Ripple-port module-integrated inverter for grid-connected PV applications

Harb, Souhib; Mirjafari, Mehran; Balog, Robert S.

doi:10.1109/ecce.2012.6342693

Cited by 16 publications

(18 citation statements)

References 18 publications

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“…The controller relies on measurements of two voltage sensors: the PV input voltage ( ) and the MPPT converter output voltage ( ), as shown in Fig 1. Measuring the output voltage does not require additional sensors as the output voltage is already monitored in many applications, including microgrids [34], battery charge controllers [35], gridconnected inverters [36], and load monitoring [37]. Without loss of generality, the load shown in Fig.…”

Section: Theoretical Foundationsmentioning

confidence: 99%

An Adaptive Model Predictive Controller for Current Sensorless MPPT in PV Systems

Metry

Balog

2020

IEEE Open J. Power Electron.

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Finite control set model predictive control (MPC) is a model-based control method that can include multi-objective optimization, constrained control, adaptive control, and online auto-tuning of weighting factors all in a single controller that exhibits fast dynamic tracking. This paper utilizes the model-based framework of MPC to develop a sensorless current maximum power point tracking (MPPT) algorithm. Eliminating the current sensor can reduce the cost and improve the reliability of the photovoltaic system. This paper also utilizes constrained control and online auto-tuning of MPC to develop an adaptive perturbation MPPT to reduce steady-state oscillation and improve dynamic performance. This paper builds in a single framework the different layers of the MPPT problem: control, estimation, and MPPT. The proposed adaptive perturbation sensorless current mode MPPT (ASC-MPPT) technique performance is compared to the well-known incremental conductance (InCon) MPPT technique. The EN50530 European industrial test standards were used to demonstrate performance.

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Section: Theoretical Foundationsmentioning

confidence: 99%

An Adaptive Model Predictive Controller for Current Sensorless MPPT in PV Systems

Metry

Balog

2020

IEEE Open J. Power Electron.

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“…A full-bridge inverter using sinusoidal pulse-width modulation (SPWM), shown in Fig. 3a, is the simplest converter that can be used for this purpose [16].…”

Section: Introductionmentioning

confidence: 99%

Buck-Plus-Unfolder as the Superior Active Power Decoupling Solution for 400 Vdc/kW-Level Applications

Sadrian

Wang

2020

IEEE Open J. Power Electron.

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In single-phase ac/dc applications where reliability and/or power-density are critical, active power decoupling (APD) circuits can be employed to reduce the required capacitance on the dc-link. Various APD circuits have been proposed so far, all with their advantages and disadvantages. However, many confusions still exist in the literature on this topic which is mainly attributed to a lack of unified and comprehensive assessment criteria. In this paper, first the decisive criteria for a modern APD circuit are established, and the buck APD is identified as the current state-of-the-art, based on them. Then the buck-plus-unfolder topology with triangular current mode (TCM) modulation is proposed as an improvement, and a simple, yet solid foundation is introduced to choose the superior decoupling solution at different specifications. The operation equations for the APD with TCM modulation are derived next, and the operation of the proposed solution is demonstrated using a hardware prototype. Index Terms-Active power decoupling, double line frequency ripple, power density, single-phase PFC, single-phase inverter, triangular current mode (TCM).

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“…However, the effectiveness of this approach is limited because the power quality of the grid current may be seriously deteriorated if the injected harmonics are high, which, of course, should be avoided. It is also possible to reduce the required capacitance by adding an active energy storage compensator either in parallel [18]- [27] or in series [28], [29] with the DC-bus to compensate ripple energy. Recently, this approach has been extensively studied as an effective way to improve system power density and reliability.…”

Section: Introductionmentioning

confidence: 99%

Current-Stress Reduction for the Neutral Inductor of $\theta$ -Converters

Ming

Zhong

2017

IEEE Trans. Power Electron.

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Following the recently proposed θ-converter that reduces voltage ripples, leakage currents and total capacitance required in a single-phase converter, this paper further improves the θ-converter by reducing the current stress of the neutral inductor, by relocating it to the DC side without affecting the other functions of the θ-converter. Based on the average circuit model of the proposed converter, it is found that the current flowing through the neutral inductor can be reduced by at least three times and hence, the size of the inductor can be reduced by at least nine times. How to operate the converter to achieve the reduction of the current stress is discussed in detail. Moreover, the selection criteria on the neutral inductor and other passive components used in the proposed converter are discussed in order to minimise their usage. Intensive experimental results are presented to demonstrate that the proposed converter can indeed reduce the current-stress while the other functions of the θ-converter are not affected.

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Ripple-port module-integrated inverter for grid-connected PV applications

Cited by 16 publications

References 18 publications

An Adaptive Model Predictive Controller for Current Sensorless MPPT in PV Systems

An Adaptive Model Predictive Controller for Current Sensorless MPPT in PV Systems

Buck-Plus-Unfolder as the Superior Active Power Decoupling Solution for 400 Vdc/kW-Level Applications

Current-Stress Reduction for the Neutral Inductor of $\theta$ -Converters

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