- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Contribution to the System Design of Contactless Energy Transfer Systems
摘要： In this contribution, a design procedure that is applicable to many kinds of wireless or contactless energy transfer systems is proposed. The design procedure is limited to near field wireless energy transfer systems in resonant operation. For this purpose, the input impedance and voltage transfer function of different natural frequencies are calculated analytically, and moreover, the behavior of the system is described. Following three issues lead to a readily applicable design procedure. First, the knowledge of the transfer functions. Secondly, the knowledge of basic magnetic properties and lastly, the known influence of harmonics according to rectifier and inverter. This design procedure is demonstrated with two hardware setups.
关键词： Inductive power transmission,power conversion harmonics,transfer functions,resonant inverters,inductive,charging
更新于2025-09-23 15:22:29
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[IEEE IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society - D.C., DC, USA (2018.10.21-2018.10.23)] IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society - Simultaneous Wireless Information and GaN-Based Power Transfer Exploiting a Dual Frequency Band
摘要： A simultaneous wireless information and power transfer system employing separated frequency bands for energy and data, dubbed dual-band SWIPT, is investigated. Elementary circuit elements are optimized numerically. An experimental testbed based on a gallium nitride (GaN) full-bridge converter demonstrates data rates in excess of 450 kbps employing on-off keying in conjunction with a simple diode detector for data recovery.
关键词： Inductive power transmission,SWIPT,Data communication,Inductive charging,Frequency division multiplexing
更新于2025-09-23 15:22:29
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NUMERICAL ESTIMATION OF THE COMPLEX REFRACTIVE INDEXES BY THE ALTITUDE DEPENDING ON WAVE FREQUENCY IN THE IONIZED REGION OF THE EARTH ATMOSPHERE FOR MICROWAVES INFORMATION AND POWER TRANSMISSIONS
摘要： The phase and group refractive indexes of microwaves in the ionosphere region of the earth atmosphere are very important for both the researching theoretical problems and practical problems in wireless information transmission (WIT) and wireless power transmission (WPT). So far, there have been many attempts devoted to discussing and determining characterizations of earth atmosphere’s ionosphere region including the refractive indexes of microwaves concerning their velocities in ionized region, unfortunately due to the complicated features of the ionosphere region leading to research task facing many challenges. Up to recent, there is still a lack of systematic numerical data of complex refractive index by altitude depending on high frequencies of the electromagnetic waves in the ionosphere region. This paper outlines some theoretical analyses and discussions of some theoretical aspects of the complex refractive index in atmosphere’s ionized region more in detail. Based on conductivities data and the complex relative permittivity by altitude determined previously, the numerically estimated data of complex refractive indexes by the altitude from 100 km up to 1000 km at the di?erent frequencies are also shown and discussed.
关键词： wireless information transmission,refractive index,microwaves,ionosphere,wireless power transmission
更新于2025-09-23 15:21:21
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Design of a Wide Ranging Highly Sensitive Pressure Sensor Based on Two-Dimensional Photonic Crystals
摘要： A highly sensitive pressure sensor operating over a wide pressure range based on two-dimensional photonic crystals having a Mach-Zehnder interferometer structure has been developed. The plane wave expansion method (PWE) is used to determine the device operating wavelength range. The finite difference time domain method (FDTD) is used to calculate the device characteristic parameters such as the resonant frequency, the power transmission, and the sensitivity. The present sensor has two wide frequency ranges, a high sensitivity to refractive index changes and the highest detectable sensitivity pressure so far reported in the literature, that is, 25.06 nm/GPa. The present device has high and constant transmission power all over the entire pressure range 0 to 10 GPa. This is of practical importance since the constraints imposed on the sensing system (the light source and the photodetector) are the same.
