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Nonlinear Supersets to Droop Control

Author(s):

M. Sinha, B. Johnson, N. Ainsworth, F. Dörfler, S. Dhople
Conference/Journal:

IEEE COMPEL, Workshop on Control and Modeling for Power Electronics, pp. 6
Abstract:

This paper offers a suite of extensions to Virtual Oscillator Control—a time-domain control method for islanded inverters whereby they are controlled to emulate the dynamics of weakly nonlinear limit-cycle oscillators. First, we develop a coordinate transformation to derive the PWM switching signals from the oscillator dynamic states in a manner that allows the inverter terminal-voltage amplitude and frequency to be traded off against a parametric linear combination of average active and reactive power. Additionally, we compare the time-domain performance of VOC to droop control for parallel connected inverters in two cases: synchronization from a cold start and inverter addition. Finally, with a view towards developing output-filter-design strategies as well as outlining strategies for grid-connected operations, we derive a sufficient condition for a Virtual-Oscillator-controlled inverter to be entrained to a stiff voltage source.

Year:

2015
Type of Publication:

(01)Article
Supervisor:



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% Autogenerated BibTeX entry
@InProceedings { SinEtal:2015:IFA_5300,
    author={M. Sinha and B. Johnson and N. Ainsworth and F. D{\"o}rfler and S.
	  Dhople},
    title={{Nonlinear Supersets to Droop Control}},
    booktitle={IEEE COMPEL, Workshop on Control and Modeling for Power
	  Electronics},
    pages={6},
    year={2015},
    address={},
    month=jul,
    url={http://control.ee.ethz.ch/index.cgi?page=publications;action=details;id=5300}
}
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