Open AccessA Comparison of Energy Efficiency in AC and DC Microgrid with New Energy
Author(s) -
HuipengLi,
Shengwen Li,
Tan Wang,
Xu Wang,
Changyan Xiao,
Min Zhang,
Runquan Meng
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/619/1/012057
Subject(s) - microgrid , distributed generation , energy storage , power (physics) , photovoltaic system , electrical engineering , computer science , renewable energy , engineering , physics , quantum mechanics
As photovoltaic, wind power and other new energy sources are connected to the power grid on a large scale, the research on key technologies of microgrid needs to be further improved. Since most distributed generation and energy storage devices are mostly powered by direct current, DC distribution technology has got more and more attention. Aiming at the difference of energy efficiency between AC and DC microgrid, this paper proposes the analysis method of “the efficiency of source side with distributed generation”, establishes a mathematical model of system loss of AC and DC microgrid with distributed generation and sets up a selection principle of distribution system mode through the intersection point of system loss rate, from the perspective of energy efficiency. The calculation results show that the loss rate of DC microgrid with distributed power source is lower than that of AC microgrid supposing the DC load ratio is 50%. The system loss rate curve confirms the necessity of DC distribution system technology research. With the continuous access of distributed generation and energy storage devices to microgrids, and the increasing improvement of DC load rate, the DC microgrid with distributed generation will have more advantages in the future.