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Middle Permian palaeobiogeography study in East Kunlun,A'nyêmaqên and Bayan Har

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Science China Earth Sciences 2004年第12期47卷 1120-1126页

作者： WANG yongbiao yang Hao Faculty of Earth Science China University of Geosciences Wuhan 430074 China Faculty of Earth Science China University of Geosciences Wuhan 430074 China

Three regions can easily be identified in the study area according to the Middle Permian palaeobiogeographic distribution of biota, they are the southern slope of East Kunlun, A’nyêmaqên and Bayan Har. Biotic constitution and ecology in the southern slope of East Kunlun and Bayan Har are very similar. Both the diversity and abundance of organisms in these two areas are very high and reefs are widely developed. However, biotic diversity and abundance in A’nyêmaqên which is between the above two areas are obviously low. Differentiation of palaeo- biogeographic distribution in these areas should be due to the baring of A’nyêmaqên ocean in the time of Middle Permian. Middle Permian radiolarian chert and thick abyssal red ooze are widely spread in A’nyêmaqên, implying that the A’nyêmaqên ocean had a great scale in size. Vast scale of deep ocean basin became an impassable gulf for some of the benthos, and as a result, only part of the organisms could have the chance to get to the isolated islands situated in ocean basin. Small living space and hard conditions in the islands further limited the abundance and diversity of biota. Tectonic background reflected by the geochemical study of basalt in the three areas is coupling well enough with the palaeobiogeographic division.

关键词： palaeobiogeography, Middle Permian, East Kunlun, A'nyêmaqên, Bayan Har.

Reliability Assessment for Integrated Power-gas Systems Considering Renewable Energy Uncertainty and Cascading Effects

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CSEE Journal of Power and Energy Systems 2023年第3期9卷 1214-1226页

作者： Yucui Wang yongbiao yang Qingshan Xu School of Cyber Science and Engineering Southeast UniversityNanjing 210096China School of Electrical Engineering Southeast UniversityNanjing 210096China and Nanjing Center for Applied MathematicsNanjing 210096China

Integrated power-gas systems(IPGSs)make the power system and natural gas system(NGS)as a whole,and strengthen interdependence between the two *** to bidirectional energy conversion in IPGS,a disturbance may turn into a catastrophic ***,increasing proportion of renewable energy brings challenges to reliability of ***,partial failure or degradation of system performance leads IPGS operate at multiple performance ***,this paper proposes a reliability assessment model of IPGSs which represents multiple performance of components and considers cascading effects,as well as renewable energy ***,a framework of IPGS reliability assessment is proposed:multistate models for main elements in the IPGS are *** a gas-power-generation calculation operator and a power-to-gas calculation operator are utilized to bi-directionally convert a multi-state model between NGS and power ***,nodal reliability indices for IPGS are given to display impacts of cascading effects and renewable energy uncertainty on reliabilities of *** results on IPGS test system demonstrate the proposed methods.

关键词： Cascading effects integrated power-gas systems multi-state model reliability renewable energy uncertainty

Community Integrated Energy System Trading:A Comprehensive Review

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Journal of Modern Power Systems and Clean Energy 2022年第6期10卷 1445-1458页

作者： Lu Chen Qingshan Xu yongbiao yang Hui Gao Weixiao Xiong College of Automation&College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China School of Electrical Engineering Southeast UniversityNanjing 210096China

Focused on life,consumption,and leisure,communities have been regarded as the basic unit of energy use in a city owing to rapid urbanization,whose energy use density continues to ***,community integrated energy systems(CIESs)in the rapid development stage have become embedded,small,and self-sufficient energy ecosystems within cities because of their environmental and economic *** face a competitive energy trading environment that comprises numerous entities and complicated *** paper presents an extensive review of various issues related to CIES ***,the concepts,types,and resources of CIESs are ***,the trading patterns and strategies of CIESs are reviewed from the four perspectives of the trading objects:community-to-peer(C2P),peer-to-peer(P2P),community-to-community(C2C),and community-to-grid(C2G).Third,a tri-layer trading framework and the features of CIESs that participate in combined multienergy markets are ***,the key issues in CIES trading are summarized.

关键词： Distributed generation community integrated energy system multi-energy market trading pattern

Evolution of microstructure and texture of AZ80 magnesium alloy under hot torsion with constant decreasing temperature rate

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Journal of Magnesium and Alloys 2024年第4期12卷 1619-1637页

作者： yongbiao yang Jinxuan Guo Cuiying Wang Wenxuan Jiang Zhimin Zhang Qiang Wang Xing Zhang College of Materials Science and Engineering North University of ChinaLane 3Xueyuan RoadTaiyuanShanxi 030051China North Hongyang mechanical and electronic limited company of Henan Province China

Hot torsion tests for AZ80 magnesium alloy were carried out in the temperature range of 380℃-260℃,with a constant decreasing temperature rate of 10℃/s in order to weaken the basal texture and refine the *** results indicated that the average grain sizes were refined forming gradient structure with increasing specimen radial position from center(12.2-5.4μm),and that the initial basal texture intensity of the extruded magnesium alloy was weakened from 46.2 to ***,the extension twins(ETs)could be disintegrated from the twins forming separated twins with smaller ***,ETs with the same twin variant intersecting with each other could be coalesced forming grains with similar orientation,while ETs with different twin variants were separated by twins boundaries contributing to grain ***,in addition to the conventional continuous dynamic recrystallized(CDRX)grains with 30˚orientation rotated around C-axis of the parent grains,CDRXed grains with 30˚rotation around a-axis and random rotation axis were also ***,the CDRX evolution induced twins were also elaborated,exhibiting the complex competition between CDRX and *** torsion deformation with constant decreasing temperatures rate is an effective way of grain refinement and texture modification.

