Triple-Phase-Shift Control Strategy for Full-Bridge Three-Level (FBTL) DC/DC Converter

Liu, Dong; Wang, Yan‐Bo; Deng, Fujin; Chen, Zhe

doi:10.1109/ecce.2018.8557786

Cited by 4 publications

(3 citation statements)

References 15 publications

(18 reference statements)

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“…The power throughput of a DAB converter is controlled by the voltage across its transformer leakage inductance. For modulation and control of a DAB converter, a number of modulation strategies have been proposed in the past [27,28,29,30,31,32,33,11]. Among them, the single phase-shift (SPS) control based modulation is the most widely used one.…”

Section: Literature Review Pertinent To Thesis Objectivesmentioning

confidence: 99%

An Isolated Soft-Switched DC-DC Converter For Interconnection Of Medium- And Low-Voltage DC Grids

Saeedifard¹

2021

Preprint

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As the electric power grid increasingly hosts energy storage devices, renewable energy resources, plug-in hybrid and electric vehicles, and data centers, it is expected to benefit in the future from a multi-layer DC structure meshed within its legacy AC architecture. As such a multi-layer grid structure evolves, interconnection of DC grids with different voltage levels will become necessary. For such interconnections and for power-flow control, efficient isolated DC-DC converters are a key enabling technology. This thesis thus presents the results of an in-depth investigation into the operation, modulation, control, and performance assessment of a particular DC-DC converter configuration. The proposed DC-DC converter, which is based upon a hybrid combination of the conventional dual-active-bridge topology and the modular multi-level converter (MMC) configuration, is a potential candidate topology for interconnection of medium- and low-voltage DC grids. The thesis first introduces the circuit topology and presents the basics of operation and governing steady-state equations for the converter. Then, based on the developed mathematical model, it identifies a suitable modulation strategy for the converter bridges and submodules, as well as strategies for the regulation of the MMC submodule capacitor voltages and soft switching of the constituent semiconductor devices. The proposed converter topology offers significant benefits including galvanic isolation, utilization of the transformer’s leakage inductance, soft switching for high-frequency operation, and bidirectional power flow capability. The validity of the mathematical model, effectiveness of the proposed modulation and control strategies, and the realization of soft switching are verified through off-line simulation of a detailed circuit model as well as experiments conducted on a 1-kW experimental setup.

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Section: Literature Review Pertinent To Thesis Objectivesmentioning

confidence: 99%

An Isolated Soft-Switched DC-DC Converter For Interconnection Of Medium- And Low-Voltage DC Grids

Saeedifard¹

2021

Preprint

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“…Besides, there is another kind of control strategy that does not rely on the PID controller. For example, a three-phase phase-shift (TPS) control strategy is proposed for the full-bridge three-level (FBTL) DC/DC converter [10], a dual phase-shift control method widely used in the DC-DC converter [11,12], and active disturbance rejection control (ADRC) technology which has been applied to the field of switching power supply [13,14]. e ADRC control strategy is similar to the control strategy used in this paper.…”

Section: Introductionmentioning

confidence: 99%

Research on a Self-Coupling PID Control Strategy for a ZVS Phase-Shift Full-Bridge Converter

Sun

Liu

Zhang

et al. 2021

Mathematical Problems in Engineering

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As an important part of the high-frequency switching power supply, the control accuracy of the phase-shift full-bridge converter directly affects the efficiency of the switching power supply. To improve the stability and antidisturbance ability of phase-shift control systems, this article presents a dual closed-loop control system based on Self-Coupling PID (SC-PID) control and applies the SC-PID control strategy to the voltage control of the phase-shift full-bridge converter. To begin with, in response to the contradiction of traditional PID, SC-PID breaks the limitation of PID control by introducing a new control idea instead of weighted summation of each gain, which fundamentally solves the contradiction between overshoot and rapidity. Then, using the dimension attributes between gains to develop new tuning rules to solve the system load disturbance, output voltage deviation from the reference value, and other problems, the purpose is to ensure the stability of the output voltage and improve the control effect. At the same time, the stability of the whole control system is analyzed in the complex frequency domain. Finally, with the same main circuit and parameters, three types of controllers are built separately, and using MATLAB for simulation comparison, the simulation results show that the control system based on SC-PID has better steady-state accuracy, faster response, and better robustness, which proves the feasibility of the SC-PID control idea.

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“…In this paper, a triple-phase-shift (TPS) modulation strategy is proposed for the diode-clamped FB TL-IDC as an extension of our previous work [29]. High voltage changes with the value of the full input voltage on the transformer occur under the conventional strategies, but the proposed strategy can maximum value of these voltage changes at only half of the input voltage (V in /2).…”

Section: Introductionmentioning

confidence: 99%

Triple-Phase-Shift Modulation Strategy for Diode-Clamped Full-Bridge Three-Level Isolated DC/DC Converter

Liu

Deng

et al. 2020

IEEE Access

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This work was supported by the ForsKEL and EUDP Project Voltage control and protection for a grid towards 100% power electronics and cable network (COPE) under Grant 64017-0047. ABSTRACT A triple-phase-shift (TPS) modulation strategy with reduced transformer's voltage stress is proposed in this paper for the diode-clamped full-bridge (FB) three-level isolated DC/DC converter. The proposed strategy can keep the transformer's maximum voltage changes (V) at only half of the input voltage (V in /2) by employing three phase-shift delays. Consequently, comparing with the conventional strategies, the merits of the proposed strategy include: 1) reducing the voltage change rate (dv/dt) on the transformer and 2) improving the transformer's voltage harmonics due to the merit of the multi-level voltage. Additionally, the proposed strategy has two operating modes with zero-voltage switching (ZVS) for fulfilling the wide input voltage range. Finally, the proposed strategy is verified by both simulation and experimental results. INDEX TERMS DC/DC converter, full-bridge three-level, phase-shift control, wide input voltage range, zero-voltage switching (ZVS).

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Triple-Phase-Shift Control Strategy for Full-Bridge Three-Level (FBTL) DC/DC Converter

Cited by 4 publications

References 15 publications

An Isolated Soft-Switched DC-DC Converter For Interconnection Of Medium- And Low-Voltage DC Grids

An Isolated Soft-Switched DC-DC Converter For Interconnection Of Medium- And Low-Voltage DC Grids

Research on a Self-Coupling PID Control Strategy for a ZVS Phase-Shift Full-Bridge Converter

Triple-Phase-Shift Modulation Strategy for Diode-Clamped Full-Bridge Three-Level Isolated DC/DC Converter

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