NDLI: Assessment of an improved droop control scheme for DG inverter based microgrids

Content Provider	IEEE Xplore Digital Library
Author	Raciti, A. Bignucolo, F. Caldon, R.
Copyright Year	2015
Description	Author affiliation: Dept. of Ind. Eng., Univ. of Padova, Padua, Italy (Raciti, A.; Bignucolo, F.; Caldon, R.)
Abstract	In this paper an improved droop control strategy is proposed. The droop method allows inverter interfaced power units to independently feed loads according to variables measured only at the inverter connection point. The conventional droop method is however affected by an inherent issue regarding the power measurement that is necessary to deviate frequency and voltage magnitude in order to reach optimal power sharing. The conventional power measurement strategy is often based on a first order low pass filter. This implies a trade-off between a suitable power ripple rejection and the bandwidth limitation on the overall control scheme due to the inherent low frequency pole. In this paper a different filtering scheme is proposed and investigated through an analytical approach. A comparison between the conventional and the proposed control schemes is discussed through a detailed analysis. A case study of a microgrid fed by two inverters is also presented to show the improvements in dynamic performances using the proposed control architecture.
Starting Page	1
Ending Page	6
File Size	5523685
Page Count	6
File Format	PDF
e-ISBN	9781467396820
DOI	10.1109/UPEC.2015.7339815
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-01
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reactive power Power measurement Filtering low pass filter Cutoff frequency Droop control notch filter Inverters Frequency measurement Impedance inverter-based microgrids power measurement
Content Type	Text
Resource Type	Article

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