A simplified control scheme for electric vehicle-power grid circuit with DC distribution and battery storage systems

Musasa, Kabeya; Muheme, Musole Innocent; Nwulu, Nnamdi; Muchie, Mammo

doi:10.1080/20421338.2018.1527888

Cited by 3 publications

(12 citation statements)

References 9 publications

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“…This disadvantage is shared by other charging/discharging systems based on Buck, Buck-Boost, or Zeta converters and has been mitigated by connecting a capacitor in parallel to the battery. Such a capacitor does not affect the dynamic response of the charging/discharging system and absorbs the high frequency components of the battery current [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…A state-of-the-art in this topic shows that the flyback converter has been used to implement battery charging systems for generic applications [21,22], electric vehicles [23][24][25][26], phones [27], PV systems [28,29], and microgrids [6]. Additionally, the flyback converter has also been used for other applications involving batteries like power supply of DC motors [19,30], LED drivers [20], and rectifiers [31]. Nevertheless, the authors have not found up to now any ESD charging/discharging system with a flyback converter to regulate the voltage in a DC bus.…”

Section: Introductionmentioning

confidence: 99%

“…While in [27,28] the authors provide additional equations to determine more characteristics of the snubber circuit elements [27] and the HFT [28] for a phone battery charger [27] and a PV-based uninterruptible power supply [28]. Moreover, other papers are focused on the design of the flyback HFT for a LED illumination system [20] or on providing equations to calculate just L m [24,33] or L m and C dc [19,26] for flyback-based battery charging applications.…”

Section: Introductionmentioning

confidence: 99%

“…In [24], both PIs are tuned by using frequency response to guarantee a desired phase margin and crossover frequency; while the other two papers do not include a design procedure for the PIs [26] or do not provide clear information of the controller structure [25]. Some authors use one PI [6,20,27] or one two-poles two-zeros compensator [19,30] to regulate the flyback output voltage. On the one hand, the PI controller proposed in [27] is tuned by trial and error using different values of the proportional and integral gains; whereas the PIs introduced in [6,20] do not include a design procedure.…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, the PI controller proposed in [27] is tuned by trial and error using different values of the proportional and integral gains; whereas the PIs introduced in [6,20] do not include a design procedure. On the other hand, the compensators introduced in [19,30] use frequency response to tune the controller parameters; nonetheless [30], textcolorblackthey do not provide details about the controller design criteria.…”

Section: Introductionmentioning

confidence: 99%

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Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

2021

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Devices connected to microgrids require safe conditions during their connection, disconnection and operation. The required safety is achieved through the design and control of the converters that interface elements with the microgrid. Therefore, the design of both power and control stages of a battery charger/discharger based on a flyback is proposed in this paper. First, the structure of a battery charger/discharger is proposed, including the battery, the flyback, the DC bus, and the control scheme. Then, three models to represent the battery charger/discharger are developed in this work; a switched model, an averaged model, and a steady-state model, which are used to obtain the static and dynamic behavior of the system, and also to obtain the design equations. Based on those models, a sliding-mode controller is designed, which includes the adaptive calculation of one parameter. Subsequently, a procedure to select the flyback HFT, the output capacitor, and the Kv parameter based on operation requirements of the battery charger/discharger is presented in detail. Five tests developed in PSIM demonstrate the global stability of the system, the correct design of the circuit and controller parameters, the satisfactory regulation of the bus voltage, and the correct operation of the system for charge, discharge and stand-by conditions. Furthermore, a contrast with a classical PI structure confirms the performance of the proposed sliding-mode controller.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

2021

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Double Adaptive PI-Structure for Regulating a Microgrid DC Bus Using a Flyback-Based Battery Charger/Discharger Converter

2022

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DC microgrids are composed of loads, renewable sources, and storage devices that require control and protection to operate safely. The flyback converter is an alternative to connect paralleled batteries with nominal voltage DC buses; however, until now, complex controllers have been proposed, making difficult their implementation. On the other hand, when the voltage of a DC microgrid is not properly controlled, the loads may be damaged due to the voltage outside of the safe range. Therefore, proposed in this paper are two adaptive PI-structures to control a battery charger based on a flyback converter to be used in DC microgrids. The first adaptive current controller regulates the magnetizing current for stabilizing the system, and the second adaptive voltage controller regulates the voltage of the DC bus to protect the elements of the microgrid. The methodology to design the adaptive parameters of the PI-structures is developed as follows: first, the power stage of the flyback converter is introduced to derive a control-oriented model. The battery and the DC bus of the microgrid, which are interfaced by the flyback converter, are represented with widely accepted approaches. The second step is focused on modeling the system. The flyback converter, which includes a capacitance to model the DC microgrid, is represented by a dynamic model. The differential equations are averaged, and several transfer functions of the main variables are obtained. In the third step, the transfer functions are used to design the PI adaptive current controller and the PI adaptive voltage controller. In the last step, several recommendations are made to implement the power and control stages in low-cost hardware. An application example with realistic parameters is carried out in PSIM to validate the controller loops design. A battery of 12 V is connected to a DC microgrid of 48 V through a flyback converter with a switching frequency of 50 kHz. The settling time and deviation of the DC microgrid voltage, after a perturbation, are 0.845 ms and 2.04 V respectively, while the maximum values are adjusted to be 1 ms and 2.4 V. The simulation results validate the proposed procedure and the effectiveness of the PI-structures in regulating the magnetizing current and the DC bus voltage.

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Sliding-Mode Control of Bidirectional Flyback Converters with Bus Voltage Regulation for Battery Interface

2022

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Energy storage systems are essential for multiple applications like renewable energy systems, electric vehicles, microgrids, among others. Those systems are responsible of regulating the dc bus voltage using charging-discharging systems which are mainly formed by a power converter and a control system. This work focuses on the control system of a flyback converter. A detailed design procedure of an adaptive sliding-mode controller (SMC) and its parameters is presented. The proposed procedure was validated through simulations which allow to confirm its good performance in terms of global stability providing the desired dynamic of the dc bus voltage regulation.

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A simplified control scheme for electric vehicle-power grid circuit with DC distribution and battery storage systems

Cited by 3 publications

References 9 publications

Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

Double Adaptive PI-Structure for Regulating a Microgrid DC Bus Using a Flyback-Based Battery Charger/Discharger Converter

Sliding-Mode Control of Bidirectional Flyback Converters with Bus Voltage Regulation for Battery Interface

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