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Investigating Load Regulation Characteristics of a Wind-PV-Coal Storage Multi-Power Generation System
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作者 Zhongping Liu Enhui Sun +3 位作者 Jiahao Shi Lei Zhang Qi Wang Jiali Dong 《Energy Engineering》 EI 2024年第4期913-932,共20页
There is a growing need to explore the potential of coal-fired power plants(CFPPs)to enhance the utilization rate of wind power(wind)and photovoltaic power(PV)in the green energy field.This study developed a load regu... There is a growing need to explore the potential of coal-fired power plants(CFPPs)to enhance the utilization rate of wind power(wind)and photovoltaic power(PV)in the green energy field.This study developed a load regulation model for a multi-power generation system comprising wind,PV,and coal energy storage using realworld data.The power supply process was divided into eight fundamental load regulation scenarios,elucidating the influence of each scenario on load regulation.Within the framework of the multi-power generation system with the wind(50 MW)and PV(50 MW)alongside a CFPP(330 MW),a lithium-iron phosphate energy storage system(LIPBESS)was integrated to improve the system’s load regulation flexibility.The energy storage operation strategy was formulated based on the charging and discharging priority of the LIPBESS for each basic scenario and the charging and discharging load calculation method of LIPBESS auxiliary regulation.Through optimization using the particle swarm algorithm,the optimal capacity of LIPBESS was determined to be within the 5.24-4.88 MWh range.From an economic perspective,the LIPBESS operating with CFPP as the regulating power source was 49.1% lower in capacity compared to the renewable energy-based storage mode. 展开更多
关键词 Wind power coal-fired power PV multi-power generation system lithium-iron phosphate energy storage system
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一种有效的Batch RSA算法的研究 被引量:2
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作者 李云飞 柳青 +1 位作者 李彤 郝林 《计算机科学》 CSCD 北大核心 2011年第6期127-132,139,共7页
提出了一种改进的Batch RSA算法来提升Batch RSA算法的解密性能。该改进算法结合了负载转移技术和Multi-Power RSA技术,在Batch RSA算法的指数计算阶段提升Batch RSA算法的解密性能。实验结果和理论分析表明,该改进算法使得Batch RSA算... 提出了一种改进的Batch RSA算法来提升Batch RSA算法的解密性能。该改进算法结合了负载转移技术和Multi-Power RSA技术,在Batch RSA算法的指数计算阶段提升Batch RSA算法的解密性能。实验结果和理论分析表明,该改进算法使得Batch RSA算法的解密性能得到显著提升,且易于并行实现,可使基于多核平台的BatchRSA算法的整体性能得到进一步提升。 展开更多
关键词 BATCH RSA multi-powER RSA 解密 加速 并行 多核
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Trans-regional transmission of large-scale hydropower: problems and solutions in receiving power grid 被引量:5
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作者 Jianyu Lu Jianjian Shen +1 位作者 Chengguo Su Qianqian Shen 《Global Energy Interconnection》 2019年第4期342-350,共9页
Large-capacity hydropower transmission from southwestern China to load centers via ultra-high voltage direct current(UHVDC) or ultra-high voltage alternating current(UHVAC) transmission lines is an important measure o... Large-capacity hydropower transmission from southwestern China to load centers via ultra-high voltage direct current(UHVDC) or ultra-high voltage alternating current(UHVAC) transmission lines is an important measure of the accommodation of large-scale hydropower in China. The East China Grid(ECG) is the main hydropower receiver of the west–east power transmission channel in China. Moreover, it has been subject to a rapidly increasing rate of hydropower integration over the past decade. Currently, large-scale outer hydropower is one of the primary ECG power sources. However, the integration of rapidly increasing outer hydropower into the power grid is subject to a series of severe drawbacks. Therefore, this study considered the load demands and hydropower transmission characteristics for the analysis of several major problems and the determination of appropriate solutions. The power supply-demand balance problem, hydropower transmission schedule problem, and peakshaving problem were considered in this study. Correspondingly, three solutions are suggested in this paper, which include coordination between the outer hydropower and local power sources, an inter-provincial power complementary operation, and the introduction of a market mechanism. The findings of this study can serve as a basis to ensure that the ECG effectively receives an increased amount of outer hydropower in the future. 展开更多
关键词 HYDROPOWER integration multi-energy COORDINATION multi-powER grid COORDINATION
