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Enhanced local grid voltage support method for high penetration of distributed generators

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4 Author(s)
Demirok, E. ; Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark ; Sera, D. ; Rodriguez, P. ; Teodorescu, R.

Grid voltage rise and thermal loading of network components are the most remarkable barriers to allow high number of distributed generator (DG) connections on the medium voltage (MV) and low voltage (LV) electricity networks. The other barriers such as grid power quality (harmonics, voltage unbalance, flicker etc.) and network protection mechanisms can be figured out once the maximum DG connection capacity of the network is reached. In this paper, additional reactive power reserve of inverter interfaced DGs is exploited to lower the grid voltage level by means of location-adaptive Q(U) droop function. The proposed method aims to achieve less grid voltage violations thus more DG connection on the electricity distribution networks can be allowed.

Published in:

IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society

Date of Conference:

7-10 Nov. 2011