期刊文献+
共找到903篇文章
< 1 2 46 >
每页显示 20 50 100
Research on Scheduling Strategy of Flexible Interconnection Distribution Network Considering Distributed Photovoltaic and Hydrogen Energy Storage
1
作者 Yang Li Jianjun Zhao +2 位作者 Xiaolong Yang He Wang Yuyan Wang 《Energy Engineering》 EI 2024年第5期1263-1289,共27页
Distributed photovoltaic(PV)is one of the important power sources for building a new power system with new energy as the main body.The rapid development of distributed PV has brought new challenges to the operation of... Distributed photovoltaic(PV)is one of the important power sources for building a new power system with new energy as the main body.The rapid development of distributed PV has brought new challenges to the operation of distribution networks.In order to improve the absorption ability of large-scale distributed PV access to the distribution network,the AC/DC hybrid distribution network is constructed based on flexible interconnection technology,and a coordinated scheduling strategy model of hydrogen energy storage(HS)and distributed PV is established.Firstly,the mathematical model of distributed PV and HS system is established,and a comprehensive energy storage system combining seasonal hydrogen energy storage(SHS)and battery(BT)is proposed.Then,a flexible interconnected distribution network scheduling optimization model is established to minimize the total active power loss,voltage deviation and system operating cost.Finally,simulation analysis is carried out on the improved IEEE33 node,the NSGA-II algorithm is used to solve specific examples,and the optimal scheduling results of the comprehensive economy and power quality of the distribution network are obtained.Compared with the method that does not consider HS and flexible interconnection technology,the network loss and voltage deviation of this method are lower,and the total system cost can be reduced by 3.55%,which verifies the effectiveness of the proposed method. 展开更多
关键词 Seasonal hydrogen storage flexible interconnection AC/DC distribution network photovoltaic absorption scheduling strategy
下载PDF
Grid Side Distributed Energy Storage Cloud Group End Region Hierarchical Time-Sharing Configuration Algorithm Based onMulti-Scale and Multi Feature Convolution Neural Network
2
作者 Wen Long Bin Zhu +3 位作者 Huaizheng Li Yan Zhu Zhiqiang Chen Gang Cheng 《Energy Engineering》 EI 2023年第5期1253-1269,共17页
There is instability in the distributed energy storage cloud group end region on the power grid side.In order to avoid large-scale fluctuating charging and discharging in the power grid environment and make the capaci... There is instability in the distributed energy storage cloud group end region on the power grid side.In order to avoid large-scale fluctuating charging and discharging in the power grid environment and make the capacitor components showa continuous and stable charging and discharging state,a hierarchical time-sharing configuration algorithm of distributed energy storage cloud group end region on the power grid side based on multi-scale and multi feature convolution neural network is proposed.Firstly,a voltage stability analysis model based onmulti-scale and multi feature convolution neural network is constructed,and the multi-scale and multi feature convolution neural network is optimized based on Self-OrganizingMaps(SOM)algorithm to analyze the voltage stability of the cloud group end region of distributed energy storage on the grid side under the framework of credibility.According to the optimal scheduling objectives and network size,the distributed robust optimal configuration control model is solved under the framework of coordinated optimal scheduling at multiple time scales;Finally,the time series characteristics of regional power grid load and distributed generation are analyzed.According to the regional hierarchical time-sharing configuration model of“cloud”,“group”and“end”layer,the grid side distributed energy storage cloud group end regional hierarchical time-sharing configuration algorithm is realized.The experimental results show that after applying this algorithm,the best grid side distributed energy storage configuration scheme can be determined,and the stability of grid side distributed energy storage cloud group end region layered timesharing configuration can be improved. 展开更多
