A5011191579- Silicon Carbide Semiconductor Technologies
- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Microgrid Control and Optimization
- HVDC Systems and Fault Protection
- Electromagnetic Compatibility and Noise Suppression
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Battery Technologies Research
- Electrostatic Discharge in Electronics
- GaN-based semiconductor devices and materials
- Photovoltaic System Optimization Techniques
- Smart Grid Energy Management
- Induction Heating and Inverter Technology
- Islanding Detection in Power Systems
- High-Voltage Power Transmission Systems
- Wireless Power Transfer Systems
- RNA Research and Splicing
- Thin-Film Transistor Technologies
- Power Systems and Renewable Energy
- High voltage insulation and dielectric phenomena
- RNA modifications and cancer
- Silicon and Solar Cell Technologies
- Wind Turbine Control Systems
- Photonic and Optical Devices
The University of Texas at Austin
2017-2025
Stomatology Hospital
2013-2025
Zhejiang University
2025
Detroit Medical Center
2025
East China University of Science and Technology
2025
Sun Yat-sen University
2013-2024
Nanfang Hospital
2024
Southern Medical University
2024
Third Affiliated Hospital of Sun Yat-sen University
2024
Beijing Institute of Technology
2022-2024
This paper presents an architecture for a future electric power distribution system that is suitable plug-and-play of distributed renewable energy and storage devices. Motivated by the success (information) Internet, described in this was proposed NSF FREEDM Systems Center, Raleigh, NC, as roadmap automated flexible system. In envisioned “Energy Internet,” enables sharing consumers residential The key technologies required to achieve such vision are presented result research partnership Center.
Silicon carbide (SiC) power devices have been investigated extensively in the past two decades, and there are many commercially available now. Owing to intrinsic material advantages of SiC over silicon (Si), can operate at higher voltage, switching frequency, temperature. This paper reviews technology progress their emerging applications. The design challenges future trends summarized end paper.
Gallium nitride (GaN) is a compound semiconductor that has tremendous potential to facilitate economic growth in industry silicon-based and currently faced with diminishing returns of performance versus cost investment. At material level, its high electric field strength electron mobility have already shown for frequency communications photonic applications. Advances on commercially viable large area substrates are now at the point where power conversion applications GaN cusp...
The solid-state transformer (SST), which has been regarded as one of the 10 most emerging technologies by Massachusetts Institute Technology (MIT) Review in 2010, gained increasing importance future power distribution system. This paper presents a systematical technology review essential for development and application SST state-of-the-art four critical areas are reviewed, including high-voltage devices, high-power high-frequency transformers, ac/ac converter topologies, applications In...
The solid-state transformer (SST) is an interface device between ac distribution grids and dc systems. SST consists of a cascaded multilevel ac/dc rectifier stage, dual active bridge (DAB) converter stage with high-frequency transformers to provide regulated 400-V distribution, optional dc/ac that can be connected the bus residential 120/240 V <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$_{\rm...
Integrating a battery energy storage system (BESS) with solar photovoltaic (PV) or wind farm can make these intermittent renewable sources more dispatchable. This paper focuses on the development of control strategy for optimal use BESS this purpose. The considers rule-based scheme, which is solution problem defined, to incorporate operating constraints BESS, such as state charge limits, charge/discharge current and lifetime. goal have provide much smoothing possible so that resource be...
By reducing the power supply voltage, faster, lower consumption, and high integration density data processing systems can be achieved. The current generation high-speed complementary metal-oxide-semiconductor (CMOS) processors (e.g., Alpha, Pentium, Power PC) are operating at above 300 MHz with 2.5 to 3.3 V output range. Future will designed in 1.1-1.8 range, further enhance their speed-power performance. These new microprocessors present very dynamic loads slew rates during transient. As a...
Integrating a battery energy storage system (BESS) with large wind farm can smooth out the intermittent power from farm. This paper focuses on development of control strategy for optimal use BESS this purpose. The considers conventional feedback-based scheme revisions to incorporate operating constraints BESS, such as state charge limits, charge/discharge rate, and lifetime. goal is have provide much smoothing possible so that be dispatched an hourly basis based forecasted conditions....
Ten-kilovolt SiC MOSFETs are currently under development by a number of organizations in the United States, with aim enabling their applications high-voltage high-frequency power conversions. The this paper is to obtain key device characteristics so that realistic application prospect can be provided. In particular, emphasis on obtaining losses various operation conditions from extensive characterization study and proposed behavioral SPICE model. Using validated MOSFET model, 20-kHz 370-W...
The solid-state transformer (SST) is one of the key elements in power electronic-based microgrid systems. single-phase SST consists a modular multilevel ac-dc rectifier, dual active bridge (DAB) dc-dc converter with high-frequency transformers, and dc-ac inverter stage. However, due to dc bus voltage unbalancing each module, often presents instability problems making its design difficult causing unpredictable behavior. Moreover, unbalanced dc-link voltages increase stress semiconductor...
