Industrial Electronics
Nasim Bagheri; Hasan Alipour; Leila Mohammadian; Jamal Beiza; Mohsen Ebadpour
Abstract
This paper proposes an integrated bidirectional multiport DC-DC converter for battery charging of plug-in electric vehicles, which is able to integrate the photovoltaic (PV) system, traction batteries, and the AC grid. The presented converter is more reliable than the conventional topologies because ...
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This paper proposes an integrated bidirectional multiport DC-DC converter for battery charging of plug-in electric vehicles, which is able to integrate the photovoltaic (PV) system, traction batteries, and the AC grid. The presented converter is more reliable than the conventional topologies because both PV panels and the grid can simultaneously or separately deliver power to the high voltage batteries. In addition, the topology is bidirectional can transfer power from batteries to the AC grid by employing half-bridge CLLC converter with fewer switches. Moreover, a unified controller along with optimum maximum power point tracking (MPPT) algorithm is utilized for control of the converter. The converter topology, control system, and operating scenarios are analyzed by using state space modeling. To evaluate the whole system performance, MATLAB/Simulink software is used to test the converter’s operation during different conditions. The simulation results depict that the proposed converter is not only able to control the batteries charge and discharge according to the state of the charge, but also maintain the DC-link voltage of the grid side to be in constant level.
Industrial Electronics
Gholamreza Mohebalizadeh; Hasan Alipour; Leila Mohammadian; Mehran Sabahi
Abstract
To overcome the low output voltage of Renewable Energy Sources (RESs) such as photovoltaic arrays (PVAs) and fuel cells, a new multi-input DC/DC converter is presented in this paper. This converter is based on a combination of modified quadratic buck-boost converters, Switched Inductors (SIs), and Voltage ...
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To overcome the low output voltage of Renewable Energy Sources (RESs) such as photovoltaic arrays (PVAs) and fuel cells, a new multi-input DC/DC converter is presented in this paper. This converter is based on a combination of modified quadratic buck-boost converters, Switched Inductors (SIs), and Voltage Multiplier Modules (VMMs). The high voltage gain can be achieved by adjusting the duty cycle and turn ratio of the coupled inductor of VMM. This structure inherits all the advantages of the SEPIC converter and using a bidirectional input port (in which an Energy Storage System (ESS) can be connected) and several unidirectional input ports. The load power can be flexibly divided among various power sources. Due to the buck-boost characteristics of the presented converter, it is suitable to charge-discharge the ESS. A Coupled Inductor (CI) is used to couple energy from input to the output equipped with the VMM. Moreover, the use of SI reduces the rise time and ripple of the input current. The stability of the proposed converter against momentary changes of VPV and Ro is the main advantage of this converter. Moreover, considering a secondary ESS as Vi instead of PV allows the converter to be active 24 hours a day. In this converter, the use of two ESSs guarantees the supply of the required output power. In addition, two bidirectional input ports prepare the ESSs charging and discharging capabilities. To verify the analysis and feasibilities of the proposed converter, simulation results are presented.
Industrial Electronics
Gholamreza Mohebalizadeh; Hasan Alipour; Leila Mohammadian; Mehran Sabahi
Abstract
Abstract- An Electric Vehicle Battery Charger (EVBC) faces serious challenges as continuous charging voltage ripple, charging speed, input voltage level variations, and its ability to adapt to the Battery State of Charge (BSOC). A proper controller has an important role to prepare all the mentioned above. ...
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Abstract- An Electric Vehicle Battery Charger (EVBC) faces serious challenges as continuous charging voltage ripple, charging speed, input voltage level variations, and its ability to adapt to the Battery State of Charge (BSOC). A proper controller has an important role to prepare all the mentioned above. A nonlinear one such as sliding mode controller (SMC) is eminently suitable for solving these issues. Therefore, an improved SMC, to take control of a DC/DC boost converter as an EVBC, is presented in this work. This proposed controller has a more robust structure in the input voltage significant variations than the other SMCs. Therefore, this provides the capability to apply various kinds of power supplies as input voltages in EVBC stations. The EVBC power and battery voltage/capacity are assumed 14 kW and 400V/60Ah, respectively in this converter. The simulation results in Matlab Simulink verify the controller’s high performance compared with the other SMCs.