Effective Magnetic Component Design of Three-Phase Dual-Active-Bridge Converter for LVDC Distribution System

2021 ◽  
Vol 68 (3) ◽  
pp. 1828-1840
Author(s):  
Hyun-Jun Choi ◽  
Bong-Gyo Seo ◽  
Myung-Hyo Ryu ◽  
Young-Pyo Cho ◽  
Jee-Hoon Jung
Keyword(s):  
Distribution System ◽  
Magnetic Component ◽  
Dual Active Bridge ◽  
Component Design ◽  
Three Phase

scholarly journals Practical Controller Design of Three-Phase Dual Active Bridge Converter for Low Voltage DC Distribution System

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2101
Author(s):  
Hyun-jun Choi ◽  
Won-bin Lee ◽  
Jee-hoon Jung
Keyword(s):  
Distribution System ◽  
Controller Design ◽  
Low Voltage ◽  
Frequency Noise ◽  
Small Signal ◽  
Signal Model ◽  
Dual Active Bridge ◽  
Small Signal Model ◽  
Three Phase ◽  
Output Filter

In a low voltage DC (LVDC) distribution system, isolated bi-directional DC-DC converters are key devices to control power flows. A three-phase dual-active-bridge (3P-DAB) converter is one of the suitable candidates due to inherent soft-switching capability, low conduction loss, and high-power density. However, the 3P-DAB converter requires a well-designed controller due to the influence of the equivalent series resistance (ESR) of an output filter capacitor, degrading the performance of the 3P-DAB converter in terms of high-frequency noise. Unfortunately, there is little research that considers the practical design methodology of the 3P-DAB converter’s controller because of its complexity. In this paper, the influence of the ESR on the 3P-DAB converter is presented. Additionally, the generalized average small-signal model (SSM) of the 3P-DAB converter including the ESR of the capacitive output filter is presented. Based on this model, an extended small-signal model and appropriate controller design guide, and performance comparison are presented based on the frequency domain analysis. Finally, experimental results verify the validity of the proposed controller using a 25 kW prototype 3P-DAB converter.

scholarly journals Analysis and Design of Three-Phase Buck Rectifier Employing UPS to Supply High Reliable DC Power

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1704 ◽  
Author(s):  
Jun-Young Lee ◽  
Kyung-Wook Heo ◽  
Kyu-Tae Kim ◽  
Jee-Hoon Jung
Keyword(s):  
Distribution System ◽  
Output Voltage ◽  
High Reliability ◽  
Voltage Level ◽  
Analysis And Design ◽  
Dual Active Bridge ◽  
Dc Distribution ◽  
Thyristor Switch ◽  
Three Phase ◽  
Uninterruptible Power

In the DC distribution system, to step down the DC voltage level from the AC grid voltage, the conventional topologies require multiple power conversion stages and bulky line-frequency transformers, which degrade their power density and cost-effectiveness. In addition, the conventional topologies suffer from a shoot-through problem resulting in their low system reliability. In this paper, to overcome the above issues, systematic design approaches of a three-phase buck rectifier with an uninterruptible power supply (UPS) and a protection algorithm are proposed to obtain the high reliability of the DC distribution system, which can deal with fault conditions and can regulate the output voltage level. It only requires a single stage of the three-phase buck rectifier. Also, a thyristor switch is added without any commutation circuits to cut off the output from the fault circuit. The shoot-through faults do not occur in the buck rectifier, leading to high reliability. A dual-active-bridge (DAB) DC-DC converter is applied as the UPS to supply the electric power from the battery when the buck rectifier is shut down under the fault conditions. Finally, the protection algorithm is proposed to detect the fault conditions and to regulate the output voltage level.

Three-phase to Single-phase Matrix Converter for Improvement of Three-phase Voltage Unbalance in Distribution System

2015 ◽  
Vol 135 (3) ◽  
pp. 168-180 ◽  
Author(s):  
Ryota Mizutani ◽  
Hirotaka Koizumi ◽  
Kentaro Hirose ◽  
Kazunari Ishibashi
Keyword(s):  
Distribution System ◽  
Single Phase ◽  
Matrix Converter ◽  
Phase Voltage ◽  
Voltage Unbalance ◽  
Three Phase

scholarly journals Attenuation of DC-Link Pulsation of a Four-Wire Inverter during Phase Unbalanced Current Operation

2021 ◽  
Vol 11 (3) ◽  
pp. 1322
Author(s):  
Dariusz Zieliński ◽  
Karol Fatyga
Keyword(s):  
Energy Storage ◽  
Control Algorithm ◽  
Reactive Power ◽  
Lithium Ion ◽  
Power Converter ◽  
Dual Active Bridge ◽  
Three Phase ◽  
Ion Storage ◽  
Energy Store ◽  
Phase Converter

This paper proposes a control algorithm for a hybrid power electronic AC/DC converter for prosumer applications operating under deep phase current asymmetry. The proposed system allows independent control of active and reactive power for each phase of the power converter without current pulsation on the DC link connected to an energy store. The system and its algorithm are based on a three-phase converter in four-wire topology (AC/DC 3p-4w) with two dual-active bridge (DC/DC) converters, interfaced with a supercapacitor and an energy storage. The control algorithm tests were carried out in a Hardware in the Loop environment. Obtained results indicate that operation with deep unbalances and powers of opposite signs in individual phases leads to current oscillations in the DC link. This phenomenon significantly limits energy storage utilization due to safety and durability reasons. The proposed algorithm significantly reduces the level of pulsation in the DC link which increases safety and reduces strain on lithium-ion storage technology, enabling their application in four-wire converter applications.

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