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光无线能量传输技术综述 Review

Syed Agha Hassnain MOHSAN1, Haoze QIAN2, Hussain AMJAD3

《信息与电子工程前沿（英文）》 2023年第24卷第6期页码 767-800 doi: 10.1631/FITEE.2100443

摘要：近几十年来，开创性的光无线能量传输（OWPT）技术在学术界和业内专家中都得到广泛关注。通过激光二极管（LDs）对操作设备或电池远程供电有很多优点。远程LDs可以消除额外携带电池的负担，同时可以通过减少电池更换与充电的时间来节省任务时间。然而激光能量传输（LPT）除了具有吸引人的优点外，因其传输效率低，仍然是一项具有挑战性的任务。此篇综述讨论了OWPT的必要性和可行性，并讨论了其工作原理、系统设计和组件等。此外，还表明了OWPT是为物联网（IoT）终端供电的必要部分，强调了动态OWPT的影响。本文概述了几种OWPT技术，包括光波束赋形、分布式激光充电（DLC）、自适应分布式激光充电（ADLC）、同步无线信息与功率传输（SLIPT）、物对物（T2T）OWPT和高强度激光能量束（HILPB），还论述了OWPT系统的激光选择、危害分析和接收器太阳能电池的选择。最后，讨论了一系列公开挑战和应对措施。我们相信，此篇综述将有助于整合研究和消除技术不确定性，从而促进OWPT技术发展的进步和创新。

关键词：无线能量传输；光无线能量传输；分布式激光充电；激光二极管；太阳能电池

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无线能量传输回复式反射波束成形中多个移动目标导频信号的区分研究 Article

Xin Wang, Long Li, Tie Jun Cui, Mingyu Lu

《工程（英文）》 2023年第30卷第11期页码 55-62 doi: 10.1016/j.eng.2023.08.010

摘要：

An experimental study is conducted on several retro-reflective beamforming schemes for wireless power transmission to multiple wireless power receivers (referred to herein as "targets"). The experimental results demonstrate that, when multiple targets broadcast continuous-wave pilot signals at respective frequencies, a retro-reflective wireless power transmitter is capable of generating multiple wireless power beams aiming at the respective targets as long as the multiple pilot signals are explicitly separated from one another by the wireless power transmitter. However, various practical complications are identified when the pilot signals of multiple targets are not appropriately differentiated from each other by the wireless power transmitter. Specifically, when multiple pilot signals are considered to be carried by the same frequency, the wireless power transmission performance becomes heavily dependent on the interaction among the pilot signals, which is highly undesirable in practice. In conclusion, it is essential for a retro-reflective wireless power transmitter to explicitly discriminate multiple targets' pilot signals among each other.

关键词： Wireless power transmission Microwave antenna array Retro-reflective beamforming Pilot signal Multiple access

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Effects of environmental media on the transmission of an inductive link in wireless microsystems

Lei DONG, Li-Feng WANG, Qing-An HUANG

《机械工程前沿（英文）》 2017年第12卷第4期页码 554-556 doi: 10.1007/s11465-017-0450-1

摘要：

An inductive link between two magnetically coupled coils in wireless microsystems is modeled by considering an additional parasitic capacitive link to describe the effect of environmental media. With a system of inductor-capacitor passive wireless sensors, the effects of environmental media are studied theoretically and experimentally for the first time. Results suggest that the capacitive link is non-negligible when the distance between the two coupled coils is comparable with the coupling area, particularly when the environmental medium has a large dielectric constant.

关键词： capacitive link monitoring correction passive wireless sensor

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Efficient utilization of wind power: Long-distance transmission or local consumption?

Yuanzhang SUN, Xiyuan MA, Jian XU, Yi BAO, Siyang LIAO

《机械工程前沿（英文）》 2017年第12卷第3期页码 440-455 doi: 10.1007/s11465-017-0440-3

摘要：

Excess wind power produced in wind-intensive areas is normally delivered to remote load centers via long-distance transmission lines. This paper presents a comparison between long-distance transmission, which has gained popularity, and local energy consumption, in which a fraction of the generated wind power can be locally consumed by energy-intensive industries. First, the challenges and solutions to the long-distance transmission and local consumption of wind power are presented. Then, the two approaches to the utilization of wind power are compared in terms of system security, reliability, cost, and capability to utilize wind energy. Finally, the economic feasibility and technical feasibility of the local consumption of wind power are demonstrated by a large and isolated industrial power system, or supermicrogrid, in China. The coal-fired generators together with the short-term interruptible electrolytic aluminum load in the supermicrogrid are able to compensate for the intermittency of wind power. In the long term, the transfer of high-energy-consumption industries to wind-rich areas and their local consumption of the available wind power are beneficial.