Cascaded H-bridge multilevel converter (CHMC) is a promising topology for flexible ac transmission systems such as static synchronous compensator (STATCOM) applications. Attention was drawn to the issue of reliability due large number power devices used in CHMC This paper proposed an effective fault-tolerant strategy by using building block (HBBB) redundancy CHMC-based STATCOM. The operating principle and control fault tolerance are discussed. controller design consideration STATCOM...
Integrating a battery energy storage system (BESS) with large wind farm can make more dispatchable. This paper focuses on development of control strategy for optimal use the BESS this purpose. The considers an open-loop scheme to incorporate operating constraints BESS, such as state charge limits, charge/discharge current and lifetime. goal is have provide much smoothing possible, so that be dispatched hourly basis based forecasted conditions. effectiveness has been tested by using actual...
Recently, renewable wind energy is enjoying a rapid growth globally to become an important green electricity source replace polluting and exhausting fossil fuel. However, with being uncontrollable resource the nature of distributed induction generators, integrating large-scale wind-farm into power system poses challenges, particularly in weak system. In paper, impact static synchronous compensator (STATCOM) facilitate integration large farm (WF) studied. First, actual two nearby WFs...
Solid-state transformer (SST) has been regarded as one of the most important emerging technologies for traction system and smart grid application. This paper presents design performance demonstration a high-voltage SST lab prototype that works active interface in architecture. Specifically, designs key components system, including both power stage controller platform, are presented. In addition, advanced control is developed to achieve high-performance operation. Furthermore, integration...
There is a growing interest on plug-in hybrid electric vehicles (PHEV's) due to energy security and green house gas emission issues, as well the low electricity fuel cost. As battery capacity all-electric range of PHEV's are improved, potentially some or EV's need fast charging, there increased demand build high power off-board charging infrastructures. A charge station architecture for municipal parking decks has been proposed, which DC microgrid interface with multiple DC-DC chargers,...
A three-port dc-dc converter integrating photovoltaic (PV) and battery power for high step-up applications is proposed in this paper. The topology includes five switches, two coupled inductors, active-clamp circuits. inductors are used to achieve voltage gain reduce the stress of input side switches. Two sets circuits recycle energy stored leakage improve system efficiency. operation mode does not need be changed when a transition between charging discharging occurs. Moreover, tracking...
Offshore wind farm with an internal medium-voltage dc (MVDC)-grid collection connected HVDC transmission may be option to harvest offshore energy. High-power MV dc/dc converters high-step-up conversion ratios are the key components for MVDC grid. In this paper, a high-efficiency step-up resonant switched-capacitor converter energy system is studied, which characterized by soft-switching condition all switches and diodes. This significantly reduces switching losses higher frequency feasible...
The future renewable electric energy delivery and management (FREEDM) system provides a dc interface for alternative sources. As result, photovoltaic (PV) can be easily delivered through dc/dc converter to the FREEDM system's bus. module-integrated (MIC) topology is good candidate PV designed work with system. This paper compares parallel connected MIC structure its counterpart, series architecture. From presented analysis, architecture was shown have more advantages. In this paper,...
The contribution of this paper has been focused on investigating a new microgrid architecture that integrates the solid-state transformer with zonal dc microgrids. By utilizing and ac links transformer, both networks can access distribution system, which renders coordinate management power guarantees high supply reliability. In addition, presented system together proposed strategy minimize effect newly established to existing grid, promises better stability. To end, takes photovoltaic...
The most important impact of power electronics on our society in the last 50 years has been elimination 60-Hz ac delivery system for consumer electronic products. Central to this achievement is use silicon (Si) devices and pulsewidth modulation (PWM) techniques delivering regulated dc powers low-voltage (LV) loads such as light-emitting diodes computers. These solid-state converters have provided numerous benefits, including high-quality substantial energy savings. They also form core...
The emergence of high power converters makes the modern grid more active than it was before. One research directions in this area is solid state transformer, which aims at replacing traditional 50/60 Hz transformer by means frequency isolated AC/AC conversion techniques. This paper presents a systematical technology review essential for development distribution system, especially focusing on following four areas: voltage and devices, transformers, converter topologies, applications system....
This paper presents a novel 400 to 12 V isolated bidirectional dc-dc converter based on phase-shift-controlled-modified dual-active-bridge power stage. The proposed consists of half-bridge and center tap with active clamp circuit, which has promising performance for low-voltage high-current applications. 650 gallium-nitride high electron mobility transistors are used the voltage side avoid issues encountered using Si superjunction MOSFETs in phase-shift-controlled-bidirectional conversions....
The need for power semiconductor devices with high-voltage, high- frequency, and high-temperature operation capability is growing, especially advanced conversion military applications, hence the size weight of electronic system are reduced. Development 15-kV SiC IGBTs their impact on utility applications discussed.