Modified modulation scheme of the buck-boost voltage source inverter for bidirectional power flow capability

Author(s):  
Ahmed Abdelhakim ◽  
Paolo Mattavelli ◽  
Giorgio Spiazzi
Author(s):  
Diogo Marinho ◽  
Miguel Chaves ◽  
Paulo Gambôa ◽  
José Lopes

Abstract The increasing use of electrical vehicles aroused the problem of batteries charging and the consequent interface with the power grid. Commercial charging solutions are mostly based on unidirectional power flow converters; however, bidirectional power flow converters are an interesting solution when considering smart microgrid applications, with benefits in efficient energy use. In this context, the paper presents a bidirectional power flow converter for grid-to-vehicle (G2V) or vehicle-to-grid (V2G) applications. The conversion system is based on a three-phase voltage source inverter (VSI), which assures the grid connection with a unitary power factor. The direct current (DC) bus of the voltage source inverter is connected to a DC/DC converter that controls the battery power flow. This conversion system can operate in G2V mode when charging the battery or in V2G mode when working as an energy storage system and the power flow is from the battery to the power grid. The conversion system model is presented as well as the control strategy proposed. Simulation and experimental results showing voltages and currents in the circuit are also presented.


2014 ◽  
Vol 698 ◽  
pp. 150-154 ◽  
Author(s):  
A.A. Radionov ◽  
A.S. Maklakov ◽  
E.A. Karyakina

This paper addresses the issue of functional possibilities of reversible electric drive based on active front end rectifier and voltage source inverter from the point of view of energy saving. This paper will review all theoretical capabilities of reactive power compensation in the supply mains by the active front end rectifiers. The reactive power consumption or generation can be created out by using of active front end converters which connect the electric drive with supply mains. Active front end rectifiers can be actively used in operation of supply mains of enterprise as they are able to provide controlled power factor and bidirectional power flow. The studies by mathematical modeling in the Matlab/Simulink program were carried out. It was established that the controlling of power factor of active front end rectifier can be used for reactive power compensation in supply mains. The huge prospects of energy-saving reversible electric drive integration to the Smart Grid have been determined as it is able to provide high power and capabilities of the controlling reactive power flow by means of active front end rectifier. It can reduce a share of the consumption reactive power from a substation and to improve the power quality.


This Paper proposes a Novel and Modified Voltage Oriented Control (M-VOC) strategy of an Active Front-End (AFE) Rectifier that can give unity power factor at input side and regulated DC voltage at output side with reversible/bidirectional power flow. The proposed rectifier with M-VOC can find its place in applications like Wind energy conversion systems, DC load for electronic equipment, and adjustable AC drives. Simulation Analysis is done on this M-VOC strategy for an Active Front-End (AFE) Rectifier on MATLAB/ Simulink platform with the verification on the validity of the proposed system. The proposed Rectifier with M-VOC strategy gives good transient/dynamic response for the variations of load at output side. It also gives a pure sinusoidal input current with the elimination of harmonics so that this proposed Rectifier can be used in the case of back to back 2/3 level voltage source converters of wind energy systems that supports bidirectional power flow.


Author(s):  
Ferdian Ronilaya ◽  
Mahrus Hapidi ◽  
Sapto Wibowo ◽  
Ratna Ika Putri ◽  
Afifah Zuhroh ◽  
...  

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