关键词： wind power long-distance transmission local consumption supermicrogrid

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Analysis of resonant coupling coil configurations of EV wireless charging system: a simulation study

M. LU, A. JUNUSSOV, M. BAGHERI

《能源前沿（英文）》 2020年第14卷第1期页码 152-165 doi: 10.1007/s11708-019-0615-1

摘要： Nowadays, internal combustion engine vehicles are considered as one of the major contributors to air pollution. To make transportation more environmentally friendly, plug-in electric vehicles (PEVs) have been proposed. However, with an increase in the number of PEVs, the drawbacks associated with the cost and size, as well as charging cables of batteries have arisen. To address these challenges, a novel technology named wireless charging system has been recently recommended. This technology rapidly evolves and becomes very attractive for charging operations of electric vehicles. Currently, wireless charging systems offer highly efficient power transfer over the distances ranging from several millimeters to several hundred millimeters. This paper is focused on analyzing electromagnetically coupled resonant wireless technique used for the charging of EVs. The resonant wireless charging system for EVs is modeled, simulated, and then examined by changing different key parameters to evaluate how transfer distance, load, and coil’s geometry, precisely number of coil’s turns, coil’s shape, and inter-turn distance, influence the efficiency of the charging process. The simulation results are analyzed and critical dimensions are discussed. It is revealed that a proper choice of the dimensions, inter-turn distance, and transfer distance of the coil can result in a significant improvement in charging efficiency. Furthermore, the influence of the transfer distance, frequency, load, as well as the number of the turns of the coil on the performance of wireless charging system is the main focus of this paper.

关键词： electromagnetically coupled resonator near-field power transfer wireless power transfer (WPT)

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Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission

《机械工程前沿（英文）》 2023年第18卷第2期 doi: 10.1007/s11465-022-0735-x

摘要： Servo-hydraulic actuators (SHAs) are widely used in mechanical equipment to drive heavy-duty mechanisms. However, their energy efficiency is low, and their motion characteristics are inevitably affected by uncertain nonlinearities. Electromechanical actuators (EMAs) possess superior energy efficiency and motion characteristics. However, they cannot easily drive heavy-duty mechanisms because of weak bearing capacity. This study proposes and designs a novel electromechanical-hydraulic hybrid actuator (EMHA) that integrates the advantages of EMA and SHA. EMHA mainly features two transmission mechanisms. The piston of the hydraulic transmission mechanism and the ball screw pair of the electromechanical transmission mechanism are mechanically fixed together through screw bolts, realizing the integration of two types of transmission mechanisms. The control scheme of the electromechanical transmission mechanism is used for motion control, and the hydraulic transmission mechanism is used for power assistance. Then, the mathematical model, structure, and parameter design of the new EMHA are studied. Finally, the EMHA prototype and test platform are manufactured. The test results prove that the EMHA has good working characteristics and high energy efficiency. Compared with the valve-controlled hydraulic cylinder system, EMHA exhibits a velocity tracking error and energy consumption reduced by 49.7% and 54%, respectively, under the same working conditions.

关键词： electromechanical-hydraulic hybrid actuator (EMHA) integration transmission mechanisms power assistance energy efficiency working characteristics

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Integrated transmission and generation planning model in a deregulated environment

Enrique B. CEDE?O, Sant ARORA

《能源前沿（英文）》 2013年第7卷第2期页码 182-190 doi: 10.1007/s11708-013-0256-8

摘要： After the deregulation of the Power Sector in the U.S., planning for generation and transmission capacities is decentralized. There is, however, still need for the long term integrated planning of generation and transmission capacities at the macro level, since these two sectors must operate in a coordinated manner. This paper presents a model for integrating generation and transmission expansion planning to identify an indicative expansion plan for the total sector at the macro level. The argument for an integrated model is supported using evidence from integrated planning efforts in real life systems. The application of the proposed model is illustrated using an example that requires expansion of generation and transmission capacities over three regions in a deregulated power system. The example considers that addition of generating capacity should come from renewable sources. The test results show the potential cost saving from integrated planning.