关键词 Multiscale and multi feature convolution neural network distributed energy storage at grid side cloud group end region layered time-sharing configuration algorithm
下载PDF
Coordinated planning for flexible interconnection and energy storage system in low-voltage distribution networks to improve the accommodation capacity of photovoltaic 被引量:2
3
作者 Jiaguo Li Lu Zhang +1 位作者 Bo Zhang Wei Tang 《Global Energy Interconnection》 EI CSCD 2023年第6期700-713,共14页
The increasing proportion of distributed photovoltaics(DPVs)and electric vehicle charging stations in low-voltage distribution networks(LVDNs)has resulted in challenges such as distribution transformer overloads and v... The increasing proportion of distributed photovoltaics(DPVs)and electric vehicle charging stations in low-voltage distribution networks(LVDNs)has resulted in challenges such as distribution transformer overloads and voltage violations.To address these problems,we propose a coordinated planning method for flexible interconnections and energy storage systems(ESSs)to improve the accommodation capacity of DPVs.First,the power-transfer characteristics of flexible interconnection and ESSs are analyzed.The equipment costs of the voltage source converters(VSCs)and ESSs are also analyzed comprehensively,considering the differences in installation and maintenance costs for different installation locations.Second,a bilevel programming model is established to minimize the annual comprehensive cost and yearly total PV curtailment capacity.Within this framework,the upper-level model optimizes the installation locations and capacities of the VSCs and ESSs,whereas the lower-level model optimizes the operating power of the VSCs and ESSs.The proposed model is solved using a non-dominated sorting genetic algorithm with an elite strategy(NSGA-II).The effectiveness of the proposed planning method is validated through an actual LVDN scenario,which demonstrates its advantages in enhancing PV accommodation capacity.In addition,the economic benefits of various planning schemes with different flexible interconnection topologies and different PV grid-connected forms are quantitatively analyzed,demonstrating the adaptability of the proposed coordinated planning method. 展开更多
关键词 Low-voltage distribution network Photovoltaic accommodation Flexible interconnection Energy storage system Bilevel programming
下载PDF
DESIGN OF EXACT REGENERATING HIERARCHICAL CODE FOR DISTRIBUTED STORAGE SYSTEM 被引量:1
4
作者 Hao Jie Lu Yanbo +1 位作者 Liu Xinji Xia Shutao 《Journal of Electronics(China)》 2013年第3期290-298,共9页
Erasure code is widely used as the redundancy scheme in distributed storage system. When a storage node fails, the repair process often requires to transfer a large amount of data. Regenerating code and hierarchical c... Erasure code is widely used as the redundancy scheme in distributed storage system. When a storage node fails, the repair process often requires to transfer a large amount of data. Regenerating code and hierarchical code are two classes of codes proposed to reduce the repair bandwidth cost. Regenerating codes reduce the amount of data transferred by each helping node, while hierarchical codes reduce the number of nodes participating in the repair process. In this paper, we propose a "sub-code nesting framework" to combine them together. The resulting regenerating hierarchical code has low repair degree as hierarchical code and lower repair cost than hierarchical code. Our code can achieve exact regeneration of the failed node, and has the additional property of low updating complexity. 展开更多
关键词 distributed storage network coding Regenerating code Hierarchical code Repair cost
下载PDF
Role of Energy Storage on Distribution Transformer Loading in Low Voltage Distribution Network
5
作者 Mohammad Taufiqul Arif Amanullah M. T. Oo A. B. M. Shawkat Ali 《Smart Grid and Renewable Energy》 2013年第2期236-251,共16页
