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

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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Application of intelligent Internet of Things technology in the security monitoring system of power Internet of Things network

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Discover Internet of Things 2025年第1期5卷 1-15页

作者： Song, Lei Lan, Haibo Du, Jin Wang, Kai Kang, Wei Automation Division of Electric Power Dispatching and Control Center State Grid Jibei Electric Power Company Limited Beijing100054 China Power Dispatching Control Center Dispatching Control Department State Grid Jibei Electric Power Company Limited Beijing100054 China State Grid Jibei Information & Telecommunication Company Beijing100054 China Dispatch and Control Center State Grid Jibei Electric Power Company Limited Beijing100054 China State Grid Jibei Electric Power Co. Beijing100054 China

The Internet of Things (IoT) refers to the latest iteration of the Internet, enabling communication and interaction among interconnected items. It is thriving and permeating every aspect of our life, including school, home, automobiles, and healthcare. IoT serves as a valuable aid in healthcare and plays a crucial role in a wide range of applications for monitoring medical services. Various wireless body area network devices and sensors offer real-time health monitoring services. The data produced by sensor-based devices requires secrecy, reliability, and end-to-end security in order to provide secure transmission across public networks. The implementation of IoT in healthcare will pose significant risks if patient information is not securely managed during transmission across unsecured networks or while stored by administrators. Recent research introduced an inflatable and anonymity-preserving user identification mechanism for IoT-based healthcare. Nonetheless, this technique was susceptible to certain attacks. These attacks compromise both the patients' medical data and their personal information. This study presents a security framework designed for real-time health monitoring systems with the objective of guaranteeing data secrecy, reliability, and security. This paper proposes AEAD (authentication, encryption and anomaly detection) approach for secure IoT healthcare monitoring. The authentication protocol is proposed based on the hash and XoR with biometric cryptographic operation. The medical data is encrypted using XoR based encoding scheme. Next an efficient machine learning based algorithm is used to detect the anomaly medical data. Different evaluation metrics (computational cost, encryption time, decryption time, and accuracy) are used to analyze the performance of the AEAD approach. The practical tests and analysis have demonstrated the practicality and efficacy of the monitoring system. The results indicate that it is capable of efficiently analyzing la

关键词： Authentication

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Flexible region aggregation of adjustable loads via an adaptive convex hull strategy

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Global Energy Interconnection 2025年第1期8卷 106-120页

作者： Yisha Lin Zongxiang Lu Ying Qiao Ruijie Chen State Key Lab of Power Systems Operation and Control (Department of Electrical Engineering Tsinghua University)BeijingPR China State Grid Quanzhou Electric Power Supply Company QuanzhouPR China

Increasing interest has been directed toward the potential of heterogeneous flexible loads to mitigate the challenges associated with the increasing variability and uncertainty of renewable *** the aggregated flexible region of load clusters managed by load aggregators is the crucial basis of power system scheduling for the system *** is because the aggregation result affects the qual-ity of the scheduling schemes.A stringent computation based on the Minkowski sum is NP-hard,whereas existing approximation meth-ods that use a special type of polytope exhibit limited adaptability when aggregating heterogeneous *** study proposes a stringent internal approximation method based on the convex hull of multiple layers of maximum volume boxes and embeds it into a day-ahead scheduling optimization *** numerical results indicate that the aggregation accuracy can be improved compared with methods based on one type of special polytope,including boxes,zonotopes,and ***,the reliability and economy of the power sys-tem scheduling can be enhanced.

