A5089202154- HVDC Systems and Fault Protection
- Real-time simulation and control systems
- High-Voltage Power Transmission Systems
- Fluid Dynamics and Heat Transfer
- Radiation Effects in Electronics
- Electrostatic Discharge in Electronics
- Solidification and crystal growth phenomena
- Microfluidic and Bio-sensing Technologies
- Microgrid Control and Optimization
- Silicon Carbide Semiconductor Technologies
- Nuclear reactor physics and engineering
- Fluid Dynamics and Thin Films
- Power System Optimization and Stability
- Multilevel Inverters and Converters
- Lightning and Electromagnetic Phenomena
- Power Systems and Renewable Energy
- Lattice Boltzmann Simulation Studies
- Power Systems and Technologies
- Electrowetting and Microfluidic Technologies
- Simulation Techniques and Applications
- Nuclear Engineering Thermal-Hydraulics
- Nonlinear Dynamics and Pattern Formation
- Computational Fluid Dynamics and Aerodynamics
- Electrohydrodynamics and Fluid Dynamics
Institute of Mechanics
2016-2022
Chinese Academy of Sciences
2016-2022
University of Tennessee at Knoxville
2016-2019
Huazhong University of Science and Technology
2017
University of Chinese Academy of Sciences
2017
Power system simulation is an important means to study the dynamic behavior, ensure safety and stability, optimize operation of a power grid. Pure physical digital have their own advantages disadvantages. A three-phase four-wire hybrid platform integrating both developed by combining real-time simulator. The rated at 400 V 50 kVA with short-circuit capacity 500 can supply ten times current support various faults. An improved interface algorithm based on ideal transformer model proposed...
A transmission line emulator has been developed to flexibly represent interconnected ac lines under normal operating conditions in a voltage-source-converter-based power system emulation platform. As the most serious short-circuit fault condition, three-phase is essential for studies. This paper proposes model realize at different locations along single or one of several parallel-connected lines. At same time, combination method proposed eliminate undesired transients caused by current...
A real-time hardware testbed (HTB) has been constructed to emulate the power system by modular regenerative converters. This allows realistic testing and demonstration with true measurement, communication, control. However, size of that can be emulated HTB is limited, certain phenomena are not easy or needed modeled in HTB. hybrid emulation platform, which combines real time digital simulator (RTDS) HTB, developed this paper complement advantages RTDS electronics converter designed act as...
Ac transmission line emulator is the bridge to interconnect ac systems fulfill grid emulation function, where all elements such as generators, loads and lines are implemented by universal three-phase voltage source converters. In this paper, three design issues addressed. First, impact of switching noise on performance a in terms steady state dynamic accuracy described, an improved sampling algorithm presented. Then, new dc offset controller proposed mitigate induced current flow sampled...
A hardware test-bed (HTB) has been developed to realize power system emulation by mimicking the components with universal three-phase voltage source converters (VSCs). The VSC-based transmission line emulator also successfully flexibly represent interconnected ac lines under normal operating conditions. As most serious short-circuit fault condition, is essential for studies. This paper proposes a model within emulated line. At same time, combination method proposed eliminate undesired...
The modular multilevel converter (MMC) is regarded as a competitive choice for future dc grids at high and medium voltage levels. To study the grid stability, few MMC impedance models have been proposed, but their accuracy limited by assumption of ideal submodule or neglecting circulating current control. In this paper, more accurate model developed considering both capacitor dynamics. Simulation experiment results indicate that matches with actual better than state-of-art can predict system...
Hybrid ac/dc transmission can increase the power transfer capability of long ac lines. High voltage dc (HVDC) converters are needed, and line-commutated converter (LCC) is used considering fault current controllability. However, zero-sequence be generated due to coupled lines, it will flow into HVDC as a fundamental frequency component on side (i60). The LCC convert i60 components side, which may cause potential transformer saturation. This paper analyzes influence lines saturation proposes...
Modular multilevel converters (MMCs) have been widely adopted for high voltage direct current (HVDC) applications and targeted use in future dc grids as well. However, most of the MMC research is still limited to digital simulations or relied on hardware demonstrations with a specific setup number submodules (SMs). In this paper, test-bed 10 SMs each arm developed that has flexible reconfiguration topologies, switching frequencies, passive element parameters. The construction, control...
The thermal-hydraulics module for reactor multi-physics coupling is studied. Multi-physics high temperature gas cooling very important due to the interaction between different physics, especially neutronics and thermal-hydraulics. This paper demonstrates an Incompressible Navier-Stokes (INS) in Multiphysics Object-Oriented Simulation Environment (MOOSE) validate accuracy efficiency of module, research on INS significant basis future work. MOOSE open-source finite element platform developed...
Multi-terminal dc (MTDC) grid has been considered as a promising future transmission and distribution system architecture, especially for remote renewable energy integration. However, short-circuit faults can be more detrimental to grids than ac grids. The lack of effective economical circuit breakers potential significant impact fault on the connected have become main barrier application. This paper analyzes major differences under conditions. After that, is evaluated by comparing with an...
The frequency decoupling effect of the voltage source converter (VSC)-based high dc (HVDC) transmission makes support unavailable between two ac subsystems interconnected by HVDC link. Recently, several algorithms have been proposed and demonstrated to improve system stability implementing inertia emulation (IE) functions in VSC stations. However, capability VSC-HVDC achieve IE control is not clear. According previous research, strategy has studied without concerning impact practical...
Thermocapillary convection is a common flow in space. Experiments regarding thermocapillary were previously carried out large-scale liquid bridge with diameter of 20 mm on the Tiangong-2 space station, and transition process to chaos was systematically studied. Under microgravity conditions, gravity greatly weakened, very slow. This allows for opportunity study bifurcation detail. It has been found that there are abundant nonlinear physical phenomena associated changing geometric parameters...
A power converter based transmission line emulator has been developed for the hardware test-bed (HTB) platform, which emulates systems by mimicking system components with universal three-phase voltage source converters. In grids, series compensation devices are utilized to enhance delivery capability and controllability regulating equivalent impedance of a line. This paper proposes method variable capacitors inductors combine device emulation into so that various scenarios can be studied....