Energy storage (ES) is a form of media that store one form of energy to be utilized at another time. Importance of ES is comprehended while intermittent nature of renewable energy (RE) generation increases and integra... Energy storage (ES) is a form of media that store one form of energy to be utilized at another time. Importance of ES is comprehended while intermittent nature of renewable energy (RE) generation increases and integration into the grid becomes viable in terms of economics and environment. However, technical analysis should be carried out before large scale integration into the grid. Some utilities experienced in Europe and expressed concern about issues in integrating large scale renewable energy in the areas of harmonics, voltage regulation, network protection and islanding. In Australia, distribution network (DN) is not robust compared to the European grid;moreover loads are largely distributed over large geographical areas. Installation of RE such as roof top solar photovoltaic (PV) is increasing in Australia which also boosted by the governments incentives to the individual owners. It is therefore obvious that large scale PV integration into the Australian grid is imminent. The intermittent characteristic of solar PV is expected to have greater impacts on DN in Australia compared to the DN in Europe. Therefore this paper investigated the impacts of solar PV on low voltage (LV) DN where loads connected through distribution transformer (DT) and finally further investigation was conducted with the deployment of ES into the respective load centers. It was found that storage reduced the overall peak load condition on the DT, and also reduced the energy fluctuation in the DN. It was also found that storage improved the voltage regulation on the LV side of DT and stabilized node voltage. 展开更多
关键词 Energy storage distributION network distributION TRANSFORMER IMPACTS SOLAR PV
下载PDF
Network security protection technology for a cloud energy storage network controller
6
作者 Tao Yan Jialiang Liu +3 位作者 Qianqian Niu Jizhong Chen Shaohua Xu Meng Niu 《Global Energy Interconnection》 2020年第1期86-98,共13页
As part of the ongoing information revolution,smart power grid technology has become a key focus area for research into power systems.Intelligent electrical appliances are now an important component of power systems,p... As part of the ongoing information revolution,smart power grid technology has become a key focus area for research into power systems.Intelligent electrical appliances are now an important component of power systems,providing a smart power grid with increased control,stability,and safety.Based on the secure communication requirements of cloud energy storage systems,this paper presents the design and development of a node controller for a cloud energy storage network.The function division and system deployment processes were carried out to ensure the security of the communication network used for the cloud energy storage system.Safety protection measures were proposed according to the demands of the communication network,allowing the system to run safely and stably.Finally,the effectiveness of the system was verified through a client-side distributed energy storage demonstration project in Suzhou,China.The system was observed to operate safely and stably,demonstrating good peak-clipping and valley filling effects,and improving the system load characteristics. 展开更多
关键词 CLOUD ENERGY storage system NODE CONTROLLER network security Smart grid distributed ENERGY storage
下载PDF
Data-driven Predictive Voltage Control for Distributed Energy Storage in Active Distribution Networks
7
作者 Yanda Huo Peng Li +5 位作者 Haoran Ji Hao Yu Jinli Zhao Wei Xi Jianzhong Wu Chengshan Wang 《CSEE Journal of Power and Energy Systems》 SCIE EI CSCD 2024年第5期1876-1886,共11页
Integration of distributed energy storage(DES)is beneficial for mitigating voltage fluctuations in highly distributed generator(DG)-penetrated active distribution networks(ADNs).Based on an accurate physical model of ... Integration of distributed energy storage(DES)is beneficial for mitigating voltage fluctuations in highly distributed generator(DG)-penetrated active distribution networks(ADNs).Based on an accurate physical model of ADN,conventional model-based methods can realize optimal control of DES.However,absence of network parameters and complex operational states of ADN poses challenges to model-based methods.This paper proposes a data-driven predictive voltage control method for DES.First,considering time-series constraints,a data-driven predictive control model is formulated for DES by using measurement data.Then,a data-driven coordination method is proposed for DES and DGs in each area.Through boundary information interaction,voltage mitigation effects can be improved by interarea coordination control.Finally,control performance is tested on a modified IEEE 33-node test case.Case studies demonstrate that by fully utilizing multi-source data,the proposed predictive control method can effectively regulate DES and DGs to mitigate voltage violations. 展开更多
