Publications
496 results found
Qin Y, Yang Y, Li S, et al., 2020, A High-Efficiency DC/DC Converter for High-Voltage-Gain, High-Current Applications, IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS, Vol: 8, Pages: 2812-2823, ISSN: 2168-6777
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- Citations: 13
Liu H, Ng WM, Lee C-K, et al., 2020, Integration of Flexible Loads and Electric Spring Using a Three-Phase Inverter, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 35, Pages: 8013-8024, ISSN: 0885-8993
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- Citations: 7
Li K, Tan SC, Hui RSY, 2020, Single-Stage Regulated Resonant WPT Receiver With Low Input Harmonic Distortion, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 35, Pages: 6820-6829, ISSN: 0885-8993
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- Citations: 8
Guo J, Badesa Bernardo L, Teng F, et al., 2020, Value of point-of-load voltage control for enhanced frequency response in future GB power system, IEEE Transactions on Smart Grid, Vol: 11, Pages: 4938-4948, ISSN: 1949-3053
The need for Enhanced Frequency Response (EFR)is expected to increase significantly in future low-carbon GreatBritain (GB) power system. One way to provide EFR is touse power electronic compensators (PECs) for point-of-loadvoltage control (PVC) to exploit the voltage dependence of loads.This paper investigates the techno-economic feasibility of suchtechnology in future GB power system by quantifying the totalEFR obtainable through deploying PVC in the urban domesticsector, the investment cost of the installment and the economicand environmental benefits of using PVC. The quantificationis based on a stochastic domestic demand model and genericmedium and low-voltage distribution networks for the urbanareas of GB and a stochastic unit commitment (SUC) modelwith constraints for secure post-fault frequency evolution is usedfor the value assessment. Two future energy scenarios in thebackdrop of 2030 with ‘smart’ and ‘non-smart’ control of electricvehicles and heat pumps, under different levels of penetration ofbattery energy storage system (BESS) are considered to assessthe value of PEC, as well as the associated payback period. Itis demonstrated that PVC could effectively complement BESStowards EFR provision in future GB power system.
Chen T, Liu H, Lee C-K, et al., 2020, A Generalized Controller for Electric-Spring-Based Smart Load With Both Active and Reactive Power Compensation, IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS, Vol: 8, Pages: 1454-1465, ISSN: 2168-6777
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- Citations: 22
Li KH, Cheung YF, Jin W, et al., 2020, InGaN RGB Light-Emitting Diodes With Monolithically Integrated Photodetectors for Stabilizing Color Chromaticity, IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 67, Pages: 5154-5160, ISSN: 0278-0046
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- Citations: 26
Yan S, Chen J, Tan S-C, et al., 2020, A New Geometric Vector Optimization of Predictive Direct Power Control, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 35, Pages: 5427-5436, ISSN: 0885-8993
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- Citations: 10
Wang M-H, Yan S, Tan S-C, et al., 2020, Decentralized Control of DC Electric Springs for Storage Reduction in DC Microgrids, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 35, Pages: 4634-4646, ISSN: 0885-8993
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- Citations: 16
Lee ATL, Chen H, Tan S-C, et al., 2020, New Dynamic Photo-Electro-Thermal Modeling of Light-Emitting Diodes With Phosphor Coating as Light Converter-Part II: Model Parameter Determination and Practical Verification, IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS, Vol: 8, Pages: 780-793, ISSN: 2168-6777
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- Citations: 7
Qi W, Li S, Tan S-C, et al., 2020, Design Considerations for Voltage Sensorless Control of a PFC Single-Phase Rectifier Without Electrolytic Capacitors, IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 67, Pages: 1878-1889, ISSN: 0278-0046
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- Citations: 20
Hui SY, Lee ATL, Tan S-C, 2020, New Dynamic Photo-Electro-Thermal Modeling of Light-Emitting Diodes With Phosphor Coating as Light Converter Part I: Theory, Analysis, and Modeling, IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS, Vol: 8, Pages: 771-779, ISSN: 2168-6777
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- Citations: 10
Yuan H, Li S, Tan S-C, et al., 2020, Internal Dynamics Stabilization of Single-Phase Power Converters With Lyapunov-Based Automatic-Power-Decoupling Control, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 35, Pages: 2160-2169, ISSN: 0885-8993
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- Citations: 15
Fang Y, Pong BMH, Hui RSY, 2020, An Enhanced Multiple Harmonics Analysis Method for Wireless Power Transfer Systems, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 35, Pages: 1205-1216, ISSN: 0885-8993
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- Citations: 17
Zheng Y, Hill DJ, Song Y, et al., 2020, Optimal Electric Spring Allocation for Risk-Limiting Voltage Regulation in Distribution Systems, IEEE TRANSACTIONS ON POWER SYSTEMS, Vol: 35, Pages: 273-283, ISSN: 0885-8950
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- Citations: 12
Yang Y, Tan S-C, Hui SYR, 2019, Front-End Parameter Monitoring Method Based on Two-Layer Adaptive Differential Evolution for SS-Compensated Wireless Power Transfer Systems, IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS, Vol: 15, Pages: 6101-6113, ISSN: 1551-3203
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- Citations: 31
