Sensorless Feedforward Current Control of Dual-Active-Bridge DC/DC Converter for Micro-Grid Applications

Duy Dinh Nguyen; Dinh Hoa Nguyen; Minh C. Ta; Goro Fujita

doi:10.1016/j.ifacol.2018.11.724

Sensorless Feedforward Current Control of Dual-Active-Bridge DC/DC Converter for Micro-Grid Applications

Duy Dinh Nguyen, Dinh Hoa Nguyen, Minh C. Ta, Goro Fujita

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

6 Citations (Scopus)

Abstract

In Dual-Active-Bridge converter control system, high frequency terminal current is usually measured then fed-back to the current mode controller. However, the measurement requires wide bandwidth sensors, fast and precise operational amplifier, and high sampling rate Analog to Digital conversion. This paper proposes a Proportional Integral Observer to estimate such the current to eliminate the need of current sensors. A combined feedforward-feedback control system is then developed to enhance the system dynamics and to regulate the output voltage. The control system needs only the information of terminal voltages. Simulation and experiment results show that the observer performs fast and accurately with acceptable observation error; and the output voltage is well regulated regardless of load changes.

Original language	English
Pages (from-to)	333-338
Number of pages	6
Journal	IFAC-PapersOnLine
Volume	51
Issue number	28
DOIs	https://doi.org/10.1016/j.ifacol.2018.11.724
Publication status	Published - 2018

Keywords

Dual-Active-Bridge converter
Feedforward controller
Proportional Integral Observer
Sensorless current control
Solid-State-Transformer

ASJC Scopus subject areas

Control and Systems Engineering

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10.1016/j.ifacol.2018.11.724

Cite this

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title = "Sensorless Feedforward Current Control of Dual-Active-Bridge DC/DC Converter for Micro-Grid Applications",

abstract = "In Dual-Active-Bridge converter control system, high frequency terminal current is usually measured then fed-back to the current mode controller. However, the measurement requires wide bandwidth sensors, fast and precise operational amplifier, and high sampling rate Analog to Digital conversion. This paper proposes a Proportional Integral Observer to estimate such the current to eliminate the need of current sensors. A combined feedforward-feedback control system is then developed to enhance the system dynamics and to regulate the output voltage. The control system needs only the information of terminal voltages. Simulation and experiment results show that the observer performs fast and accurately with acceptable observation error; and the output voltage is well regulated regardless of load changes.",

keywords = "Dual-Active-Bridge converter, Feedforward controller, Proportional Integral Observer, Sensorless current control, Solid-State-Transformer",

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T1 - Sensorless Feedforward Current Control of Dual-Active-Bridge DC/DC Converter for Micro-Grid Applications

AU - Nguyen, Duy Dinh

AU - Nguyen, Dinh Hoa

AU - Ta, Minh C.

AU - Fujita, Goro

PY - 2018

Y1 - 2018

N2 - In Dual-Active-Bridge converter control system, high frequency terminal current is usually measured then fed-back to the current mode controller. However, the measurement requires wide bandwidth sensors, fast and precise operational amplifier, and high sampling rate Analog to Digital conversion. This paper proposes a Proportional Integral Observer to estimate such the current to eliminate the need of current sensors. A combined feedforward-feedback control system is then developed to enhance the system dynamics and to regulate the output voltage. The control system needs only the information of terminal voltages. Simulation and experiment results show that the observer performs fast and accurately with acceptable observation error; and the output voltage is well regulated regardless of load changes.

AB - In Dual-Active-Bridge converter control system, high frequency terminal current is usually measured then fed-back to the current mode controller. However, the measurement requires wide bandwidth sensors, fast and precise operational amplifier, and high sampling rate Analog to Digital conversion. This paper proposes a Proportional Integral Observer to estimate such the current to eliminate the need of current sensors. A combined feedforward-feedback control system is then developed to enhance the system dynamics and to regulate the output voltage. The control system needs only the information of terminal voltages. Simulation and experiment results show that the observer performs fast and accurately with acceptable observation error; and the output voltage is well regulated regardless of load changes.

KW - Dual-Active-Bridge converter

KW - Feedforward controller

KW - Proportional Integral Observer

KW - Sensorless current control

KW - Solid-State-Transformer

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Sensorless Feedforward Current Control of Dual-Active-Bridge DC/DC Converter for Micro-Grid Applications

Abstract

Keywords

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