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IAENG International Journal of Computer science 2024年第3期51卷 222-231页

作者： Hu, Yaping Lin, Yiqian Nie, Yongquan Peng, Chaoyi He, Yubin Liu, Yuxuan Ma, Guang Seng, Dewen senior engineer of Power dispatch and control Center China Southern Power Grid Guangzhou510623 China School of Computer Science and Technology Hangzhou Dianzi University Hangzhou310018 China senior engineer of Power dispatch and control Center China Southern Power Grid Guangzhou510623 China senior engineer of Power dispatch and control Center China Southern Power Grid Guangzhou510623 China Power dispatch and control Center China Southern Power Grid Guangzhou510623 China Power dispatch and control Center China Southern Power Grid Guangzhou510623 China Guang Ma is an engineer of Power dispatch and control Center China Southern Power Grid Guangzhou510623 China School of Computer Science and Technology Hangzhou Dianzi University Hangzhou310018 China

As china's electricity market continues to evolve, the increasing number and diversity of market participants have led to a rapid increase in data volume. An immediate challenge is designing a robust blockchain system that ensures not only the transparency, credibility, tamper-resistance, traceability, privacy, and security of substantial market data in a complex environment, but also provides trusted data support for intelligent dispatching within the power market. This paper proposes a solution to this pressing issue through Blockchain as a Service (BaaS). BaaS leverages the capabilities of cloud computing platforms to enhance the ease and efficiency of deploying and operating blockchain systems. Specifically, the paper introduces a BaaS system built upon an integrated intelligent scheduling and operation cloud-edge platform (CEP). It incorporates technological solutions such as data on-chain, trusted comparison, edge cluster data transmission, optimized transaction authentication, and lightweight storage nodes. Rigorous testing has conclusively demonstrated that the proposed BaaS system meets the requirements of the digital transformation of the china southern power grid, and provides robust technical support for its future practical applications. © (2024), (International Association of Engineers). All Rights Reserved.

关键词： Blockchain

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Mid- and High-frequency Resonance Characteristics and Suppression Strategies of VSC-UHVDC for Large-scale Renewable Energy Transmission

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Journal of Modern power Systems and Clean Energy 2024年第6期12卷 2058-2070页

作者： Junjie Feng Wang Xiang Jinyu Wen Chuang Fu Qingming Xin Xiaobin Zhao Changyue Zou Biyue Huang Zhiyong Yuan School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhanChina Electric Power Research Institute China Southern Power Grid Co.Ltd.GuangzhouChina

Mid-and high-frequency resonance(MHFR)is highly likely to occur at the sending end of voltage source con-verter-based ultra-high voltage direct current(VSC-UHVDC)for large-scale renewable energy *** is of great im-portance to investigate the resonance characteristics and the corresponding suppression ***,this paper intro-duces the overall'control scheme of VSC-UHVDC for large-scale renewable energy ***,the impedance mod-els of VSC under grid-forming control with AC voltage coordi-nated control are *** mid-and high-frequency im-pedance characteristics of VSC-UHVDC are *** key factors affecting the impedance characteristics have been re-vealed,including the AC voltage control,the voltage feedfor-ward,the inner current loop,the positive-sequence and nega-tive-sequence independent control(PSNSIC),and the control *** MHFR characteristics at the sending-end system are analyzed in the whole operation process,including the black start and the normal power transmission *** integrat-ed control scheme is proposed to address the MHFR ***,extensive case studies are conducted on a planned VSC-UHVDC project to verify the theoretical analysis.

关键词： Large-scale renewable energy voltage source converter-based ultra-high voltage direct current(UHVDC) mid-and high-frequency resonance suppression measure

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TRANSIENT CONTROL AND PROTOTYPE VERIFICATION OF HIGH CAPACITY IGCT-DCT WITH QUASI-ZERO SWITCHING LOSS 20

TRANSIENT CONTROL AND PROTOTYPE VERIFICATION OF HIGH CAPACIT...

