检索结果-南通市图书馆

Operational Practice and Prospects of china southern power grid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electricity 2006年第2期17卷 30-32页

作者： Wang Jiuling Wang Ben（译） Li Shulan（审校） china southern power grid Corp. Ltd. 不详

The Applied Research on Higher Voltage Class for china southern power grid completed at the end of 2004 pointed to a conclusion that transmission schemes using ±800-kV DC and 1000-kV AC are feasible to the southern grid. According to the grid’s 11th Five-Year Plan, the ultra-high voltage transmission will take its place in the power grid soon.

关键词：电网运行实践中国电力工业华南地区

Influences of ±800 kV Yunnan-Guangdong HVDC System on Security and Stability of china southern power grid

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Energy and power Engineering 2013年第4期5卷 1230-1234页

作者： Baorong Zhou Xiaoming Jin Chao Hong Pei Zhang Zhigang Wu Electric power Research Institute of china southern power grid Guangzhou China South china University of Technology Guangzhou China Tianjin University Tianjin China

The interaction mechanism between AC and DC systems in a hybrid AC-DC transmission grid is discussed with PSS/E software. Analysis shows that receiving-end AC faults may cause much more damage on the HVDC system operation than the sending-end AC faults in a multi-infeed HVDC system, and the damage severity depends on the power recovering rate of the HVDC systems. For HVDC systems with slow power recovering rate, the receiving-end AC faults may probably be a critical factor to constrain power transfer limits. Larger capacity of HVDC system means not only higher power transfer-limit of the parallel connected AC-DC transmission grid, but also more expensive stabilizing cost.

关键词： HVDC Security Stability AC/DC power System Interaction

Study on Capability of power Transmission from West to East in china southern power grid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electricity 2007年第1期18卷 43-48页

作者： Li Wei Tong Mingdong Zhang Lin Xu Dongjie Lin Feng Li Xin Zuo Zhengmin Ye Qing china power Engineering Consulting Group Corporation Central Southem china Electric power Design Institute Southwest Electric power Design Institute Guangdong Electric power Design Institute 不详

The uneven distribution of economic development and energy resources in the southern power grid, yet with stronger complementary superiority has determined the necessity to actively push forward power transmission from west to east in the southern power grid and realize optimal disposition in even greater scope. To further promote transmission capability and operational security from west to east, measures including power sources disposition, unit starting schemes, power grid configuration, DC modulation and application of new transmission technologies are analyzed in this paper.

关键词：中国南方电网西电东送输电能力输电技术

Date Conversion in BPA and PSS/E Based on china southern power grid

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Energy and power Engineering 2013年第4期5卷 1421-1424页

作者： Kezhen Liu Kezhen Liu Qinzhi Wang Hongchun Shu Hao Hu School of Electrical Engineering Kunming University of Science and Technology Kunming China

This paper undertakes transference of BPA date of the china southern power grid into PSS/E data, covering a comparison between DC data and calculated results of power flow which excluded DC data, testing the accuracy of transference of power flow data, and demonstrating the transference program in data conversion is applicative. The results show that the two results fundamentally resemble each other, which indicates the transferred data is correct.

关键词： Flow Calculation BPA PSS/E Date Conversion

Practice and Prospect of AC/DC Hybrid power grid in southern china

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electricity 2005年第A4期16卷 37-42页

作者： By Wang Jiuling china southern power grid Co., Ltd. china southern power grid Co. Ltd.

china southern power grid is a unique EHV AC/DC hybrid transmission network that operates in china. In its service area, the distribution of energy resources and the development of economy are extremely unbalanced, so long-distance and bulk power transmission are needed; besides, the geography and climate conditions are serious, rains, fogs, lightning and typhoon as well as high temperature are common all the year round. Facing these challenges, the power grid enhanced stability control, improved the equipment and strengthen the network structure. In the future, the power grid plans to optimize the disposition of power sources and build digitalized power system.

关键词： AC/DC hybrid power grid stability control

Key Factors for Efficient Consumption of Renewable Energy in a Provincial power grid in southern china

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of power and Energy Systems 2020年第3期6卷 554-562页

作者： Ming Wen Yong Li Xintao Xie Yijia Cao Yaowu Wu Weiyu Wang Li He Yu Cao Binkun Xu Limiao Huang Economic Research Institute Hunan Key Laboratory of Energy Internet Supply-demand and OperationState Grid Hunan Electric Power CompanyChangsha 410004China College of Electrical and Information Engineering Hunan UniversityChangsha 410082China State grid Hunan Electric power Company Changsha 410004China School of Electrical and Electronic Engineering HUSTWuhan 430074China

The development of renewable energy sources(RES)is important to promote the energy transition and address climate *** the centralized RES power plants in the north of china,the distributed RES power plants in the south of china for achieving local consumption have become an effective ***,the differences between RES and hydropower consumption have become obvious in some *** paper investigates the key factors affecting the abandonment of RES in the south of *** alleviate the problem of RES consumption,various measures are discussed from the aspects of evaluating the consumption capacity of power grids at different voltage levels,optimizing demand-side management,flexibly for reforming the peak-shaving power sources of thermal power plants and strengthening inter-provincial *** production simulation is used to validate the analysis and discussion.

关键词： Hydropower power consumption renewable energy wind power

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

Anomaly Detection of Controllable Electric Vehicles through Node Equation against Aggregation Attack

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 427-442页

作者： Jing Guo Ziying Wang Yajuan Guo Haitao Jiang State grid Jiangsu Electric power Co. Ltd.Research InstituteState Grid Corporation of ChinaNanjing211100China

The rapid proliferation of electric vehicle(EV)charging infrastructure introduces critical cybersecurity vulnerabilities to power grids *** study presents an innovative anomaly detection framework for EV charging stations,addressing the unique challenges posed by third-party aggregation *** approach integrates node equations-based on the parameter identification with a novel deep learning model,xDeepCIN,to detect abnormal data reporting indicative of aggregation *** employ a graph-theoretic approach to model EV charging networks and utilize Markov Chain Monte Carlo techniques for accurate parameter *** xDeepCIN model,incorporating a Compressed Interaction Network,has the ability to capture complex feature interactions in sparse,high-dimensional charging *** results on both proprietary and public datasets demonstrate significant improvements in anomaly detection performance,with F1-scores increasing by up to 32.3%for specific anomaly types compared to traditional methods,such as wide&deep and DeepFM(Factorization-Machine).Our framework exhibits robust scalability,effectively handling networks ranging from 8 to 85 charging ***,we achieve real-time monitoring capabilities,with parameter identification completing within seconds for networks up to 1000 *** research contributes to enhancing the security and reliability of renewable energy systems against evolving cyber threats,offering a comprehensive solution for safeguarding the rapidly expanding EV charging infrastructure.

关键词： Anomaly detection electric vehicle aggregation attack deep cross-network