NDLI: A new wind turbine generator / battery energy storage utility interface converter topology with medium-frequency transformer

Content Provider	IEEE Xplore Digital Library
Author	Krishnamoorthy, H.S. Rana, D. Enjeti, P.N.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA (Krishnamoorthy, H.S.; Rana, D.; Enjeti, P.N.)
Abstract	In this paper, a new medium-voltage (MV) wind turbine generator (WTG) - energy storage grid interface converter topology with medium-frequency (MF) link transformer isolation is introduced. The system forms a 3-port network in which several series stacked AC-AC converters transform the low-frequency (50/60 Hz) utility MV into MF (0.4 to 2 kHz) AC voltage by modulating it with MF square wave. This voltage is then fed to the MF transformer primary windings. The secondary and tertiary windings interface with the WTG side and the battery energy storage side respectively after power conversion. The power generated by WTG is transferred to the MF transformer secondary windings through a 3-phase PWM rectifier and a 3-phase PWM inverter, whereas the power transfer between the energy storage and the tertiary winding occurs through a 3-phase PWM inverter. It is shown that the utility grid sinusoidal currents, the battery current and the WTG output currents can be controlled to be of good quality using PI and DQ control strategies. Thus, the proposed MF transformer based 3-port topology results in smaller converter weight/volume. Moreover, the control can effectively handle voltage sags/swells and provide low voltage ride through (LVRT) capability without significant change in the topology. Simulation waveforms along with preliminary experimental results are discussed in this paper.
Sponsorship	IEEE Power Electron. Soc.
Starting Page	2218
Ending Page	2224
File Size	1114465
Page Count	7
File Format	PDF
ISBN	9781467343541
ISSN	10482334
e-ISBN	9781467343558
e-ISBN	9781467343534
DOI	10.1109/APEC.2013.6520603
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-03-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	LVRT Medium frequency transformer battery energy storage 3-port network wind turbine grid integration
Content Type	Text
Resource Type	Article

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