An adaptive control scheme for flexible power point tracking in photovoltaic systems
One of the major concerns associated with the increasing penetration of grid-connected photovoltaic (PV) power plants is the operational challenges (e.g., overloading and overvoltage), imposed due to the variability of PV power generation. A flexible power point tracking (FPPT), which can limit the...
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| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/88878 http://hdl.handle.net/10220/46007 https://ieeexplore-ieee-org.ezlibproxy1.ntu.edu.sg/document/8457276/ |
| _version_ | 1826112210890391552 |
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| author | Dehghani Tafti, Hossein Sangwongwanich, Ariya Yang, Yongheng Pou, Josep Konstantinou, Georgios Blaabjerg, Frede |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Dehghani Tafti, Hossein Sangwongwanich, Ariya Yang, Yongheng Pou, Josep Konstantinou, Georgios Blaabjerg, Frede |
| author_sort | Dehghani Tafti, Hossein |
| collection | NTU |
| description | One of the major concerns associated with the increasing penetration of grid-connected photovoltaic (PV) power plants is the operational challenges (e.g., overloading and overvoltage), imposed due to the variability of PV power generation. A flexible power point tracking (FPPT), which can limit the PV output power to a specific value, has thus been defined in grid-connection regulations to tackle some of the integration challenging issues. However, the conventional FPPT algorithm based on the perturb and observe method suffers from slow dynamics. In this paper, an adaptive FPPT algorithm is thus proposed, which features fast dynamics under rapidly changing environmental conditions (e.g., due to passing clouds), while maintaining low power oscillations in steady-state. The proposed algorithm employs an extra measured sampling at each perturbation to observe the change in the operating condition (e.g., solar irradiance). Afterwards, the voltage-step is adaptively calculated following the observed condition (e.g., transient or steady-state) in a way to improve the tracking performance. Experimental results on a 3-kVA grid-connected single-phase PV system validate the effectiveness of the proposed algorithm in terms of fast dynamics and high accuracy under various operational conditions. |
| first_indexed | 2024-10-01T03:03:16Z |
| format | Journal Article |
| id | ntu-10356/88878 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:03:16Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/888782020-03-07T13:57:22Z An adaptive control scheme for flexible power point tracking in photovoltaic systems Dehghani Tafti, Hossein Sangwongwanich, Ariya Yang, Yongheng Pou, Josep Konstantinou, Georgios Blaabjerg, Frede School of Electrical and Electronic Engineering Adaptive Voltage-Step Calculation Constant Power Generation DRNTU::Engineering::Electrical and electronic engineering::Power electronics One of the major concerns associated with the increasing penetration of grid-connected photovoltaic (PV) power plants is the operational challenges (e.g., overloading and overvoltage), imposed due to the variability of PV power generation. A flexible power point tracking (FPPT), which can limit the PV output power to a specific value, has thus been defined in grid-connection regulations to tackle some of the integration challenging issues. However, the conventional FPPT algorithm based on the perturb and observe method suffers from slow dynamics. In this paper, an adaptive FPPT algorithm is thus proposed, which features fast dynamics under rapidly changing environmental conditions (e.g., due to passing clouds), while maintaining low power oscillations in steady-state. The proposed algorithm employs an extra measured sampling at each perturbation to observe the change in the operating condition (e.g., solar irradiance). Afterwards, the voltage-step is adaptively calculated following the observed condition (e.g., transient or steady-state) in a way to improve the tracking performance. Experimental results on a 3-kVA grid-connected single-phase PV system validate the effectiveness of the proposed algorithm in terms of fast dynamics and high accuracy under various operational conditions. Accepted version 2018-09-13T09:16:59Z 2019-12-06T17:12:56Z 2018-09-13T09:16:59Z 2019-12-06T17:12:56Z 2018 Journal Article Dehghani Tafti, H., Sangwongwanich, A., Yang, Y., Pou, J., Konstantinou, G., & Blaabjerg, F. (2018). An adaptive control scheme for flexible power point tracking in photovoltaic systems. IEEE Transactions on Power Electronics, In press. doi:10.1109/TPEL.2018.2869172 0885-8993 https://hdl.handle.net/10356/88878 http://hdl.handle.net/10220/46007 10.1109/TPEL.2018.2869172 https://ieeexplore-ieee-org.ezlibproxy1.ntu.edu.sg/document/8457276/ en IEEE Transactions on Power Electronics © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [http://dx.doi.org/10.1109/TPEL.2018.2869172]. 22 p. application/pdf |
| spellingShingle | Adaptive Voltage-Step Calculation Constant Power Generation DRNTU::Engineering::Electrical and electronic engineering::Power electronics Dehghani Tafti, Hossein Sangwongwanich, Ariya Yang, Yongheng Pou, Josep Konstantinou, Georgios Blaabjerg, Frede An adaptive control scheme for flexible power point tracking in photovoltaic systems |
| title | An adaptive control scheme for flexible power point tracking in photovoltaic systems |
| title_full | An adaptive control scheme for flexible power point tracking in photovoltaic systems |
| title_fullStr | An adaptive control scheme for flexible power point tracking in photovoltaic systems |
| title_full_unstemmed | An adaptive control scheme for flexible power point tracking in photovoltaic systems |
| title_short | An adaptive control scheme for flexible power point tracking in photovoltaic systems |
| title_sort | adaptive control scheme for flexible power point tracking in photovoltaic systems |
| topic | Adaptive Voltage-Step Calculation Constant Power Generation DRNTU::Engineering::Electrical and electronic engineering::Power electronics |
| url | https://hdl.handle.net/10356/88878 http://hdl.handle.net/10220/46007 https://ieeexplore-ieee-org.ezlibproxy1.ntu.edu.sg/document/8457276/ |
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