A Low-Voltage DC Backbone with Aggregated RES and BESS: Benefits Compared to a Traditional Low-Voltage AC System
The increasing penetration of PV into the distribution grid leads to congestion, causing detrimental power quality issues. Moreover, the multiple small photovoltaic (PV) systems and battery energy storage systems (BESSs) result in increasing conversion losses. A low-voltage DC (LVDC) backbone to int...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-03-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/14/5/1420 |
| _version_ | 1797414186250141696 |
|---|---|
| author | Hakim Azaioud Robbert Claeys Jos Knockaert Lieven Vandevelde Jan Desmet |
| author_facet | Hakim Azaioud Robbert Claeys Jos Knockaert Lieven Vandevelde Jan Desmet |
| author_sort | Hakim Azaioud |
| collection | DOAJ |
| description | The increasing penetration of PV into the distribution grid leads to congestion, causing detrimental power quality issues. Moreover, the multiple small photovoltaic (PV) systems and battery energy storage systems (BESSs) result in increasing conversion losses. A low-voltage DC (LVDC) backbone to interconnect these assets would decrease the conversion losses and is a promising solution for a more optimal integration of PV systems. The multiple small PV systems can be replaced by shared assets with large common PV installations and a large BESS. Sharing renewable energy and aggregation are activities that are stimulated by the European Commission and lead to a substantial benefit in terms of self-consumption index (SCI) and self-sufficiency index (SSI). In this study, the benefit of an LVDC backbone is investigated compared to using a low-voltage AC (LVAC) system. It is found that the cable losses increase by 0.9 percent points and the conversion losses decrease by 12 percent points compared to the traditional low-voltage AC (LVAC) system. The SCI increases by 2 percent points and the SSI increases by 6 percent points compared to using an LVAC system with shared meter. It is shown that an LVDC backbone is only beneficial with a PV penetration level of 65% and that the BESS can be reduced by 22% for the same SSI. |
| first_indexed | 2024-03-09T05:29:25Z |
| format | Article |
| id | doaj.art-915f70c826a64061873c8f3cfbf68bf5 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T05:29:25Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-915f70c826a64061873c8f3cfbf68bf52023-12-03T12:34:23ZengMDPI AGEnergies1996-10732021-03-01145142010.3390/en14051420A Low-Voltage DC Backbone with Aggregated RES and BESS: Benefits Compared to a Traditional Low-Voltage AC SystemHakim Azaioud0Robbert Claeys1Jos Knockaert2Lieven Vandevelde3Jan Desmet4EELab/Lemcko, Department of Electromechanical, Systems and Metal Engineering, Ghent University, 8500 Kortrijk, BelgiumEELab/Lemcko, Department of Electromechanical, Systems and Metal Engineering, Ghent University, 8500 Kortrijk, BelgiumEELab/Lemcko, Department of Electromechanical, Systems and Metal Engineering, Ghent University, 8500 Kortrijk, BelgiumEELab, Department of Electromechanical, Systems and Metal Engineering, Ghent University, 9052 Ghent, BelgiumEELab/Lemcko, Department of Electromechanical, Systems and Metal Engineering, Ghent University, 8500 Kortrijk, BelgiumThe increasing penetration of PV into the distribution grid leads to congestion, causing detrimental power quality issues. Moreover, the multiple small photovoltaic (PV) systems and battery energy storage systems (BESSs) result in increasing conversion losses. A low-voltage DC (LVDC) backbone to interconnect these assets would decrease the conversion losses and is a promising solution for a more optimal integration of PV systems. The multiple small PV systems can be replaced by shared assets with large common PV installations and a large BESS. Sharing renewable energy and aggregation are activities that are stimulated by the European Commission and lead to a substantial benefit in terms of self-consumption index (SCI) and self-sufficiency index (SSI). In this study, the benefit of an LVDC backbone is investigated compared to using a low-voltage AC (LVAC) system. It is found that the cable losses increase by 0.9 percent points and the conversion losses decrease by 12 percent points compared to the traditional low-voltage AC (LVAC) system. The SCI increases by 2 percent points and the SSI increases by 6 percent points compared to using an LVAC system with shared meter. It is shown that an LVDC backbone is only beneficial with a PV penetration level of 65% and that the BESS can be reduced by 22% for the same SSI.https://www.mdpi.com/1996-1073/14/5/1420LVDCself-sufficiency indexload aggregationpower convertersphotovoltaicefficiency |
| spellingShingle | Hakim Azaioud Robbert Claeys Jos Knockaert Lieven Vandevelde Jan Desmet A Low-Voltage DC Backbone with Aggregated RES and BESS: Benefits Compared to a Traditional Low-Voltage AC System Energies LVDC self-sufficiency index load aggregation power converters photovoltaic efficiency |
| title | A Low-Voltage DC Backbone with Aggregated RES and BESS: Benefits Compared to a Traditional Low-Voltage AC System |
| title_full | A Low-Voltage DC Backbone with Aggregated RES and BESS: Benefits Compared to a Traditional Low-Voltage AC System |
| title_fullStr | A Low-Voltage DC Backbone with Aggregated RES and BESS: Benefits Compared to a Traditional Low-Voltage AC System |
| title_full_unstemmed | A Low-Voltage DC Backbone with Aggregated RES and BESS: Benefits Compared to a Traditional Low-Voltage AC System |
| title_short | A Low-Voltage DC Backbone with Aggregated RES and BESS: Benefits Compared to a Traditional Low-Voltage AC System |
| title_sort | low voltage dc backbone with aggregated res and bess benefits compared to a traditional low voltage ac system |
| topic | LVDC self-sufficiency index load aggregation power converters photovoltaic efficiency |
| url | https://www.mdpi.com/1996-1073/14/5/1420 |
| work_keys_str_mv | AT hakimazaioud alowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT robbertclaeys alowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT josknockaert alowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT lievenvandevelde alowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT jandesmet alowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT hakimazaioud lowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT robbertclaeys lowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT josknockaert lowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT lievenvandevelde lowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem AT jandesmet lowvoltagedcbackbonewithaggregatedresandbessbenefitscomparedtoatraditionallowvoltageacsystem |