Yang Y, Qin Y, Tan S-C, et al., 2019, Efficient Improvement of Photovoltaic-Battery Systems in Standalone DC Microgrids Using a Local Hierarchical Control for the Battery System, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 34, Pages: 10796-10807, ISSN: 0885-8993
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- Citations: 43
Li K, Tan S-C, Hui RSY, 2019, Single-Switch-Regulated Resonant WPT Receiver, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 34, Pages: 10386-10391, ISSN: 0885-8993
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- Citations: 15
Qi W, Li S, Yuan H, et al., 2019, High-Power-Density Single-Phase Three-Level Flying-Capacitor Buck PFC Rectifier, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 34, Pages: 10833-10844, ISSN: 0885-8993
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- Citations: 31
Jin W, Lee ATL, Tan S-C, et al., 2019, A Gallium Nitride (GaN)-Based Single-Inductor Multiple-Output (SIMO) Inverter With Multi-Frequency AC Outputs, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 34, Pages: 10856-10873, ISSN: 0885-8993
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- Citations: 13
Chen H, Lee ATL, Tan S-C, et al., 2019, Dynamic Optical Power Measurements and Modeling of Light-Emitting Diodes Based on a Photodetector System and Photo-Electro-Thermal Theory, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 34, Pages: 10058-10068, ISSN: 0885-8993
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- Citations: 8
Yan S, Chen J, Yang T, et al., 2019, Improving the performance of direct power control using duty cycle optimization, IEEE Transactions on Power Electronics, Vol: 34, Pages: 9213-9223, ISSN: 0885-8993
Direct power control (DPC) has been proposed as an effective control method for pulse-width modulated (PWM) converters. The recent development focuses on the integration of the model predictive (MP) control and DPC to obtain better steady-state performance. In most MP-DPCs, duty cycle optimization (DCO) is a common technique to achieve the power error minimization. However, the periodic occurrence of a duty cycle larger than one ("D > 1") deteriorates the performance of the PWM converter by inducing current spikes and power surges. To address this problem, this paper conducts an in-depth examination on the "D > 1" case common in MP-DPC using DCO. It is found the "D > 1" is caused by the wrong control action of the active power in the starting period of each sector. Furthermore, a new table containing an additional pre-calculated interval in every sector is developed to eradicate the "D > 1" case and its associated power quality issues. Both simulation and experimental results are included to demonstrate the effectiveness of the new table.
Huang Y, Tan S-C, Hui SY, 2019, Multiphase-Interleaved High Step-Up DC/DC Resonant Converter for Wide Load Range, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 34, Pages: 7703-7718, ISSN: 0885-8993
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- Citations: 22
Chen J, Yan S, Yang T, et al., 2019, Practical evaluation of droop and consensus control of distributed electric springs for both voltage and frequency regulation in microgrid, IEEE Transactions on Power Electronics, Vol: 34, Pages: 6947-6959, ISSN: 0885-8993
Electric spring (ES) was originally proposed as a distributed demand-side management (DSM) technology for stabilizing power distribution network in the presence of intermittent power generation without using communication. This paper explores the practical use of consensus control for a cluster of electric springs (ESs) through a WiFi communication layer for new functions not previously realized in practice. This approach can be considered as a form of DSM for smart grid technology. A novel consensus control is introduced to enable distributed ES circuits to provide local voltage and system frequency regulations in a microgrid with shared responsibility of active and reactive power compensation. The practical implementation details of consensus control for a cluster of ESs are addressed. New plug-and-play functions of ESs are practically demonstrated for the first time under consensus control. Practical results indicate that droop control (without communication) and consensus control (with communication) are complementary. Under normal condition when the communication network is available, distributed ESs can perform with shared power compensation efforts based on consensus control. If the communication network fails, ESs can revert to perform under droop control.
Qi W, Li S, Tan SC, et al., 2019, A single-phase three-level flying-capacitor PFC rectifier without electrolytic capacitors, IEEE Transactions on Power Electronics, Vol: 34, Pages: 6411-6424, ISSN: 0885-8993
A component-minimized and low-voltage-stress single-phase PFC rectifier without electrolytic capacitor is proposed in this paper. Component minimization is achieved by embedding an active pulsating-power-buffering (PPB) function within each switching period, such that typical add-on power electronic circuits for PPB is no longer needed. Additionally, with a three-level flying-capacitor configuration, the voltage stresses of switching devices can be reduced more than 50% as compared to existing solutions that are based on embedded PPB. The relationship between the inductance requirement and the patterns of the modulation carriers, and how it can be utilized to minimize the magnetics of the rectifier, is also discussed. A 110 W hardware prototype is designed and tested to demonstrate the feasibilities of the proposed rectifier. An input power factor of over 0.97, peak efficiency of 95.1%, and output voltage ripple of less than 4.3%, across a wide load range have been experimentally obtained.
