International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
A Modern Technique of Bidirectional DC-DC Converter for Deduction in Leakage Current Prakash Narayan Verma1, Kumar Goswami2, Anil Kurrey3 1Department
of Electrical Engineering, MANIT, Bhopal, MP, India of ECE, MATS University, Raipur, CG, India 3Department of ECE, IIIT Allahabad, UP, India ---------------------------------------------------------------------***-------------------------------------------------------------------2Departmetn
ABSTRACT-This paper propose modified D.A.B. topology in which a tuned L-C-L (Inductor-Capacitor-Inductor) Network. This method proposes a topology in which number of switches operating at a time is reduced by making use of the breaker circuit and hence switching losses are reduced modified topology is investigated under simulated environment by using SIMULINK. Further this topology proposes a way to reduce leakage current by adjusting the gain of D.A.B. Results obtained shows reduction in switching losses as well as leakage current of D.A.B. , Results indicates that the finally leakage current get reduced after Appling this proposed method by using the different kind of controller to control the pulses of the semiconductor switches. Key Words- DC-DC Converter, ANN, PID controller, D.A.B. converter, L-C-L passive resonant converter, Breaker.
1. INTRODUCTION In recent time the world is phase the problem of generation of electricity, recently the most of the energy can be depends on the conventional energy sources like petrol, diesel, gases and the also nuclear. But this type of energy can be limited in nature and after some time the level is very high so that the consumption of the energy is very high. But the generation of the electricity can be also be developed by the external source which is also called a natural energy like solar energy, wind energy, bio diesel, ocean energy and geothermal energy source[1], these type of energy is nonconventional energy sources and these energy can be very eco-friendly in nature But this type of energy is variable in nature so that developing source and the load generated mismatching. These mismatching is compulsory to reduce because of if it is not reduced then the stability of the system is getting decrease. So bidirectional process is best one for the improved the stability of the system and it developed the interface between the power grid to electrical vehicle system. So energy transfer is easy for this type of system[2-5]. Different kind of converter is applicable for the vehicle to grid system, but the dual active bridge DC-DC converter is most important and the most preferable D.A.B. converter. The most important quality of the dual active bridge converter is that its provides a isolation circuit between then and using small number of components at the time of conversion and also its improve the high power transfer or operation [6] -[7]. The other use of the dual active bridge is that it can be used for wide range voltage level, and if we used the these type of converter then we can operated with both of the mode as voltage decrement mode or also called a Buck mode and the Voltage increment mode also called the Boost mode, so that its operated at both of the mode. In conventional converter D.A.B. converter is using the single phase shift operation [8]. The main drawback of the conventional dual active bridge topology is that it takes more reactive current and the current is the responsible quantity for generation of the losses in the circuit so that the reactive current is also generated the conduction loss. For compensation this reactive current can be reduced by the large dc-link capacitor for minimizing the value of current [9]-[10]. And in the conventional D.A.B. technology the reactive current can be reduced by different kind of techniques like using by the pulse width modulation techniques or also by the zero voltage switching(ZVS) or provided by the different type of signal to the semiconductor switches like trapezoidal or triangular signal to minimizing the reactive current and reduction of conduction losses of the circuit[12], for reduced the level of current in the dual active bridge it is the required condition to achieving zero current switching in some of the switches[13] , [14], the level of reactive power can be also reduced by the to get equal pulse width modulation in each bridges[11], for minimization of the reactive power and root mean square value and peak value of the current can be reduction is possible by the controlling the switching condition[10] , for this system as compared to the dual phase shift control compare to pulse width modulation is used. Because of the converter efficiency is higher if we used the different signal using to operate the switches as compare to phase shift operation between the bridges. In traditional mostly pulse width modulation techniques is used for the operated the switches but if the switches can be operated smooth and if want to reduced the level of reactive current of the circuit or minimizing the conduction
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