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计及参与成本贡献的用户侧云储能服务及其纳什议价模型

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电力自动化设备 2024年第2期44卷 9-17页

作者：谢涵铮刘友波马超殷科向月荆渝唐早刘俊勇四川大学电气工程学院四川成都610065 国网四川综合能源服务有限公司四川成都610031 杭州电子科技大学自动化学院浙江杭州310038

为了解决以共享经济概念为基础的云储能服务中用户与运营商之间的成本贡献及收益分配问题,提出了计及参与成本贡献的用户侧云储能服务及其纳什议价模型,对运营商独立投资的集中式云储能服务进行定价。在所述服务框架中,运营商优先对充... 详细信息

为了解决以共享经济概念为基础的云储能服务中用户与运营商之间的成本贡献及收益分配问题,提出了计及参与成本贡献的用户侧云储能服务及其纳什议价模型,对运营商独立投资的集中式云储能服务进行定价。在所述服务框架中,运营商优先对充放电需求互补的用户交换电能,再通过充放电或购售电来满足总体的净充放电需求;然后,采用Shapley值法为用户分配储能损耗贡献度,并综合考虑用户的新能源余量能量互济率及虚拟储能利用率,对分配结果改进,以进一步刻画用户服务费的差异性;最后,求解计及用户成本贡献的纳什议价模型,计算各用户的服务费。算例结果表明:所提方法减小了储能充放电损耗及总体用能成本,并提升了新能源消纳率;且改进Shapley值法的分配结果促进了用户将新能源余量上网及按需租赁虚拟储能。同时,纳什议价模型在保证用户服务费差异合理的前提下,兼顾了用户群体和运营商之间的利益诉求,促进了双方合作。

关键词：云储能成本贡献收益分配纳什议价改进Shapley值法

Fatty Acid Composition in Freeze-Dried Chinese Mitten Crabs (<i>Eriocheir sinensis</i>)

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Open Journal of Marine Science 2012年第3期2卷 90-95页

作者： Lihong He Feng Li junyong tang Department of Cell Biology Medical College Soochow University Suzhou China

Freeze drying is reported to be the best method of dehydration. Live fresh Chinese mitten crabs (Eriocheir sinensis) were freeze dried. The moisture content, rehydration ratio, and fatty acid composition of freeze-dried crabs were analysed. The applicability of using freeze drying to process high-value E. sinensis, so as to prolong the time duration of their storage and marketing, were discussed. After lyophilisation, the average moisture content was 6%. The physical properties (shape, size, and colour) of the musculature and viscera were maintained well during freeze drying. The rehydration ratio was 2.15 when rehydrated for 30 min at room temperature. The levels of polyunsaturated fatty acids, especially eicosapentaenoic acid and docosahexaenoic acid, were higher in female freeze-dried crabs than in male crabs. After full rehydration, the fatty acid composition of freeze-dried crabs showed no significant differences to that of frozen crabs after thawing. In conclusion, freeze drying can well preserve the physical properties of the edible parts and fatty acid composition of the viscera in high-value E. sinensis. Rehydration has no destruction of the nutritional value regarding to the fatty acid composition. Therefore, freeze drying is a suitable technique for the processing of high-value E. sinensis.

关键词： Eriocheir sinensis Fatty Acid Composition Freeze Drying Frozen Storage Rehydration Ratio Viscera

基于双向循环插补网络的分布式光伏集群时序数据耦合增强方法

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电网技术 2024年第7期48卷 2784-2794,I0042-I0048页

作者：廖若愚刘友波沈晓东高红均唐冬来刘俊勇四川大学电气工程学院四川省成都市610065 四川中电启明星信息技术有限公司四川省成都市610067

分布式光伏点多面广、局部渗透率高、安装环境复杂多变,真实可靠的量测数据是其性能分析、出力预测、运维调控的基础。然而,传感器故障和通信堵塞等因素会造成量测值缺失,恶化原始数据质量,进而影响配电网运行决策的准确性。传统数据修... 详细信息