关键词： Aggregation Flexible region Heterogeneous load power system scheduling

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Main Circuit's Parametric Optimal Design Counting Inconsistent Battery Parameters and control of 35 kV Large-Capacity Transformer-Less BESS

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IEEE Transactions on Energy Conversion 2025年第1期40卷 16-29页

作者： Liu, Chang Shi, Xianqiang Li, Rui Cai, Xu Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Department of Electrical Engineering School of Electronic Information and Electrical Engineering Shanghai200240 China

A large quantity of battery cells are required by each phase of the 35 kV large-capacity transformer-less battery energy storage system (LCTL-BESS) based on cascaded H-bridge converter (CHBC) and the parameters of battery cells are inconsistent. The inconsistencies of battery parameters should be fully considered in main circuit parameter design to improve the system's adaptability to them, thus delaying the aging rate of battery and ensuring the safety and high efficiency utilization during the whole life cycle of battery. The cascaded number of power modules in per phase is the most important main circuit parameter of system and has a significant influence on system performance, which should be optimized by considering system efficiency and safety comprehensively. Since the system efficiency and safety evaluation model are closely related to inconsistent battery parameters, it is impossible to establish them under different number of power modules based on the detailed parameters of each battery cell. Therefore, a method to establish system efficiency and safety evaluation model based on the capacity distribution of the battery cells is proposed. The massive battery cell parameter identifications and data processing are avoided. Our proposed method provides theoretical guidance for the optimization design of main circuit for LCTL-BESS. Additionally, the power and energy balancing control of 35 kV LCTL-BESS are investigated, and a novel energy balancing control strategy among modules considering the DC link voltage and state of charge (SOC) are proposed under the nearest level modulation (NLM), which can promise both the balancing effect and AC side output performance. Finally, the validity of the proposed parameter design method and the control strategy are proved through off-line simulation model. © 1986-2012 IEEE.

关键词： Battery management systems

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Analysis of Subsynchronous Oscillations Caused by Interactions of DFIG-Based Farms and SVGs

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IEEE Transactions on power Systems 2025年第2期40卷 1570-1582页

作者： Li, Kejiang Chen, Wuhui Qin, Wei Li, Canbing Qin, Wenping Qiu, Jing Guo, Xiaolong Chang, Xiqiang Liu, Defu College of Electrical and Power Engineering Taiyuan030024 China Shanghai Jiao Tong University School of Electronic Information and Electrical Engineering Shanghai200240 China The University of Sydney School of Electrical and Computer Engineering SydneyNSW2006 Australia State Grid Xinjiang Electrical Power Company Ltd. Xinjiang Control Center for Power Dispatching Wulumuqi830002 China

The static var generators (SVGs) installed at the point of common coupling (PCC) of wind farms can significantly impact the sub-synchronous oscillation (SSO) performance of the power system with grid-connected wind farms. For example, in 2017 multiple SSO events were caused by interactions among a doubly fed induction generator (DFIG) based farm, constant reactive power mode (CRPM) based SVGs, and the weak grid in Xinjiang, China. This paper reveals the mechanisms of the SSO caused by the interaction among DFIG-based farms, SVGs with different control modes, and weak grids. It is discovered that CRPM-based SVGs with low current controller bandwidths (CCBWs) can suppress SSOs in the power system with grid-connected DFIG-based farms, but that constant voltage mode (CVM) based SVGs and constant power factor mode (CPFM) based SVGs can worsen the SSO performance of the system. Furthermore, it is revealed why the amplitude of the super-synchronous component is larger than the sub-synchronous component in these events by deriving their amplitude ratio equation. Finally, the theoretical analysis results are verified by the small-signal method and electromagnetic transient (EMT) simulation. © 1969-2012 IEEE.

关键词： Phase locked loops

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Minimizing Average Job Completion Time for Multi-resource Queuing Computing Systems Using Drift-Plus-Penalty 3rd

Minimizing Average Job Completion Time for Multi-resource Q...

