Open AccessResearch on fault ride-through control strategy for DC microgrid with high-proportion renewable generation
Author(s) -
Wanyu Ji,
Dong Wei,
Junjun Zhang,
Meiyin Liu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/675/1/012087
Subject(s) - microgrid , voltage droop , renewable energy , fault (geology) , engineering , control theory (sociology) , battery (electricity) , voltage , energy storage , computer science , automotive engineering , control engineering , electrical engineering , control (management) , power (physics) , voltage source , artificial intelligence , seismology , geology , physics , quantum mechanics
DC microgrids with high-proportion renewable generation have been popular in the new era of the energy revolution. To improve the fault ride-through capability of DC microgrid, a fault ride-through scheme based on battery storage is proposed. A feed-forward term based on a nonlinear disturbance observer is introduced, and a fault ride-through control strategy based on battery storage under the improved droop control is designed for DC microgrid, which can effectively suppress the DC voltage fluctuations, shorten the voltage recovery time, thereby realizing the fault ride-through of DC microgrid under short-circuit fault in the DC branch. Finally, a model of DC microgrid with high-proportion renewable generation is established in Simulink, and simulation results verify the proposed scheme and the designed fault ride-through control strategy.