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IoT Empowered Early Warning of Transmission Line Galloping Based on Integrated Optical Fiber Sensing and Weather Forecast Time Series Data

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Computers, Materials & Continua 2025年第1期82卷 1171-1192页

作者： Zhe Li Yun Liang Jinyu Wang Yang Gao state grid Henan Electric Power company Electric Power Scientific Research Institute State Grid Henan Electric Power CompanyZhengzhou450052China

Iced transmission line galloping poses a significant threat to the safety and reliability of power systems,leading directly to line tripping,disconnections,and power *** early warning methods of iced transmission line galloping suffer from issues such as reliance on a single data source,neglect of irregular time series,and lack of attention-based closed-loop feedback,resulting in high rates of missed and false *** address these challenges,we propose an Internet of Things(IoT)empowered early warning method of transmission line galloping that integrates time series data from optical fiber sensing and weather ***,the method applies a primary adaptive weighted fusion to the IoT empowered optical fiber real-time sensing data and weather forecast data,followed by a secondary fusion based on a Back Propagation(BP)neural network,and uses the K-medoids algorithm for clustering the fused ***,an adaptive irregular time series perception adjustment module is introduced into the traditional Gated Recurrent Unit(GRU)network,and closed-loop feedback based on attentionmechanism is employed to update network parameters through gradient feedback of the loss function,enabling closed-loop training and time series data prediction of the GRU network ***,considering various types of prediction data and the duration of icing,an iced transmission line galloping risk coefficient is established,and warnings are categorized based on this ***,using an IoT-driven realistic dataset of iced transmission line galloping,the effectiveness of the proposed method is validated through multi-dimensional simulation scenarios.

关键词： Optical fiber sensing multi-source data fusion early warning of galloping time series data IoT adaptive weighted learning irregular time series perception closed-loop attention mechanism

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Value Assessment Method for the grid-Alternative Energy Storage Based on Coordinated Planning Framework

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Energy Engineering 2025年第2期122卷 621-649页

作者： Bingqing Wu Yunli Yue Yi Zhou Hengyu Zhou Haowen Guan Zhenjiang Shi Zili Chen Zhaoyuan Wu state grid Jibei Electric Power company Limited Economic Research Institute State Grid Jibei Electric Power Company LimitedBeijing100038China School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing102206China

As the development of new power systems accelerates and the impacts of high renewable energy integration and extreme weather intensify,grid-alternative energy storage is garnering increasing attention for its grid-interaction benefits and clear business ***,assessing the value of grid-alternative energy storage in the systemtransition has become critically *** the performance characteristics of storage,we propose a value assessment frame-work for grid-alternative energy storage,quantifying its non-wires-alternative effects from both cost and benefit *** on this,we developed a collaborative planning model for energy storage and transmission grids,aimed at maximizing the economic benefits of storage systems while balancing investment and operational *** model considers regional grid interconnections and their interactions with system *** participating in system operations,grid-alternative energy storage not only maximizes its own economic benefits but also generates social welfare transfer ***,based on multi-regional interconnected planning,grid-alternative energy storage can reduce system costs by approximately 35%,with the most significant changes observed in generation ***-regional coordinated planning significantly enhances the sys-tem’s flexibility in ***,when the load factor of interconnection lines between regions remains constant,system operational flexibility tends to decrease,leading to a roughly 28.9%increase in storage ***,under regional coordinated planning,the greater the disparity in wind power integration across interconnected regions,the more noticeable the reduction in system costs.

关键词： Coordinated planning grid-alternative energy storage non-wires alternative effects value assessment

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Coordinated Control Strategy of New Energy Power Generation System with Hybrid Energy Storage Unit

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Energy Engineering 2025年第1期122卷 167-184页

作者： Yun Zhang Zifen Han Biao Tian Ning Chen Yi Fan School of Mechano-Electronic Engineering Xidian UniversityXi’an710071China Electric Power Control Center State Grid Gansu Electric Power CompanyLanzhou730030China Electric Power Control Center State Grid Gansu Electric Power Company Zhangye Power Supply BranchZhangye734000China