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3rd International Conference on Machine Learning, Cloud Computing and Intelligent Mining, MLCCIM 2024

作者： Chen, Chuanxu Li, Ruiting Guan, Quansheng Shi, Zhan Zeng, Ying Zheng, Jianping School of Electronic and Information Engineering South China University of Technology Guangzhou China Electric Power Dispatch and Control Center Guangdong Power Grid Co. Ltd. Guangzhou China

ISBN: (纸本)9789819616978

The Lyapunov drift-based scheduling algorithms control the queue length to stabilize the system and maximize the throughput for multi-resource multi-queue cloud/edge systems. However, these algorithms often ignore the heterogeneity in job length, thus leading to a long delay for job processing. To this end, this paper takes the job completion time (JCT) as a penalty in the drift-plus-penalty expression to minimize the average job competition time, and proposes a Lyapunov drift-plus-time (LDPT) based scheduling algorithm for multi-resource queuing computing systems. The optimality of LDPT with respect to average JCT and queue length is analyzed. By using the Amazon EC2 to simulate, the results show that LDPT can improve average JCT and average queuing time fairness. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Scheduling algorithms

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A Real-Time Anomaly Detection Method for Industrial control Systems Based on Long-Short Period Deterministic Finite Automaton

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IEEE Internet of Things Journal 2025年第10期12卷 14599-14621页

作者： Lin, Xaioli Yao, Yu Hu, Bo Yang, Wei Zhou, Xiaoming Li, Guangao Zhang, Wenjie Northeastern University Department of Computer Science and Engineering Hunnan Region Liaoning Shenyang110167 China State Grid Liaoning Electric Power Supply Co Ltd Dalian Power Supply Co Dalian234643 China Northeastern University Software Department Hunnan Region Liaoning Shenyang110169 China State Grid Liaoning Electric Power Supply Co Ltd Shenyang110002 China State Grid Liaoning Electric Power Supply Co Ltd Information and Communication Branch Shenyang110002 China

Anomaly detection has proven effective in detecting cyber-attacks in Industrial control Systems (ICS). However, most existing anomaly detection methods suffer from low accuracy because they ignore the effects of packet loss and network delay on time features, the sequential nature of transition time, masquerade transitions, and system recovery. Meanwhile, current Cyber-Physical Model (CPM) construction methods struggle to effectively address the state explosion problem and properly balance the removal and retention of low frequency states (LFS). In this paper, we propose a novel baseline model for ICS to detect anomalies through learning device-level polling time patterns and system-level CPM. The polling time pattern learning method reduces the effects of packet loss and network delay on time features by extracting only matching packets and replacing outliers. The CPM construction method mitigates state explosion through mixed-event discretisation, reduces the effects of network delay on transition/action times through outlier replacement, and captures the sequential nature of transition times with circular permutation sets. CPM model optimisation uses a post-pruning algorithm to balance the removal and retention of LFSs, and a CPM periodicity detection method that mitigates the effects of network delay to ensure that all industrial process periods are detected. A real-time anomaly detection method with a two-layer defence mechanism is proposed using the baseline model. Experimental results from two lab-scale ICSs with six process-related attacks confirm the effectiveness and superiority of the proposed method. It achieves average F1 scores of 98.81% and accuracy of 99.24%, outperforming the state-of-the-art work by 18.51% and 13.96% respectively. © 2025 IEEE.

关键词： SCADA systems

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Research on Energy Mutual Assistance control Strategy between Low-Voltage Stations Using Micro-Pumped Storage System with Common Reservoir Mode

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Energy engineering 2025年第3期122卷 1093-1112页

作者： Yunzhao Wu Guanglin Sha Qing Duan Xinwei Cong Lu Liu Ning Zhou Yingjie Zhou Power Distribution Department China Electric Power Research InstituteBeijing100192China Electric Power Research Institute State Grid Henan Electric Power Co.Ltd.Zhengzhou450052China School of Electrical and Control Engineering North China University of TechnologyShijingshan DistrictBeijing100144China

