Energy Efficiency Performances of LVDC Nanogrids Powered Buildings

The Low Voltage Direct Current (LVDC) system concept has been growing in the recent times due to its characteristics and advantages like renewable energy source compatibility, more straightforward integration with storage utilities through power electronic converters, and distributed loads. This paper presents the energy efficiency performances of a proposed LVDC supply concept and other classical PV chains architectures. A PV source was considered in the studied nanogrids. The notion of relative saved energy (RSE) was introduced to compare the studied PV systems energy performances. The obtained results revealed that the use of the proposed LVDC chain supply concept increases the nanogrid efficiency. The installed PV power source in the building should be well sized regarding the consumed power in order to register a high system RSE. The efficiency of the new LVDC architecture is 10% higher than the conventional LVDC one.

[1]  Susan Lynn Beckwith,et al.  DC , 2019, Springer Reference Medizin.

[2]  U. Boeke,et al.  Energy efficient low-voltage DC-grids for commercial buildings , 2015, 2015 IEEE First International Conference on DC Microgrids (ICDCM).

[3]  Hervé Morel,et al.  LVDC: An Efficient Energy Solution for On-Grid Photovoltaic Applications , 2014 .

[4]  Bill Rose,et al.  Microgrids , 2018, Smart Grids.

[5]  Kenji Tanaka,et al.  Conceptual Study for Open Energy Systems: Distributed Energy Network Using Interconnected DC Nanogrids , 2015, IEEE Transactions on Smart Grid.

[6]  Enrique Rodriguez-Diaz,et al.  Voltage-Level Selection of Future Two-Level LVdc Distribution Grids: A Compromise Between Grid Compatibiliy, Safety, and Efficiency , 2016, IEEE Electrification Magazine.

[7]  Arindam Ghosh,et al.  DC Microgrid Technology: System Architectures, AC Grid Interfaces, Grounding Schemes, Power Quality, Communication Networks, Applications, and Standardizations Aspects , 2017, IEEE Access.

[8]  B. T. Patterson,et al.  DC, Come Home: DC Microgrids and the Birth of the "Enernet" , 2012, IEEE Power and Energy Magazine.

[9]  Hamed Yahoui,et al.  A Control Strategy of DC Building Microgrid Connected to the Neighborhood and AC Power Network , 2017 .

[10]  G. Yoon,et al.  Energy Efficiency and Cost Performance of Direct-Current Power Supply Systems in Residential Buildings by 2030s and 2050s , 2019, E3S Web of Conferences.

[11]  G. AlLee,et al.  Edison Redux: 380 Vdc Brings Reliability and Efficiency to Sustainable Data Centers , 2012, IEEE Power and Energy Magazine.

[12]  Vagelis Vossos,et al.  Energy savings from direct-DC in U.S. residential buildings , 2014 .

[13]  Tero Kaipia,et al.  An LVDC distribution system concept , 2008 .

[14]  Fabrice Locment,et al.  Optimized Load Shedding Approach for Grid-Connected DC Microgrid Systems under Realistic Constraints , 2016 .

[15]  Du,et al.  Insulation Monitoring Method for DC Systems with Ground Capacitance in Electric Vehicles , 2019, Applied Sciences.

[16]  Osama A. Mohammed,et al.  DC microgrids and distribution systems: An overview , 2013, 2013 IEEE Power & Energy Society General Meeting.