关键词： integrated planning indicative plans power generation transmission deregulation

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Secure analysis on artificial-noise-aided simultaneous wireless information and power transfer systems

Wei-min Hou, Qing-shan Tang,cstqs001@126.com

《信息与电子工程前沿（英文）》 2020年第21卷第11期页码 1535-1670 doi: 10.1631/FITEE.2000083

摘要： In this paper, we investigate the secrecy outage performance in (SWIPT) systems taking assistance into account. Multiple antennas in the source and a single antenna in both the legitimate receiver and the eavesdropper are assumed. Specifically, the transmitted signal at the source is composed of two parts, where the first part is the information symbols and the other is the noise for the eavesdropper. To avoid making noise in the legitimate receiver, these two parts in the transmitted signals are modulated into two orthogonal dimensions according to the instantaneous channel state between the source and the legitimate receiver. We derive an approximate closed-form expression for the (SOP) by adopting the Gauss-Laguerre quadrature (GLQ) method, where the gap between the exact SOP and our approximate SOP converges with increase of the summation terms in the GLQ. To obtain the secrecy diversity order and secrecy array gain for the considered SWIPT system, the asymptotic result of the SOP is also derived. This is tight in the high signal-to-noise ratio region. A novel and robust SOP approximation is also analyzed given a small variance of the signal-to-interference-plus-noise ratio at the eavesdropper. Some selected Monte-Carlo numerical results are presented to validate the correctness of the derived closed-form expressions.

关键词：人工噪声；多天线系统；保密中断概率；无线携能

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Availability growth models and verification of power equipment

Jinyuan SHI, Jiamin XU

《能源前沿（英文）》 2021年第15卷第2期页码 529-538 doi: 10.1007/s11708-019-0624-0

摘要： The general availability growth models for large scale complicated repairable system such as electric generating units, power station auxiliaries, and transmission and distribution installations are presented. The calculation formulas for the maintenance coefficient, mathematical expressions for general availability growth models, ways for estimating, and fitting on checking the parameters of the model are introduced. Availability growth models for electric generating units, power station auxiliaries, and transmission and distribution installations are given together with verification examples for availability growth models of 320–1000 MW nuclear power units and 1000 MW thermal power units, 200–1000 MW power station auxiliaries, and 220–500 kV transmission and distribution installations. The verification results for operation availability data show that the maintenance coefficients for electric generating units, power station auxiliaries, transmission and distribution installations conform to the power function, and general availability growth models conform to rules of availability growth tendency of power equipment.

关键词： repairable system power equipment electric generating unit power station auxiliary transmission and distribution installation reliability availability availability growth model

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Enhancing power transfer capability through flexible AC transmission system devices: a review

Fadi M. ALBATSH,Saad MEKHILEF,Shameem AHMAD,H. MOKHLIS,M. A. HASSAN

《信息与电子工程前沿（英文）》 2015年第16卷第8期页码 658-678 doi: 10.1631/FITEE.1500019

摘要： Global demand for power has significantly increased, but power generation and transmission capacities have not increased proportionally with this demand. As a result, power consumers suffer from various problems, such as voltage and frequency instability and power quality issues. To overcome these problems, the capacity for available power transfer of a transmission network should be enhanced. Researchers worldwide have addressed this issue by using flexible AC transmission system (FACTS) devices. We have conducted a comprehensive review of how FACTS controllers are used to enhance the available transfer capability (ATC) and power transfer capability (PTC) of power system networks. This review includes a discussion of the classification of different FACTS devices according to different factors. The popularity and applications of these devices are discussed together with relevant statistics. The operating principles of six major FACTS devices and their application in increasing ATC and PTC are also presented. Finally, we evaluate the performance of FACTS devices in ATC and PTC improvement with respect to different control algorithms.

