An accurate MPPT scheme for photovoltaic modular-based conversion units: A robust sensorless predictive approach

Nademi, Hamed; Norum, Lars; Wersland, Sigurd Byrkjedal

doi:10.1109/compel.2017.8013376

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…An optimized sensor-less predictive MPPT algorithm based on optimal model predictive control for MMC based-PV system was proposed in [80]. The algorithm is designed to deal with different shading conditions which allows for fast response to solar irradiance changes with high tracking efficiency compared to P&O and RCC algorithms.…”

Section: B Mppt Controlmentioning

confidence: 99%

Medium Voltage Large-Scale Grid-Connected Photovoltaic Systems Using Cascaded H-Bridge and Modular Multilevel Converters: A Review

et al. 2020

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Medium-voltage (MV) multilevel converters are considered a promising solution for large scale photovoltaic (PV) systems to meet the rapid energy demand. This paper focuses on reviewing the different structures and the technical challenges of modular multilevel topologies and their submodule circuit design for PV applications. The unique structure of the converter's submodule provides modularity, independent control of maximum power point tracking (MPPT), galvanic isolation, etc. Different submodule circuits and MPPT methods to efficiently extract the PV power are reviewed. The integration of the multilevel converters to PV systems suffers unbalanced power generation during partial PV shading conditions. Several balancing strategies to solve this problem are presented and compared to give a better understanding of the balancing ranges and capabilities of each strategy. In addition, the paper discusses recent research advancements, and possible future directions of MV converters-based large-scale PV systems for grid integration.

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Section: B Mppt Controlmentioning

confidence: 99%

Medium Voltage Large-Scale Grid-Connected Photovoltaic Systems Using Cascaded H-Bridge and Modular Multilevel Converters: A Review

et al. 2020

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“…An adaptive linear-neuron-based SM capacitor voltage estimation scheme with a currentless sorting-based capacitor-voltage-balancing approach is proposed in [30]. In [31], a current sensorless maximum power point tracking algorithm for a solar photovoltaic power station based on the MMC is designed.…”

Section: Introductionmentioning

confidence: 99%

A Novel Voltage Sensorless Estimation Method for Modular Multilevel Converters with a Model Predictive Control Strategy

Liao,

Jin,

You

et al. 2023

Energies

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This paper proposes a novel voltage estimation scheme for the modular multilevel converter (MMC) based on model predictive control (MPC). The developed strategy is presented by combining a disturbance observer (DOB) with an adaptive neural network (ANN) for voltage estimation in the MMC. Firstly, the ac-side and dc bus voltages are estimated as the disturbance items of the DOB which acts as the cost function during each control cycle and ensures the minimal computational cost. Then, the submodule (SM) capacitor voltage estimation is achieved based on the ANN with the estimated ac-side and dc bus voltages. The proposed method requires only one current sensor per arm and has a simple structure with three weights to be adjusted. Comprehensive simulation studies and experiments are presented to demonstrate its effectiveness and feasibility. The results indicate that the proposed method has a high accuracy, a fast dynamic response, and no effects on the original MPC performance.

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“…shaded PV modules also negatively affect the generation of unshaded PV modules. The centralized MMC-based PV plant proposed in [1,2] deploys single boost converter for tracking maximum power point and reducing the cost, however the central PV systems are susceptible to problems caused by partial shading or mismatch among PV generators.…”

Section: Introductionmentioning

confidence: 99%

A Reliable Modular Based PV-Battery Hybrid System with Peak Shaving Capability

Sohail¹,

Nademi

Norum³

2018

2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL)

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The driving factors in emerging photovoltaic (PV) systems and battery-energy-storage systems (BESS) are highly scalable feature, modular and flexible structures with superior transformerless performance. The feasibility of Modular Multilevel Converter (MMC) to operate without overall DC-link allows the integration of PV generators and battery strings with its submodules (SMs), whereas each SM acts as an independent voltage source due to its ability to insert/bypass the isolated DClink capacitor. In this paper, MMC topology based-split BESS along with distributed PV generators, integrated into each SM is proposed. The presented flexible energy conversion system extracts the maximum power from all distributed PV generators under substantial partial shading and allows the peak shaving to match the intermittent PV power with the variable power demand from the smart grid. With the absence of common DC-link and presence of large arm power variations, the introduced distributed PV-battery system provides balanced three-phase sinusoidal currents to the grid. A five-level three-phase MMC with proposed distributed PV-battery hybrid topology is developed. The simulation results under fast variations in solar irradiance and power demand by the grid are included, which demonstrate its superior performance.

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An accurate MPPT scheme for photovoltaic modular-based conversion units: A robust sensorless predictive approach

Cited by 6 publications

References 14 publications

Medium Voltage Large-Scale Grid-Connected Photovoltaic Systems Using Cascaded H-Bridge and Modular Multilevel Converters: A Review

Medium Voltage Large-Scale Grid-Connected Photovoltaic Systems Using Cascaded H-Bridge and Modular Multilevel Converters: A Review

A Novel Voltage Sensorless Estimation Method for Modular Multilevel Converters with a Model Predictive Control Strategy

A Reliable Modular Based PV-Battery Hybrid System with Peak Shaving Capability

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