A novel three-phase bidirectional DC-DC converter for UPS applications

Abosnina, Adel Ali; Moschopoulos, Gerry

doi:10.1109/apec.2018.8341216

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…Hence, BDC is designed to resolve the aforesaid problem [28]. It may deliver power in both directions and has numerous usages which include DC motor drives, ESS in RE systems [29,30], fuel cell-based energy systems [31], HEV [32] and UPS [33]. Table 1 provides the requirments for each applications where BDC can be used and accordingly type of BDC suitable for each application is provided.The main challenges of BDC for energy storage applications are given below.…”

Section: Need For Bdc and Essmentioning

confidence: 99%

A comparative analysis of non-isolated Bi-directional converters for energy storage applications

Nagabushanam,

Tewari,

Udumula

et al. 2024

Eng. Res. Express

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Bi-directional DC-DC converters are required for power flow regulation between storage devices and DC buses in renewable energy based distributed generation systems. The fundamental requirements of the BDC are simple structure, reduced switching components, a wide range of voltage gain, low voltage stress, high efficiency, and reduced size. There are different BDC topologies for different applications based on their requirements. Isolated BDC converters are large due to high-frequency transformers and hence used for static energy storage applications whereas non-isolated BDC is lightweight and suitable for dynamic applications like electric vehicles. This paper reviews and compares different non-isolated BDC topologies by carrying out theoretical analysis and validating them through simulation results. A comparative analysis is done to identify the most efficient topology for the distributed generation systems. Five 200W converters are simulated in MATLAB Simulink to validate their steady state performance.

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Section: Need For Bdc and Essmentioning

confidence: 99%

A comparative analysis of non-isolated Bi-directional converters for energy storage applications

Nagabushanam,

Tewari,

Udumula

et al. 2024

Eng. Res. Express

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“…Bidirectional DC-DC converters (BDCs) are used in a wide range of applications that require bidirectional power transmissions, such as electric vehicles (EVs), renewable energy systems, industrial systems, DC power distribution systems, aerospace power supplies, more electric aircraft (MEA) power supplies, uninterruptible power supplies (UPS), and fuel cell and battery energy storage systems (BESS) [1][2][3][4][5][6][7][8]. Tese types of high-power high gain BDCs are capable of achieving both DC voltage variation and electrical isolation.…”

Section: Introductionmentioning

confidence: 99%

An Improved Topology of Isolated Bidirectional Resonant DC-DC Converter Based on Wide Bandgap Transistors for Electric Vehicle Onboard Chargers

Shahed

Rashid

2023

International Transactions on Electrical Energy Systems

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This article proposes an improved topology for an isolated bidirectional resonant DC-DC converter for electric vehicle (EV) onboard chargers. As opposed to the conventional capacitor-inductor-inductor-inductor-capacitor (CLLLC) resonant converter, the proposed converter’s resonant circuit is composed of a capacitor-inductor-inductor-inductor (CLLL) structure, whose inductances, except the capacitor, can be fully integrated with the leakage and mutual inductances of the high-frequency transformer (HF). Therefore, this offers a smaller size, lower costs, minimal power loss, and eventually higher efficiency. Again, the proposed converter design is based on wide bandgap (WBG) transistor switches that operate at MHz-level switching frequency to achieve high power density, high efficiency, and high compactness. A discrete-time proportional integral derivative (PID) controller has been designed using the phase-shifted pulse width modulation (PSPWM) technique to assure closed-loop control of the proposed CLLL converter. The PID controller parameters have been optimized using both the genetic algorithm (GA) and particle swarm optimization (PSO) algorithm and a comparative analysis has been presented between the two algorithms. To achieve fast switching with very little switching loss, the converter is simulated with several wide bandgap (WBG) switching devices. A performance comparison with conventional Si-based switching devices is also provided. A precise power loss model of the semiconductor switches has been devised from the manufacturer’s datasheet to achieve a perfect thermal design for the converter. A 5 kW CLLL converter with an input range of 400–460 V direct current (DC) and an output range of 530–610 V DC, and a switching frequency of 1 MHz has been designed and investigated under various loading scenarios. Gallium nitride (GaN) switching device-based designs achieved the highest levels of efficiency among the switching devices. The efficiency of this device is 97.40 percent in charging mode and 96.67 percent in discharging mode.

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“…Various methods can be used to provide longer run time; however, diesel generators and batteries remain the most popular choice at the present time. In UPS systems, a DC-DC converter that often interfaces a bank of batteries is commonly employed [2,3]. The battery bank needs to be recharged at some point after supplying electricity during a grid voltage disruption or power outage; therefore, bidirectional power flow must be managed.…”

Section: Introductionmentioning

confidence: 99%

Double input DC-DC converter for highly flexible and reliable Battery Storage Systems

Benevieri,

Carbone,

Cosso

et al. 2023

E3S Web Conf.

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Battery storage systems are fundamental in UPS applications. UPSs are exploited when high reliability is required. A DC-DC converter is typically used to interface the battery to the inverter to match the different voltage levels. In normal operation, the battery of the UPS is not used and it intervenes only during grid blackout. However, the battery is subjected to deterioration and UPS intervention could fail. In medium and high power UPS, more battery modules are connected in series. If one battery is damaged, all the series is affected. To prevent this issue, a new double-input DC-DC converter is presented in this paper. The two DC sources can be controlled separately, resulting in a system reliability improvement. In addition, the damaged battery is not bypassed; hence the overall system performance can be maximized, since the deteriorated battery can provide energy at a limited rate. Additionally, the proposed converter allows batteries based on different technologies to be mixed together, achieving the best performances from each technology.

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A novel three-phase bidirectional DC-DC converter for UPS applications

Cited by 7 publications

References 19 publications

A comparative analysis of non-isolated Bi-directional converters for energy storage applications

A comparative analysis of non-isolated Bi-directional converters for energy storage applications

An Improved Topology of Isolated Bidirectional Resonant DC-DC Converter Based on Wide Bandgap Transistors for Electric Vehicle Onboard Chargers

Double input DC-DC converter for highly flexible and reliable Battery Storage Systems

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