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20th International Conference on AC and DC power Transmission 2024, ACDC 2024

作者： Ma, Yiqing Zhao, Biao Cui, Bin Tang, Xueteng Dong, Liang Zhang, Long Huang, Zhisong Yang, Weihong Cheng, Chuanhui Department of Electrical Engineering Tsinghua University Beijing China Science and Technology Projects of China Southern Power Grid Guangzhou China

ISBN: (纸本)9781837242672

In this paper, DC transformer based on IGCT and lossless buffer capacitor (IGCT-DCT) and transient control for IGCT-DCT;are proposed. In IGCT-DCT, the loss of zero voltage switching (ZVS)under light load or no load is solved through soft converter modulation (SCM) based on minimum backflow power injection, and the buffer capacitor can greatly reduce the turned-off loss of IGCT. As a result, the switching loss of IGCT is approximately zero and IGCT-DCT can achieve greater capacity. However, when the power step is performed under SCM, a large bias current will be generated, which will affect the ZVS of IGCT, result in the direct discharge of lossless buffer capacitors through IGCT. Therefore, the transient control for SCM also needs to satisfy the ZVS condition. In order to solve the above problems, by analyzing the current characteristics of SCM, this paper proposes a transient control based on prediction, which can realize power step and power reversal without bias current and does not affect the ZVS of IGCT. Finally, a 1.5kV 3MW prototype is used to verify the effectiveness of the proposed theory. © The Institution of Engineering & technology 2024.

关键词： Capacitor bank

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Lightweight Intrusion Detection Using Reservoir Computing

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Computers, Materials & Continua 2024年第1期78卷 1345-1361页

作者： Jiarui Deng Wuqiang Shen Yihua Feng Guosheng Lu Guiquan Shen Lei Cui Shanxiang Lyu Joint Laboratory on Cyberspace Security China Southern Power GridGuangzhou510080China College of Cyber Security Jinan UniversityGuangzhou510632China Guangdong Power Grid Company Limited Guangzhou510663China School of Computer Science and Technology Guangdong University of TechnologyGuangzhou510006China China Southern Power Grid Extra High Voltage Transmission CompanyGuangzhouChina

The blockchain-empowered Internet of Vehicles(IoV)enables various services and achieves data security and privacy,significantly advancing modern vehicle ***,the increased frequency of data transmission and complex network connections among nodes also make them more susceptible to adversarial *** a result,an efficient intrusion detection system(IDS)becomes crucial for securing the IoV *** IDSs based on convolutional neural networks(CNN)often suffer from high training time and storage *** this paper,we propose a lightweight IDS solution to protect IoV against both intra-vehicle and external *** approach achieves superior performance,as demonstrated by key metrics such as accuracy and ***,our method achieves accuracy rates ranging from 99.08% to 100% on the Car-Hacking dataset,with a remarkably short training time.

关键词： Echo state network intrusion detection system Internet of Vehicles reservoir computing

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Energy Consumption Optimization Technique for Micro Base Stations in MIMO-OFDM System

Journal of Network Intelligence

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Journal of Network Intelligence 2024年第2期9卷 988-1002页

作者： Li, Jian-Po Pan, Xing-Han Yu, Ting-Wen Tian, Jin-Lei School of Computer Science Northeast Electric Power University Jilin132012 China Guangdong Provincial Key Laboratory of Digital Grid Technology Digital Grid Research Institute China Southern Power Grid Guangzhou510630 China

In order to solve high energy consumption caused by massive micro base stations deployed in multi-cells, a joint beamforming and power allocation optimization algorithm is proposed in Multiple-Input Multiple-Output orthogonal frequency-division multiplexing (MIMO-OFDM) system. By obtaining the optimal beamforming factor and introducing the target user distance control factor, every user get the best power allocation to improve the recognition degree of micro base stations to the target user, and reduce the energy consumption of micro base stations. Furthermore, suitable micro base stations grouping threshold for this paper is proposed, and system energy efficiency would be further improved through micro base stations grouping strategy optimized based on the Artificial fish swarm algorithm (AFSA). Joint optimization algorithm accurately give beam gain, reduce the influence of interfering users, and allocate more power to the target user by satisfying the multi-criteria beamforming. Specifically, compared with other beamformings, when the maximum transmitting power of micro base stations is 15 W, joint optimization algorithm improved system energy efficiency by 9.37% and 9.24%. Compared with other micro base stations grouping strategies, the AFSA optimization improved system energy efficiency by 17.2% and 31.35% with faster convergence performance. Result show that allocating more power to the target users through beamforming and rational micro base stations grouping strategy, which can reduce system energy consumption effectively and improve system energy efficiency. © 2024, J. Network Intell. All rights reserved.

