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

M. M.S. Khan; Yashen Lin; Brian Johnson; Victor Purba; Mohit Sinha; Sairaj Dhople

doi:10.1109/COMPEL.2018.8458494

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

M. M.S. Khan, Yashen Lin, Brian Johnson, Victor Purba, Mohit Sinha, Sairaj Dhople

Power Systems Engineering

Research output: Contribution to conference › Paper › peer-review

16 Scopus Citations

Abstract

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.

Original language	American English
Number of pages	6
DOIs	https://doi.org/10.1109/COMPEL.2018.8458494 https://doi.org/10.1109/COMPEL.2018.8458494
State	Published - 10 Sep 2018
Event	19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018 - Padova, Italy Duration: 25 Jun 2018 → 28 Jun 2018

Conference

Conference	19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018
Country/Territory	Italy
City	Padova
Period	25/06/18 → 28/06/18

Bibliographical note

See NREL/CP-5D00-72265 for preprint

NREL Publication Number

NREL/CP-5D00-72695

Keywords

aggregated model
parallel-connected inverters
reduced-order
virtual oscillator control
VOC

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Khan, M. M. S., Lin, Y., Johnson, B., Purba, V., Sinha, M., & Dhople, S. (2018). A Reduced-Order Aggregated Model for Parallel Inverter Systems with Virtual Oscillator Control. Paper presented at 19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018, Padova, Italy. https://doi.org/10.1109/COMPEL.2018.8458494, https://doi.org/10.1109/COMPEL.2018.8458494

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abstract = "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.",

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author = "Khan, {M. M.S.} and Yashen Lin and Brian Johnson and Victor Purba and Mohit Sinha and Sairaj Dhople",

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Khan, MMS, Lin, Y, Johnson, B, Purba, V, Sinha, M & Dhople, S 2018, 'A Reduced-Order Aggregated Model for Parallel Inverter Systems with Virtual Oscillator Control', Paper presented at 19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018, Padova, Italy, 25/06/18 - 28/06/18. https://doi.org/10.1109/COMPEL.2018.8458494, https://doi.org/10.1109/COMPEL.2018.8458494

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AU - Khan, M. M.S.

AU - Lin, Yashen

AU - Johnson, Brian

AU - Purba, Victor

AU - Sinha, Mohit

AU - Dhople, Sairaj

N1 - See NREL/CP-5D00-72265 for preprint

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N2 - 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.

AB - 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.

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KW - parallel-connected inverters

KW - reduced-order

KW - virtual oscillator control

KW - VOC

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

Abstract

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Keywords

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