A Scalable Control Strategy for CHB Converters in Photovoltaic Applications
Renewable energy sources are becoming more relevant in recent decades in power generation, leading to investment in developing efficient systems. Specifically, in photovoltaic energy, modular converters are attracting interest since their characteristics enable them to work at high voltage and optim...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/1/208 |
| _version_ | 1797499149838450688 |
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| author | Álvaro Pérez Mayo Ainhoa Galarza Asier López Barriuso Javier Vadillo |
| author_facet | Álvaro Pérez Mayo Ainhoa Galarza Asier López Barriuso Javier Vadillo |
| author_sort | Álvaro Pérez Mayo |
| collection | DOAJ |
| description | Renewable energy sources are becoming more relevant in recent decades in power generation, leading to investment in developing efficient systems. Specifically, in photovoltaic energy, modular converters are attracting interest since their characteristics enable them to work at high voltage and optimize the generated energy. However, the control strategies found the literature limit the scalability potential of modular converters. The main aim of this paper is to propose a scalable control strategy for a grid-tied CHB (Cascaded H-Bridge) converter for large-scale photovoltaic power plants. The control proposed is able to take full advantage of converter scalability and modularity, being based on the parameters needed for bipolar sinusoidal PWM (Pulse Width Modulation), and thus reducing the calculus required and simplifying its implementation. Power imbalances are overcome including the zero-sequence vector injection to allow power exchange between phases. Furthermore, the parameter used for power factor control has been discretized and discretization time analysis shows that the control strategy is stable and does not require a high-speed communication channel. For validation purposes, simulations are conducted on a downsized 12 H-bridge model. |
| first_indexed | 2024-03-10T03:43:19Z |
| format | Article |
| id | doaj.art-41ed2130fc7f4577870f937a2aa90c9d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T03:43:19Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-41ed2130fc7f4577870f937a2aa90c9d2023-11-23T11:27:14ZengMDPI AGEnergies1996-10732021-12-0115120810.3390/en15010208A Scalable Control Strategy for CHB Converters in Photovoltaic ApplicationsÁlvaro Pérez Mayo0Ainhoa Galarza1Asier López Barriuso2Javier Vadillo3Electric Vehicle and Smart Grids Team, Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (C.E.I.T.)-Basque Research and Technology Alliance (BRTA), 20009 Donostia-San Sebastián, SpainElectric Vehicle and Smart Grids Team, Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (C.E.I.T.)-Basque Research and Technology Alliance (BRTA), 20009 Donostia-San Sebastián, SpainElectric Vehicle and Smart Grids Team, Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (C.E.I.T.)-Basque Research and Technology Alliance (BRTA), 20009 Donostia-San Sebastián, SpainElectric Vehicle and Smart Grids Team, Centro de Estudios e Investigaciones Técnicas de Gipuzkoa (C.E.I.T.)-Basque Research and Technology Alliance (BRTA), 20009 Donostia-San Sebastián, SpainRenewable energy sources are becoming more relevant in recent decades in power generation, leading to investment in developing efficient systems. Specifically, in photovoltaic energy, modular converters are attracting interest since their characteristics enable them to work at high voltage and optimize the generated energy. However, the control strategies found the literature limit the scalability potential of modular converters. The main aim of this paper is to propose a scalable control strategy for a grid-tied CHB (Cascaded H-Bridge) converter for large-scale photovoltaic power plants. The control proposed is able to take full advantage of converter scalability and modularity, being based on the parameters needed for bipolar sinusoidal PWM (Pulse Width Modulation), and thus reducing the calculus required and simplifying its implementation. Power imbalances are overcome including the zero-sequence vector injection to allow power exchange between phases. Furthermore, the parameter used for power factor control has been discretized and discretization time analysis shows that the control strategy is stable and does not require a high-speed communication channel. For validation purposes, simulations are conducted on a downsized 12 H-bridge model.https://www.mdpi.com/1996-1073/15/1/208scalable controlCascaded H-Bridge (CHB)photovoltaic plants |
| spellingShingle | Álvaro Pérez Mayo Ainhoa Galarza Asier López Barriuso Javier Vadillo A Scalable Control Strategy for CHB Converters in Photovoltaic Applications Energies scalable control Cascaded H-Bridge (CHB) photovoltaic plants |
| title | A Scalable Control Strategy for CHB Converters in Photovoltaic Applications |
| title_full | A Scalable Control Strategy for CHB Converters in Photovoltaic Applications |
| title_fullStr | A Scalable Control Strategy for CHB Converters in Photovoltaic Applications |
| title_full_unstemmed | A Scalable Control Strategy for CHB Converters in Photovoltaic Applications |
| title_short | A Scalable Control Strategy for CHB Converters in Photovoltaic Applications |
| title_sort | scalable control strategy for chb converters in photovoltaic applications |
| topic | scalable control Cascaded H-Bridge (CHB) photovoltaic plants |
| url | https://www.mdpi.com/1996-1073/15/1/208 |
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