A battery charger with maximum power point tracking function for low‐power photovoltaic system applications

Chiu, Huang-Jen; Lo, Yu‐Kang; Lee, Ting-Peng; Chen, Qing Su; Yu, Wen-Kuang; Lee, Jian-Xing; Shih, Frank Y.; Mou, Shann-Chyi

doi:10.1002/cta.631

Cited by 24 publications

(20 citation statements)

References 28 publications

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“…This is also the case of renewable energy applications such as distributed photovoltaic generation systems [2,3], fuel cell energy conversion systems, and modern electric vehicles. Such necessities arise in uninterrupted power supplies, automobile high-intensity discharge headlamps, in several medical equipments, among others.…”

Section: Introductionmentioning

confidence: 99%

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Fast‐scale stability limits of a two‐stage boost power converter

Aroudi

Mandal

Giaouris

et al. 2015

Circuit Theory & Apps

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There are many applications in power electronics that demand high step-up conversion ratio between the source and the load. A simple way of achieving such a high voltage ratio is by cascading DC-DC boost converters in a few stages. The individual converters in such a cascaded system are usually designed separately applying classical design criteria. This paper investigates the stability of the overall system of a cascade connection of two boost converters under current mode control. We first demonstrate the bifurcation behavior of the system, and it is shown that the desired periodic orbit can undergo fast-scale period doubling bifurcation leading to subharmonic oscillations and chaotic regimes under parameter variation. The value of the intermediate capacitor is taken as a design parameter, and we determine the minimum ramp slope in the first stage required to maintain stability. It is shown that smaller capacitance values give rise to wider stability range. We explain the bifurcation phenomena using a full-order model. Then, in order to simplify the analysis and to obtain a closed-form expression to explain the previous observation, we develop a reduced-order model by treating the second stage as a current sink. This allows us to obtain design-oriented stability boundaries in the parameter space by taking into account slope interactions between the state variables in the two stages.where m ref1,ON is the slope of the current reference i ref1 during the ON phase to be determined in the 1138 A. EL AROUDI ET AL.

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Section: Introductionmentioning

confidence: 99%

“…Such necessities arise in uninterrupted power supplies, automobile high-intensity discharge headlamps, in several medical equipments, among others. This is also the case of renewable energy applications such as distributed photovoltaic generation systems [2,3], fuel cell energy conversion systems, and modern electric vehicles.…”

Section: Introductionmentioning

confidence: 99%

Fast‐scale stability limits of a two‐stage boost power converter

Aroudi

Mandal

Giaouris

et al. 2015

Circuit Theory & Apps

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“…In the case of a Boost DC-DC converter, the model explained in [29] could be used. Boost DC-DC converters are common in both grid-connected and in isolated photovoltaic applications [30]. Buck-derived isolated DC-DC converters, like the soft-switching Forward converter described in [31], are also an option for this kind of applications.…”

Section: A Small-signal Modelmentioning

confidence: 99%

An Adaptive Robust Predictive Current Control for Three-Phase Grid-Connected Inverters

Espı́

Castelló

Garcı́a-Gil

et al. 2011

IEEE Trans. Ind. Electron.

160

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In photovoltaic (PV) double-stage grid-connected inverters a high frequency DC-DC isolation and voltage step-up stage is commonly used between the panel and the grid-connected inverter. This paper is focused on the modeling and control design of DC-DC converters with Peak Current mode Control (PCC) and an external control loop of the PV panel voltage, which works following a voltage reference provided by a maximum power point tracking (MPPT) algorithm. In the proposed overall control structure the output voltage of the DC-DC converter is regulated by the grid-connected inverter. Therefore, the inverter may be considered as a constant voltage load for the development of the small-signal model of the DC-DC converter, whereas the PV panel is considered as a negative resistance. The sensitivity of the control loops to variations of the power extracted from the PV panel and of its voltage is studied.The theoretical analysis is corroborated by frequency response measurements on a 230W experimental inverter working from a single PV panel. The inverter is based on a Flyback DC-DC converter operating in discontinuous conduction mode (DCM) followed by a PWM full-bridge single-phase inverter. The time response of the whole system (DC-DC + inverter) is also shown to validate the concept.

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“…In addition, a three-terminal switch (TTS) model was applied to simplify the PSFB-PCDR [13][14][15]. Moreover, studies [16][17][18][19] have mentioned several charge strategies for rechargeable batteries. In [16], the power stage topology of the battery charger was a boost converter, which could step up the low input voltage from the photovoltaic cell, and using the control technologies of the maximum power point tracking and the pulse-charge scheme, the fast maximum power point tracking could be achieved during a narrow charge period.…”

Section: Introductionmentioning

confidence: 99%

A Reformatory Model Incorporating PNGV Battery and Three-Terminal-Switch Models to Design and Implement Feedback Compensations of LiFePO4 Battery Chargers

Pai

2019

Electronics

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This study developed and implemented a LiFePO4 battery pack (LBP) rapid charger. Using the three-terminal switch and partnership for a new generation of vehicles (PNGV) battery models, this study could obtain a small-signal system matrix to derive transfer functions and further analyze frequency responses for the charge voltage and current loops; therefore, both voltage and current feedback controllers could be designed to fulfill the constant-voltage (CV) and constant-current (CC) charges. To address practical applications, the proposed equivalent model also considered the wire resistance-inductance of the power cable. According to the derived high-order transfer function, the pole-zero break frequency in the Bode plot was observed that approximated the practical measurement; therefore, the pole-zero compensation could be accomplished for both charge loop requirements. Moreover, the design features for implementing the CV and CC charges are presented in detail herein, and the current overshoot during the start-up phase could be mitigated using the method of zero break frequency shifting and a novel proportional shifting proportional-integral control. The LBP parameter estimations, model construction processes, and frequency response analyses are also presented. The feedback compensation design based on the proposed model was validated through simulations and experiments. The results were determined to be in excellent agreement with theoretical derivations.

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A battery charger with maximum power point tracking function for low‐power photovoltaic system applications

Cited by 24 publications

References 28 publications

Fast‐scale stability limits of a two‐stage boost power converter

Fast‐scale stability limits of a two‐stage boost power converter

An Adaptive Robust Predictive Current Control for Three-Phase Grid-Connected Inverters

A Reformatory Model Incorporating PNGV Battery and Three-Terminal-Switch Models to Design and Implement Feedback Compensations of LiFePO4 Battery Chargers

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