Open AccessResearch of virtual impedance layering and distributing control strategy of hybrid renewable energy microgrid
Author(s) -
Qingguang Yu,
Zhicheng Jiang,
Mengchu Zhao,
Yuming Liu,
Min Guo
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1619/1/012012
Subject(s) - voltage droop , microgrid , renewable energy , distributed generation , output impedance , grid , automatic frequency control , computer science , electrical impedance , electrical engineering , electronic engineering , power (physics) , engineering , automotive engineering , voltage , voltage source , physics , geometry , mathematics , quantum mechanics
Micro-grid technology will combine hybrid renewable energy and power generation technology, clean and environmental protection, improve the utilization of renewable energy; the use of distributed generation units installed in the local characteristics of the governor from the transmission loss and cost. This paper introduced the virtual impedance into the traditional droop control, make the output impedance and line impedance of the inverter are mainly inductive, so the droop control algorithm is implemented. This paper presented a new method based on the virtual impedance to adjust the frequency and voltage of the micro-grid bus two times, to realize the two adjustment of the frequency and voltage of the micro grid. In addition, for the micro-grid power network interaction, based on PQ closed loop control method is proposed to response to the dispatching command. The simulation results show high performance of the designed control strategy.