关键词 distribution network distributed energy storage(DES) distributed generators(DGs) DATA-DRIVEN predictive voltage control
原文传递
Incremental cost analysis model of distribution network based on economic dispatch of distributed new-energy storage system
8
作者 Zhuan Zhou Jiayu Bian Zhiyong Yu 《Clean Energy》 EI CSCD 2024年第2期89-103,共15页
With the implementation of China’s carbon-peaking and carbon-neutrality strategy,new energy will achieve leapfrog growth.Due to the good economics of distributed new-energy generation,it can not only save users’own ... With the implementation of China’s carbon-peaking and carbon-neutrality strategy,new energy will achieve leapfrog growth.Due to the good economics of distributed new-energy generation,it can not only save users’own investment,but also help to achieve local consumption of new energy.However,it will also bring about a series of incremental costs to the power grid.This paper first enumerates the concept,development status and scheduling mode of a distributed new-energy storage system.Based on the above,it establishes a new-energy power generation model and an energy storage system charging and discharging model,and proposes a global optimization scheduling model for a distributed new-energy storage system,considering the time-of-use electricity price and taking the lowest total operating cost of the distributed new-energy power generation system as the objective function.Finally,it proposes a distribution network incremental cost analysis model based on the penetration of distributed new energy.The calculation results show that the incremental cost of grid-connected distributed new energy is 1.0849,1.2585 and 1.3473 yuan/kWh,respectively,which indicates that the global dispatching model can optimize the power consumption structure of a distributed power generation system,and has the function of peak shaving and valley filling,but the incremental cost of the distribution network will also increase. 展开更多
关键词 distributed new energy electrochemical energy storage economic dispatch distribution network cost time-sharing price
原文传递
Segment Storage System:基于P2P的网络存储服务(英文) 被引量:1
9
作者 赵靖 邓倩妮 《微电子学与计算机》 CSCD 北大核心 2006年第z1期122-124,共3页
Segment Storage System(S3)是一种基于P2P模型的网络存储服务,它具有高可用性、可靠性和持久性的特点。S3继承了P2P网络的优点并且摒弃了诸如文件时效性和不稳定性等缺点。S3的目标是提供一种高质量的网络存储服务。文章是对S3的设计... Segment Storage System(S3)是一种基于P2P模型的网络存储服务,它具有高可用性、可靠性和持久性的特点。S3继承了P2P网络的优点并且摒弃了诸如文件时效性和不稳定性等缺点。S3的目标是提供一种高质量的网络存储服务。文章是对S3的设计架构的一个概览。 展开更多
关键词 网络存储系统 对等网络 分布式哈希表
下载PDF
Storage capacity allocation strategy for distribution network with distributed photovoltaic generators 被引量:5
10
作者 Bin LI Xingchen LI +1 位作者 Xiaoqing BAI Zhineng LI 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2018年第6期1234-1243,共10页
Distributed photovoltaic generators(DPGs) have been integrated into the medium/low voltage distribution network widely. Due to the randomness and fluctuation of DPG, however, the distribution and direction of power fl... Distributed photovoltaic generators(DPGs) have been integrated into the medium/low voltage distribution network widely. Due to the randomness and fluctuation of DPG, however, the distribution and direction of power flow changed frequently some days. Therefore, more attention is needed to ensure the safe operation of the distribution network. The installation of energy storage systems(ESSs) can help the network withstand thefluctuations caused by DPG. Based on the discrete Fourier transform method, this paper presents an ESS capacity allocation strategy for the medium/low voltage distribution network with DPG. The reliability scenario models are created via Latin hypercube sampling with Cholesky decomposition and scenario reduction. Numerical results show that the proposed strategy can reduce the power flow fluctuation with less ESS capacity, and increase the penetration capacity of DPG in the distribution network while maintaining the quality of the power supply. 展开更多
