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Title: Comparison of Virtual Oscillator and Droop Control: Preprint

Abstract

Virtual oscillator control and droop control are two techniques that can be used to ensure synchronization and power sharing of parallel inverters in islanded operation. VOC relies on the implementation of non-linear Van der Pol oscillator equations in the control system of the inverter, acting upon the time-domain instantaneous inverter current and terminal voltage. On the other hand, DC explicitly computes active and reactive power produced by the inverter and relies on limited bandwidth low-pass filters. Even though both methods can be engineered to produce the same steady-state characteristics, their dynamic performances are significantly different. This paper presents analytical and experimental results that aim to compare both methods. It is shown that VOC is inherently faster and enables minimizing the circulating currents. The results are verified using three 120V, 1kW inverters.

Authors:
 [1];  [1];  [2];  [2]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. University of Minessota
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
OSTI Identifier:
1379474
Report Number(s):
NREL/CP-5D00-68204
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 2017 IEEE 18th Workshop on Control and Modeling for Power Electronics (COMPEL), 9-12 July 2017, Stanford, California
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; virtual oscillator; droop control; island; microgrid

Citation Formats

Johnson, Brian B, Rodriguez, Miguel, Dhople, Sairaj, and Sinha, Mohit. Comparison of Virtual Oscillator and Droop Control: Preprint. United States: N. p., 2017. Web. doi:10.1109/COMPEL.2017.8013298.
Johnson, Brian B, Rodriguez, Miguel, Dhople, Sairaj, & Sinha, Mohit. Comparison of Virtual Oscillator and Droop Control: Preprint. United States. doi:10.1109/COMPEL.2017.8013298.
Johnson, Brian B, Rodriguez, Miguel, Dhople, Sairaj, and Sinha, Mohit. Fri . "Comparison of Virtual Oscillator and Droop Control: Preprint". United States. doi:10.1109/COMPEL.2017.8013298. https://www.osti.gov/servlets/purl/1379474.
@article{osti_1379474,
title = {Comparison of Virtual Oscillator and Droop Control: Preprint},
author = {Johnson, Brian B and Rodriguez, Miguel and Dhople, Sairaj and Sinha, Mohit},
abstractNote = {Virtual oscillator control and droop control are two techniques that can be used to ensure synchronization and power sharing of parallel inverters in islanded operation. VOC relies on the implementation of non-linear Van der Pol oscillator equations in the control system of the inverter, acting upon the time-domain instantaneous inverter current and terminal voltage. On the other hand, DC explicitly computes active and reactive power produced by the inverter and relies on limited bandwidth low-pass filters. Even though both methods can be engineered to produce the same steady-state characteristics, their dynamic performances are significantly different. This paper presents analytical and experimental results that aim to compare both methods. It is shown that VOC is inherently faster and enables minimizing the circulating currents. The results are verified using three 120V, 1kW inverters.},
doi = {10.1109/COMPEL.2017.8013298},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 2017},
month = {Fri Sep 01 00:00:00 EDT 2017}
}

Conference:
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