Bidirectional dc to dc Converters: An Overview of Various Topologies, Switching Schemes and Control Techniques

Abstract

Bidirectional dc to dc converter is used as a key device for interfacing the storage devices between source and load in renewable energy system for continuous flow of power because the output of the renewable energy system fluctuates due to change in weather conditions. In electric vehicles also, bidirectional converter is used between energy source and motor for power supply from battery to motor. Thus, bidirectional dc to dc converters are getting more and more attention in academic research and in industrial applications. Bidirectional dc to dc converters work in both buck and boost mode and can manage the flow of power in both the direction between two dc sources and load by using specific switching scheme and phase shifted control strategy and hence generated excess energy can be stored in batteries/super capacitors. Therefore, the basic knowledge and classification of bidirectional dc to dc converters on the basis of galvanic isolation, the comparison between their voltage conversion ratio and output current ripple along with various topologies researched in recent years are presented in this paper. Finally, zero current and zero voltage soft switching schemes and phase shifted controlling techniques are also highlighted.

Short and open circuit faults study in the PV system inverter

“…To obtain the efficiency of the DC current and voltage converters into the AC current and voltage, we have modeled this inverter with the standard method given by the next equation. This model expresses the efficiency as a function of the input power P in [6], [21], [22].…”

Determination of Conducted EMI in SiC Based Dual Active Bridge Converter

“…Therefore, these converters are used in high power units such as hybrid vehicles, electric vehicles and micro grids. Dual half bridge and dual active bridge bidirectional converters are examples of the IBDCs [6]. In this study, a DAB-IBDC is examined because of its high efficiency and more detailed control.…”

Stability and Dynamic Response of Analog and Digital Control loops of Bidirectional buck-boost Converter for Renewable Energy Applications

“…The Bidirectional buck-boost converter(BBC) as power interface between main and auxiliary energy storage become key element [13]- [15].In many applications like Hybrid electric vehicles(HEVs),fuel cell electric vehicles(FCEVs), stand-alone PV power plants, automotive industries and so on, the bidirectional buck-boost converter plays very important role for efficient usage of power and to improve the stability and flexibility of the system. The best application of BBC is in electric vehicle where it captures the kinetic energy of motor and charging the battery during regenerative braking by reverse flow of energy as shown in fig.1 [19]- [23].Similarly there are some hybrid renewable energy system as shown in fig.2 where solar energy, wind energy etc. are environment dependent systems therefore fluctuation of output power and sudden change in load demand results in unreliable system .The solution for this issue is usage of storage system like battery with the help of BBC for power conditioning and smooth flow of power to the load.…”