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2024 CPSS and IEEE International Symposium on Energy Storage and Conversion, CPSS and ISESC 2024

作者： Zhou, Zhipeng Dai, Ning Yi University of Macau State Key Laboratory of Internet of Things for Smart City Department of Electrical and Computer Engineering Macao China

ISBN: (纸本)9798350380514

In many scenarios, most power electronics simulation tools cannot accurately track the output performance of modular multilevel converters (MMCs) during experimental verification. Therefore, this paper presents a digital twin (DT)-driven method leveraging hardware information to improve the simulation precision of MMCs. This DT model, which is developed on the Python/PSCAD co-simulation platform, not only facilitates the processing of experimental data, but also realizes the automatic control of simulation. The design principle of the proposed model is demonstrated using a physical three-phase MMC with carrier phase-shifted pulsewidth modulation (CPS-PWM). The results prove that compared with the traditional simulation model, the voltage and current performance of the DT model aligns more closely with that of the physical system. © 2024 IEEE.

关键词： Digital elevation model

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Coupon-based Demand Response for Consumers Facing Flat-rate Retail Pricing

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CSEE Journal of Power and Energy Systems 2024年第5期10卷 1887-1900页

作者： Hongxun Hui Yi Ding Kaining Luan Tao Chen Yonghua Song Saifur Rahman State Key Laboratory of Internet of Things for Smart City and the Department of Electrical and Computer Engineering University of MacaoMacao 999078China. College of Electrical Engineering Zhejiang UniversityHangzhou 310027China State Grid Jiangsu Electric Power Co. LTD.Nanjing 210000China School of Electrical Engineering Southeast UniversityNanjing 210096China Advanced Research Institute and Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State UniversityVA 22203USA

Even though smart meters have been widely used in power systems around the world,many consumers are still finding it hard to participate in demand response(DR)due to flat-rate retail pricing *** address this issue,this paper proposes a coupon-based demand response(CDR)scheme to achieve equivalent dynamic retail prices to inspire consumers’inherent ***,a security-constrained unit commitment optimization model is developed in the day-ahead market to obtain coupon rewards,which are then broadcast to consumers to motivate them to reschedule their power consumption *** evaluate the adjustment value of consumers’power consumption,a collective utility function is proposed to formulate the relationship between power quantity and coupon *** this basis,the security-constrained economic dispatch model is developed in the intra-day market to reschedule generating units’output power according to real-time load demands and fluctuating renewable *** the operation interval,a settlement method is developed to quantify consumers’electricity fees and coupon benefits on a monthly *** proposed CDR scheme avoids real-time iterative bidding process and effectively decreases the difficulty of massive,small consumers participating in *** proposed CDR is implemented in a realistic DR project in China to verify consumers’energy cost and renewables’curtailment can both be decreased.

关键词： Coupons demand response flat-rate retail pricing renewable energies small consumers

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Analysis and Design of Photovoltaic Integrated Fusion Topology 7

Analysis and Design of Photovoltaic Integrated Fusion Topolo...

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7th IEEE Student Conference on Electric Machines and Systems, SCEMS 2024

作者： Luo, Ruixin Yang, Ningrui Wong, Man-Chung University of Macau Department of Electrical and Computer Engineering China University of Macau State Key Laboratory of Internet of Things for Smart City China

ISBN: (纸本)9798350366945

A novel Photovoltaic (PV) integrated fusion topology is proposed in this paper. The flyback converter is utilized to elevate low PV output voltage to the desired level of fusion topology. Accordingly, the reactive and harmonic currents can be compensated, and the generated active power from PV can also be utilized on-site. Thus, the extra grid-tied inverter for PV can be saved while maintaining the advantages of fusion topology, e.g. lower power loss and ample capacity with the simple system design. The system configuration is presented by analyzing the DC-link voltage requirements in the fusion topology. Simulation results validate the feasibility of the proposed topology, which demonstrates the potential to enhance power network stability, support renewable energy integration, and foster sustainable power system development. © 2024 IEEE.

关键词： Fusion Topology Photovoltaic (PV) Systems Voltage Source Converters (VSCs)

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Integrated Load Consumption and PV Output Forecasting of Net-zero Energy Buildings Considering KNN-GAN Data Augmentation

Integrated Load Consumption and PV Output Forecasting of Net...

