A5002774644- Electric Motor Design and Analysis
- Microgrid Control and Optimization
- Advanced Battery Technologies Research
- Multilevel Inverters and Converters
- Magnetic Bearings and Levitation Dynamics
- Advanced DC-DC Converters
- Silicon Carbide Semiconductor Technologies
- Sensorless Control of Electric Motors
- Electromagnetic Compatibility and Noise Suppression
- Magnetic Properties and Applications
- Advancements in Battery Materials
- Smart Grid Energy Management
- Wireless Power Transfer Systems
- Wind Turbine Control Systems
- Electric Vehicles and Infrastructure
- Induction Heating and Inverter Technology
- Iterative Learning Control Systems
- Energy Harvesting in Wireless Networks
- Optimal Power Flow Distribution
- Building Energy and Comfort Optimization
- Power System Optimization and Stability
- Advanced battery technologies research
- HVDC Systems and Fault Protection
- Advancements in Semiconductor Devices and Circuit Design
- Impact of Light on Environment and Health
Singapore Institute of Technology
2016-2025
Agency for Science, Technology and Research
2014-2018
Nanyang Technological University
2008-2017
Shenzhen University
2016
Singapore-MIT Alliance for Research and Technology
2015
University of Wollongong
2011
University of California, Riverside
2010
University of Cambridge
1992-2002
National University of Singapore
1989-2002
Nanjing University of Aeronautics and Astronautics
2002
A robust and reliable grid power interface system for wind turbines using a permanent-magnet synchronous generator (PMSG) is proposed in this paper, where an integration of generator-side three-switch buck-type rectifier grid-side Z-source inverter employed as bridge between the grid. The modulation strategy topology developed from space-vector network operation principles. Two PMSG control methods, namely, unity-power-factor rotor-flux-orientation (Id = 0), are studied to establish...
The state-of-charge (SOC) observer with online model adaption generally has high accuracy and robustness. However, the unexpected sensing of noises is shown to cause biased identification parameters. To address this problem, a novel technique which integrates recursive total least squares (RTLS) an SOC proposed enhance estimate. An efficient method exploited solve Rayleigh quotient minimization lays basis RTLS. number multiplies, divides, square roots elaborated show low computational...
This paper presents a novel speed control technique for an interior permanent-magnet synchronous motor (IPMSM) drive based on newly developed adaptive backstepping technique. The proposed stabilizing feedback law the IPMSM is shown to be globally asymptotically stable in context of Lyapunov theory. takes system nonlinearities into account design stage. detailed derivations laws have been given controller design. complete incorporating has successfully implemented real-time using digital...
This paper presents the design and analysis of a novel axial flux permanent-magnet (AFPM) machine for flywheel energy storage system (FESS). Its control facilitate significant reduction in bearing stress losses. Due to unconventional distribution this machine, 3-D finite element method was employed its analysis, including electromagnetic torque force performances. The effects rotor PM skew angle on cogging have been studied. It is found that an optimum effective reducing overall with...
A battery energy storage scheme to enable short-term dispatch commitment from a grid-connected wind-turbine generating power station is considered. Among the various types of medium, technical factors leading selection are explained. The utilizes two systems (BESS) in which generated wind charges one BESS while concurrently, second discharge into grid. role interchanges when reaches specified state charge/discharge. Furthermore, based on forecasted charging and monitored states charge BESS,...
The state of energy (SOE) is a key indicator for the optimization and management lithium-ion (Li-ion) battery-based storage systems in smart grid applications. To improve SOE estimation accuracy, Li-ion battery model presented this study against dynamic loads ageing effects. First, an electrical combined with analytical order to take advantages both models accurate prediction terminal voltage characteristics, SOE, remnant runtime. Second, novel method separate fast slow dynamics developed,...
Accurate estimation of power capacity is critical to ensure battery safety margins and optimize energy utilization. Power estimators based on online identified equivalent circuit model have been widely investigated due the high accuracy affordable computing cost. However, impact noise corruption which common in practice such has never investigated. This paper scrutinizes effect noises identification, state charge (SOC) estimation. An identification method adaptive forgetting recursive total...
High power density is required for converter in more electric aircraft due to the strict demands of volume and weight, which makes silicon carbide (SiC) extremely attractive this application. In paper, a prototype 50-kW SiC two-level three-phase voltage source inverter demonstrated with gravimetric 26 kW/kg (without inclusion filter). A gate assisted circuit introduced reduce switching loss. addition, ringings current parasitic parameters during transition can also be mitigated. mathematical...
This paper presents a design methodology for high power density converter, which emphasizes weight minimization. The considers various inverter topologies and semiconductor devices with application of cold plate cooling LCL filter. Design high-power is evaluated demonstration 50 kVA 2-level 3-phase SiC operating at 60 kHz switching frequency. prototype achieves gravimetric 6.49 kW/kg.
This paper presents a digital method to regulate the single-inductor multiple-input multiple-output (SI-MIMO) dc-dc converter, which can integrate renewable sources and loads as hybrid energy system with less components. The is able achieve power-sharing cross-regulation suppression, it named PS-CRS. PS-CRS based on model predictive control, power sharing, time multiplexing. A controller developed from multiple sources. cross-regulation-suppression designed control output voltages...
The increased focus on sustainability in response to climate change has given rise many new initiatives meet the building load demand. concept of distributed energy resources (DER) and optimal control supply power demands buildings have resulted growing interest adopt microgrids for a precinct or university campus. In this paper, model an actual physical microgrid been constructed OPAL-RT real-time simulation studies. SIT@NYP campus its weather data are collected serve as input run digital...
This paper presents an electric arc model that can approximately represent both the static and dynamic characteristics of load controlled by a power electronic circuit. The proposed was developed from combination modifications classical Cassie Mayr equations. equations have been expressed in form suitable for incorporation into circuit simulators employing nodal analysis method equation solving. has test-implemented Saber simulator. Simulated experimental results appear to be good agreement.
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> A scheme that allows the dispatch of steady and controllable level power from a wind generating station is proposed in this paper. The utilizes two battery energy storage systems (BESSs) which generated used to charge one BESS, while second BESS discharge constant into grid. role interchanges when discharging reaches specified operating limit. With mind based on given speed statistics, charging...
This paper investigates the energy efficiency of Li-ion battery used as storage devices in a micro-grid. The overall depends on under charging, discharging, and charging-discharging conditions. These three types single cell have been calculated different current rates. relations efficiencies with rate are analyzed using non-linear curve fitting polynomial equations. Moreover, present study has verified to low imbalance when 10 cells connected series without any equalizers, pack obtained...