关键词 Discrete FOURIER TRANSFORM distributed PHOTOVOLTAIC Energy storage system Medium/low voltage distribution network
原文传递
Optimal Dispatch for Battery Energy Storage Station in Distribution Network Considering Voltage Distribution Improvement and Peak Load Shifting 被引量:16
11
作者 Xiangjun Li Rui Ma +1 位作者 Wei Gan Shijie Yan 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2022年第1期131-139,共9页
Distribution networks are commonly used to demonstrate low-voltage problems.A new method to improve voltage quality is using battery energy storage stations(BESSs),which has a four-quadrant regulating capacity.In this... Distribution networks are commonly used to demonstrate low-voltage problems.A new method to improve voltage quality is using battery energy storage stations(BESSs),which has a four-quadrant regulating capacity.In this paper,an optimal dispatching model of a distributed BESS considering peak load shifting is proposed to improve the voltage distribution in a distribution network.The objective function is to minimize the power exchange cost between the distribution network and the transmission network and the penalty cost of the voltage deviation.In the process,various constraints are considered,including the node power balance,single/two-way power flow,peak load shifting,line capacity,voltage deviation,photovoltaic station operation,main transformer capacity,and power factor of the distribution network.The big M method is used to linearize the nonlinear variables in the objective function and constraints,and the model is transformed into a mixed-integer linear programming problem,which significantly improves the model accuracy.Simulations are performed using the modified IEEE 33-node system.A typical time period is selected to analyze the node voltage variation,and the results show that the maximum voltage deviation can be reduced from 14.06%to 4.54%.The maximum peak-valley difference of the system can be reduced from 8.83 to 4.23 MW,and the voltage qualification rate can be significantly improved.Moreover,the validity of the proposed model is verified through simulations. 展开更多
关键词 Energy storage station distribution network voltage regulation peak load shifting mixed integer programming
原文传递
Economics of energy storage technology in active distribution networks 被引量:9
12
作者 Jiongcong CHEN Xudong SONG 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2015年第4期583-588,共6页
An economic and environmental evaluation of active distribution networks containing lithium ion batteries(Li-ion),sodium sulfur batteries(NaS)and vanadium redox flow batteries(VRB)was carried out using the EnergyPLAN ... An economic and environmental evaluation of active distribution networks containing lithium ion batteries(Li-ion),sodium sulfur batteries(NaS)and vanadium redox flow batteries(VRB)was carried out using the EnergyPLAN software.The prioritization schemes of the combination of energy storage systems and intermittent energy systems were studied technically and economically based on some specific situations of the grid integrated with wind power.The results suggest that the technical and economic optimal intermittent energy-storage capacity ratio was 2:1 in predetermined energy system scenarios.Liion batteries storage system performed the best in critical excess electricity production(CEEP)absorption,energy saving and emission reduction while NaS batteries storage system was the most competitive among the three due to its cheaper costs. 展开更多
关键词 Active distribution networks Intermittent power sources Battery energy storage ECONOMY OPTIMIZATION
原文传递
A Virtual Energy Storage System for Voltage Control of Distribution Networks 被引量:3
13
作者 Saif Sabah Sami Student member +2 位作者 Meng Cheng Jianzhong Wu Nick Jenkins 《CSEE Journal of Power and Energy Systems》 SCIE 2018年第2期146-154,共9页