The new energy power generation is becoming increasingly important in the power *** as photovoltaic power generation has become a research hotspot,however,due to the characteristics of light radiation changes,photovoltaic power generation is unstable and random,resulting in a low utilization rate and directly affecting the stability of the power *** solve this problem,this paper proposes a coordinated control strategy for a newenergy power generation system with a hybrid energy storage unit based on the lithium iron phosphate-supercapacitor hybrid energy storage ***,the variational mode decomposition algorithm is used to separate the high and low frequencies of the power signal,which is conducive to the rapid and accurate suppression of the power fluctuation of the energy storage ***,the fuzzy control algorithm is introduced to balance the power between energy *** this paper,the actual data is used for simulation,and the simulation results show that the strategy realizes the effective suppression of the bus voltage fluctuation and the accurate control of the internal state of the energy storage unit,effectively avoiding problems such as overshoot and over-discharge,and can significantly improve the stability of the photovoltaic power generation systemand the stability of the Direct Current *** is of great significance to promote the development of collaborative control technology for photovoltaic hybrid energy storage units.

关键词： Photovoltaic power suppression hybrid energy storage unit variationalmodal decomposition fuzzy control power distribution control

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Dispatchable Capability of Aggregated Electric Vehicle Charging in Distribution Systems

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Energy Engineering 2025年第1期122卷 129-152页

作者： Shiqian Wang Bo Liu Yuanpeng Hua Qiuyan Li Binhua Tang Jianshu Zhou Yue Xiang Economic and Technology Research Institute State Grid Henan Electric Power CompanyZhengzhou450052China College of Electrical Engineering Sichuan UniversityChengdu610065China

This paper introduces a method for modeling the entire aggregated electric vehicle(EV)charging process and analyzing its dispatchable *** methodology involves developing a model for aggregated EV charging at the charging station level,estimating its physical dispatchable capability,determining its economic dispatchable capability under economic incentives,modeling its participation in the grid,and investigating the effects of different scenarios and EV penetration on the aggregated load dispatch and dispatchable *** results indicate that using economic dispatchable capability reduces charging prices by 9.7%compared to physical dispatchable capability and 9.3%compared to disorderly ***,the peak-to-valley difference is reduced by 64.6%when applying economic dispatchable capability with 20%EV penetration and residential base load,compared to disorderly charging.

关键词： Aggregated charging dispatchable capability peak shaving and valley filling the economics of charging demand response

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A Verifiable Trust-Based CP-ABE Access Control Scheme for Cloud-Assisted Renewable Energy Systems

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Computers, Materials & Continua 2025年第1期82卷 1211-1232页

作者： Jiyu Zhang Kehe Wu Ruomeng Yan Zheng Tian Yizhen Sun Yuxi Wu Yaogong Guo Department of Control and Computer Engineering North China Electric Power UniversityBeijing102206China state grid Information&Communication company of Hunan Electric Power Corporation Changsha410118China state grid Hunan Electric Power Corporation Chenzhou Power Supply Branch Chenzhou423000China

Renewable Energy Systems(RES)provide a sustainable solution to climate warming and environmental pollution by enhancing stability and reliability through status acquisition and analysis on cloud platforms and intelligent processing on edge servers(ES).However,securely distributing encrypted data stored in the cloud to terminals that meet decryption requirements has become a prominent research ***,managing attributes,including addition,deletion,and modification,is a crucial issue in the access control scheme for *** address these security concerns,a trust-based ciphertext-policy attribute-based encryption(CP-ABE)device access control scheme is proposed for RES(TB-CP-ABE).This scheme effectivelymanages the distribution and control of encrypted data on the cloud through robust attribute key *** introducing trust management mechanisms and outsourced decryption technology,the ES system can effectively assess and manage the trust worthiness of terminal devices,ensuring that only trusted devices can participate in data exchange and access sensitive ***,the ES system dynamically evaluates trust scores to set decryption trust thresholds,thereby regulating device data access permissions and enhancing the system’s *** validate the security of the proposed TB-CP-ABE against chosen plaintext attacks,a comprehensive formal security analysis is conducted using the widely accepted random oraclemodel under the decisional q-Bilinear Diffie-Hellman Exponent(q-BDHE)***,comparative analysis with other schemes demonstrates that the TB-CP-ABE scheme cuts energy/communication costs by 43%,and scaleswell with rising terminals,maintaining average latency below 50ms,ensuring real-time service *** proposed scheme not only provides newinsights for the secure management of RES but also lays a foundation for future secure energy solutions.

