A Fast DC-Bus Voltage Controller for Bidirectional SinglePhase AC/DC Converters
ABSTRACT:
This project presents a new dc-bus voltage control technique for single-phase
bidirectional ac/dc converters. The proposed controller is able to significantly
improve the transient response of the dc-bus voltage control loop and provide a
robust and reliable closed-loop control system. In the proposed approach, the dc
value of the dc-bus voltage is precisely estimated through a specific adaptive filter.
The structure of the proposed filter provides a very fast and robust estimation for
the dc value of the dc-bus voltage. In particular, the proposed dc-extraction
technique is able to precisely estimate the dc value in presence of doublefrequency ripple mounted on top of the dc-bus voltage in single-phase ac/dc
converters.
CIRCUIT DIAGRAM
EXISTING SYSTEM:
The bidirectional ac/dc converter can effectively control the power flow between
the grid and the traction battery, as well as performing other ancillary services.
According to this figure, the bidirectional ac/dc converter is the interface between
the DG and the traction battery. The control of the ac/dc converter is of great
importance to the integration of the EV into a DG. The control system is
responsible for implementing power flow control, as well as other functions
required to support the DG. The focus of this paper is on the design and
implementation of the control system for a bidirectional ac/dc converter with
V2G/G2V capability.
PROPOSED SYSTEM:
The bidirectional ac/dc converter is able to provide power flow in both directions
between the grid and the vehicle. The bidirectional single-phase AC/DC converter.
This converter includes an active rectifier at the input stage and an isolated dual
active bridge converter at the output stage. There is an LCL filter at the input of the
active rectifier in order to eliminate the high-frequency harmonics. An intermediate
dc bus is in between the two stages in order to alternate the power ripple.
TOOLS AND SOFTWARE USED:
 MP LAB
 ORCAD/PSPICE
 MATLAB/SIMULINK
OUTPUT:
 HARDWARE
 SIMULATION
REFERENCE:
Majid Pahlevani, Senior Member, IEEE, and Praveen Jain, Fellow, IEEE, “A Fast
DC-Bus Voltage Controller for Bidirectional Single-Phase AC/DC Converters”,
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 30, NO. 8,
AUGUST 2015.