分布式光伏点多面广、局部渗透率高、安装环境复杂多变,真实可靠的量测数据是其性能分析、出力预测、运维调控的基础。然而,传感器故障和通信堵塞等因素会造成量测值缺失,恶化原始数据质量,进而影响配电网运行决策的准确性。传统数据修复方法只考虑单一量测值的分布特征,忽略了多维时序数据的潜在耦合关系,修复精度有限。为此,该文提出一种基于双向多阶段循环插补网络和Seq2SeqAttention的时序数据耦合增强方法,改进了循环插补网络的结构,并引入衰减机制,能利用少量未缺失数据,潜在地挖掘原始数据的整体分布规律,一次性对多个光伏场站完成高质量数据修复。实验结果表明,所提方法在高比例缺失情况下仍有良好的修复性能,可明显增强分布式光伏集群的基础数据质量,提升电网运营商对光伏集群的细粒度感知能力。

关键词：缺失数据修复双向循环插补网络耦合时序数据分布式光伏集群

Multi-objective Dynamic Reconfiguration for Urban Distribution Network Considering Multi-level Switching Modes

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1241-1255页

作者： Hongjun Gao Wang Ma Yingmeng Xiang Zao tang Xiandong Xu Hongjin Pan Fan Zhang junyong Liu College of Electrical Engineering Sichuan UniversityChengdu 610065China Iowa State University Ameslowa50010USA Key Laboratory of Smart Gridof Ministry of Education Tianjin UniversityTianjin 300072China

The increasing integration of photovoltaic generators(PVGs) and the uneven economic development in different regions may cause the unbalanced spatial-temporal distribution of load demands in an urban distribution network(UDN). This may lead to undesired consequences, including PVG curtailment, load shedding, and equipment inefficiency, etc. Global dynamic reconfiguration provides a promising method to solve those challenges. However, the power flow transfer capabilities for different kinds of switches are diverse, and the willingness of distribution system operators(DSOs) to select them is also different. In this paper, we formulate a multi-objective dynamic reconfiguration optimization model suitable for multi-level switching modes to minimize the operation cost, load imbalance, and the PVG curtailment. The multi-level switching includes feeder-level switching, transformer-level switching, and substation-level switching. A novel load balancing index is devised to quantify the global load balancing degree at different levels. Then, a stochastic programming model based on selected scenarios is established to address the uncertainties of PVGs and loads. Afterward, the fuzzy c-means(FCMs) clustering is applied to divide the time periods of reconfiguration. Furthermore, the modified binary particle swarm optimization(BPSO)and Cplex solver are combined to solve the proposed mixed-integer second-order cone programming(MISOCP) model. Numerical results based on the 148-node and 297-node systems are obtained to validate the effectiveness of the proposed method.

关键词： Binary particle swarm optimization(BPSO) dynamic reconfiguration multi-level switching mixed-integer second-order cone programming(MISOCP) urban distribution network(UDN)

The onset of deep recycling of supracrustal materials at the Paleo-Mesoarchean boundary

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National Science Review 2022年第3期9卷 110-118页

作者： Xiaolei Wang Ming tang Jeff Moyen Di Wang Alfred Kr?ner Chris Hawkesworth Xiaoping Xia Hangqiang Xie Carl Anhaeusser Axel Hofmann junyong Li Linsen Li State Key Laboratory for Mineral Deposits Research School of Earth Sciences and Engineering Nanjing University School of Earth and Space Sciences Peking University Laboratoire Magmas et Volcans UMR6524 Université de LyonUJM-UCA-CNRS-IRD Institut für Geowissenschaften Universit?t Mainz Department of Earth Sciences University of Bristol State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences SHRIMP Center Institute of Geology Chinese Academy of Geological Sciences Economic Geology Research Unit University of the Witwatersrand Department of Geology University of Johannesburg