关键词： Access control renewable energy systems(RES) ciphertext-policy attribute-based encryption(CP-ABE) security

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Short-term Power Load Forecasting Enhanced by Signal Decomposition-based Autoformer

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Journal of Systems Science and Information 2025年

作者： Yang YANG Xiyuan HU Maochun WANG School of Economics and Management University of Chinese Academy of Sciences School of Computer Science Beijing University of Technology state grid Qinghai Electric Power company

High-precision short-term load forecasting is of paramount importance for the safety, stability, and economic efficiency of po wer sy stem op erations. Du e to th e in herent ch aracteristics of electricity load data, including significant v olatility, a nd n onlinearity, h igh-precision s hort-term electricity load forecasting is facing formidable challenges. To enhance the accuracy of short-term load forecasting,this paper proposes a short-term electric load forecasting model based on Autoformer. The model aims to fully leverage sequential information within electric load time series to improve prediction ***, t his p aper fi rst em ploys En semble Em pirical Mo de De composition(E EMD) to decompose the electric load time series into sub-components at different f requencies, e nhancing t he predictability of the sub-components. Each sub-component is then individually processed by an Autoformer-based forecasting model, which consists of an encoder and a decoder, to generate component-level predictions. Finally, the predictions for all components are aggregated to obtain the final f orecasted *** v alidation o f t he p roposed m ethod h as b een c onducted o n a p ublicly a vailable electric load dataset, and the experimental results indicate that the proposed approach exhibits competitive predictive performance in short-term electrical load forecasting tasks.

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Blockchain-Enabled Robust-Game Electricity Transaction Model for a Multi-Microgrid System Considering Wind Power Uncertainty

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CSEE Journal of Power and Energy Systems 2025年第1期11卷 255-268页

作者： Jiayu Wu Yang Liu Qiming Yang Wenfeng Li College of Electrical Engineering Sichuan UniversityChengdu610065China state grid Corporation of China Henan Electric Power company Zhengzhou 450000China

Considering the uncertainty of wind power generation(WPG)and the specific operation behaviors of trading microgrids,this paper presents a blockchain-enabled robust-game electricity transaction model in a multi-microgrid system(MMS)to obtain optimal bidding-dispatching strategies,and achieve a transparent and decentralized electricity *** blockchain technology and a non-cooperative game model,the established MMS electricity transaction architecture provides a complete information game environment for all game microgrids and facilitates the transparent,efficient,orderly,spontaneous management of MMS electricity transactions without the intervention of a third trusted *** on the distributed transaction architecture,an MMS robust-game model is presented to achieve the optimal day-ahead bidding-dispatching(DA-BD)strategies,in which the individual microgrid two-stage adjustable robust-game bidding-dispatching(ARG-BD)model characterizes the WPG uncertainty by employing uncertain interval and adjustable robust *** binary expansion method,duality theory,big M method,and column-and-constrain generation algorithm(C&CG)are employed to solve the individual microgrid two-stage ARG-BD *** alternating robust-game procedure integrating the C&CG algorithm and non-cooperative game model is developed to solve the MMS robust-game *** studies demonstrate the transparent and decentralized transaction,economic mutual benefits,and solution robustness of the presented method.

关键词： Alternating robust-game procedure biddingdispatching model blockchain technology individual microgrid robust-game MMS robust-game model WPG uncertainty

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Microstructure and magnetic properties of FeCoZr(Mo)BGe nanocrystalline alloys

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Chinese Physics B 2025年第1期34卷 407-412页

作者： Wanqiu Yu Yanxiang Sun Lihua Liu Pingli Zhang College of Physics Jilin Normal UniversitySiping 136000China Chengxi Power Supply company State Grid Tianjin Electric Power CompanyTianjin 300190China