To enhance energy interaction among low-voltage stations(LVSs)and reduce the line loss of the distribution network,a novel operation mode of the micro-pumped storage system(mPSS)has been proposed based on the common ***,some operation modes of mPSS are analyzed,which include the separated reservoir mode(SRM)and common reservoir mode(CRM).Then,based on the SRM,and CRM,an energy mutual assistance control model between LVSs has been built to optimize energy ***,in the simulation,compared to the model without pumped storage in the LVS,the SRMand CLRMcan decrease the total energy loss by 294.377 and 432.578 kWh,*** configuration of mPSS can improve the utilization rate of the new energy source generation system,and relieve the pressure of transformer capacity in the *** with the SRM,the proposed CRM has reduced the total energy loss by 138.201 kWh,increased the new energy consumption by 161.642 kWh,and decreased the line loss by 7.271 *** the efficiency of the mPSS improving,the total energy loss reduction of CRM will be 3.5 times that of ***,the CRMcan significantly reduce the reservoir capacity construction of mPSS and ismore suitable for scenarios where the capacity configuration of mPSS is limited.

关键词： Micro pumped storage system common reservoir mode low-voltage substation area energy interaction operating mode

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Research on Energy Scheduling of Microgrid Considering Electric Vehicle Participation 11th

Research on Energy Scheduling of Microgrid Considering Elect...

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11th Frontier Academic Forum of Electrical engineering, FAFEE 2024

作者： Chang, Ling Cao, Guangshan Song, Yuanlin Tian, Zhili School of Information and Control Engineering Liaoning Petrochemical University Liaoning Fushun113000 China State Grid Fushun Power Supply Company Liaoning Fushun113000 China

ISBN: (纸本)9789819788279

Global energy and ecological environments are currently facing significant challenges, with the microgrid (MG) projects based on distributed energy generation gaining momentum, and electric vehicle (EV) being increasingly popular among the general public due to their green, energy-saving, and intelligent features. This research begins by introducing the current state of MG research and development both domestically and internationally, outlining the optimization strategy of MG energy management, and highlighting the integrated smart grid concept of "source-grid-load-storage-charging." The study then proceeds to summarize the research process of orderly charging and discharging of EVs, point out the current status of EV grid-connected technology, analyze optimization algorithms and scheduling strategies from the perspectives of economic benefits for both MG operators and EV users, and list and analyze domestic and international vehicle-to-grid (V2G) demonstration projects. Finally, in alignment with China's "dual-carbon" policy, recommendations are put forward for the integration of large-scale EVs into MG systems. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： State of charge

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Bilateral Primary Frequency Support and AC Voltage Regulation of LCC-HVDC Systems for Asynchronously Interconnected Systems

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IEEE Transactions on power Systems 2025年第3期40卷 2600-2612页

作者： Li, Zhixuan Xue, Ying Chen, Yiping Chen, Nan Yang, Conghuan Huang, Jiyu South China University of Technology School of Electric Power Engineering Guangzhou510641 China China Southern Power Grid Power Dispatching and Control Center Guangzhou510663 China University of Birmingham Department of Electronic Electrical and Systems Engineering School of Engineering BirminghamB15 2TT United Kingdom Guangzhou Maritime University Guangzhou510725 China

Modern power systems require significant grid flexibility. As the AC transmission lines are passive and cannot be controlled, grid flexibility in the transmission system can only be provided by actively controlling High-Voltage Direct Current (HVDC) systems, particularly the dominant LCC-HVDC systems. Although grid-flexibility support using LCC-HVDC has been studied, existing methods fail to achieve bidirectional frequency support while maintaining AC voltage. Therefore, a coordinated control method is proposed for the LCC-HVDC system to achieve bilateral frequency support (BFS) and AC voltage regulation (AVR) for asynchronously interconnected systems. The level of frequency support and the coupled dynamics of sending-end (SE) and receiving-end (RE) system frequencies are quantified by the developed low-order frequency response model, different from frequency models in previous research for only one end of the system. With the developed model, the control parameters of the proposed method are analytically calculated. This ensures an appropriate level of primary frequency support without jeopardizing the frequency response of the system at the remote end. The effectiveness of the proposed method is demonstrated through real-time simulation. © 1969-2012 IEEE.

关键词： HVDC power transmission

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