The recycling of supracrustal materials, and in particular hydrated rocks, has a profound impact on mantle composition and thus on the formation of continental crust, because water modifies the physical properties of lithological systems and the mechanisms of partial melting and fractional fractionation. On the modern Earth, plate tectonics offers an efficient mechanism for mass transport from the Earth’s surface to its interior, but how far this mechanism dates back in the Earth’s history is still uncertain. Here, we use zircon oxygen(O) isotopes to track recycling of supracrustal materials into the magma sources of early Archean igneous suites from the Kaapvaal Craton, southern Africa. The mean δ18O values of zircon from TTG(tonalite–trondhjemite–granodiorite) rocks abruptly increase at the Paleo-Mesoarchean boundary(ca.3230 million years ago; Ma), from mantle zircon values of 5‰–6‰ to approaching 7.1‰, and this increase occurs in ≤3230 Ma rocks with elevated Dy/Yb ratios. The18O enrichment is a unique signature of low-temperature water–rock interaction on the Earth’s surface. Because the later phase was emplaced into the same crustal level as the older one and TTG magmas would derive from melting processes in the garnet stability field(>40 km depth), we suggest that this evident shift in TTG zircon O isotopic compositions records the onset of recycling of the mafic oceanic crust that underwent seawater hydrothermal alteration at low temperature. The onset of the enhanced recycling of supracrustal materials may also have developed elsewhere in other Archean cratons and reflects a significant change in the tectonic realm during craton formation and stabilization, which may be important processes for the operation of plate tectonics on early Earth.

关键词： zircon oxygen isotopes TTG plate tectonics deep recycling Paleo-Mesoarchean boundary

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基于群感知技术的互动型智能台区研究与设计

四川电力技术 2024年第3期47卷 22-30页

作者：刘国伟陈宏辉陈童杨永庞凯唐志远刘俊勇广东电网有限责任公司茂名供电局广东茂名525000 四川大学电气工程学院四川成都610065

针对目前中国配电台区数据采集不全、信息化和智能化程度低、用户和电网之间缺乏交互等问题,考虑未来台区分布式可再生能源、储能系统、电动汽车等灵活性资源地广泛接入对电网的冲击,以适应未来配电网电力市场化改革需求为目标,开展基... 详细信息

针对目前中国配电台区数据采集不全、信息化和智能化程度低、用户和电网之间缺乏交互等问题,考虑未来台区分布式可再生能源、储能系统、电动汽车等灵活性资源地广泛接入对电网的冲击,以适应未来配电网电力市场化改革需求为目标,开展基于群感知技术的互动型智能台区研究与设计。首先,基于万物互联的思路构建智能台区电力物联网,实现台区负荷感知与数据监测,打通信息交互通道;然后,基于台区监测数据,设计一次能源自平衡和自趋优算法,实现台区的智能经济运行和智慧供电;最后,以信息物理系统为基础,对未来台区多能互补机制的建立进行了分析展望,力争将台区建成真正的智能体,为未来智能台区的建设发展提供可行的借鉴与参考。

关键词：群智感知智能台区智能体多能互补

Dynamic Reliability Assessment of Heavy Vehicle Crossing a Prototype Bridge Deck by Using Simulation Technology and Health Monitoring Data

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Journal of Architectural Environment & Structural Engineering Research 2022年第4期5卷 10-17页

作者： Yinghua Li junyong He Xiaoqing Zeng Yanxing tang Shixing County Administrative Service Center ShixingShaoguanGuangdong512500China Guangdong College of Industry and Commerce No.1O98Guangzhou North RoadTianheGuangzhouGuangdongChina Shixing County Statistics Bureau ShixingShaoguanGuangdong512500China Shixing County Hospital of Traditional Chinese Medicine ShixingShaoguanGuangdong512500China