关键词： Beamforming

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Bi-objective Optimization of Real-time AGC Dispatch in Performance-based Frequency Regulation Market

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CSEE Journal of power and Energy Systems 2024年第6期10卷 2360-2370页

作者： Xiaoshun Zhang Tian Tan Tao Yu Bo Yang Xiaoming Huang Foshan Graduate School of Innovation Northeastern UniversityFoshan 528311China Meizhou Power Supply Bureau Guangdong Power Grid Co.Ltd.Meizhou 514000China College of Electric Power South China University of TechnologyGuangzhou 510640China Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunming 650500China Southern Power Grid Digital Enterprise Technology(Guangdong)Co. Ltd.Guangzhou 510000China

This paper illustrates a new bi-objective optimization model of real-time automatic generation control dispatch in a performance-based frequency regulation *** attempts to simultaneously minimize the total power deviation and the regulation mileage payment via optimally distributing the realtime total generation command to different regulation *** handle this problem,an efficient non-dominated sorting genetic algorithm II is adopted to rapidly obtain a high-quality Pareto front for real-time AGC dispatch.A dynamic ideal point based decision making technique is designed to select the best compromise solution from the obtained Pareto front according to the minimization of the total regulation variation,which can effectively avoid an excessive regulation variation for each ***,two testing systems are used to verify the performance of the proposed technique.

关键词： AGC dispatch bi-objective optimization dynamic ideal point based decision making performance-based frequency regulation regulation mileage

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A Situational Awareness Method for Initial Insulation Fault of Distribution Network Based on Multi-Feature Index Comprehensive Evaluation

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Energy Engineering 2024年第8期121卷 2191-2211页

作者： Hao Bai Beiyuan Liu Hongwen Liu Jupeng Zeng Jian Ouyang Yipeng Liu Electric Power Research Institute China Southern Power GridGuangzhou510663China State Key Laboratory of Disaster Prevention and Reduction for Power Grid Changsha University of Science and TechnologyChangsha410114China Electric Power Research Institute of Yunnan Power Grid Co. Ltd.Kunming650032China Qujing Power Supply Bureau of Yunnan Power Grid Co. Ltd.Qujing655099China

Most ground faults in distribution network are caused by insulation deterioration of power *** is difficult to find the insulation deterioration of the distribution network in time,and the development trend of the initial insulation fault is unknown,which brings difficulties to the distribution *** order to solve the above problems,a situational awareness method of the initial insulation fault of the distribution network based on a multi-feature index comprehensive evaluation is ***,the insulation situation evaluation index is selected by analyzing the insulation fault mechanism of the distribution network,and the relational database of the distribution network is designed based on the data and numerical characteristics of the existing distribution management ***,considering all kinds of fault factors of the distribution network and the influence of the power supply region,the evaluation method of the initial insulation fault situation of the distribution network is proposed,and the development situation of the distribution network insulation fault is classified according to the evaluation ***,principal component analysis was used to reduce the dimension of the training samples and test samples of the distribution network data,and the support vector machine(SVM)was *** optimal parameter combination of the SVM model was found by the grid search method,and a multi-class SVM model based on 1-v-1 method was ***,the trained multi-class SVM was used to predict 6 kinds of situation level prediction *** results of simulation examples show that the average prediction accuracy of 6 situation levels is above 95%,and the perception accuracy of 4 situation levels is above 96%.In addition,the insulation maintenance decision scheme under different situation levels is able to be given when no fault occurs or the insulation fault is in the early stage,which can meet the needs of power distribution an

关键词： Distribution grid insulation degradation initial insulation fault multi-feature indices multi-class SVM situational level situational awareness

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A Critical Review of Active Distribution Network Reconfiguration:Concepts,Development,and Perspectives

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Energy Engineering 2024年第12期121卷 3487-3547页

作者： Bo Yang Rui Zhang Jie Zhang Xianlong Cheng Jiale Li Yimin Zhou Yuanweiji Hu Bin He Gongshuai Zhang Xiuping Du Si Ji Yiyan Sang Zhengxun Guo Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunming650500China China Southern Power Grid Honghe Power Supply Bureau Mengzi661100China Faculty of Science Kunming University of Science and TechnologyKunming650500China China Southern Power Grid Yuxi Power Supply Bureau Yuxi653100China Yunnan Electric Power Grid Co. Ltd.Kunming650000China College of Electrical Engineering Shanghai University of Electric PowerShanghai200090China College of Information Science and Engineering Northeastern UniversityShenyang110819China Foshan Graduate School of Innovation Northeastern UniversityFoshan528311China

