Energy management in DC microgrid with an efficient voltage compensation mechanism

Md Shafiul Alam; Fahad Saleh Al-Ismail; Fahad A. Al-Sulaiman; Mohammad A. Abido

doi:10.1016/j.epsr.2022.108842

Energy management in DC microgrid with an efficient voltage compensation mechanism

Md Shafiul Alam^*, Fahad Saleh Al-Ismail, Fahad A. Al-Sulaiman, Mohammad A. Abido

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Direct current (DC) microgrid facilitates the integration of renewable energy sources as a form of distributed generators (DGs), DC loads, and energy storage system (ESS) devices. A new voltage compensation mechanism is presented in this study to resolve the control issues of DC microgrid in a distributed manner. In this mechanism, a fractional-order voltage compensation term is used in the outer controller loop which eliminates the voltage deviation in the steady-state condition. A detailed mathematical model is developed for the ESS along with the new voltage compensation controller to facilitate proper tuning of the control parameters. Since the proposed voltage compensation term guarantees autonomous bus voltage restoration, the supercapacitor state of charge (SoC) remains at nominal value without violation while it only buffers fluctuating power. However, the battery only compensates for the nominal power demand. The DG power control algorithm strictly maintains the battery SoC within lower and upper bounds. A DC microgrid comprising hybrid ESS, DC load, constant power load (CPL), and distributed generator is implemented with real time digital simulator (RTDS). The results show that the proposed controller is reliable, leading to excellent ESS performance and power management within the microgrid, without any DC bus voltage deviation.

Original language	English
Article number	108842
Journal	Electric Power Systems Research
Volume	214
DOIs	https://doi.org/10.1016/j.epsr.2022.108842
State	Published - 1 Jan 2023

Bibliographical note

Funding Information:
The authors would like to thank King Fahd University of Petroleum & Minerals (KFUPM), Saudi Arabia for its support under Direct Funded Project No. DF201022. The authors also acknowledge the support provided by ARCEMS, IRC-REPS, and KACARE ERIC, KFUPM, Saudi Arabia.

Funding Information:
The authors would like to thank King Fahd University of Petroleum & Minerals (KFUPM), Saudi Arabia for its support under Direct Funded Project No. DF201022 . The authors also acknowledge the support provided by ARCEMS, IRC-REPS, and KACARE ERIC, KFUPM, Saudi Arabia .

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

Direct current (DC) microgrid
Energy storage system
Fractional-order voltage compensation
Small-signal model
State of charge
Supercapacitor and battery

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

UN SDGs

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

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10.1016/j.epsr.2022.108842

Cite this

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title = "Energy management in DC microgrid with an efficient voltage compensation mechanism",

abstract = "Direct current (DC) microgrid facilitates the integration of renewable energy sources as a form of distributed generators (DGs), DC loads, and energy storage system (ESS) devices. A new voltage compensation mechanism is presented in this study to resolve the control issues of DC microgrid in a distributed manner. In this mechanism, a fractional-order voltage compensation term is used in the outer controller loop which eliminates the voltage deviation in the steady-state condition. A detailed mathematical model is developed for the ESS along with the new voltage compensation controller to facilitate proper tuning of the control parameters. Since the proposed voltage compensation term guarantees autonomous bus voltage restoration, the supercapacitor state of charge (SoC) remains at nominal value without violation while it only buffers fluctuating power. However, the battery only compensates for the nominal power demand. The DG power control algorithm strictly maintains the battery SoC within lower and upper bounds. A DC microgrid comprising hybrid ESS, DC load, constant power load (CPL), and distributed generator is implemented with real time digital simulator (RTDS). The results show that the proposed controller is reliable, leading to excellent ESS performance and power management within the microgrid, without any DC bus voltage deviation.",

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note = "Funding Information: The authors would like to thank King Fahd University of Petroleum & Minerals (KFUPM), Saudi Arabia for its support under Direct Funded Project No. DF201022. The authors also acknowledge the support provided by ARCEMS, IRC-REPS, and KACARE ERIC, KFUPM, Saudi Arabia. Funding Information: The authors would like to thank King Fahd University of Petroleum & Minerals (KFUPM), Saudi Arabia for its support under Direct Funded Project No. DF201022 . The authors also acknowledge the support provided by ARCEMS, IRC-REPS, and KACARE ERIC, KFUPM, Saudi Arabia . Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

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AU - Abido, Mohammad A.

N1 - Funding Information: The authors would like to thank King Fahd University of Petroleum & Minerals (KFUPM), Saudi Arabia for its support under Direct Funded Project No. DF201022. The authors also acknowledge the support provided by ARCEMS, IRC-REPS, and KACARE ERIC, KFUPM, Saudi Arabia. Funding Information: The authors would like to thank King Fahd University of Petroleum & Minerals (KFUPM), Saudi Arabia for its support under Direct Funded Project No. DF201022 . The authors also acknowledge the support provided by ARCEMS, IRC-REPS, and KACARE ERIC, KFUPM, Saudi Arabia . Publisher Copyright: © 2022 Elsevier B.V.

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N2 - Direct current (DC) microgrid facilitates the integration of renewable energy sources as a form of distributed generators (DGs), DC loads, and energy storage system (ESS) devices. A new voltage compensation mechanism is presented in this study to resolve the control issues of DC microgrid in a distributed manner. In this mechanism, a fractional-order voltage compensation term is used in the outer controller loop which eliminates the voltage deviation in the steady-state condition. A detailed mathematical model is developed for the ESS along with the new voltage compensation controller to facilitate proper tuning of the control parameters. Since the proposed voltage compensation term guarantees autonomous bus voltage restoration, the supercapacitor state of charge (SoC) remains at nominal value without violation while it only buffers fluctuating power. However, the battery only compensates for the nominal power demand. The DG power control algorithm strictly maintains the battery SoC within lower and upper bounds. A DC microgrid comprising hybrid ESS, DC load, constant power load (CPL), and distributed generator is implemented with real time digital simulator (RTDS). The results show that the proposed controller is reliable, leading to excellent ESS performance and power management within the microgrid, without any DC bus voltage deviation.

AB - Direct current (DC) microgrid facilitates the integration of renewable energy sources as a form of distributed generators (DGs), DC loads, and energy storage system (ESS) devices. A new voltage compensation mechanism is presented in this study to resolve the control issues of DC microgrid in a distributed manner. In this mechanism, a fractional-order voltage compensation term is used in the outer controller loop which eliminates the voltage deviation in the steady-state condition. A detailed mathematical model is developed for the ESS along with the new voltage compensation controller to facilitate proper tuning of the control parameters. Since the proposed voltage compensation term guarantees autonomous bus voltage restoration, the supercapacitor state of charge (SoC) remains at nominal value without violation while it only buffers fluctuating power. However, the battery only compensates for the nominal power demand. The DG power control algorithm strictly maintains the battery SoC within lower and upper bounds. A DC microgrid comprising hybrid ESS, DC load, constant power load (CPL), and distributed generator is implemented with real time digital simulator (RTDS). The results show that the proposed controller is reliable, leading to excellent ESS performance and power management within the microgrid, without any DC bus voltage deviation.

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Energy management in DC microgrid with an efficient voltage compensation mechanism

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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