A5103138723- Silicon Carbide Semiconductor Technologies
- Multilevel Inverters and Converters
- Wind Turbine Control Systems
- Wind Energy Research and Development
- Power System Reliability and Maintenance
- HVDC Systems and Fault Protection
- Microgrid Control and Optimization
- Magnetic Properties and Applications
- Wave and Wind Energy Systems
- Advanced Sensor and Energy Harvesting Materials
- Machine Fault Diagnosis Techniques
- Electromagnetic Compatibility and Noise Suppression
- Real-time simulation and control systems
- Thermal Analysis in Power Transmission
- Electric Motor Design and Analysis
- Electrostatic Discharge in Electronics
- Advanced Aircraft Design and Technologies
- Electronic Packaging and Soldering Technologies
- Advancements in Battery Materials
- Polydiacetylene-based materials and applications
- Power Transformer Diagnostics and Insulation
- Advanced Sensor and Control Systems
- Non-Destructive Testing Techniques
- Tactile and Sensory Interactions
- Electric Power System Optimization
Offshore Renewable Energy Catapult
2018-2025
National Renewable Energy Centre
2020
Abstract While MXene is widely used as an electrode material for supercapacitor, the intrinsic limitation of stacking caused by interlayer van der Waals forces has yet to be overcome. In this work, a strategy proposed fabricate composite scaffold (MCN) intercalating with highly nitrogen‐doped carbon nanosheets (CN). The 2D structured CN, thermally converted and pickling from Zn‐hexamine (Zn‐HMT), serves spacer that effectively prevents contributes hierarchically scaffolded structure, which...
Graphene aerogels hold huge promise for the development of high-performance pressure sensors future human-machine interfaces due to their ordered microstructure and conductive network. However, application is hindered by limited strain sensing range caused intrinsic stiffness porous microstructure. Herein, an anisotropic cross-linked chitosan reduced graphene oxide (CCS-rGO) aerogel metamaterial realized reconfiguring from a honeycomb buckling structure at dedicated cross-section plane. The...
Multichip insulated gate bipolar transistor (mIGBT) power modules (PMs) degrade over cycling. Bond wire lift-off is one of the major failure modes. This article presents a technique to diagnose bond by analyzing on-state voltages across collector and emitter terminals Kelvin terminals. The proposed method can indicate first out 37 wires in mIGBT. main novelty that it locate chip has lift-off(s). In addition, temperature dependence approach negligible. describes detail shows results...
ABSTRACT Iron hexacyanoferrate (FeHCF) is a promising cathode material for sodium‐ion batteries (SIBs) due to its high theoretical capacity and low cost. Nevertheless, water in FeHCF likely take up Na + sites leading the reductions rate capability. Herein, an ion‐exchange method proposed synthesize low‐water potassium‐sodium mixed iron (KNaFeHCF). The can preserve lattice structure with vacancies K larger ionic radii reduce content improve reaction kinetics. Compared NaFeHCF synthesized by...
Power semiconductor chips are paralleled in modules to increase current rating. Under thermo-mechanical stresses service, the die-attach solder layers will gradually develop into different levels of degradation. Early fault detection requires monitor occurrence such an uneven degradation pattern. Internal temperature differences only slightly affect sharing between chips, and some sensitive electric parameters considerably weakened at module terminals. This article presents external...
Temperature sensitive electrical parameters (TSEPs) are used to determine the chip temperature of a single-chip insulated gate bipolar transistors (IGBT) power module by measuring one device parameter. Commonly, most TSEPs have linear relationship between and Like any sensor, preferred attributes include good accuracy, linearity, sensitivity. For multichip IGBTs (mIGBTs) modules, these can only be achieved when all chips same temperature. Equal temperatures among different semiconductor...
This paper assesses the suitability of use Fiber Bragg Grating Sensors for effective in-situ sensing IGBT junction temperature. To this end, optical sensor is installed on chip surface in a commercial module, enabling direct reading its Two interfacing configurations are evaluated by means Finite Element simulations and experiments purpose designed laboratory test system. Experiments show feasibility FBG technology reliable real-time measurement temperature wide operating envelope tested device.
