Voltage Imbalance Compensation for Droop-Controlled Inverters in Islanded Microgrid

محورهای موضوعی : مهندسی هوشمند برق

Amin Ranjabaran ¹ (Department of Electrical and Electronics Engineering, Islamic Azad university, Gonabad Branch,Gonabad, Iran)
Mahmoud Ebadian ² (Department of Electrical and Computer Engineering, University of Birjand, Birjand, Iran)
Mohammad Sadegh Ghazizadeh ³ (Department of Electrical and Computer Engineering, Abbaspour College, Shahid Beheshti University, Tehran, Iran)

تاریخ دریافت : 1396/10/04 تاریخ پذیرش : 1396/10/29 تاریخ انتشار : 1396/10/10

کلید واژه: critical load, islanded microgrid, droop control method, voltage imbalance compensation,

چکیده مقاله :

In this paper, a new control strategy is proposed for implementation in low-voltage microgrids with balanced/ unbalanced load circumstances. The proposed scheme contains, the power droop controllers, inner voltage and current loops, the virtual impedance loop, the voltage imbalance compensation. The proposed strategy balances the voltage of the single-phase critical loads by compensating the imbalanced voltage drop on thefeeders. In addition, this strategy has also shown to be capable of restoring critical loads’ voltage to nominal values. This method also shares the real and reactive load accurately between DG units, based on their capacity. The simulation results in MATLAB /SIMULINK environment show the efficiency of the proposed approach in improving power sharing among DG units and decreasing voltage imbalance