Photovoltaic Electricity for Sustainable Building. Efficiency and Energy Cost Reduction for Isolated DC Microgrid

Energies

Manuela Sechilariu²  Fabrice Locment²  Baochao Wang¹ 

[1] Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China; E-Mail:;Sorbonne University, Université de Technologie de Compiègne, EA 7284 AVENUES, Centre Pierre Guillaumat CS 60319, Compiègne Cedex 60203, France; E-Mail:

关键词: DC microgrid;    forecast data;    efficiency;    cost optimization;    photovoltaic;    system integration;    storage;   

DOI  :  10.3390/en8087945

来源: mdpi

【 摘 要 】

In the context of sustainable buildings, this paper investigates power flow management for an isolated DC microgrid and focuses on efficiency and energy cost reduction by optimal scheduling. Aiming at high efficiency, the local produced power has to be used where, when, and how it is generated. Thus, based on photovoltaic sources, storage, and a biofuel generator, the proposed DC microgrid is coupled with the DC distribution network of the building. The DC bus distribution maximizes the efficiency of the overall production-consumption system by avoiding some energy conversion losses and absence of reactive power. The isolated DC microgrid aims to minimize the total energy cost and thus, based on forecasting data, a cost function is formulated. Using a mixed integer linear programming optimization, the optimal power flow scheduling is obtained which leads to an optimization-based strategy for real-time power balancing. Three experimental tests, operated under different meteorological conditions, validate the feasibility of the proposed control and demonstrate the problem formulation of minimizing total energy cost.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.