NDLI: Analysis of grid current control in consideration of voltage feedforward and cable capacitance demonstrated on a fully sized wind turbine installed in a wind park

Content Provider	IEEE Xplore Digital Library
Author	Fuchs, F. Pham, D.V. Mertens, A.
Copyright Year	2013
Description	Author affiliation: Inst. for Drive Syst. & Power Electron., Leibniz Univ. Hannover, Hannover, Germany (Fuchs, F.; Pham, D.V.; Mertens, A.)
Abstract	Before commissioning grid side converters of wind turbines, their behaviour is often validated by computer simulation. In simulation models, the grid coupling is usually modelled as inductance, resistance and ideal voltage source. The current controller is typically designed assuming that the grid influence is perfectly compensated by a voltage feedforward. In this paper it is shown that these two assumptions are under some conditions too rough and can hide oscillatory behaviour due to the following reasons. In reality the grid impedance is the result of the layout of the grid, having multiple resonances and varying with load and time. Furthermore, the voltage feedforward of the grid side current control is filtered and discrete (converter switching frequency) and does therefore not guarantee perfect decoupling from the grid situation. In this paper, the effect of imperfect grid voltage compensation is analysed for a 2 MW wind turbine installed in a wind park by using a more complex representation of the grid impedance. It is shown by transfer function analysis and time domain simulation that resonances with the cable capacitance can lead to oscillatory behaviour, although the current control loop shows excellent results when no capacitances are present.
Starting Page	3325
Ending Page	3332
File Size	1035505
Page Count	8
File Format	PDF
ISBN	9781479903368
DOI	10.1109/ECCE.2013.6647137
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current control Analytical models Pulse width modulation Capacitance Feedforward neural networks Impedance Voltage control
Content Type	Text
Resource Type	Article

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