A5029924246- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Silicon Carbide Semiconductor Technologies
- Microgrid Control and Optimization
- Induction Heating and Inverter Technology
- Analog and Mixed-Signal Circuit Design
- Frequency Control in Power Systems
- Power Systems and Renewable Energy
- Sensor Technology and Measurement Systems
- Wireless Power Transfer Systems
- Magneto-Optical Properties and Applications
- HVDC Systems and Fault Protection
- Islanding Detection in Power Systems
- Electric Power Systems and Control
- Advanced Battery Technologies Research
- High-Voltage Power Transmission Systems
Shanghai Jiao Tong University
2024
Central South University
2022-2024
In this article, a quasi-two-stage buck-DAB (QBDAB) converter is proposed for improving the performance of conventional dual active bridge (DAB) solution under wide voltage range. For QBDAB converter, DAB can always work matching conditions range applications, and gain adjusted through added front-end circuit. The circuit similar to buck while only part transmission power flows circuit, which could also reduce burden achieving ZVS Therefore, compared with traditional two-stage solution,...
Input-series output-parallel (ISOP) connected dual-active-bridge (DAB) converters allow the use for occasions requiring high input voltage and galvanic isolation with bidirectional power capability. However, when DAB are ISOP connected, traditional analysis without consideration of dead time cannot effectively explain reason why converter system is stable under common phase shift control (CPSC) parameters mismatched. In this article, it first revealed that stability ratio can be ensured by...
In this letter, a switch-multiplexed quasi-two-stage buck-dual-active-bridge (DAB) (SMBDAB) and its modulation strategy are proposed. Under the buck-DAB architecture, one bridge of primary side proposed converter is multiplexed as both buck circuit DAB to reduce power switches. addition, with voltage-matching modulation, multiplexing still ensures that voltages on sides leakage inductor always matched when voltage gain changes, thus, zero-voltage switching (ZVS) all switches can be achieved....
DC-link voltage pulsation is a technical challenge for grid-connected three-phase source rectifiers (VSRs) under unbalanced grids. To suppress ripples arising from grids, frequency-divided resistance-emulating control strategy proposed in this paper. According to the idea, loop consists of two parts: one dedicated regulating average and other focused on suppressing pulsating voltage. The inner synchronized based approach. offers following advantages: 1) grid sensors are eliminated; 2)...
An integrated Buck-LC converter for a wide voltage range is proposed in this paper based on quasi-two-stage structure. In the (IQBLC) converter, LC resonant stage under DCX mode and Buck can achieve regulation. The buck into stage, which reduce number of switches. inductor only transfers part output power benefits efficiency improvement ZVS achievement. Different working modes modulation strategies are presented IQBLC to further extend gain. soft switching all switches be realized different...
Under three-phase unbalanced grid, a double-line frequency fluctuation component is contained in the AC-side active power of inverter. To eliminate this component, paper new mitigation strategy developed on basis conventional virtual phase-current regulation (VPCR) with fewer control parameters. The improved VPCR revealed was analyzed comparison theory under identical voltage drop scenarios. An equivalent governance outcome ensured by an method. address absence parameter configuration...
In this paper, an integrated Quasi single-stage Buck-DAB (QSBDAB) converter is proposed to ahieve voltage gain regulation with high performance. the QSBDAB a Buck-like regulator unit constructed by adding auxiliary inductor and capacitor. With voltage-matched modulation unit, DAB can always work under conditions that voltages of both sides leakage matched when input or output varies. Thus, ZVS be achieved all switches different loads. Compared traditional two stage converter, needs less...
Abstract For the two-stage bidirectional AC-DC converter applied to vehicle-to-grid (V2G), this paper studies modulation strategy and topology of dual active bridge (DAB) in DC-DC stage. Aiming at problem large circulating current due fixed internal phase shift under traditional extended (EPS) control, modified EPS by deciding whether is generated primary or secondary side based on voltage gain, which realizes high-efficiency power transfer wide gain. To realize full load range zero...
A modified two-stage buck-DAB (MBDAB) converter is proposed to improve the performance of traditional (TSBDAB) converter. In MBDAB converter, DAB can work with fixed voltage gain and voltage-matched condition under a wide input range. The adjusted through added front-end stage, which similar buck Compared TSBDAB only part transmitted power flows so loss stage burden zero-voltage switching (ZVS) be reduced. Detailed analysis working principle, partial characteristics, full-load ZVS range...
This paper proposes a bidirectional single-stage resonant converter with the center-aligned midpoint voltages modulation (CMVM) method for series battery formation power supply system to meet tight requirements of output voltage variation from zero maximum voltage, transfer and high current. The proposed consists two (SRC) submodules input-series-output-parallel (ISOP) structure reduce device stress under condition input low current output. With CMVM method, ultra-wide range can be achieved...