Increasing amounts of distributed generation(DG)connected to distribution networks may lead to the violation of voltage and thermal limits.This paper proposes a virtual energy storage system(VESS)to provide voltage co... Increasing amounts of distributed generation(DG)connected to distribution networks may lead to the violation of voltage and thermal limits.This paper proposes a virtual energy storage system(VESS)to provide voltage control in distribution networks in order to accommodate more DG.A VESS control scheme coordinating the demand response and the energy storage system was developed.The demand response control measures the voltage of the connected bus and changes the power consumption of the demand to eliminate voltage violations.The response of energy storage systems was used to compensate for the uncertainty of demand response.The voltage control of the energy storage system is a droop control with droop gain values determined by applying voltage sensitivity factors.The control strategy of the VESS was applied to a medium-voltage network and the results show that the control of the VESS not only facilitates the accommodation of higher DG capacity in the distribution network without voltage violations or network reinforcements but also prolongs the lifetime of the transformer’s on-load tap changer. 展开更多
关键词 Demand response distributed generation distribution network energy storage system voltage control virtual energy storage system
原文传递
Two-step Optimal Allocation of Stationary and Mobile Energy Storage Systems in Resilient Distribution Networks 被引量:3
14
作者 Xinyi Jiang Jian Chen +3 位作者 Qiuwei Wu Wen Zhang Yicheng Zhang Jie Liu 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2021年第4期788-799,共12页
Energy storage systems (ESSs) are acknowledged to be a promising option to cope with issues in high penetration of renewable energy and guarantee a highly reliable power supply. In this paper, a two-step optimal alloc... Energy storage systems (ESSs) are acknowledged to be a promising option to cope with issues in high penetration of renewable energy and guarantee a highly reliable power supply. In this paper, a two-step optimal allocation model is proposed to obtain the optimal allocation (location and size) of stationary ESSs (SESSs) and mobile ESSs (MESSs) in the resilient distribution networks (DNs). In the first step, a mixed-integer linear programming (MILP) problem is formulated to obtain the preselected location of ESSs with consideration of different scenarios under normal operation conditions. In the second step, a two-stage robust optimization model is established to get the optimal allocation results of ESSs under failure operation conditions which are solved by column-and-constraint generation (C&CG) algorithm. A hybrid ESS allocation strategy based on the subjective and objective weight analysis is proposed to give the final allocation scheme of SESSs and MESSs. Finally, the proposed two-step optimal allocation model is demonstrated on a modified IEEE 33-bus system to show its effectiveness and merits. 展开更多
关键词 Resilient distribution network stationary energy storage system mobile energy storage system optimal allocation
原文传递
Massive Files Prefetching Model Based on LSTM Neural Network with Cache Transaction Strategy 被引量:2
15
作者 Dongjie Zhu Haiwen Du +6 位作者 Yundong Sun Xiaofang Li Rongning Qu Hao Hu Shuangshuang Dong Helen Min Zhou Ning Cao 《Computers, Materials & Continua》 SCIE EI 2020年第5期979-993,共15页
In distributed storage systems,file access efficiency has an important impact on the real-time nature of information forensics.As a popular approach to improve file accessing efficiency,prefetching model can fetches d... In distributed storage systems,file access efficiency has an important impact on the real-time nature of information forensics.As a popular approach to improve file accessing efficiency,prefetching model can fetches data before it is needed according to the file access pattern,which can reduce the I/O waiting time and increase the system concurrency.However,prefetching model needs to mine the degree of association between files to ensure the accuracy of prefetching.In the massive small file situation,the sheer volume of files poses a challenge to the efficiency and accuracy of relevance mining.In this paper,we propose a massive files prefetching model based on LSTM neural network with cache transaction strategy to improve file access efficiency.Firstly,we propose a file clustering algorithm based on temporal locality and spatial locality to reduce the computational complexity.Secondly,we propose a definition of cache transaction according to files occurrence in cache instead of time-offset distance based methods to extract file block feature accurately.Lastly,we innovatively propose a file access prediction algorithm based on LSTM neural network which predict the file that have high possibility to be accessed.Experiments show that compared with the traditional LRU and the plain grouping methods,the proposed model notably increase the cache hit rate and effectively reduces the I/O wait time. 展开更多