Chen T, Lee C-K, Hui SYR, 2019, A General Design Procedure for Multi-Parallel Modular Grid-Tied Inverters System to Prevent Common and Interactive Instability, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 34, Pages: 6025-6030, ISSN: 0885-8993
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- Citations: 18
Guo J, Chaudhuri B, Hui S, 2019, Flexible demand through point-of-load voltage control in domestic sector, IEEE Transactions on Smart Grid, Vol: 10, Pages: 4662-4672, ISSN: 1949-3061
Demand reduction through voltage control at substations is commonly used. However, during high loading conditions the allowable depth of voltage reduction could be limited by the large voltage drop across the feeders. Distributed voltage control at the points of connection of individual loads (e.g. supply point of a cluster of domestic customers) allows larger flexibility in demand especially, during high loading as demonstrated in this paper. A high-resolution stochastic demand model and the aggregate power-voltage sensitivity of individual domestic customers are used to compare the demand reduction capability of point-of-load voltage control (PVC) against voltage control at substation (VCS). The rating of the voltage compensators required for PVC is evaluated to weigh the benefits against the required investment. First, the results are shown on a generic low voltage network with random distribution of clusters of domestic customers at various buses and random length of feeder segments to draw general conclusions. Then, the Cigre benchmark medium-and low-voltage (MV/LV) networks are used to substantiate the findings. A case study on an islanded microgrid is presented to show that PVC reduces frequency variations caused by fluctuating wind power generation.
Yang T, Mok KT, Ho SS, et al., 2019, Use of integrated photovoltaic-electric spring system as a power balancer in power distribution networks, IEEE Transactions on Power Electronics, Vol: 34, Pages: 5312-5324, ISSN: 0885-8993
IEEE Electric springs (ES) have been proposed as a demand-response technology for improving the stability and power quality of emerging power systems with high penetration of intermittent renewable energy sources (RES). Existing ES applications mainly involve the regulations of grid voltage and utility frequency. This paper reports a power control and balancing technique for a new integrated configuration of ES and photovoltaic (PV) system, and discusses its possible use to achieve dynamic supply-demand balance in power distribution networks. The proposed system enables delivery of maximally-harvested PV power to the grid via the ES, and concurrently controls the active power consumption of its ES-associated smart load so as to achieve supply-demand power balance of the overall system in real time. Importantly, battery storage is not necessary in the proposed design because the ES-associated smart-load power follows an appropriate consumption profile to compensate potential prediction errors of the PV power generation. Both simulation and experimental results are included to validate the proposed ES system.
Li S, Qi W, Wu J, et al., 2019, Minimum active switch requirements for single-phase PFC rectifiers without electrolytic capacitors, IEEE Transactions on Power Electronics, Vol: 34, Pages: 5524-5536, ISSN: 0885-8993
Active pulsating power buffering (PPB) function can effectively reduce the twice-line frequency energy storage requirement in a single-phase rectifier. Existing single-phase solutions with active PPB must utilize more than two active switches in their circuits. Compared with conventional single-active-switch solutions without active PPB (e.g. a boost PFC rectifier), the cost of additional semiconductor switches and gate drive circuitry in an active PPB-based rectifier may not be justified for low power applications. This paper presents a family of single-switch single-phase rectifier with active PPB. Taking advantage of the on-time and off-time of a single switch, the proposed rectifiers are formulated by merging two converters which are respectively duty and frequency controlled. The steady-state characteristics of these converters are analyzed. A step-by-step design procedure is provided, and an active control method for limiting the maximum switching frequency for wide-load-range operation is presented. A 100-W prototype is built for demonstration of the proposed single-switch rectifier concept. It is envisaged that this concept, when combined with other circuit formulation techniques, e.g., partial power processing, dc-voltage feedback, may lead to new derivatives of single-switch rectifiers with more advanced features.
Akhtar Z, Opatovsky M, Chaudhuri B, et al., 2019, Comparison of point-of-load vs. mid feeder compensation in lv distribution networks with high penetration of solar photovoltaic generation and electric vehicle charging stations, IET Smart Grid, Vol: 2, Pages: 283-292, ISSN: 2515-2947
Increasing use of distributed generation (DG), mainly roof-top photovoltaic (PV) panels and electric vehicle (EV) charg-ing would cause over- and under-voltage problems generallyat the remote sections of the low voltage (LV) distribution feeders. Asthese voltage problems are sustained for a few hours, power electronic compensators (PECs) with input voltage control,i.e. electricsprings can not be used due to the unavailability of non-critical loads that can be subjected to non-rated voltages for long durationof time. However, PECs in output voltage control mode could be used to inject a controllable series voltage either somewhereon the feeder (mid-feeder compensation, MFC) or between thefeeder and each customer (point-of-load compensation, PoLC)both of which are effective in tackling the voltage problem without disrupting PV power output and EV charging. In this paper, acomparison between the MFC and PoLC option is presented in terms of their voltage control capability, required compensatorcapacity, network losses, PV throughput, and demand response capability. The criteria for selection of optimal location of thesecompensators is also discussed. Stochastic demand profile for different types of residential customers in the UK and a typicalEuropean LV network is used for the case study.
Yuan H, Li S, Qi W, et al., 2019, On Nonlinear Control of Single-Phase Converters With Active Power Decoupling Function, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 34, Pages: 5903-5915, ISSN: 0885-8993
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- Citations: 33
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