A multi-input hybrid converter for small off-grid solar photo-voltaic system

Bodele, Nikhil; Kulkarni, P. S.

doi:10.1109/stpec49749.2020.9297747

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…By using the multi-string input mode, the deficiency of the independent connection mode can be avoided. Each string is connected to the DC-DC converter for the control purpose, therefore ensuring the high-efficiency power generation and reducing the effects brought by shadings, and it becomes the new trend of research and application of distributed PV power generation (Chen et al, 2007;Gonzalez et al, 2007;Fortunato et al, 2008;Veerachary, 2008;Soleimani et al, 2012;Abdalla et al, 2013;Rosli et al, 2014a;Rosli et al, 2014b;Haghighian and Hosseini, 2015;Moon et al, 2015;Tampubolon et al, 2015;Sochor and Akagi, 2016;Chander and Kumar, 2017;Abe et al, 2020;Bodele and Kulkarni, 2020;Mao et al, 2020;Zhang and Jiang, 2020;Ahmed et al, 2021). However, the existing research and applications mainly focus on circuit topologies and maximum power point tracking (MPPT) control algorithms, which are based on the fact that the connection mode is known in advance.…”

Section: Distributed Pv Power Generation Systems and Input String Typesmentioning

confidence: 99%

Research on Advanced Control Method of Multiple Photovoltaic Strings Input Type Recognition

Wang

Zhang

Zhang³

et al. 2022

Front. Energy Res.

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In order to decrease the performance effect of a single string in part of a photovoltaic (PV) array and increase the adaptive PV power generation, independent multiple series-connected PV strings are usually adopted in PV system projects to implement the input configuration. Besides, the conversion circuits with multipath inputs are required to be designed for the corresponding inverters to carry out the control algorithms. Since independent and parallel-connected modes exist for the PV string input in actual engineering projects, it is of great significance to effectively identify different PV inputs automatically for inverter inputs. In order to solve the problems of high hardware circuit requirements and complicated control algorithms in most of the existing control methods, a multiple PV string input type recognition method is proposed. Through the proposed software control algorithm, to realize automatically, accurately and quickly identify the external input connection type of the different photovoltaic strings under the external condition changes. The proposed method is free from increasing the inverter hardware cost, and it enhances the capability of identification and judgment. Moreover, experiments and engineering applications are implemented to verify the proposed control method.

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Section: Distributed Pv Power Generation Systems and Input String Typesmentioning

confidence: 99%

Research on Advanced Control Method of Multiple Photovoltaic Strings Input Type Recognition

Wang

Zhang

Zhang³

et al. 2022

Front. Energy Res.

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“…The decoupled MPPT approach has been used for the MIPBS in which both PV module MPPTs are working in parallel using a single microcontroler. 14 The flowchart of the decoupled MPPT approach is presented in Figure 10.…”

Section: Controller Designmentioning

confidence: 99%

“…The MIPBS uses the direct voltage approach to achieve MPPT using perturb and observe technique 4 at the PV input ports, which are generating the duty ratio

D_{11}

and

D_{12}

and driving the switches

S_{11}

and

S_{12}

. The decoupled MPPT approach has been used for the MIPBS in which both PV module MPPTs are working in parallel using a single microcontroler 14 . The flowchart of the decoupled MPPT approach is presented in Figure 10.…”

Section: Dynamic Analysismentioning

confidence: 99%

“…11 Different power electronics circuit topologies have been developed for solving these problems. 12 The topologies used in solar PV systems are categorized based on the connection of PV modules and power electronics structure, such as centralized, string or multistring, module integrated, 13 multi-input converters, 14 and multilevel converters. 15 Conventional topologies like centralized, string, or multistring have various limitations, including the fact that each PV module may not operate its maximum power point (MPP), and losses due to power mismatch are inevitable.…”

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confidence: 99%

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Multi‐input battery‐integrated single‐stage DC‐DC converter for reliable operation of solar photovoltaic‐based systems

Bodele

Kulkarni

2022

Circuit Theory & Apps

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Summary Solar photovoltaic (PV) systems are emerging progressively due to their wide compatibility range, ease of installation, and environmental friendliness. The module mismatch (MM) losses and module open circuit (MOC) fault can cause the power mismatch between different PV modules. This significantly affects the energy output from the PV module. Also, the intermittent nature of solar PV power makes the solar PV systems unreliable; to compensate for this, conventional PV systems utilize a battery storage system (BSS) with separate bidirectional converter. These bidirectional converters require two‐stage power conversion and massive battery bank connected at the DC link. This leads to the further reduction in overall efficiency. To address these issues, this paper proposed a multi‐input PV battery system (MIPBS) that uses nonisolated buck and boost converter combinations. It requires single‐stage power conversion to extract maximum power from each PV module along with BSS charging and discharging. Its modular design allows it to function across a wide range of voltage, power, and BSS choices. The proposed system is capable of mitigating the MM loss and sustaining the MOC fault. This paper discusses the operation, steady‐state analysis, and dynamic analysis of the proposed MIPBS. The performance of the proposed MIPBS is validated using a state‐of‐the‐art experimental setup with two PV modules, each having a rating of 60.53 W.

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Modular battery-integrated bidirectional single-stage DC–DC converter for solar PV based DC Nano-grid application

Bodele

Kulkarni

2023

Solar Energy

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A multi-input hybrid converter for small off-grid solar photo-voltaic system

Cited by 5 publications

References 17 publications

Research on Advanced Control Method of Multiple Photovoltaic Strings Input Type Recognition

Research on Advanced Control Method of Multiple Photovoltaic Strings Input Type Recognition

Multi‐input battery‐integrated single‐stage DC‐DC converter for reliable operation of solar photovoltaic‐based systems

Modular battery-integrated bidirectional single-stage DC–DC converter for solar PV based DC Nano-grid application

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