Overloads of vehicle may cause damage to bridge structures,and how to assess the safety influence of heavy vehicles crossing the prototype bridge is one of the challenges.In this report,using a large amount of monitored data collected from the structural health monitoring system(SHMS)in service of the prototype bridge,of which the bridge type is large-span continuous rigid frame bridge,and adopting FEM simulation technique,we suggested a dynamic reliability assessment method in the report to assess the safety impact of heavy vehicles on the prototype bridge during operation.In the first place,by using the health monitored strain data,of which the selected monitored data time range is before the opening of traffic,the quasi dynamic reliability around the embedded sensor with no traffic load effects is obtained;then,with FEM technology,the FEM simulation model of one main span of the prototype bridge is built by using ANSYS software and then the dynamic reliability when the heavy vehicles crossing the prototype bridge corresponding to the middle-span web plate is comprehensively analyzed and discussed.At last,assuming that the main beam stress state change is in the stage of approximately linear elasticity under heavy vehicle loads impact,the authors got the impact level of heavy vehicles effects on the dynamic reliability of the prototype bridge.Based on a large number of field measured data,the dynamic reliability value calculated by our proposed methodology is more accurate.The method suggested in the paper can do good for not only the traffic management but also the damage analysis of bridges.

关键词： Large-span continuous rigid frame bridge Heavy vehicle Dynamic reliability evaluation SHM Finite element simulation technology

Fatigue Safety Assessment of Concrete Continuous Rigid Frame Bridge Based on Rain Flow Counting Method and Health Monitoring Data

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Journal of Architectural Environment & Structural Engineering Research 2023年第3期6卷 31-40页

作者： Yinghua Li junyong He Xiaoqing Zeng Yanxing tang Shixing County Administrative Service Center ShixingShaoguanGuangdong512500China Guangdong College of Industry and Commerce GuangzhouGuangdong510510China Shixing County Statistics Bureau ShixingShaoguanGuangdong512500China Shixing County Hospital of Traditional Chinese Medicine ShixingShaoguanGuangdong512500China

The fatigue of concrete structures will gradually appear after being subjected to alternating loads for a long time,and the accidents caused by fatigue failure of bridge structures also appear from time to time.Aiming at the problem of degradation of long-span continuous rigid frame bridges due to fatigue and environmental effects,this paper suggests a method to analyze the fatigue degradation mechanism of this type of bridge,which combines long-term in-site monitoring data collected by the health monitoring system(HMS)and fatigue theory.In the paper,the authors mainly carry out the research work in the following aspects:First of all,a long-span continuous rigid frame bridge installed with HMS is used as an example,and a large amount of health monitoring data have been acquired,which can provide efficient information for fatigue in terms of equivalent stress range and cumulative number of stress cycles;next,for calculating the cumulative fatigue damage of the bridge structure,fatigue stress spectrum got by rain flow counting method,S-N curves and damage criteria are used for fatigue damage analysis.Moreover,it was considered a linear accumulation damage through the Palmgren-Miner rule for the counting of stress cycles.The health monitoring data are adopted to obtain fatigue stress data and the rain flow counting method is used to count the amplitude varying fatigue stress.The proposed fatigue reliability approach in the paper can estimate the fatigue damage degree and its evolution law of bridge structures well,and also can help bridge engineers do the assessment of future service duration.

关键词： Long-span continuous rigid frame bridge Rain flow counting method Fatigue performance Health monitoring system Strain monitoring data

大电网广域安全稳定控制系统远传测试技术研究

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机械设计与制造工程 2024年第4期53卷 76-81页

作者：陈力王洪彬姚树友汤未王昕朱峻永颜云松李明应李超国网重庆市电力公司重庆400010 国电南瑞科技股份有限公司江苏南京211100

为应对电力系统数字化、复杂化导致的安全稳定控制系统可靠性降低的问题,研究了一种大电网广域安全稳定控制系统远传测试技术,通过对关键技术的研究应用,构建大电网广域安控系统远传测试系统,实现对安控系统的系统级功能逻辑及动作可靠... 详细信息

为应对电力系统数字化、复杂化导致的安全稳定控制系统可靠性降低的问题,研究了一种大电网广域安全稳定控制系统远传测试技术,通过对关键技术的研究应用,构建大电网广域安控系统远传测试系统,实现对安控系统的系统级功能逻辑及动作可靠性检测。最后基于该技术搭建测试系统并进行验证,结果表明:该测试系统能够方便快捷地实现异地安控系统联合测试,具有较高的应用价值。

关键词：安控系统电力系统系统仿真测试广域闭环测试远程测试

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