In recent years,the large-scale grid connection of various distributed power sources has made the planning and operation of distribution grids increasingly ***,a large number of active distribution network reconfiguration techniques have emerged to reduce system losses,improve system safety,and enhance power quality via switching switches to change the system topology while ensuring the radial structure of the *** scholars have previously reviewed these methods,they all have obvious shortcomings,such as a lack of systematic integration of methods,vague classification,lack of constructive suggestions for future study,***,this paper attempts to provide a comprehensive and profound review of 52 methods and applications of active distribution network reconfiguration through systematic method classification and ***,these methods are classified into five categories,i.e.,traditional methods,mathematical methods,meta-heuristic algorithms,machine learning methods,and hybrid methods.A thorough comparison of the various methods is also scored in terms of their practicality,complexity,number of switching actions,performance improvement,advantages,and ***,four summaries and four future research prospects are *** summary,this paper aims to provide an up-to-date and well-rounded manual for subsequent researchers and scholars engaged in related fields.

关键词： Active distribution network reconfiguration meta-heuristic algorithm machine learning

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Transient Frequency-Voltage Support Strategy for VSC-MTDC Integrated Offshore Wind Farms Based on Perturbation Observer and Funnel Control

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IEEE Transactions on Sustainable Energy 2025年第3期16卷 1931-1943页

作者： Gao, Wen Xiahou, Kaishun Liu, Yang Li, Zhigang Wu, Q.H. Chang, Dongxu Zhu, Yihua South China University of Technology School of Electric Power Engineering Guangzhou510641 China Chinese University of Hong Kong-Shenzhen School of Science and Engineering Shenzhen518172 China Electric Power Research Institute of China Southern Power Grid Guangzhou China

To address the transient frequency and voltage stability challenges posed by low-inertia offshore wind farms (OWFs) connected through voltage source converter (VSC) based multi-terminal high voltage direct current (VSC-MTDC) system, a nonlinear perturbation observer and funnel controlbased transient frequency and voltage support (PFTFVS) control strategy is proposed for VSC-MTDC integrated OWFs system. This approach utilizes improved estimation ability of the observer and adaptive feature of the funnel controller to enhance transient support capability and disturbance rejection performance of the system. The strategy comprises three parts: 1) an adaptive transient frequency support and rotor speed control method for wind turbines is devised to enhance the frequency support capability of OWFs;2) considering the energy storage capability of DC capacitor in VSC-MTDC system, a transient frequency support controller is designed for VSC station to swiftly manage transient frequency variations;3) utilizing the rapid power regulation ability of VSC-MTDC, a transient voltage support controller is developed for VSC station to enhance voltage stability and boost the power transmission capacity. Finally, dynamic simulations of VSC-MTDC integrated OWFs system are built to verify the validity and robustness of the proposed strategy. © 2010-2012 IEEE.

关键词： Offshore wind farms

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Evaluation of lightning-induced overvoltage on a 10 kV distribution line based on electromagnetic return-stroke model using finite-difference time-domain

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High Voltage 2024年第2期9卷 356-366页

作者： Pan Duan Lianfang Zhang Xiaogang Huang Jian Sun Yue Qi Qing Yang School of Automation Chongqing University of Posts and TelecommunicationsChongqingChina Chongqing Power Co Tongnan BurChongqingChina China Southern Power Grid Science Research Institute GuangzhouChina State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqingChina

Accurate simulation of lightning-induced overvoltage for overhead distribution lines is helpful to prevent lightning trip *** electromagnetic return-stroke model was used to represent lightning and then a 3D finite-difference time-domain(FDTD)method was adopted to simulate the lightning-induced overvoltage on a distribution line without a field-line coupling *** lightning-induced overvoltage behave for different ground conductivity and varying distance between the distribution line and the lightning channel was *** results showed that the overvoltage waveforms at the centre point of the line corresponding to lightning strikes on the lossy ground and an ideal ground(σ=∞)were similar;however,the peak amplitudes of the waveform were affected by soil conductivity at a close *** relationship between magnitude of the overvoltage and distance can be described by a second-order exponential decay ***,the overvoltage calculated using the proposed model was compared with those obtained based on Agrawal's model and measurements made using the newly developed intelligent insulator on *** these comparisons,it could be concluded that the FDTD method with the electromagnetic return-stroke model produces reasonably accurate results of the attenuated oscillation waveform,which can better reproduce the overvoltage on operational distribution lines.

关键词： lightning distribution return

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