关键词： Power transmission,Sensitivity,Mach-Zehnder interferometer,Pressure sensor,2-D photonic crystals,FDTD
更新于2025-09-23 15:21:21
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[IEEE 2019 IEEE Power & Energy Society General Meeting (PESGM) - Atlanta, GA, USA (2019.8.4-2019.8.8)] 2019 IEEE Power & Energy Society General Meeting (PESGM) - A New Remote Tap Position Estimation Approach for Open-Delta Step-Voltage Regulator in a Photovoltaic Integrated Distribution Network
摘要： We describe the general concept and practical feasibility of a dc-based open energy system (OES) that proposes an alternative way of exchanging intermittent energy between houses in a local community. Each house is equipped with a dc nanogrid, including photovoltaic panels and batteries. We extend these nanogrids with a bidirectional dc–dc converter and a network controller so that power can be exchanged between houses over an external dc power bus. In this way, demand-response fluctuations are absorbed not only by the local battery, but can be spread over all batteries in the system. By using a combination of voltage and current controlled units, we implemented a higher-level control software independent from the physical process. A further software layer for autonomous control handles power exchange based on a distributed multiagent system, using a peer-to-peer like architecture. In parallel to the software, we made a physical model of a four-node OES on which different power exchange strategies can be simulated and compared. First results show an improved solar replacement ratio, and thus a reduction of ac grid consumption thanks to power interchange. The concept’s feasibility has been demonstrated on the first three houses of a full-scale OES platform in Okinawa.
关键词： microgrid,power transmission,power system control,dc interconnected power system,smart grid,dc power distribution,DC–DC converter
更新于2025-09-23 15:21:01
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Light trapping for photovoltaic cells used for optical power transmission
摘要： Photovoltaic (PV) cells used for optical power transmission convert laser light incident from limited directions to electricity. This illumination condition is in contrast to that for solar cells. A combination of an angular selective filter consisting of a dielectric multilayer on the front surface and a diffuse reflector on the rear surface significantly traps both the incident laser light into and radiation from the PV cell. This light trapping effect can improve the monochromatic conversion efficiency of a GaAs PV cell by 9% (absolute) compared with that for the ×4n2 trapping, under 872 nm and 1 W cm?2 laser illumination.
关键词： GaAs,light trapping,conversion efficiency,optical power transmission,photovoltaic cells
更新于2025-09-23 15:21:01
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[IEEE 2019 IEEE International Symposium on Measurement and Control in Robotics (ISMCR) - Houston, TX, USA (2019.9.19-2019.9.21)] 2019 IEEE International Symposium on Measurement and Control in Robotics (ISMCR) - Eliminating residual sway of crane loads based on laser slot sensor information
摘要： Despite the significant attention transmission switching (TS) has gained over the last decade, important challenges remain. This paper addresses the state-of-the-art challenges of TS by studying the benefits of corrective switching using authentic Independent System Operator of New England (ISO-NE) data and software. Thus, the results and analyses presented in this paper are more convincing than any other study conducted to date. TS is successfully implemented for reliability applications as a corrective mechanism. ISO-NE maintains N?1 reliability based on the preventive dispatch and enforcing proxy reserve requirements along with N?1?1 reliability based on reserves and interface limits. This paper incorporates TS as a corrective mechanism in response to both the N?1 and N?1?1 events. Not only does this paper investigate the capability of corrective switching to alleviate thermal overloads but also the economic benefits of corrective switching with actual market data and in-house market software at ISO-NE. The results show that corrective TS can improve the reliability of the system and save millions of dollars each year by providing a cheaper corrective action alternative for ISO-NE. The results also suggest that TS would provide more significant benefits for systems with more transmission congestion such as Pennsylvania New Jersey Maryland, Midcontinent Independent System Operator, and Electric Reliability Council of Texas.
