Izvorni znanstveni članak
https://doi.org/10.1080/00051144.2018.1501462
A new power sharing control method for an autonomous microgrid with regard to the system stability
A. Khaledian
; Department of electrical engineering, K. N. Toosi University of Technology, Tehran, Iran
M. Aliakbar Golkar
; Department of electrical engineering, K. N. Toosi University of Technology, Tehran, Iran
Sažetak
Droop control is the conventional way to share the demand power among the generators in a microgrid. Analyzing this control method shows that it has poor performance in reactive power sharing. Generated reactive power of each microsource depends on the active load demand. In this paper, a control method is proposed to improve the reactive power sharing performance. It is indicated that higher reactive power droop gains make the generated reactive power to be
less influenced from the changes in active load. However, high droop gains can lead the system to instability. Hence considering eigenvalue analysis of the microgrid, a new auxiliary controller is proposed to damp the oscillations caused by high droop gains. In the new method, there is
not the need for monitoring the grid impedance to tune the controllers. To verify the proposed method, load step is applied to a test microgrid and the results are shown. In the new method, total generated reactive power is reduced in comparison to the conventional droop controller
and the system stability is maintained.
Ključne riječi
Distributed generation; microgrid; power control; power system stability; reactive power
Hrčak ID:
225183
URI
Datum izdavanja:
6.8.2018.
Posjeta: 761 *