A5102853055- HVDC Systems and Fault Protection
- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Frequency Control in Power Systems
- High-Voltage Power Transmission Systems
- Microgrid Control and Optimization
- Aluminum Alloys Composites Properties
- Superconductivity in MgB2 and Alloys
- Power Systems and Renewable Energy
- Graphene research and applications
- Magnetic Bearings and Levitation Dynamics
- Power System Optimization and Stability
- Magnetic Properties and Applications
- Spacecraft and Cryogenic Technologies
- Advanced materials and composites
- Wind Turbine Control Systems
- Silicon Carbide Semiconductor Technologies
- Magnetic Field Sensors Techniques
- Integrated Energy Systems Optimization
- Power Systems Fault Detection
- High voltage insulation and dielectric phenomena
- Induction Heating and Inverter Technology
- Hybrid Renewable Energy Systems
- Smart Grid and Power Systems
- Advanced Thermoelectric Materials and Devices
Chinese Academy of Sciences
2016-2025
Institute of Electrical Engineering
2016-2025
University of Chinese Academy of Sciences
2008-2024
National Laboratory for Superconductivity
2006-2023
Beijing Haidian Hospital
2019
PLA Information Engineering University
2010
Two major problems that are faced by doubly fed induction generators are: weak low-voltage ride-through capability and fluctuating output power. To solve these problems, a superconducting fault-current limiter-magnetic energy storage system is presented. The coil (SC) utilized as the device for power smoothing control during normal operation limiting inductor to limit surge current in stator or rotor grid fault. SC can also weaken back electromotive force voltage, thus enhance...
A frequency-based approach is proposed in this paper to size a battery-supercapacitor energy storage system for maintaining power balance of an isolated with high penetration wind generation, thus maintain the grid frequency stability stochastic fluctuations being considered. The sizing method makes full use combined technical merits two types systems, battery and supercapacitor, as their specific power/energy densities corresponding expected life cycle cost/year are different. imbalance...
Bi–Sb–Te-based semiconductors possess the best room-temperature thermoelectric performance, but are restricted for application in wearable field because of their inherent brittleness, rigidity, and nonscalable manufacturing techniques. Therefore, how to obtain materials with excellent properties flexibility through batch production process is a serious challenge. Here, we report fabrication flexible p-type Ag-modified Bi0.5Sb1.5Te3 films on substrates using facile approach. Their optimized...
A flexible TE generator exhibits a high power density of 897.8 μW cm<sup>−2</sup> at relatively small Δ<italic>T</italic> 40 K.
We develop an electric internal heating method based on a Ni-foam structured catalyst for CO<sub>2</sub> methanation, in which the Joule heat generated by current passing through drives reaction.
To meet the ultra-fast, selective, and reliable requirements of DC fault protection, a protection scheme for modular multilevel converter based HVDC grids is proposed in this paper. The consisted main directional pilot faulty pole identification. new criterion achieved by employing surge arriving time difference line-mode backward traveling wave forward wave. This valid even when current limiting reactors (FCLRs) are installed at side bus. without communication complex computation relies on...
The growing environmental pressure resulting from the use of fossil fuels is leading mankind to make a transition traditional energy sources that renewable based clean energy. Because has feature instability, it thus brings significant challenges on real-time power balance and dispatching. Therefore, secure supply, grid needs be upgraded by selection reasonable structure operation mode. In this paper, multiple-level direct current (dc) loop grid, which would suitable mode for future...
Performance of three kinds bridge-type fault current limiters (BTFCLs) for enhancing low-voltage-ride-through (LVRT) capability DFIG is evaluated in this paper. The common BTFCL can effectively enhance the LVRT DFIG. However, fault-current-limiting inductor (FCLI) periodically inserted into stator circuit under normal operation compensating power losses FCLI. insertion FCLI induces voltage spikes, which causes significant flux and electromagnetic torque oscillations. One feasible way to...
