In this paper, we present a virtual oscillator control (VOC) strategy for power inverters to operate in either grid-connected or islanded settings. The proposed controller is based on the dynamics of the nonlinear Andronov-Hopf oscillator and it provides voltage regulation, frequency support in islanded mode. It also features the potential to respond to real- and reactive-power setpoints for dispatchability in grid-connected mode. In contrast to early VOC incarnations which exhibit undesirable harmonics, the proposed controller offers a sinusoidal ac limit cycle as well as improved dynamic performance. Moreover, the proposed controller intrinsically generates orthogonal signals which facilitate implementation in three-phase systems. We study the controller dynamical model and outline a systematic design procedure such that the inverter satisfies standard ac performance specifications. Numerical simulations validate the analytical developments.
|Original language||English (US)|
|Title of host publication||2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||7|
|State||Published - Sep 2019|
|Event||11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States|
Duration: Sep 29 2019 → Oct 3 2019
|Name||2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019|
|Conference||11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019|
|Period||9/29/19 → 10/3/19|
Bibliographical noteFunding Information:
M. Lu, S. Dutta and B. Johnson were supported by the US Department of Energy Solar Energy Technology office under grants DE-EE0000-1583 and DE-EE0008346. Support was also provided by the Washington Research Foundation and the Clean Energy Institute at the University of Washington. V. Purba and S. V. Dhople were supported in part by the National Science Foundation through grant 1509277.
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