As the number of turbines in offshore wind farms increases, so does complexity cable routing optimisation problems.Optimising collector network is a crucial task for developers contributing between 15% and 30% initial investment costs.For some algorithms, increasing leads to unfavourable scaling computational time memory required reach optimal solutions.Heuristics offer an alternative but are likely incur increases total costs relative solution since heuristic searching cannot guarantee...
This article studies the influence of fiber Bragg grating (FBG) head length on insulated gate bipolar transistor (IGBT) direct on-chip thermal sensing performance FBG sensors. To this end, surface a commercial IGBT chip is thermally simulated and experimentally characterized. Uniform sensors with three sizes are then tested in two promising locations. The study has found that large gradients application create an additional constraint when using longer lengths. A distortion reflected...
Under asymmetrical grid fault conditions, oscillating active power can occur on the grid-side converter (GSC) of permanent magnet synchronous generator (PMSG)-based wind turbine generators. The flows into DC-link, causing voltage oscillations that lead to a shortened lifetime DC-link capacitors and additional harmonics injected grid. While conventional methods mitigate through negative sequence current injection by GSC, this hinders support GSC regarding reactive during fault. To address...
This article presents a novel analytical fault model based on pulsewidth modulation (PWM) voltage rather than ideal sinewave phase for permanent magnet (PM) machines with interturn short circuit fault. is important because PM are usually driven by the PWM inverter. In addition, main contributors to accuracy of such as cables between inverter and machine, precision rotor position estimation, inverter, in particular metal-oxide semiconductor field-effect transistors have been considered....
Semiconductor devices are usually used in parallel to increase the current rating, but uneven degradation is inevitable among chips. Based on heat-flux heath condition monitoring (HHCM), one can diagnose package of individual chips using external measurements and a neural network (NN). In this paper several deep learning networks analyzed terms training speed accuracy. The paralleled tested steady state transient conditions with variation operating point. Thermo-electrical measurement data...
This study introduces a Digital Twin (DT) framework for the reliability assessment of wind turbine power modules. Its importance is demonstrated by examining effect turbulence on electrothermal behaviour and lifetime machine side electronic converters semiconductor devices direct-drive turbines. To this end, an model embedded in established, which tracks changes speed. Using real-world, 1-sec speed data, real device junction temperature profiles fatigue experienced are examined two 10-min...
This article aims to develop an analytical fault model based on PWM voltages for permanent magnet (PM) machines with inter-turn short-circuit (ITSC) faults. Using voltage-based modeling is mainly because the PM are commonly driven by inverters. more accurate compared ones that use sinewave as inputs latter neglect harmonics in current. However, investigation this showed that, depending dc bus voltage and switching frequency, harmonic component could be than 50% of fundamental current,...
The research focuses on feasibility study of SiC devices applied to a low voltage converter module in wind power generation system. In this paper, comparison the and Si is presented based simulations terms loss, efficiency, heatsink design, filter inductor volume. It shown that have great potential replace even converters future systems.
Abstract This study presents a new turbine layout optimisation approach using grid‐based problem formulation for improved design performance and computational efficiency industrial‐scale applications. A particle swarm algorithm is employed in the wind optimisation, which micro‐siting function proposed to allow solutions 50 m of deviation while maximising energy capture without compromising maritime navigation or search rescue operations. Solutions are assessed by farm model, comprising...
This study proposes a technique to monitor the gradual ageing of IGBT power modules in offshore wind turbine converters from SCADA data using fusion model Autoencoder (AE) and attention-based Long-Short-Term Memory Neural Network (AT-LSTM). Power electronic turbines operate complex conditions, device junction temperatures are difficult detect directly. The temperature variation is directly affected by module's thermal resistance, which changes with ageing. Monitoring process based on...
Silicon carbide (SiC) power semiconductor allows wind energy conversion systems (WECS) to operate at higher frequency owing its lower loss compared the IGBT counterpart. To evaluate impact of on grid filter, a and volume optimization scheme within wide range is developed, considering variation ripple current core material. Two typical filter structures, namely L LCL, are analyzed regarding tradeoffs between efficiency volumetric density. The selection criterion two materials under specific...