Design and Analysis of off-board PV-Grid Adjustable Charger for Electric Vehicle Battery

The electric vehicles (EVs) are emerging as general-purpose transportation, due to various shortcomings of traditional vehicles. The EVs will become ubiquitous only if its charging infrastructure is abundant and efficient. Typically, a module of Li-ion battery applied in EVs uses 4 – 6 cells. These modules are connected in series-parallel combination to obtain the threshold power output. The power for the charging battery is delivered by the PV – grid topology. The solar and grid circuit uses a boost converter to create a dc bus. As the system uses boost converter for both PV and grid circuit, therefore, charging profile can be adjusted by altering dc bus voltage. The battery used in different EVs has a different configuration. The charger for EVs should be adjustable, as the traditional charger with fixed output will not charge the battery efficiently and results in reduced battery life. Therefore, a charger providing a fixed output will not serve the public demand. Hence, an adjustable charger has been proposed in this paper. The voltage and current profile of the charger can be adjusted according to the requirements of the EV battery.

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Dual-Mode Photovoltaic Bidirectional Inverter Operation for Seamless Power Transfer to DC and AC Loads with the Grid Interface

International Journal of Photoenergy ◽

10.1155/2019/8498435 ◽

2019 ◽

Vol 2019 ◽

pp. 1-14

Author(s):

M. Srikanth ◽

B. Pakkiraiah ◽

Poonam Upadhyay ◽

S. Tara Kalyani

Keyword(s):

Distribution System ◽

Output Voltage ◽

Power Flow ◽

Boost Converter ◽

Power Transfer ◽

Dual Mode ◽

Point Tracking ◽

Dc Bus ◽

Bus Voltage ◽

Power Point

This paper develops the photovoltaic bidirectional inverter (BI) operated in dual mode for the seamless power transfer to DC and AC loads. Normal photovoltaic (PV) output voltage is fed to boost converter, but in space application, boost converter is not so preferable. To overcome this, buck and boost converters are proposed in this paper. Duty cycle to this converter is provided with the help of the outcome of the maximum power point tracking (MPPT) controller. This can be implemented by using perturbation and observation method. The MPPT will operate the switch between buck and boost modes. When the output voltage of a PV array is close to the dc bus voltage, then the bidirectional inverter can fulfill both rectification and grid connected mode. To control the power flow between dc bus and ac grid, a dc distribution system is used to regulate the dc bus voltage to a convinced level. Moreover, the bidirectional inverter must fulfill grid connection (sell power) and rectification (buy power) with power factor correction (PFC) to control the power flow between dc bus and ac grid. The simulations and hardware experimental results of a 2.5 kVA circuit are presented to validate the performance of the proposed dual-mode seamless power transfer.

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Transient response of digital peak current mode boost converter for DC bus voltage compensation

2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA) ◽

10.1109/icrera.2016.7884448 ◽

2016 ◽

Cited By ~ 1

Author(s):

Yudai Furukawa ◽

Shintaro Nibu ◽

Ilhami Colak ◽

Haruhi Eto ◽

Fujio Kurokawa

Keyword(s):

Transient Response ◽

Current Mode ◽

Boost Converter ◽

Peak Current ◽

Voltage Compensation ◽

Dc Bus ◽

Bus Voltage

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An Optimal Control Strategy for DC Bus Voltage Regulation in Photovoltaic System with Battery Energy Storage

The Scientific World JOURNAL ◽

10.1155/2014/271087 ◽

2014 ◽

Vol 2014 ◽

pp. 1-16 ◽

Cited By ~ 7

Author(s):

Muhamad Zalani Daud ◽

Azah Mohamed ◽

M. A. Hannan

Keyword(s):

Energy Storage ◽

Optimization Technique ◽

Current Mode ◽

Voltage Regulation ◽

Boost Converter ◽

Pv System ◽

Battery Energy Storage ◽

Dc Bus ◽

Bus Voltage ◽

Battery Energy

This paper presents an evaluation of an optimal DC bus voltage regulation strategy for grid-connected photovoltaic (PV) system with battery energy storage (BES). The BES is connected to the PV system DC bus using a DC/DC buck-boost converter. The converter facilitates the BES power charge/discharge to compensate for the DC bus voltage deviation during severe disturbance conditions. In this way, the regulation of DC bus voltage of the PV/BES system can be enhanced as compared to the conventional regulation that is solely based on the voltage-sourced converter (VSC). For the grid side VSC (G-VSC), two control methods, namely, the voltage-mode and current-mode controls, are applied. For control parameter optimization, the simplex optimization technique is applied for the G-VSC voltage- and current-mode controls, including the BES DC/DC buck-boost converter controllers. A new set of optimized parameters are obtained for each of the power converters for comparison purposes. The PSCAD/EMTDC-based simulation case studies are presented to evaluate the performance of the proposed optimized control scheme in comparison to the conventional methods.

