Centralized Control Topology for PV Farms Shading Detection and GMPP Searching Restarting Condition
The power output of the solar panels follows a power-voltage (P-V) characteristic containing only one Global Maximum Point (GMP) in the normal conditions. However, under Partial Shading Conditions (PSC), the unbalanced irradiance in the panels creates Local Maximum Points (LMP) in the P-V curve. Sta...
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| Format: | Article |
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9732999/ |
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| author | Cesar A. Negri Saeed Daneshvardehnavi Konrad Erich Kork Schmitt Ali Esmaeel Nezhad Pedro H. J. Nardelli Stephen Bayne Michael G. Giesselmann |
| author_facet | Cesar A. Negri Saeed Daneshvardehnavi Konrad Erich Kork Schmitt Ali Esmaeel Nezhad Pedro H. J. Nardelli Stephen Bayne Michael G. Giesselmann |
| author_sort | Cesar A. Negri |
| collection | DOAJ |
| description | The power output of the solar panels follows a power-voltage (P-V) characteristic containing only one Global Maximum Point (GMP) in the normal conditions. However, under Partial Shading Conditions (PSC), the unbalanced irradiance in the panels creates Local Maximum Points (LMP) in the P-V curve. Standard control techniques for Maximum Power Point Tracking (MPPT) can not properly locate the GMP, stagnating in LMPs and generating losses in the energy harvesting. Specific techniques to locate the GMP are presented in the literature. However, the condition to restart the GMP is not widely discussed. The main challenges of global search algorithms are related to the restarting conditions. Avoiding unnecessary searching and providing an assertive GMP restarting condition is crucial for PV systems operation. In every GMP search, the solar inverters oscillate the power exchanged with the grid, causing frequency and voltage variations depending on the size of the PV plant. This paper proposes a novel technique that uses a centralized controller to identify the shaded inverters, creating flags that locally start the GMP searching. The solution minimizes the number of times the search is performed by providing an assertive GMP restarting condition, saving energy, and avoiding unnecessary output power oscillation. The proposed control technique was evaluated using the data of a real 150-kW solar farm containing five inverters with two MPPT trackers each. |
| first_indexed | 2024-12-14T18:45:23Z |
| format | Article |
| id | doaj.art-f5ecc48116eb41faab02d721261d6945 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T18:45:23Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-f5ecc48116eb41faab02d721261d69452022-12-21T22:51:24ZengIEEEIEEE Access2169-35362022-01-0110289912900810.1109/ACCESS.2022.31587399732999Centralized Control Topology for PV Farms Shading Detection and GMPP Searching Restarting ConditionCesar A. Negri0https://orcid.org/0000-0003-4535-0154Saeed Daneshvardehnavi1https://orcid.org/0000-0003-0361-6858Konrad Erich Kork Schmitt2Ali Esmaeel Nezhad3https://orcid.org/0000-0002-6522-4043Pedro H. J. Nardelli4https://orcid.org/0000-0002-7398-1802Stephen Bayne5https://orcid.org/0000-0002-7789-1820Michael G. Giesselmann6https://orcid.org/0000-0002-4975-3607Wind and Science Engineering Department, Texas Tech University, Lubbock, TX, USAElectrical and Computer Engineering Department, Texas Tech University, Lubbock, TX, USAElectrical and Computer Engineering Department, Texas Tech University, Lubbock, TX, USADepartment of Electrical Engineering, School of Energy Systems, LUT University, Lappeenranta, FinlandDepartment of Electrical Engineering, School of Energy Systems, LUT University, Lappeenranta, FinlandElectrical and Computer Engineering Department, Texas Tech University, Lubbock, TX, USAElectrical and Computer Engineering Department, Texas Tech University, Lubbock, TX, USAThe power output of the solar panels follows a power-voltage (P-V) characteristic containing only one Global Maximum Point (GMP) in the normal conditions. However, under Partial Shading Conditions (PSC), the unbalanced irradiance in the panels creates Local Maximum Points (LMP) in the P-V curve. Standard control techniques for Maximum Power Point Tracking (MPPT) can not properly locate the GMP, stagnating in LMPs and generating losses in the energy harvesting. Specific techniques to locate the GMP are presented in the literature. However, the condition to restart the GMP is not widely discussed. The main challenges of global search algorithms are related to the restarting conditions. Avoiding unnecessary searching and providing an assertive GMP restarting condition is crucial for PV systems operation. In every GMP search, the solar inverters oscillate the power exchanged with the grid, causing frequency and voltage variations depending on the size of the PV plant. This paper proposes a novel technique that uses a centralized controller to identify the shaded inverters, creating flags that locally start the GMP searching. The solution minimizes the number of times the search is performed by providing an assertive GMP restarting condition, saving energy, and avoiding unnecessary output power oscillation. The proposed control technique was evaluated using the data of a real 150-kW solar farm containing five inverters with two MPPT trackers each.https://ieeexplore.ieee.org/document/9732999/Solar power generationpartial shadingmaximum power point trackersglobal searchingcentral controllerSCADA |
| spellingShingle | Cesar A. Negri Saeed Daneshvardehnavi Konrad Erich Kork Schmitt Ali Esmaeel Nezhad Pedro H. J. Nardelli Stephen Bayne Michael G. Giesselmann Centralized Control Topology for PV Farms Shading Detection and GMPP Searching Restarting Condition IEEE Access Solar power generation partial shading maximum power point trackers global searching central controller SCADA |
| title | Centralized Control Topology for PV Farms Shading Detection and GMPP Searching Restarting Condition |
| title_full | Centralized Control Topology for PV Farms Shading Detection and GMPP Searching Restarting Condition |
| title_fullStr | Centralized Control Topology for PV Farms Shading Detection and GMPP Searching Restarting Condition |
| title_full_unstemmed | Centralized Control Topology for PV Farms Shading Detection and GMPP Searching Restarting Condition |
| title_short | Centralized Control Topology for PV Farms Shading Detection and GMPP Searching Restarting Condition |
| title_sort | centralized control topology for pv farms shading detection and gmpp searching restarting condition |
| topic | Solar power generation partial shading maximum power point trackers global searching central controller SCADA |
| url | https://ieeexplore.ieee.org/document/9732999/ |
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