A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint

Rahul Mallik; Branko Majmunovic; Soham Dutta; Gab-Su Seo; Dragan Maksimovic; Brian Johnson

A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint

Rahul Mallik, Branko Majmunovic, Soham Dutta, Gab-Su Seo, Dragan Maksimovic, Brian Johnson

Power Systems Engineering

Research output: Contribution to conference › Paper

Abstract

The objective of this paper is to realize a universal dc-side controller for photovoltaic (PV) systems where the control is agnostic to the downstream converter configuration. To achieve this, the downstream power converter and its controls are manipulated into an effective power control loop that is then cast into a generalized multi-loop design framework. On the dc side, a nonlinear small-signal model of the PV input is realized exclusively in terms of PV datasheet parameters (i.e., open-circuit voltage, short-circuit current, and maximum power point). Finally, a linear controller is used to modulate the dc-side PV system with the generic downstream power controller. A Lyapunov candidate is proposed to analyze the stability of the interconnected system and provide a streamlined approach for the controller design. The proposed design is validated on a 1-kVA experimental setup that interfaces a PV module to the grid.

Original language	American English
Number of pages	10
State	Published - 2022
Event	IEEE Energy Conversion Congress and Exposition - Detroit, Michigan Duration: 9 Oct 2022 → 13 Oct 2022

Conference

Conference	IEEE Energy Conversion Congress and Exposition
City	Detroit, Michigan
Period	9/10/22 → 13/10/22

Bibliographical note

See NREL/CP-5D00-85112 for paper as published in proceedings

NREL Publication Number

NREL/CP-5D00-83961

Keywords

dc-dc control
Lyapunov analysis
photovoltaic systems
time scale separation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

https://www.nrel.gov/docs/fy23osti/83961.pdf

Cite this

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title = "A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint",

abstract = "The objective of this paper is to realize a universal dc-side controller for photovoltaic (PV) systems where the control is agnostic to the downstream converter configuration. To achieve this, the downstream power converter and its controls are manipulated into an effective power control loop that is then cast into a generalized multi-loop design framework. On the dc side, a nonlinear small-signal model of the PV input is realized exclusively in terms of PV datasheet parameters (i.e., open-circuit voltage, short-circuit current, and maximum power point). Finally, a linear controller is used to modulate the dc-side PV system with the generic downstream power controller. A Lyapunov candidate is proposed to analyze the stability of the interconnected system and provide a streamlined approach for the controller design. The proposed design is validated on a 1-kVA experimental setup that interfaces a PV module to the grid.",

keywords = "dc-dc control, Lyapunov analysis, photovoltaic systems, time scale separation",

author = "Rahul Mallik and Branko Majmunovic and Soham Dutta and Gab-Su Seo and Dragan Maksimovic and Brian Johnson",

note = "See NREL/CP-5D00-85112 for paper as published in proceedings; IEEE Energy Conversion Congress and Exposition ; Conference date: 09-10-2022 Through 13-10-2022",

year = "2022",

language = "American English",

}

TY - CONF

T1 - A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint

AU - Mallik, Rahul

AU - Majmunovic, Branko

AU - Dutta, Soham

AU - Seo, Gab-Su

AU - Maksimovic, Dragan

AU - Johnson, Brian

N1 - See NREL/CP-5D00-85112 for paper as published in proceedings

PY - 2022

Y1 - 2022

N2 - The objective of this paper is to realize a universal dc-side controller for photovoltaic (PV) systems where the control is agnostic to the downstream converter configuration. To achieve this, the downstream power converter and its controls are manipulated into an effective power control loop that is then cast into a generalized multi-loop design framework. On the dc side, a nonlinear small-signal model of the PV input is realized exclusively in terms of PV datasheet parameters (i.e., open-circuit voltage, short-circuit current, and maximum power point). Finally, a linear controller is used to modulate the dc-side PV system with the generic downstream power controller. A Lyapunov candidate is proposed to analyze the stability of the interconnected system and provide a streamlined approach for the controller design. The proposed design is validated on a 1-kVA experimental setup that interfaces a PV module to the grid.

AB - The objective of this paper is to realize a universal dc-side controller for photovoltaic (PV) systems where the control is agnostic to the downstream converter configuration. To achieve this, the downstream power converter and its controls are manipulated into an effective power control loop that is then cast into a generalized multi-loop design framework. On the dc side, a nonlinear small-signal model of the PV input is realized exclusively in terms of PV datasheet parameters (i.e., open-circuit voltage, short-circuit current, and maximum power point). Finally, a linear controller is used to modulate the dc-side PV system with the generic downstream power controller. A Lyapunov candidate is proposed to analyze the stability of the interconnected system and provide a streamlined approach for the controller design. The proposed design is validated on a 1-kVA experimental setup that interfaces a PV module to the grid.

KW - dc-dc control

KW - Lyapunov analysis

KW - photovoltaic systems

KW - time scale separation

M3 - Paper

T2 - IEEE Energy Conversion Congress and Exposition

Y2 - 9 October 2022 through 13 October 2022

ER -

A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

Access to Document

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Cite this