Open AccessA New Adaptive Control Strategy of active and reactive power sharing in Islanded Microgrids
Author(s) -
Phúc Duy Lê,
Duy Võ Hoàng,
Hieu T. Pham,
Hong Ha Nguyen,
Dieu Ngoc Vo
Publication year - 2016
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v19i4.779
Subject(s) - microgrid , voltage droop , ac power , inverter , control theory (sociology) , computer science , power control , power (physics) , matlab , transmission line , distributed generation , engineering , voltage , electronic engineering , control (management) , voltage source , electrical engineering , telecommunications , renewable energy , physics , quantum mechanics , artificial intelligence , operating system
This paper proposes a new control sharing method for parallel three-phase inverters in an islanded microgrid. The proposed technique uses adaptive PIDs combined with the communication among the parallel inverters to accurately share active power and reactive power among the inverters via adjusting the desired voltage if there is a distinct difference between line impedance and the load change in the microgrid. Moreover, the paper also presents the response ability of the inverters to maintain the error within the allowed limits as the transmission line is interrupted. The proposed technique has been verified in a microgrid with three parallel distributed generation-inverter units using Matlab/Simulink. In the simulation, as the droop control using the communication information among the inverters, the sharing errors for active power and reactive power are around 0.2% and 0.6%, respectively. As the connection between the microgrid and transmission line is interrupted, the sharing errors for active power and reactive power increase to 0.4% and 2%, respectively. The simulation results have indicated that the proposed technique is superior to the traditional droop control in terms of the accuracy and stability. Therefore, the new proposed technique can be a favor alternative model for active power and reactive power sharing control of parallel inverters in an islanded microgrid.