New Digital-Controlled Technique for Battery Charger With Constant Current and Voltage Control Without Current Feedback

Chen, Bo‐Yuan; Lai, Yen-Shin

doi:10.1109/tie.2011.2167115

Cited by 130 publications

(45 citation statements)

References 31 publications

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“…Furthermore, since the initial states of the paralleled battery ESDs are uncertain, the process of e SoC elimination can be divided into two stages: 1)e SoC ≥SoC lower ; 2)e SoC <SoC lower . (9) where P lower_assum is the hypothetical value of the output active power of the ESD with SoC lower ; P e_assum is the hypothetical difference value of the output active power between two paralleled ESDs; and P k is the time-varying factor.…”

Section: Principle Of the Soc Error Eliminatingmentioning

confidence: 99%

“…By substituting (9) into (8), equation (8) can be rewritten as: The solution of (11) is: Equation (12) reveals that e SoC and SoC lower will be reduced to zero at the same time in the discharging process by using (9). Therefore, equation (9) can be seen as a boundary condition for making e SoC reach zero before SoC lower .…”

Section: Principle Of the Soc Error Eliminatingmentioning

confidence: 99%

“…Therefore, equation (9) can be seen as a boundary condition for making e SoC reach zero before SoC lower .…”

Section: Principle Of the Soc Error Eliminatingmentioning

confidence: 99%

“…Lots of efforts have been carried out on the integration and coordination of RESs and battery ESDs [6]- [8]. Furthermore, distributed parallel ESDs have been implemented to deal with the demand for increased capacity in islanded microgrids [9]- [12]. When compared with centralized ESDs, distributed ESDs provide an easier way to replace or retrofit batteries with small capacity ESD modules.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

Wang¹,

Wu²,

Zhao³

et al. 2015

Journal of Power Electronics

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Battery energy storage devices (ESDs) have become more and more commonplace to maintain the stability of islanded power systems. Considering the limitation in inverter capacity and the requirement of flexibility in the ESD, the droop control was implemented in paralleled ESDs for higher capacity and autonomous operation. Under the conventional droop control, state-of-charge (SoC) errors between paralleled ESDs is inevitable in the discharging operation. Thus, some ESDs cease operation earlier than expected. This paper proposes an adaptive accelerating parameter to improve the performance of the SoC error eliminating droop controller under the constraints of a microgrid. The SoC of a battery ESD is employed in the active power droop coefficient, which could eliminate the SoC error during the discharging process. In addition, to expedite the process of SoC error elimination, an adaptive accelerating parameter is dedicated to weaken the adverse effect of the constraints due to the requirement of the system running. Moreover, the stability and feasibility of the proposed control strategy are confirmed by small-signal analysis. The effectiveness of the control scheme is validated by simulation and experiment results.

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Section: Principle Of the Soc Error Eliminatingmentioning

confidence: 99%

Section: Principle Of the Soc Error Eliminatingmentioning

confidence: 99%

“…Therefore, equation (9) can be seen as a boundary condition for making e SoC reach zero before SoC lower .…”

Section: Principle Of the Soc Error Eliminatingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

Wang¹,

Wu²,

Zhao³

et al. 2015

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…Energy storage systems (ESSs) are widely used in many applications such as UPS, electrical vehicles and distributed power generation systems [1]- [3]. The voltage rating for each cell in an energy storage device (ESD) such as supercapacitors or batteries is relatively low.…”

Section: Introductionmentioning

confidence: 99%

A Bidirectional Single-Stage DC/AC Converter for Grid Connected Energy Storage Systems

Chen¹,

Liao²,

Sha³

2015

Journal of Power Electronics

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In this paper, a unified control strategy using the current space vector modulation (CSVM) technique is proposed and applied to a bidirectional three-phase DC/AC converter. The operation of the converter changes with the direction of the power flow. In the charging mode, it works as a buck type rectifier; and during the discharging mode, it operates as a boost type inverter, which makes it suitable as an interface between high voltage AC grids and low voltage energy storage devices. This topology has the following advantages: high conversion efficiency, high power factor at the grid side, tight control of the charging current and fast transition between the charging and discharging modes. The operating principle of the mode analysis, the gate signal generation, the general control strategy and the transition from a constant current (CC) to a constant voltage (CV) in the charging mode are discussed. The proposed control strategy has been validated by simulations and experimental results obtained with a 1kW laboratory prototype using supercapacitors as an energy storage device.

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Design and implementation of a high‐efficiency LiFePO₄ battery charger for electric vehicle applications

Chiu

Tseng

et al. 2012

Circuit Theory & Apps

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This letter studies and implements a high-efficiency LiFePO 4 battery charger. The modular design can satisfy the requirements of series/parallel charging for electric vehicle applications. A CC-CC-CV charging scheme is also realized to meet the characteristics of LiFePO 4 battery stacks. A 2 kW laboratory prototype is built and tested. The experimental results are shown to verify the feasibility of the proposed scheme.

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New Digital-Controlled Technique for Battery Charger With Constant Current and Voltage Control Without Current Feedback

Cited by 130 publications

References 31 publications

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

A Bidirectional Single-Stage DC/AC Converter for Grid Connected Energy Storage Systems

Design and implementation of a high‐efficiency LiFePO₄ battery charger for electric vehicle applications

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New Digital-Controlled Technique for Battery Charger With Constant Current and Voltage Control Without Current Feedback

Cited by 130 publications

References 31 publications

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

A Bidirectional Single-Stage DC/AC Converter for Grid Connected Energy Storage Systems

Design and implementation of a high‐efficiency LiFePO4 battery charger for electric vehicle applications

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Product

Resources

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Design and implementation of a high‐efficiency LiFePO₄ battery charger for electric vehicle applications