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基于Multi-Power的批处理RSA算法的研究 被引量:2
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作者 李云飞 柳青 +1 位作者 李彤 郝林 《云南大学学报(自然科学版)》 CAS CSCD 北大核心 2011年第3期271-274,280,共5页
提出一种改进的Batch RSA算法来提升Batch RSA算法的解密性能.该改进算法结合了批处理技术和Multi-Power RSA技术,在Batch RSA算法的指数计算阶段来提升Batch RSA算法的解密性能.实验结果和理论分析表明该改进算法使得Batch RSA算法的... 提出一种改进的Batch RSA算法来提升Batch RSA算法的解密性能.该改进算法结合了批处理技术和Multi-Power RSA技术,在Batch RSA算法的指数计算阶段来提升Batch RSA算法的解密性能.实验结果和理论分析表明该改进算法使得Batch RSA算法的解密性能得到显著提升. 展开更多
关键词 BATCH RSA multi-powER RSA 解密 加速
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Multi-power multi-radio传感网中联合调度、信道和功率分配的最优路由策略
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作者 郭晓行 李金宝 《系统工程理论与实践》 EI CSSCI CSCD 北大核心 2011年第S2期114-118,共5页
研究了multi-power multi-radio无线传感器网络中联合调度、信道和功率分配的最优路由问题,并利用线性规划方程设计了该问题的最优路由方案,同时联合解决了链路调度、信道和功率分配问题.然后针对最优路由问题的NP复杂性,设计了有效的... 研究了multi-power multi-radio无线传感器网络中联合调度、信道和功率分配的最优路由问题,并利用线性规划方程设计了该问题的最优路由方案,同时联合解决了链路调度、信道和功率分配问题.然后针对最优路由问题的NP复杂性,设计了有效的多项式时间解决方案.实验结果表明,提出的联合优化的路由方案能有效地减小端到端的传输时延和能量消耗. 展开更多
关键词 无线传感器网络 multi-powER MULTI-RADIO 路由 调度 信道分配 功率分配
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Powertrain design and energy management of a novel coaxial series-parallel plug-in hybrid electric vehicle 被引量:7
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作者 ZHANG LiPeng QI BingNan +2 位作者 ZHANG RunSheng LIU JingChao WANG LiQiang 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2016年第4期618-630,共13页
For a series plug-in hybrid electric vehicle,higher working efficiency can be achieved by the drive system with two small motors in parallel than that with one big motor alone.However,the overly complex structure will... For a series plug-in hybrid electric vehicle,higher working efficiency can be achieved by the drive system with two small motors in parallel than that with one big motor alone.However,the overly complex structure will inevitably lead to a substantial increase in the development cost.To improve the system price-performance ratio,a new kind of series-parallel hybrid system evolved from the series plug-in hybrid system is designed.According to the technical parameters of the selected components,the system model is established,and the vehicle dynamic property and pure electric drive economy are evaluated.Based on the dynamic programming,the energy management strategy for the drive system under the city driving cycle is developed,and the superiority validation of the system is completed.For the studied vehicle driven by the designed series-parallel plug-in hybrid system,compared with the one driven by the described series plug-in hybrid system,the dynamic property is significantly improved because of the multi-power coupling,and the fuel consumption is reduced by 11.4%with 10 city driving cycles.In a word,with the flexible configuration of the designed hybrid system and the optimized control strategy of the energy management,the vehicle performance can be obviously improved. 展开更多
关键词 plug-in hybrid electric vehicle series-parallel hybrid system multi-power coupling dynamic programming energymanagement
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An Range-free Localization Scheme for Large Scale Underwater Wireless Sensor Networks 被引量:2
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作者 周异 顾宝军 +2 位作者 陈凯 陈剑波 管海兵 《Journal of Shanghai Jiaotong university(Science)》 EI 2009年第5期562-568,共7页
In this paper, we study an area localization problem in large scale underwater wireless sensor networks (UWSNs). The limited bandwidth, the severely impaired channel and the cost of underwater equipment all make the... In this paper, we study an area localization problem in large scale underwater wireless sensor networks (UWSNs). The limited bandwidth, the severely impaired channel and the cost of underwater equipment all make the underwater localization problem very challenging. Exact localization is very difficult for UWSNs in deep underwater environment. We propose a range free method based on mobile detachable elevator transceiver (DET) and 3D multi-power area localization scheme (3D-MALS) to address the challenging problem. In the proposed scheme, the ideas of 2D multi-power area localization scheme (2D-ALS) and utilizing DET are used to achieve the simplicity, location accuracy, scalability and low cost performances. The DET can rise and get down to broadcast its position. And it is assumed that all the underwater nodes underwater have pressure sensors and know their z coordinates. We evaluate the performances of 2D-ALS and our proposed 3D-MALS schemes under both ideal and non-ideal channel propagation conditions, in terms of localization error and localization ratio. The simulation results show that our proposed scheme is much more efficient than the 2D-ALS. 展开更多
