NDLI: Improved voltage disturbance rejection of grid-connected VSC under unbalanced voltage sag based on grid dynamic model

Content Provider	IEEE Xplore Digital Library
Author	Hasan, H.
Copyright Year	2013
Description	Author affiliation: Electr. Eng. Dept., Univ. Syiah Kuala, Banda Aceh, Indonesia (Hasan, H.)
Abstract	This paper presents a new approach in the mitigation of unbalanced voltage sag by grid-connected voltage source converter (VSC). The feed forward (FF) controller architecture is adopted with the objective to minimize the impact of unbalanced voltage in the disruption of the dc-bus voltage. To deal with the existing independent control of active and reactive power, two FF controllers are needed. The first FF controller trims the dc-voltage controller output signal and provides correction for the d-axis current (active power) reference. The other feed forward controller trims the reactive/voltage support controller output signal to provide correction on the q-axis current (reactive power) reference. The computation elements of the FF controller are based on the linearized grid model in synchronous frame. The FF controller is tuned at $-2ω_{1}$ which is the frequency in synchronous frame where the unbalanced voltage takes place. For verification of the proposed controller feasibility, simulation is used. The results show that the proposed FF controllers can seek to minimize the impact of unbalanced voltage sag particularly in maintaining the oscillating voltage closer to the dc-voltage reference point.
Starting Page	92
Ending Page	97
File Size	1071960
Page Count	6
File Format	PDF
ISBN	9781467357951
e-ISBN	9781467357982
DOI	10.1109/ICA.2013.6734070
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-08-28
Publisher Place	Indonesia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage source converter Reactive power Voltage fluctuations Voltage sags Vectors Power conversion Feeds Voltage control Unbalanced voltage
Content Type	Text
Resource Type	Article

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