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 outputfilter-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.
|Original language||English (US)|
|Title of host publication||2015 IEEE 16th Workshop on Control and Modeling for Power Electronics, COMPEL 2015|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Sep 1 2015|
|Event||16th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2015 - Vancouver, Canada|
Duration: Jul 12 2015 → Jul 15 2015
|Name||2015 IEEE 16th Workshop on Control and Modeling for Power Electronics, COMPEL 2015|
|Other||16th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2015|
|Period||7/12/15 → 7/15/15|
Bibliographical noteFunding Information:
M. Sinha and S. V. Dhople were supported in part by the Institute of Renewable Energy and the Environment, UMN, under grant RL-0010-13; the Office of Naval Research under grant N000141410639; and the National Science Foundation under the CAREER award ECCS-1453921. B. B. Johnson and N. G. Ainsworth were supported by the Laboratory Directed Research and Development Program at NREL and by the U.S. Department of Energy under Contract No. DE-AC36-08- GO28308 with NREL. F. D?rfler was supported in part by the Swiss National Science Foundation AP Energy Grant 160573 and by ETH Z?rich Startup Funds.
© 2015 IEEE.