An off-line design methodology of droop control for multiple bi-directional distributed energy resources based on voltage sensitivity analysis in DC microgrids

Gi Young Lee, Byoung Sun Ko, Jae Suk Lee, Rae Young Kim

Research output: Contribution to journalArticle

Abstract

The analysis and design of droop control applied to a bi-directional distributed energy resources in a DC microgrid are presented. The effects of line resistance on the power sharing and voltage regulation performance are analysed. To interpret a complicated line configuration, a voltage sensitivity analysis is derived based on a power flow analysis. Based on this analysis, the droop control design methodology is proposed to improve the power sharing accuracy and voltage regulation performance. Stability analysis is performed to analyse the influence of the control parameters and line resistance on the stability of the controller. The design method is applied to the 5-bus meshed line network model with three bi-directional distributed energy resources, three loads, and two non-dispatchable distributed energy resources. The improved power sharing accuracy and voltage regulation performance are verified using PSCAD simulations and the experimental system.

Original languageEnglish
Article number105754
JournalInternational Journal of Electrical Power and Energy Systems
Volume118
DOIs
StatePublished - 2020 Jun

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Energy resources
Voltage control
Sensitivity analysis
Electric potential
Controllers

Keywords

  • DC microgrids
  • Distributed energy resource
  • Droop control
  • Stability analysis
  • Voltage sensitivity analysis

Cite this

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title = "An off-line design methodology of droop control for multiple bi-directional distributed energy resources based on voltage sensitivity analysis in DC microgrids",
abstract = "The analysis and design of droop control applied to a bi-directional distributed energy resources in a DC microgrid are presented. The effects of line resistance on the power sharing and voltage regulation performance are analysed. To interpret a complicated line configuration, a voltage sensitivity analysis is derived based on a power flow analysis. Based on this analysis, the droop control design methodology is proposed to improve the power sharing accuracy and voltage regulation performance. Stability analysis is performed to analyse the influence of the control parameters and line resistance on the stability of the controller. The design method is applied to the 5-bus meshed line network model with three bi-directional distributed energy resources, three loads, and two non-dispatchable distributed energy resources. The improved power sharing accuracy and voltage regulation performance are verified using PSCAD simulations and the experimental system.",
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AU - Lee, Gi Young

AU - Ko, Byoung Sun

AU - Lee, Jae Suk

AU - Kim, Rae Young

PY - 2020/6

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N2 - The analysis and design of droop control applied to a bi-directional distributed energy resources in a DC microgrid are presented. The effects of line resistance on the power sharing and voltage regulation performance are analysed. To interpret a complicated line configuration, a voltage sensitivity analysis is derived based on a power flow analysis. Based on this analysis, the droop control design methodology is proposed to improve the power sharing accuracy and voltage regulation performance. Stability analysis is performed to analyse the influence of the control parameters and line resistance on the stability of the controller. The design method is applied to the 5-bus meshed line network model with three bi-directional distributed energy resources, three loads, and two non-dispatchable distributed energy resources. The improved power sharing accuracy and voltage regulation performance are verified using PSCAD simulations and the experimental system.

AB - The analysis and design of droop control applied to a bi-directional distributed energy resources in a DC microgrid are presented. The effects of line resistance on the power sharing and voltage regulation performance are analysed. To interpret a complicated line configuration, a voltage sensitivity analysis is derived based on a power flow analysis. Based on this analysis, the droop control design methodology is proposed to improve the power sharing accuracy and voltage regulation performance. Stability analysis is performed to analyse the influence of the control parameters and line resistance on the stability of the controller. The design method is applied to the 5-bus meshed line network model with three bi-directional distributed energy resources, three loads, and two non-dispatchable distributed energy resources. The improved power sharing accuracy and voltage regulation performance are verified using PSCAD simulations and the experimental system.

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