Dynamic analysis of solar powered two-stage dc–dc converter with MPPT and voltage regulation

Yadlapalli, Ravindranath Tagore; Rajani, Kandipati; Anuradha, K.

doi:10.1007/s40435-022-00930-8

Cited by 8 publications

(6 citation statements)

References 19 publications

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“…To simplify the parameter selection process, can be considered as two cascaded controllers, 9 and , without any loss of generality [25]. Both 9 and are defined in (7), with parameters J 7 and J ! being equal to 5 78 /5 :9 and 5 78 , respectively.…”

Section: Selecting the Compensator's Fixed Parametersmentioning

confidence: 99%

“…. The compensator is represented by 9 and given in (7), while the IVFF-based PWM modulator is represented by the two gains (J 9 and J ). Past studies often overlooked the impact of IVFF on the open-loop gain , leading to the independent design of VFB and IVFF.…”

Section: ) Modulator's Dynamic Modelmentioning

confidence: 99%

“…Power buses within such systems are subject to transient overvoltage surges, often triggered by adjustments to the power bus's load [4], [5]. Ensuring stable output voltage ( ) and current ( ) in the face of such surges and line and load variations is crucial for overall system reliability [6], [7]. This emphasizes the need for robust controllers, designed for effective closed-loop performance, guaranteeing optimal dynamic and steady-state regulation.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Dynamic Regulation in Buck Converters: Integrating Input-Voltage Feedforward With Voltage-Mode Feedback

Amer,

Abuelnasr,

Ali

et al. 2024

IEEE Access

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DC-DC buck converters in automotive and aerospace applications are often required to handle large disturbances in their input supply and abrupt variations in their loads. This paper proposes a systematic method to combine input-voltage feedforward (IVFF) and voltage-mode feedback (VFB) controllers, aiming to enhance the closed-loop performance of these DC-DC converters. This method relies on the stability boundary locus approach to help select the proper control parameters that achieve strong dynamic stability across the full operating range regardless of practical implementation challenges. Also, an optimization approach is employed to minimize the passive components' area within the compensator, achieving a 79% reduction in integration size compared to conventional designs. The controller was fabricated in a 0.35-µm CMOS technology, occupying a core area of 0.438 mm 2 . The prototype chip was experimentally tested to regulate a buck converter that leverages an e-GaN half-bridge while operating at 1 MHz. Measurement results show a remarkable closedloop performance against line and load variations, reaching up to ±80 V/ms and ±535 mA per 150 µs, respectively. The output remains stable, showcasing very small (< 100 mV) to non-existent spikes and fast recovery periods. In addition, the system shows fast startup times (< 100 µs) with small overshoots (< 1%) observed at the output. The system power efficiency, tested across various loads, peaks at 95.14% while operating at 695 mA load current. It is shown that the combined-controller approach entirely eliminates transient voltage spikes, offering up to 100% improvement in dynamic performance over a standalone VFB controller.INDEX TERMS Buck converter, controller design, DC-DC converter, dynamic regulation, feedforward, GaN half-bridge, high-voltage circuits, stability boundary locus, voltage-mode feedback.

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Section: Selecting the Compensator's Fixed Parametersmentioning

confidence: 99%

Section: ) Modulator's Dynamic Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced Dynamic Regulation in Buck Converters: Integrating Input-Voltage Feedforward With Voltage-Mode Feedback

Amer,

Abuelnasr,

Ali

et al. 2024

IEEE Access

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“…The greatest material to use in the creation of solar cells is silicon because of its high efficiency [12]. Researchers are seeking for a replacement material to reduce material costs despite thin film technology's high efficiency, and they believe this would be a good candidate [13]- [15]. Because thin film technology utilises less material and has layers that are significantly thinner than monocrystalline and polycrystalline solar cells, it is less expensive to create.…”

Section: Solar Cell Materialsmentioning

confidence: 99%

An outline of solar photovoltaic systems impact on environment

Vunnam

Vanithasri

Alla³

2023

Bulletin EEI

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The damaging environmental repercussions of energy production are greatly reduced when renewable energy sources are used. Solar photovoltaic (PV) energy is reliable and secure, and it also includes benefits like no noise, no pollution, easy maintenance, and no environmental harm. Solar PV technology has emerged as the renewable energy source with the greatest rate of expansion worldwide since fossil fuels are soon running out and have a negative influence on the environment. PV modules reduce carbon dioxide emissions, preserving the environment and preventing global warming. The solar cell efficiency is one of the key elements in developing this PV technology. To increase solar cell efficiency for commercial use, the type of material used in production is essential. After serving its purpose, a PV module can be recycled, and environmentally appropriate disposal won't have much of an effect on the environment. In this article, the impact of solar PV systems and their most recent advancements for environmental preservation are discussed.

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“…However, for the delivered power to have a high quality and to improve the efficiency of the photovoltaic system, both the MPPT and voltage regulation are aspects that must be taken into account simultaneously. To satisfy both objectives, the two-stage conversion topology is employed to control the photovoltaic system [20]. Therefore, in this paper the two-stage PV system control for maximum power point tracking and voltage regulation is presented.…”

Section: Introductionmentioning

confidence: 99%

Sliding Mode Control based MPPT and Output Voltage Regulation of a Two-stage Stand-alone PV System

Manuel

Inanc

2022

Preprint

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When it comes to reducing emissions caused by the generation of electricity through conventional sources, among different renewable energies, the solar gains prominence, due to its geographical availability, simplicity of implementation and absence of moving parts. However, the performance of photovoltaic systems is dependent on environmental conditions. Depending on temperature and solar irradiation, the PV system has an operating point where maximum power can be generated. The techniques that are implemented to find this operating point are the so-called maximum power point tracking (MPPT) algorithms. Since weather conditions are variable in nature, the output voltage of the PV system needs to be regulated to remain equal to the reference. Most of the existing studies focus either on MPPT or on voltage regulation of the PV system. In this paper, the two-stage PV system is implemented so that both MPPT and voltage regulation are achieved simultaneously. Additionally, an improved version of the Perturb and Observe (P&O) algorithm based on artificial potential fields (APF), called APF-P&O, is proposed. Sliding Mode Controllers with appropriate control laws are designed for both stages of conversion. Simulations performed in MATLAB/Simulink software prove the superiority of the proposed APF-P&O method over the conventional P&O method in terms of convergence time, output power ripples and sensitivity to step sizes. At the same time, the voltage regulation issue is also solved, where the output voltage is fixed to the value of 32 V, regardless of variations in solar irradiation.

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Dynamic analysis of solar powered two-stage dc–dc converter with MPPT and voltage regulation

Cited by 8 publications

References 19 publications

Enhanced Dynamic Regulation in Buck Converters: Integrating Input-Voltage Feedforward With Voltage-Mode Feedback

Enhanced Dynamic Regulation in Buck Converters: Integrating Input-Voltage Feedforward With Voltage-Mode Feedback

An outline of solar photovoltaic systems impact on environment

Sliding Mode Control based MPPT and Output Voltage Regulation of a Two-stage Stand-alone PV System

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