NDLI: Investigation of Inter-Line Dynamic Voltage Restorer with virtual impedance injection

Content Provider	IEEE Xplore Digital Library
Author	Elserougi, A. Hossam-Eldin, A. Massoud, A. Ahmed, S.
Copyright Year	2010
Description	Author affiliation: Electrical and computer Engineering Dept. Qatar university, Qatar (Massoud, A.) \|\| Electrical and computer Engineering Dept. Texas A&M University at Qatar, Qatar (Ahmed, S.) \|\| Electrical Engineering Department Alexandria university, Egypt (Elserougi, A.; Hossam-Eldin, A.)
Abstract	The Inter-Line Dynamic Voltage Restorer (IDVR) consists of several voltage source inverters connected to different independent distribution feeders with common dc bus. When one of the inverters compensates for voltage sag that appears in its feeder (voltage control mode), the other inverters pump the required power into the dc bus (power control mode). Each inverter will have both voltage and power controllers; only one controller is in use during the abnormal conditions according to its feeder state. The voltage controller uses one of the dynamic voltage restoration techniques. In this paper, the in-phase technique is applied and two types of loads are considered (constant impedance and three phase induction motor). Since the voltage restoration process may need real power injection into the distribution system. The power controller injects this power via voltage injection; this voltage injection is simulated by voltage drop across series virtual impedance. A new scheme is proposed to select the impedance value. The impedance value is selected such that the power consumed by this impedance represents the required power to be transferred without perturbing the load voltage. The performance of this system is also studied during voltage swell. Simulation results substantiate the proposed concept.
Starting Page	1975
Ending Page	1980
File Size	1098569
Page Count	6
File Format	PDF
ISBN	9781424452255
ISSN	1553572X
DOI	10.1109/IECON.2010.5675290
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage control Voltage fluctuations Inverters Impedance Switches Reactive power power Quality Dynamic voltage restorers IDVR voltage sag voltage swell
Content Type	Text
Resource Type	Article

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