Abstract With the increase of electricity demand and rapid development renewable energy generation, it is becoming more important to ensure safety stability power grid, where a superconducting fault current limiter (SFCL) could play an role. In recent years, lot research work has been done in China on application high temperature (HTS) technology, especially aspects limiting limiting-breaking limiting- magnetic storage transformer technology. A number demonstration projects SFCL were also...
Weak low voltage ride‐through (LVRT) ability and unstable output power are two major problems faced by the doubly‐fed induction generator (DFIG). To solve these simultaneously, a commercially available fault current limiter‐battery energy storage system (FCL–BESS), which is suitable to be applied in microgrid, proposed this study. During normal operation, FCL–BESS stabilises of DFIG compensating fluctuating component with buffering capability provided battery (BESS). On occurrence grid...
High temperature superconducting (HTS) generator was promising in the wind power applications for its advantages weight, size and thermal stability against load fluctuations, especially "direct-driven" design. A 100 kW proposed demonstration of feasibility using HTS 10 MW turbine generators. The electromagnetic design optimization rotor were done finite element method (FEM). excitation coil designed considering variable working conditions. According to numerical results, a number suggestions...
With the increasing depletion of fossil fuels and growing environmental pressure, mankind has got known need to vigorously develop renewable energy energy-saving technology. The high Tc superconducting (HTS) power technology will be very helpful enhance stability, reliability, efficiency transmission capacity grid which would dominated by energy. In this paper, we report installation operation a 10 kV HTS substation includes 75 m/1.5 kA cable, kV/1.5 fault current limiter, 1 MJ/0.5 MVA SMES...
The new energy revolution which will be dominated by renewable need to develop a corresponding power grid. Based on the characteristics of resources, and stability problem AC network, it was proposed that DC-based transmission grid should developed in future. high Tc Superconducting (HTS) cable competitive candidate for large-capacity energy. In this paper, progress development 360 m/10 kA HTS DC is presented, prospects discussed.
Superconducting magnetic energy storage (SMES) system is an equipment that can help improving the stability of a power system. Location SMES in multi-nodes network plays significant role for improvement level. In this paper, based on quantitative voltage index, genetic algorithm (GA) used optimization location. The index as fitness function GA. GA mathematic parameters and optimal flow chart are presented. proposed tested IEEE 14-bus Simulation results show settled best site through during...
This study investigates one of the most fundamental issues integrating fuel cell (FC) generation into power systems – its effect on system small-signal stability when it operates jointly with conventional generation. The first presents a comprehensive mathematical model solid oxide (SOFC) plant integrated single-machine infinite-bus system. Based model, damping torque analysis is carried out to SOFC stability. concludes that can be affected either positively or negatively by operating...
A 10-kA/360-m high-temperature superconducting (HTS) dc power cable has been developed and installed in 2012 central China. The is connecting a rectifier at substation to bus bar of an aluminum electrolysis plant. Before operating the grid, series testing on performance was conducted. results show that meets operational requirements critical current exceeds 12.5 kA. 10-kA HTS successfully energized Henan Zhongfu Industrial Company Ltd., Gongyi, China, September 26, 2012. Since then, stably...
A 1-MVA/1-MJ superconducting fault current limiter-magnetic energy storage system (SFCL-MES) has been developed. The SFCL-MES utilizes one coil to both enhance the low-voltage ride-through capability of wind turbine and smooth power output. developed was installed put into operation in a farm northwest China. This paper presents final design test four major components SFCL-MES: conditioning system, cryogenic coil, monitoring system. Test results are also presented. show that good performance...
In this article, a general scheme of 40-kV/2-kA resistive type dc superconducting fault current limiter (SFCL) is suggested, which could be utilized to suppress the surge caused by short-circuit faults in voltage-source-converter HVdc (VSC-HVdc) power grids. This SFCL designed and fabricated with 6 coil modules parallel 4 series. order investigate current-limiting performance under rapidly rising current, tested on platform pulsed impact generator. Besides property limitation, capacity,...