关键词 Massive files prefetching model cache transaction distributed storage systems LSTM neural network
下载PDF
Security Analysis on a Remote Data Auditing Scheme for Distributed Storage Systems 被引量:1
16
作者 LIU Guangjun ZHANG Lining LI Xiangjun 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2020年第6期527-530,共4页
Remote data auditing becomes critical to ensure the storage reliability in distributed cloud storage.Recently,Le et al proposed an efficient private data auditing scheme NC-Audit designed for regenerating codes,which ... Remote data auditing becomes critical to ensure the storage reliability in distributed cloud storage.Recently,Le et al proposed an efficient private data auditing scheme NC-Audit designed for regenerating codes,which claimed that NC-Audit can effectively realize privacy-preserving data auditing for distributed storage systems.However,our analysis shows that NC-Audit is not secure for that the adversarial cloud can forge some illegal blocks to cheat the auditor successfully with a high probability even without storing the user’s whole data,when the coding field is large enough. 展开更多
关键词 data auditing regeneration code network coding distributed storage cloud computing
原文传递
Battery Storage Configuration of AC/DC Hybrid Distribution Networks 被引量:1
17
作者 He Meng Hongjie Jia +2 位作者 Tao Xu Wei Wei Xiaoyu Wang 《CSEE Journal of Power and Energy Systems》 SCIE EI CSCD 2023年第3期859-872,共14页
The upscaling requirements of energy transition highlight the urgent need for ramping up renewables and boosting system efficiencies.However,the stochastic nature of excessive renewable energy resources has challenged... The upscaling requirements of energy transition highlight the urgent need for ramping up renewables and boosting system efficiencies.However,the stochastic nature of excessive renewable energy resources has challenged stable and efficient operation of the power system.Battery energy storage systems(BESSs)have been identified as critical to mitigate random fluctuations,unnecessary green energy curtailment and load shedding with rapid response and flexible connection.On the other hand,an AC/DC hybrid distribution system can offer merged benefits in both AC and DC subsystems without additional losses during AC/DC power conversion.Therefore,configuring BESSs on an AC/DC distribution system is wellpositioned to meet challenges brought by carbon reductions in an efficient way.A bi-level optimization model of BESS capacity allocation for AC/DC hybrid distribution systems,considering the flexibility of voltage source converters(VSCs)and power conversion systems(PCSs),has been established in this paper to address the techno-economic issues that hindered wide implementation.The large-scale nonlinear programming problem has been solved utilizing a genetic algorithm combined with second-order cone programming.Rationality and effectiveness of the model have been verified by setting different scenarios through case studies.Simulation results have demonstrated the coordinated operation of BESS and AC/DC hybrid systems can effectively suppress voltage fluctuations and improve the cost-benefit of BESSs from a life cycle angle. 展开更多
关键词 AC/DC hybrid distribution network arbitrage revenue battery energy storage system life cycle cost voltage source converter
原文传递
A Holistic State Estimation Framework for Active Distribution Network with Battery Energy Storage System 被引量:1
18
作者 Shaojian Song Huangjiao Wei +2 位作者 Yuzhang Lin Cheng Wang Antonio Gómez-Expósito 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2022年第3期627-636,共10页