关键词 underwater sensor networks LOCALIZATION multi-powER mobile beacons range free
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Model-Based Double Closed-Loop Coordinated Control Strategy for the Electro-Mechanical Transmission System of Heavy Power-Split HEVs 被引量:3
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作者 Weida Wang Yuhang Zhang +2 位作者 Xiaoxia Sun Changle Xiang Chao Yang 《Automotive Innovation》 CSCD 2021年第1期44-55,共12页
The dual-mode electro-mechanical transmission(EMT)system is a crucial part of power-split hybrid electric vehicles(HEVs),especially for the heavy HEVs.To improve the precision of the system power distribution and the ... The dual-mode electro-mechanical transmission(EMT)system is a crucial part of power-split hybrid electric vehicles(HEVs),especially for the heavy HEVs.To improve the precision of the system power distribution and the response speed of the electric power supply,a model-based double closed-loop coordinated control strategy is proposed.As the basis of the proposed control strategy,an EMT system model,particularly of an electrical system,is established first.The proposed control strategy includes the power distribution strategy,battery power closed-loop feedback control strategy,and motor coordinated control strategy.To verify the feasibility of the proposed control strategy,simulation and experiment are performed.The results indicate that the proposed control strategy can realize the expected power distribution by coordinating generators and motors and achieve rapid and stable electric power supply. 展开更多
关键词 Hybrid electric vehicles Electro-mechanical transmission system Hybrid power-split Power coordinated control multi-power distribution
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MESO-based Robustness Voltage Sliding Mode Control for AC Islanded Microgrid 被引量:1
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作者 Hao Pan Qingfang Teng Dangdang Wu 《Chinese Journal of Electrical Engineering》 CSCD 2020年第2期83-93,共11页
A new modified extended state observer(MESO)-based robustness voltage sliding mode control(SMC)strategy is proposed for an AC islanded microgrid under system uncertainties including system parameter and load variation... A new modified extended state observer(MESO)-based robustness voltage sliding mode control(SMC)strategy is proposed for an AC islanded microgrid under system uncertainties including system parameter and load variation.First,the disturbance effect on the system is regarded as a lumped uncertainty,and a state space model of the uncertain islanded microgrid system is established.Then,a modified extended state observer is designed to estimate external disturbances and internal perturbation.Finally,considering the lumped uncertainty,a sliding mode controller with a multi-power reaching law is proposed to enable the output voltage of the system to track its reference voltage rapidly and accurately,and to enhance the robustness of the system.The simulation results confirm that the proposed robustness voltage control strategy can perform satisfactory voltage control and demonstrate a strong capability to reject parameter and load variation. 展开更多
关键词 Islanded microgrid modified extended state observer multi-power reaching law system uncertainties robustness voltage sliding mode control
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Novel mixed-voltage I/O buffer with thin-oxide CMOS transistors
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作者 俞波 王源 +1 位作者 贾嵩 张钢刚 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2009年第7期83-85,共3页
This paper presents a novel mixed-voltage I/O buffer without an extra dual-oxide CMOS process.This mixed-voltage I/O buffer with a simplified circuit scheme can overcome the problems of leakage current and gateoxide r... This paper presents a novel mixed-voltage I/O buffer without an extra dual-oxide CMOS process.This mixed-voltage I/O buffer with a simplified circuit scheme can overcome the problems of leakage current and gateoxide reliability that the conventional CMOS I/O buffer has.The design is realized in a 0.13-μm CMOS process and the simulation results show a good performance increased by ~34% with respect to the product of power consumption and speed. 展开更多
关键词 mixed-voltage I/O buffer multi-power domain thin-oxide CMOS
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