关键词： FACTS devices Available transfer capability Power transfer capability Artificial intelligence

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微波无线传能技术

段宝岩, 黄漪

《工程（英文）》 2023年第30卷第11期页码 1-2 doi: 10.1016/j.eng.2023.09.009

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微波无线能量收集技术——统一模型、自动化整流天线设计及前沿技术 Review

Si-Ping Gao, Jun-Hui Ou, Xiuyin Zhang, Yongxin Guo

《工程（英文）》 2023年第30卷第11期页码 32-48 doi: 10.1016/j.eng.2023.05.019

摘要：

While sufficient review articles exist on inductive short-range wireless power transfer (WPT), long-haul microwave WPT (MWPT) for solar power satellites, and ambient microwave wireless energy harvesting (MWEH) in urban areas, few studies focus on the fundamental modeling and related design automation of receiver systems. This article reviews the development of MWPT and MWEH receivers, with a focus on rectenna design automation. A novel rectifier model capable of accurately modeling the rectification process under both high and low input power is presented. The model reveals the theoretical boundary of radio frequency-to-direct current (dc) power conversion efficiency and, most importantly, enables an automated system design. The automated rectenna design flow is sequential, with the minimal engagement of iterative optimization. It covers the design automation of every module (i.e., rectifiers, matching circuits, antennae, and dc–dc converters). Scaling-up of the technique to large rectenna arrays is also possible, where the challenges in array partitioning and power combining are briefly discussed. In addition, several cutting-edge rectenna techniques for MWPT and MWEH are reviewed, including the dynamic range extension technique, the harmonics-based retro-directive technique, and the simultaneous wireless information and power transfer technique, which can be good complements to the presented automated design methodology.

关键词：微波无线能量传输微波无线能量收集统一整流器模型自动化整流天线设计新兴整流天线技术

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大规模海上风电的非并网多元化应用研究——变海上风电场输电上岸为直接输产品上岸的探索

顾为东

《中国工程科学》 2010年第12卷第11期页码 78-82

摘要：

针对海上风电大规模发展成本高、并网难、故障概率高的瓶颈，提出了一种海上大规模风电非并网多元化应用系统。该系统突破海上大规模风电并网的单一应用模式，通过必要的技术创新与集成，将大规模海上风电与高载能产业（如海水淡化、电解水制氢和电解铝等）直接耦合形成一个完整的新系统，变海上风电场输电上岸为直接输产品上岸，不仅破解了大规模、超大规模海上风电应用难题，而且大幅度节省海上风电场投资成本，提高了风电利用效率，具有十分重要的现实和战略意义。

关键词：海上风电非并网海水淡化制氢电解铝

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Parameter identification of interconnected power system frequency after trip-out of high voltage transmission

Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG

《能源前沿（英文）》 2014年第8卷第3期页码 386-393 doi: 10.1007/s11708-014-0323-9

摘要： Accurate modeling and parameters of high voltage (HV) grid are critical for stability research of system frequency. In this paper, simulation modeling of the system frequency was conducted of an interconnected power system with HV transmission lines in China. Based on recorded tripping data of the HV transmission lines, system parameters were identified by using genetic algorithm (GA). The favorable agreement between simulation results and recorded data verifies the validity of gird models and the accuracy of system parameters. The results of this paper can provide reference for the stability research of HV power grid.

关键词： high voltage (HV) grid frequency stability parameter identification primary frequency regulation (PFR)

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大规模海上风电并网送出策略研究

张占奎,石文辉,屈姬贤,白宏

《中国工程科学》 2021年第23卷第4期页码 182-190 doi: 10.15302/J-SSCAE-2021.04.021

摘要：

海上风电是世界风电未来发展的重要方向，经济高效地解决大规模海上风电并网问题是海上风电建设面临的核心挑战之一。本文总结了世界海上风电的发展现状、我国海上风电发展环境及行业进展，归纳了海上风电的全球性发展趋势；从海上风电场单场典型并网、大规模海上风电集群送出两类典型情景出发，梳理了相关技术特征及其代表性应用。在凝练我国海上风电并网送出面临问题的基础上，提出了我国海上风电并网的整体发展策略，并就两类典型情景的送出方案开展适应性分析和评价。研究建议，摸清资源储量、确定统一规划理念，加强自主创新、突破并网关键技术，完善体制机制、确保高质量发展，加强国际交流、促进国际产业合作，以此谋划和建设一流水平、契合国情的海上风电并网送出工程，更好支撑我国能源转型发展。

关键词：海上风电集群并网送出规划方案适应性分析