Battery energy storage systems(BESSs)are expected to play a crucial role in the operation and control of active distribution networks(ADNs).In this paper,a holistic state estimation framework is developed for ADNs wit... Battery energy storage systems(BESSs)are expected to play a crucial role in the operation and control of active distribution networks(ADNs).In this paper,a holistic state estimation framework is developed for ADNs with BESSs integrated.A dynamic equivalent model of BESS is developed,and the state transition and measurement equations are derived.Based on the equivalence between the correction stage of the iterated extended Kalman filter(IEKF)and the weighted least squares(WLS)regression,a holistic state estimation framework is proposed to capture the static state variables of ADNs and the dynamic state variables of BESSs,especially the state of charge(SOC).A bad data processing method is also presented.The simulation results show that the proposed holistic state estimation framework improves the accuracy of state estimation as well as the capability of bad data detection for both ADNs and BESSs,providing comprehensive situational awareness for the whole system. 展开更多
关键词 Active distribution network(ADN) anomaly detection battery energy storage system(BESS) Kalman filtering situational awareness state estimation state of charge(SOC)
原文传递
A Secured Message Transmission Protocol for Vehicular Ad Hoc Networks
19
作者 A.F.M.Suaib Akhter A.F.M.Shahen Shah +3 位作者 Mohiuddin Ahmed Nour Moustafa UnalÇavu¸soglu Ahmet Zengin 《Computers, Materials & Continua》 SCIE EI 2021年第7期229-246,共18页
Vehicular Ad hoc Networks(VANETs)become a very crucial addition in the Intelligent Transportation System(ITS).It is challenging for a VANET system to provide security services and parallelly maintain high throughput b... Vehicular Ad hoc Networks(VANETs)become a very crucial addition in the Intelligent Transportation System(ITS).It is challenging for a VANET system to provide security services and parallelly maintain high throughput by utilizing limited resources.To overcome these challenges,we propose a blockchain-based Secured Cluster-based MAC(SCB-MAC)protocol.The nearby vehicles heading towards the same direction will form a cluster and each of the clusters has its blockchain to store and distribute the safety messages.The message which contains emergency information and requires Strict Delay Requirement(SDR)for transmission are called safety messages(SM).Cluster Members(CMs)sign SMs with their private keys while sending them to the blockchain to confirm authentication,integrity,and confidentiality of the message.A Certificate Authority(CA)is responsible for physical verification,key generation,and privacy preservation of the vehicles.We implemented a test scenario as proof of concept and tested the safety message transmission(SMT)protocol in a real-world platform.Computational and storage overhead analysis shows that the proposed protocol for SMT implements security,authentication,integrity,robustness,non-repudiation,etc.while maintaining the SDR.Messages that are less important compared to the SMs are called non-safety messages(NSM)and vehicles use RTS/CTS mechanism for NSM transmission.Numerical studies show that the proposed NSM transmission method maintains 6 times more throughput,2 times less delay and 125%less Packet Dropping Rate(PDR)than traditional MAC protocols.These results prove that the proposed protocol outperforms the traditional MAC protocols. 展开更多
关键词 Ad hoc networks data security digital signatures distributed storage intelligent vehicles vehicular ad hoc networks wireless communication
下载PDF
计及故障维修与网络重构的灾后配电网综合调度策略 被引量:6
20
作者 汪涛 武传涛 +5 位作者 随权 陈岑 马云聪 林湘宁 李正天 魏繁荣 《中国电机工程学报》 EI CSCD 北大核心 2024年第5期1764-1776,I0008,共14页
当前,灾后配电网负荷恢复与故障维修多是独立考虑,缺乏有效联动,且没有合理计及包含故障维修时间及新能源出力的不确定性在内的双重因素影响。为此,提出一种灾后配电网维修恢复联合调度策略。首先,提出灾后配电网两阶段求解框架,第一阶... 当前,灾后配电网负荷恢复与故障维修多是独立考虑,缺乏有效联动,且没有合理计及包含故障维修时间及新能源出力的不确定性在内的双重因素影响。为此,提出一种灾后配电网维修恢复联合调度策略。首先,提出灾后配电网两阶段求解框架,第一阶段求解故障维修计划及网络重构问题,第二阶段解决移动式储能系统参与下的灾后配电网源荷协同调度问题。其次,构建移动式储能系统与维修人员的调度模型,量化分析移动式储能系统时空转移模型及能量模型,同时基于维修人员的时空转移特性,建立故障维修及网络重构模型。在此基础上,以恢复运行成本最小化为目标,分别采用离散鲁棒与连续鲁棒处理故障维修时间与新能源出力的不确定性,构建灾后配电网综合调度模型。最后,采用改进IEEE 33节点配电网进行仿真测试。结果表明,所提调度策略能够显著降低负荷失电率,减少停电损失。此外,两阶段算法在显著提升求解速度的同时能够保证求解精度,具有可行性和合理性。 展开更多
关键词 配电网 故障维修 网络重构 移动式储能系统 两阶段求解 鲁棒优化
下载PDF
上一页 1 2 46 下一页 到第
使用帮助 返回顶部