A Reduced-order Aggregated Model for Parallel Inverter Systems with Virtual Oscillator Control

This paper introduces a reduced-order aggregated model for parallel-connected inverters controlled with virtual oscillator control (VOC). The premise of VOC is to modulate inverter dynamics to emulate those of nonlinear oscillators with the goal of realizing a stable ac microgrid in the absence of c...

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Bibliographic Details
Published in2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL) pp. 1 - 6
Main Authors Khan, M. M. S., Yashen Lin, Johnson, Brian, Purba, Victor, Sinha, Mohit, Dhople, Sairaj
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2018
Subjects
Aggregates
Analytical models
Computational modeling
Inverters
Mathematical model
Oscillators
Voltage control
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Summary:This paper introduces a reduced-order aggregated model for parallel-connected inverters controlled with virtual oscillator control (VOC). The premise of VOC is to modulate inverter dynamics to emulate those of nonlinear oscillators with the goal of realizing a stable ac microgrid in the absence of communication, synchronous generation, or a stiff grid. To obtain a reduced-order model for a system of parallel-connected inverters with VOC, we first formulate a set of scaling laws that describe how the controller and filter parameters of a given inverter depend on its voltage and power rating. Subsequently, we show that N parallel inverters which adhere to this scaling law can be modeled with the same structure and hence the same computational burden of the model of a single inverter. The proposed aggregate model is experimentally validated on a system of three parallel inverters with heterogeneous power ratings.
DOI:10.1109/COMPEL.2018.8458494