Low-Voltage Photovoltaic System Based on a Continuous Input/Output Current Converter
Low-voltage photovoltaic systems are being widely used around the world, including their introduction into the power grid. The development of these systems requires the adaptation of several power converters, their static and dynamic modeling, the design of passive elements, and the design of the co...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Computation |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-3197/11/2/42 |
| _version_ | 1797621677318733824 |
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| author | Carlos Andres Ramos-Paja Juan David Bastidas-Rodriguez Andres Julian Saavedra-Montes |
| author_facet | Carlos Andres Ramos-Paja Juan David Bastidas-Rodriguez Andres Julian Saavedra-Montes |
| author_sort | Carlos Andres Ramos-Paja |
| collection | DOAJ |
| description | Low-voltage photovoltaic systems are being widely used around the world, including their introduction into the power grid. The development of these systems requires the adaptation of several power converters, their static and dynamic modeling, the design of passive elements, and the design of the controller parameters, among other actions. Today, power converters are key elements in the development of photovoltaic systems, and classical power converters such as buck converters produce discontinuous input and output currents, requiring a high input capacitance and impacting the output power quality of these systems. This paper presents a proposal for a low-voltage photovoltaic system that uses a continuous input/output current buck converter, which enhances the operation of the classical buck converter in photovoltaic systems. The methodology describes the proposed photovoltaic system, including the power converter, its detailed operation, and the analysis of its waveforms. Moreover, the methodology includes a mathematical model of the photovoltaic system’s dynamic behavior and the design of a sliding-mode controller for maximum power extraction and perturbation rejection. The photovoltaic system is validated in two ways: first, a comparison with the classical buck converter highlighting the advantages of continuous input/output currents is presented; then, an application example using commercial devices is described in detail. The application example uses a flowchart to design the power converter and the sliding-mode controller, and a circuit simulation confirms the advantages of the continuous input/output current buck converter with its controller. In the circuit simulation, the control strategy is formed by a perturb and observe algorithm that generates the voltage reference for the sliding-mode controller, which guarantees the system stability, tracks the maximum power point, and rejects the double-frequency oscillations generated by an intended microinverter. |
| first_indexed | 2024-03-11T08:59:21Z |
| format | Article |
| id | doaj.art-d6009c1521344321a33125f868ea57f6 |
| institution | Directory Open Access Journal |
| issn | 2079-3197 |
| language | English |
| last_indexed | 2024-03-11T08:59:21Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Computation |
| spelling | doaj.art-d6009c1521344321a33125f868ea57f62023-11-16T19:53:04ZengMDPI AGComputation2079-31972023-02-011124210.3390/computation11020042Low-Voltage Photovoltaic System Based on a Continuous Input/Output Current ConverterCarlos Andres Ramos-Paja0Juan David Bastidas-Rodriguez1Andres Julian Saavedra-Montes2Facultad de Minas, Universidad Nacional de Colombia, Medellin 050041, ColombiaFacultad de Ingeniería y Arquitectura, Universidad Nacional de Colombia, Manizales 170003, ColombiaFacultad de Minas, Universidad Nacional de Colombia, Medellin 050041, ColombiaLow-voltage photovoltaic systems are being widely used around the world, including their introduction into the power grid. The development of these systems requires the adaptation of several power converters, their static and dynamic modeling, the design of passive elements, and the design of the controller parameters, among other actions. Today, power converters are key elements in the development of photovoltaic systems, and classical power converters such as buck converters produce discontinuous input and output currents, requiring a high input capacitance and impacting the output power quality of these systems. This paper presents a proposal for a low-voltage photovoltaic system that uses a continuous input/output current buck converter, which enhances the operation of the classical buck converter in photovoltaic systems. The methodology describes the proposed photovoltaic system, including the power converter, its detailed operation, and the analysis of its waveforms. Moreover, the methodology includes a mathematical model of the photovoltaic system’s dynamic behavior and the design of a sliding-mode controller for maximum power extraction and perturbation rejection. The photovoltaic system is validated in two ways: first, a comparison with the classical buck converter highlighting the advantages of continuous input/output currents is presented; then, an application example using commercial devices is described in detail. The application example uses a flowchart to design the power converter and the sliding-mode controller, and a circuit simulation confirms the advantages of the continuous input/output current buck converter with its controller. In the circuit simulation, the control strategy is formed by a perturb and observe algorithm that generates the voltage reference for the sliding-mode controller, which guarantees the system stability, tracks the maximum power point, and rejects the double-frequency oscillations generated by an intended microinverter.https://www.mdpi.com/2079-3197/11/2/42continuous currentimproved reliabilitymicroinverternon-electrolytic capacitorpower convertersliding-mode controller |
| spellingShingle | Carlos Andres Ramos-Paja Juan David Bastidas-Rodriguez Andres Julian Saavedra-Montes Low-Voltage Photovoltaic System Based on a Continuous Input/Output Current Converter Computation continuous current improved reliability microinverter non-electrolytic capacitor power converter sliding-mode controller |
| title | Low-Voltage Photovoltaic System Based on a Continuous Input/Output Current Converter |
| title_full | Low-Voltage Photovoltaic System Based on a Continuous Input/Output Current Converter |
| title_fullStr | Low-Voltage Photovoltaic System Based on a Continuous Input/Output Current Converter |
| title_full_unstemmed | Low-Voltage Photovoltaic System Based on a Continuous Input/Output Current Converter |
| title_short | Low-Voltage Photovoltaic System Based on a Continuous Input/Output Current Converter |
| title_sort | low voltage photovoltaic system based on a continuous input output current converter |
| topic | continuous current improved reliability microinverter non-electrolytic capacitor power converter sliding-mode controller |
| url | https://www.mdpi.com/2079-3197/11/2/42 |
| work_keys_str_mv | AT carlosandresramospaja lowvoltagephotovoltaicsystembasedonacontinuousinputoutputcurrentconverter AT juandavidbastidasrodriguez lowvoltagephotovoltaicsystembasedonacontinuousinputoutputcurrentconverter AT andresjuliansaavedramontes lowvoltagephotovoltaicsystembasedonacontinuousinputoutputcurrentconverter |