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2023 International Conference on Power Energy Systems and Applications, ICoPESA 2023

作者： Iao, Hou-Wang Lao, Keng-Weng University of Macau State Key Laboratory of Internet of Things for Smart City Department of Electrical and Computer Engineering China

ISBN: (纸本)9798350345605

Net-zero energy building (NZEB) is an emerging active carbon reduction solution. It achieves on-site renewable generations and zero balance between supply and demand. In NZEB, the photovoltaic (PV) accounts for the majority of distributed generations. However, its random and stochastic nature aggravates the accuracy of look-ahead PV output forecasting. Meanwhile, the spatial-temporal uncertainty of customers' electricity consumption can also result in improper load predictions. Besides, missing data in the late-model NZEB energy system enhances the difficulty of accurate forecasting. In this paper, a LSTM and Transformer-based forecasting models with K-nearest Neighbors (KNN) data interpolation and Generative Adversarial Network (GAN) data augmentation are demonstrated for load consumption and PV output forecasting of NZEB. The proposed framework obtains significant improvements in terms of root-mean-square error (RMSE) by 7.168 kW and 4.603 kW, in load and PV power forecasting respectively. © 2023 IEEE.

关键词： Forecasting

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Enhancing Power Decoupling Control of Grid-Connected Inverters Through Data-Driven Parameter Optimization 2

Enhancing Power Decoupling Control of Grid-Connected Inverte...

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2nd IEEE International Power Electronics and Application Symposium, PEAS 2023

作者： Zhu, Jiangge Lin, Gang Dai, Ningyi University of Macau State Key Laboratory of Internet of Things for Smart City Department of Electrical and Computer Engineering China University of Macau State Key Laboratory of Internet of Things for Smart City China

ISBN: (纸本)9798350313765

Grid-connected inverters typically employ a virtual impedance loop to facilitate power decoupling control. However, designing the control parameters to achieve optimal performance is a challenging task. This paper introduces a novel power decoupling index as a quantitative measure for evaluating the effectiveness of power decoupling control. The training dataset is generated under 800 sets of parameters by using Real Time Digital Simulators (RTDS). A deep neural network (DNN) surrogate model is developed to establish the relationship between control parameters and the power coupling index. To optimize the control parameters effectively, a Genetic Algorithm (GA) optimization process is employed based on the trained surrogate model. Simulation results are provided to verify the effectiveness of the control parameter optimization method. © 2023 IEEE.

关键词： Deep Neural Network Genetic Algorithm Parameter Optimization Power decoupling

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A Control Method of Multiport Cophase Railway Power Conditioner for Power Quality Regulation and Renewable Energy Integration

A Control Method of Multiport Cophase Railway Power Conditio...

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2024 China HVDC and Power Electronics Annual Meeting of Chinese Society of electrical engineering, DCPE 2024

作者： Li, Bingxue Lei, Ming Fan, Fangtao School of Electrical and Information Engineering Tianjin University Tianjin China State Key Laboratory of Internet of Things for Smart City Department of Electrical and Computer Engineering University of Macau China

ISBN: (纸本)9781837242689

This paper studies the control method of multiport railway power conditioner (RPC) for power quality regulation and renewable energy integration in cophase railway power system. The circuit topology, operating principle and control strategy of multiport RPC are described in detail. To solve the unbalanced active power distribution and negative sequence current (NSC) caused by the multi-active-bridge converter operating in open-loop resonant mode, a closed-loop NSC compensating method is proposed. The effectiveness of the proposed control method is verified by the simulation results. © The Institution of engineering & Technology 2024.

关键词： Cophase railway power system railway power conditioner renewable energy integration

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Achievable Rate Analysis and Optimization of Double-RIS Assisted Spatially Correlated MIMO with Statistical CSI

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China Communications 2025年第1期22卷 139-157页

作者： Xu Kaizhe Guo Jiajia Zhang Jun Jin Shi Ma Shaodan Department of Communications and Networking Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China State Key Laboratory of Internet of Things for Smart City University of MacaoMacao SARChina Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and TelecommunicationsNanjing 210003China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China State Key Laboratory of Internet of Things for Smart City and the Department of Electrical and Computer Engineering University of MacaoMacao SARChina

Reconfigurable intelligent surface(RIS)is a novel meta-material which can form a smart radio environment by dynamically altering reflection directions of the impinging electromagnetic *** the prior literature,the inter-RIS links which also contribute to the performance of the whole system are usually neglected when multiple RISs are *** this paper we investigate a general double-RIS assisted multiple-input multiple-output(MIMO)wireless communication system under spatially correlated non line-of-sight propagation channels,where the cooperation of the double RISs is also *** design objective is to maximize the achievable ergodic rate based on full statistical channel state information(CSI).Specifically,we firstly present a closedform asymptotic expression for the achievable ergodic rate by utilizing replica method from statistical *** a full statistical CSI-enabled optimal design is proposed which avoids high pilot training overhead compared to instantaneous CSI-enabled *** further reduce the signal processing overhead and lower the complexity for practical realization,a common-phase scheme is proposed to design the double *** results show that the derived asymptotic ergodic rate is quite accurate even for small-sized antenna *** the proposed optimization algorithm can achieve substantial gain at the expense of a low overhead and ***,the cooperative double-RIS assisted MIMO framework is proven to achieve superior ergodic rate performance and high communication reliability under harsh propagation environment.

