due to emissions in fossil fuel based thermal generation units. This paper includes the study of progressive development of standalone renewable generation units based on wind and PV microgrids.

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“…DC/DC power converters play a key role in various emerging applications including photovoltaic systems [1], [2], wind power systems [3], electric vehicles [4], dc micro-grids [5], etc, where a voltage, current or power regulation is required and therefore a wide variety of control techniques has been proposed in the literature to achieve the desired regulation scenario. Traditional control methods introduce a ProportionalIntegral (PI) controller designed based on the small-signal model of the converter [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Current-Limiting DC/DC Power Converters

Konstantopoulos

Zhong

2019

IEEE Trans. Contr. Syst. Technol.

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Abstract-A new nonlinear control framework that guarantees the desired regulation (voltage, current or power) with an inherent current-limiting capability for different types of dc/dc power converters is presented in this paper. This framework is based on the idea of applying a virtual resistance in series with the inductor of the converter, which changes according to nonlinear dynamics that depend on the control task. Without requiring any knowledge of the converter inductance, capacitance or the load, the controller structure is appropriately formulated for each power electronic system based on the nonlinear model of the converter. Using input-to-state stability theory, it is proven that the inductor current remains below a maximum value at all times, even during transients, independently from load and input voltage variations. This offers an inherent current-limiting property of the converter under faults, input voltage sags and unrealistic power demands without the need of external protection mechanisms, saturation units or current limiters. Extensive simulation and experimental results validate the effectiveness of the proposed control scheme and its current-limiting property, with comparison to traditional control strategies.

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Power Optimization for Photovoltaic Microconverters Using Multivariable Newton-Based Extremum Seeking

Cited by 67 publications

References 17 publications

Enhancement of PQ in grid connected PV system using hybrid technique

Enhancement of PQ in grid connected PV system using hybrid technique

Decentralized Autonomous Hybrid Renewable Power Generation

Current-Limiting DC/DC Power Converters

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