Open AccessSmall Signal Stability Analysis of Microgrid with Multiple Parallel Inverters
Author(s) -
Yi Han,
Zhongmin Qian,
Danlu Shao,
Qiujia Lin,
Shuangrui Yin,
Minyu Chen,
Qian Ai
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 - 10.1088/1755-1315/687/1/012112
Subject(s) - voltage droop , microgrid , inverter , control theory (sociology) , controller (irrigation) , ac power , small signal model , distributed generation , feed forward , engineering , dual loop , voltage , computer science , renewable energy , loop (graph theory) , voltage source , control engineering , control (management) , electrical engineering , mathematics , agronomy , combinatorics , artificial intelligence , biology
Microgrids are introduced into power grid for managing the high penetration of renewable energy sources(RESs). Based on the resistive characteristics of the microgrid line, this paper proposes an inverter control mode combining the outer power loop controller with anti-droop control and the inner voltage-current dual-loop controller. Meanwhile, a complete small signal model of single inverter including anti-droop control, dual-loop control, filter and branch is established. Then considering the coupling relationship of the output voltage phase angles of each inverter, the small-signal model of the microgrid with multiple parallel inverters is established under the global coordinate system. The static stability analysis of the complete microgrid is carried out by the root locus method. Results show that the anti-droop control is more conducive to the accurate distribution and fast response of the active power output by inverter units than the traditional droop control.