关键词： common reflection pattern double RISs large system analysis MIMO replica method

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Design and Technical Development of Wall-Climbing Robots:A Review

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Journal of Bionic engineering 2022年第4期19卷 877-901页

作者： Yi Fang Shuai Wang Qiushi Bi Da Cui Chuliang Yan School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130025China State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering University of MacaoMacao 999078China

Once working at heights is dangerous,it is a significant *** accidents brought substantial economic losses and caused a large number of ***,it is essential to use wall-climbing robots to replace manual work at *** design of the wall-climbing robot is inspired by the climbing action of insects or *** intelligent bionic robot device can carry special equipment to operate on the wall and perform some dangerous operations instead of firefighters or inspection personnel more *** scope of application is *** paper firstly summarizes the research progress of wall-climbing robots with three different moving methods:wheel-climbing,crawler-based,and leg-footed robots;summarizes the applications and breakthroughs of four adsorption technologies:negative pressure,magnetic force,bionic and electrostatic;discusses the application of motion control algorithms in wall-climbing ***,the advantages and disadvantages of different migration modes and adsorption methods are pointed *** distribution and advantages of the combined application of different migration modes and adsorption methods are *** addition,the future development trend of wall-climbing robots and the promoting effect of bionic technology development on wall-climbing robots are *** content of this paper will provide helpful guidance for the research of wall-climbing robots.

关键词： Wall-climbing robot Walking method Adsorption technology Motion control technology Bionic

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Integrated Clustering and Routing Design and Triangle Path Optimization for UAV-Assisted Wireless Sensor Networks

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China Communications 2024年第4期21卷 178-192页

作者： Shao Liwei Qian Liping Wu Mengru Wu Yuan College of Information Engineering Zhejiang University of TechnologyHangzhou 310014China State Key Laboratory of Internet of Things for Smart City University of MacaoMacaoChina Department of Computer and Information Science University of MacaoMacaoChina

With the development of the Internet of Things(iot),it requires better performance from wireless sensor networks(WSNs),such as larger coverage,longer lifetime,and lower ***,a large amount of data generated from monitoring and long-distance transmission places a heavy burden on sensor nodes with the limited battery *** this,we investigate an unmanned aerial vehicles assisted mobile wireless sensor network(UAV-assisted WSN)to prolong the network lifetime in this ***,we use UAVs to assist the WSN in collecting *** the current UAV-assisted WSN,the clustering and routing schemes are determined ***,such a separate consideration might not maximize the lifetime of the whole WSN due to the mutual coupling of clustering and *** efficiently prolong the lifetime of the WSN,we propose an integrated clustering and routing scheme that jointly optimizes the clustering and routing *** the whole network space,it is intractable to efficiently obtain the optimal integrated clustering and routing ***,we propose the Monte-Las search strategy based on Monte Carlo and Las Vegas ideas,which can generate the chain matrix to guide the algorithm to find the solution *** point-to-point collection leads to long collection paths,so a triangle optimization strategy is then proposed that finds a compromise path to shorten the collection path based on the geometric distribution and energy of sensor *** avoid the coverage hole caused by the death of sensor nodes,the deployment of mobile sensor nodes and the preventive mechanism design are *** emergency data transmission mechanism is further proposed to reduce the latency of collecting the latency-sensitive data due to the absence of *** with the existing schemes,the proposed scheme can prolong the lifetime of the UAVassisted WSN at least by 360%,and shorten the collection path of UAVs by 56.24%.

关键词： Monte-Las search strategy triangle path optimization unmanned aerial vehicles wireless sensor networks

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Review of Hybrid Transformer Topology

Review of Hybrid Transformer Topology

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2023 IEEE PELS Students and Young Professionals Symposium, SYPS 2023

作者： Wan, Xin Wong, Man-Chung University of Macau State Key Laboratory of Internet of Things for Smart City Department of Electrical and Computer Engineering Faculty of Science and Technology China

ISBN: (纸本)9798350307832

Due to the rapid development of power electronics and new energy generation, conventional transformers cannot meet the higher requirements of intelligent grids due to a lack of controllability. While solid-state transformers (SSTs) are currently costly, making it impossible for them to be used widely in power networks. For this reason, a compromise solution of a hybrid transformer (HT) combining the traditional line frequency transformer (LFT) with power electronic devices has attracted more and more attention. Based on existing HT research, topologies of HT are classified according to installation position and connection type of power electronic devices. Rough theoretical analyses were carried out from the point of view of voltage compensation, current compensation, and power flow control. A review of HT topology in recent years is also included. © 2023 IEEE.

关键词： Topology

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