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Analysis of DC converters for wind generators

Facta universitatis - series Electronics and Energetics ◽

10.2298/fuee0902235l ◽

2009 ◽

Vol 22 (2) ◽

pp. 235-244 ◽

Cited By ~ 3

Author(s):

Vladimir Lazarov ◽

Daniel Roye ◽

Zahari Zarkov ◽

Dimitar Spirov

Keyword(s):

Boost Converter ◽

Variable Speed ◽

System Behavior ◽

Power Losses ◽

Wind Generator ◽

Wind Generators ◽

Dc Bus ◽

Bus Voltage

The present paper investigates the system behavior of a rectifier and a DC boost converter used in a wind generator with variable speed. In many cases a combination of diode rectifier and a DC boost converter is used as interface between the generator and the inverter in order to match the requirements for the DC bus voltage. Different models of the converters have been developed in Malab/Simulink and PSPICE environments. Comparison between the simulations and experiments is shown. The power losses are also discussed. .

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Non-linear controller for storage systems with regulated outputvoltage and safecurrent slew-rate for the battery

Revista UIS Ingenierías ◽

10.18273/revuin.v19n3-2020012 ◽

2020 ◽

Vol 19 (3) ◽

pp. 117-129

Author(s):

Carlos Andrés Ramos-Paja ◽

Juan David Bastidas-Rodríguez ◽

Daniel González-Montoya

Keyword(s):

Storage System ◽

Design Procedure ◽

Energy Storage System ◽

Boost Converter ◽

Slew Rate ◽

Hybrid Energy ◽

Hybrid Energy Storage ◽

Non Linear ◽

Dc Bus ◽

Bus Voltage

This paper proposes a non-linear control structure for a hybrid energy storage system with a series architecture, which regulates the voltage of a DC bus (output voltage) and ensures that the battery current fulfills the current slew-rate restriction. The proposed solution has two stages, in the first one, the battery is connected to a buck/boost converter that feeds an auxiliary capacitor. In the second stage, the auxiliary capacitor is connected to a DC bus through a second buck/boost converter. Both converters are regulated using cascaded control systems, where the inner loops are slidingmode controllers of the inductors’ current, and the outer loops in the first and second converter are designed to limit the slew-rate of the battery current and to regulate the dc bus voltage, respectively. The paper provides the design procedure for the controllers and validates its performance with simulation results for the power system operating in charging, discharging and stand-by modes.

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An optimized bidirectional buck–boost converter for DC bus voltage stabilization in new generation poloidal field power supply

Energy Reports ◽

10.1016/j.egyr.2021.11.016 ◽

2021 ◽

Author(s):

Tao Chen ◽

Peng Fu ◽

Xiaojiao Chen ◽

Sheng Dou ◽

Liansheng Huang ◽

...

Keyword(s):

Power Supply ◽

Boost Converter ◽

Poloidal Field ◽

Voltage Stabilization ◽

Dc Bus ◽

Bus Voltage ◽

New Generation

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MPPT of Wind Generation for DC Microgrid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.1802 ◽

2013 ◽

Vol 448-453 ◽

pp. 1802-1805 ◽

Cited By ~ 1

Author(s):

Yuan Sheng Xiong ◽

Su Xiang Qian ◽

Qing Song Liu ◽

Yan Zhan

Keyword(s):

Duty Cycle ◽

Output Voltage ◽

Maximum Output Power ◽

Boost Converter ◽

Wind Generation ◽

Maximum Output ◽

Output Current ◽

Dc Microgrid ◽

Dc Bus ◽

Bus Voltage

In order to maintain the maximum output power of the WGS (Wind generation system) for all wind speed conditions, a boost converter is used as the power interface between the WGS and DC microgrid. Traditional method is to directly measure the real-time output voltage and current of WGS by sensors. Considering the DC bus voltage is actually stable, the output voltage can be computed by the duty cycle of boost converter and the stable DC bus voltage. A MPPT method is proposed, which only measures the output current of WGS. The output scale power can be obtained by the output current and the duty cycle, and then the perturbation and observation method is executed. A number of voltage sensors and associated circuitry are cancelled. It reduces the interference and system cost and improves the system reliability. Simulation results with PSIM prove the validity of the proposed method.

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