关键词： power system economics,transmission switching,power system reliability,Interface limits,power transmission control
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Fault Current Correction Strategies for Effective Fault Location in Inverter-Based Systems
摘要： Despite the significant attention transmission switching (TS) has gained over the last decade, important challenges remain. This paper addresses the state-of-the-art challenges of TS by studying the benefits of corrective switching using authentic Independent System Operator of New England (ISO-NE) data and software. Thus, the results and analyses presented in this paper are more convincing than any other study conducted to date. TS is successfully implemented for reliability applications as a corrective mechanism. ISO-NE maintains N?1 reliability based on the preventive dispatch and enforcing proxy reserve requirements along with N?1?1 reliability based on reserves and interface limits. This paper incorporates TS as a corrective mechanism in response to both the N?1 and N?1?1 events. Not only does this paper investigate the capability of corrective switching to alleviate thermal overloads but also the economic benefits of corrective switching with actual market data and in-house market software at ISO-NE. The results show that corrective TS can improve the reliability of the system and save millions of dollars each year by providing a cheaper corrective action alternative for ISO-NE. The results also suggest that TS would provide more significant benefits for systems with more transmission congestion such as Pennsylvania New Jersey Maryland, Midcontinent Independent System Operator, and Electric Reliability Council of Texas.
关键词： power system reliability,Interface limits,power transmission control,transmission switching,power system economics
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 13th International Conference on ASIC (ASICON) - Chongqing, China (2019.10.29-2019.11.1)] 2019 IEEE 13th International Conference on ASIC (ASICON) - Design of Current-Assisted Photonic Demodulator (CAPD) for Time-of-Flight CMOS Image Sensor
摘要： Despite the significant attention transmission switching (TS) has gained over the last decade, important challenges remain. This paper addresses the state-of-the-art challenges of TS by studying the benefits of corrective switching using authentic Independent System Operator of New England (ISO-NE) data and software. Thus, the results and analyses presented in this paper are more convincing than any other study conducted to date. TS is successfully implemented for reliability applications as a corrective mechanism. ISO-NE maintains N?1 reliability based on the preventive dispatch and enforcing proxy reserve requirements along with N?1?1 reliability based on reserves and interface limits. This paper incorporates TS as a corrective mechanism in response to both the N?1 and N?1?1 events. Not only does this paper investigate the capability of corrective switching to alleviate thermal overloads but also the economic benefits of corrective switching with actual market data and in-house market software at ISO-NE. The results show that corrective TS can improve the reliability of the system and save millions of dollars each year by providing a cheaper corrective action alternative for ISO-NE. The results also suggest that TS would provide more significant benefits for systems with more transmission congestion such as Pennsylvania New Jersey Maryland, Midcontinent Independent System Operator, and Electric Reliability Council of Texas.
关键词： power system economics,transmission switching,power system reliability,Interface limits,power transmission control
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE Power & Energy Society General Meeting (PESGM) - Atlanta, GA, USA (2019.8.4-2019.8.8)] 2019 IEEE Power & Energy Society General Meeting (PESGM) - A Combined Optimization Structure of Adaptive Neuro-fuzzy Inference System for Probabilistic Photovoltaic Power Forecasting
摘要： We describe the general concept and practical feasibility of a dc-based open energy system (OES) that proposes an alternative way of exchanging intermittent energy between houses in a local community. Each house is equipped with a dc nanogrid, including photovoltaic panels and batteries. We extend these nanogrids with a bidirectional dc–dc converter and a network controller so that power can be exchanged between houses over an external dc power bus. In this way, demand-response ?uctuations are absorbed not only by the local battery, but can be spread over all batteries in the system. By using a combination of voltage and current controlled units, we implemented a higher-level control software independent from the physical process. A further software layer for autonomous control handles power exchange based on a distributed multiagent system, using a peer-to-peer like architecture. In parallel to the software, we made a physical model of a four-node OES on which different power exchange strategies can be simulated and compared. First results show an improved solar replacement ratio, and thus a reduction of ac grid consumption thanks to power interchange. The concept’s feasibility has been demonstrated on the ?rst three houses of a full-scale OES platform in Okinawa.
关键词： dc power distribution,microgrid,DC–DC converter,power transmission,power system control,smart grid,dc interconnected power system
更新于2025-09-19 17:13:59