The microstructure and magnetic properties of Fe40Co40Zr9B10Ge1(Mo-free)and Fe_(40)Co_(40)Zr_(5)Mo_(4)B_(10)Ge1(Mocontaining)nanocrystalline alloys,prepared using an amorphous crystallization method,were *** addition affects the crystallization of the Fe_(40)Co_(40)Zr_(9)B_(10)Ge1amorphous alloy and decreases the grain size of theα-Fe(Co)phase below 650°*** the Mo-free alloy annealed at 600°C and the Mo-containing alloy annealed at 575°C,with a singleα-Fe(Co)crystallization phase and approximately similar crystallization volume fractions,the Mo-containing alloy showed smaller,more regularly shaped grains and a significantly narrower grain-size distribution than the Mo-free *** Fe and Co contents in the nanograins of the two alloys also *** the Mo-free alloy,a higher concentration of Co distributed in the residual amorphous *** the Mo-containing alloy,a higher concentration Co dissolved in the *** specific saturation magnetization and coercivity of the Mo-free alloy were 1.05-and 1.59-times higher than those of the Mo-containing alloy,respectively.

关键词： nanostructured materials Mo addition microstructure grain size

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A coordinated planning strategy of energy storage allocation and line upgrading to increase photovoltaic consumption with lowest planning cost

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Science China(Technological Sciences) 2025年第2期68卷 278-289页

作者： Bo ZHANG Yuqi JI Lu ZHANG Wei TANG Xiaohui ZHANG Liang WANG Haoran DING Hanchen MAO College of Information and Electrical Engineering China Agricultural UniversityBeijing 100084China state grid HeiLongJiang Electric Power Research Institute State Grid HeiLongJiang Electric Power Company LimitedHarbin 150030China School of Electrical and Information Engineering Zhengzhou University of Light IndustryZhengzhou 450000China

Random integration of massive distributed photovoltaic(PV)generation poses serious challenges to distribution *** violations,line overloads,increased peak-valley differences,and power-flow reversals can occur at different locations,times,and *** planning methods such as energy storage(ES)allocation and upgrading of lines may result in poor economics and low equipment *** study proposes a distribution-network planning strategy that coordinates three planning mechanisms:ES allocation to substations and to feeders,and line *** proposed strategy achieved the lowest annual cost,considering the distribution network problems at different locations,times,and severities.A net load curve description method was first proposed considering economic planning and the uncertain distribution of loads and ***,a multistage optimization model for ES allocation and line upgrading was established based on the net load ***,an improved IEEE33 node system was used in the case *** planning results show that the proposed coordinated planning strategy can address the problems caused by the random integration of massive distributed PVs,improve equipment utilization,and obtain the lowest total annual planning cost.

关键词： distribution network high proportion of PVs energy-storage allocation line upgrading uncertainty

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Intermetallic compounds for nitrogen electrochemistry

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Green Energy & Environment 2025年第2期10卷 268-291页

作者： Haohong Wei Cheng Tang Yanyun Wang Yongcheng Feng Huancong Shi Mingjin Cui Huakun Liu Shixue Dou Laiquan Li Institute of Energy Materials Science School of Energy and Power EngineeringUniversity of Shanghai Science and TechnologyShanghai200093China Tsinghua Center for Green Chemical Engineering Electrification(CCEE) Department of Chemical EngineeringTsinghua UniversityBeijing100084China state grid New Energy Cloud Carbon Neutralization Innovation Center State Grid Zhejiang Electric Power Co.LtdHuzhou Power Supply CompanyZhejiang313000China Shanghai Marine Diesel Engine Research Institute.Shanghai 201108China

Electrochemical nitrogen transformation techniques represent a burgeoning avenue for nitrogen pollutant remediation and synthesizing valuable nitrogenous products from atmospheric *** compounds(IMCs)nanocrystals,featured with unique geometric,electronic and functional properties,have emerged as promising *** review discusses various synthesis approaches for IMCs,including thermal annealing,wet chemical synthesis,electrochemical synthesis,and other emerging methods,analyzing their advantages and *** we summarized the recent advances of IMCs in electrocatalytic nitrogen transformation reactions,such as nitrate reduction reaction,nitric oxide reduction reaction,nitrogen reduction reaction,and hydrazine oxidation *** significant progress,challenges remain in the field,particularly in adopting more refined strategies to improve catalyst performance and *** review aims to comprehensively understand the structural properties of IMCs and their structure-performance relationship,guiding the development of more efficient and stable catalysts for future nitrogen electrochemistry.

关键词： Intermetallic compounds Electrocatalysis Nitrogen transformation reactions Synthesis methods Catalyst design

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