关键词： Texture Microstructure Hot torsion Decreasing temperature AZ80

The effects of deformation parameters and cooling rates on the aging behavior of AZ80+0.4%Ce

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Journal of Magnesium and Alloys 2024年第2期12卷 639-658页

作者： yongbiao yang Jinxuan Guo Cuiying Wang Ting Yan Zhang Wenxuan Jiang Zhimin Zhang Qiang Wang Guojun Li Jun Wang College of Materials Science and Engineering North University of ChinaLane 3Xueyuan RoadTaiyuanShanxiChina030051 State Key Laboratory of Advanced Stainless Steel Materials Taiyuan Iron Steel(Group)Co.Ltd.Taiyuan 030003China Technology Center Shanxi Taigang Stainless Steel Co.Ltd.Taiyuan 030003China

The extruded AZ80+0.4%Ce magnesium alloy was twisted in the temperature range of 300-380℃by using a Gleeble 3500 thermal simulation test machine with a torsion *** deformed cylindrical specimens were cooled at a cooling rate of 10℃/s or 0.1℃/s,respectively,and aged at 170℃.The microstructure analysis results showed that the grain size decreased with increasing specimen radial position from center(SRPC),and that the strong initial basal texture of the extruded magnesium alloy was *** continuous and discontinuous dynamic recrystallization mechanisms were involved in contributing to the grain refinement for all specimens *** a novel extension twinning induced dynamic recrystallization mechanism was proposed for specimen deformed at 300℃.For the specimens deformed at 300℃and 340℃followed by a slow cooling rate(0.1℃/s),precipitates of various shapes(β-Mg_(17)Al_(12)),with the dominant precipitates being on the grains boundaries,appeared on the surface *** specimen deformed at 380℃,lamellar precipitates(LPS)in the interiors of the grains were *** aging,the LPS still dominated for specimens twisted at 380℃;however,the LPS gradually decreased with decreasing deformation temperatures from 380℃to 300℃.Dynamically precipitatedβ,especially those decorating the grain boundaries,changed the competition pictures for the LPS and precipitates of other shapes after ***,LPS dominated the areas for the center section of the specimens after aging regardless of deformation *** temperature deformation with high SRPC followed by rapid cooling rate increased the micro hardness of the alloy after aging due to refined grain,reduced precipitates size,decreased lamellar spacing as well as strain hardening.

关键词： AZ80+0.4%Ce magnesium alloy Hot torsion Deformation parameters Cooling rate Aging Micro hardness

Time series modeling and filtering method of electric power load stochastic noise

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Protection and Control of Modern Power Systems 2017年第1期2卷 269-275页

作者： Li Huang yongbiao yang Honglei Zhao Xudong Wang Hongjuan Zheng NARI Technology Development CO. LtdNanjingJiangsu Province 211106China. State Grid Tianjin Electric Power Company Tianjin 300010China.

Stochastic noises have a great adverse effect on the prediction accuracy of electric power *** online and filtering real-time can effectively improve measurement ***,pretreating and inspecting statistically the electric power load data is essential to characterize the stochastic noise of electric power ***,set order for the time series model by Akaike information criterion(AIC)rule and acquire model coefficients to establish ARMA(2,1)***,test the applicability of the established ***,Kalman filter is adopted to process the electric power load *** results of total variance demonstrate that stochastic noise is obviously decreased after Kalman filtering based on ARMA(2,1)***,variance is reduced by two orders,and every coefficient of stochastic noise is reduced by one *** filter method based on time series model does reduce stochastic noise of electric power load,and increase measurement accuracy.

关键词： Electric power load Stochastic noise ARMA model Kalman filter

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一种水轮发电机功角精确测量方法

电力系统自动化 2010年第15期34卷 96-99页

作者：杨永标侯明国周捷国电南瑞科技股份有限公司江苏省南京市210061

考虑到水轮发电机转速较慢、极数较多,实现功角精确测量较为困难,提出一种既满足特征大齿又满足均匀齿的测量方法。该方法充分利用齿与齿之间的机械加工误差,寻找出匹配的齿间距,同时采用频率跟踪方法解决了初相角校验时易受频率扰动影... 详细信息

考虑到水轮发电机转速较慢、极数较多,实现功角精确测量较为困难,提出一种既满足特征大齿又满足均匀齿的测量方法。该方法充分利用齿与齿之间的机械加工误差,寻找出匹配的齿间距,同时采用频率跟踪方法解决了初相角校验时易受频率扰动影响的问题,解决了各种类型齿下直接法测量功角的精度问题。介绍了该方法的总体思路和软件流程,给出了在浙江天荒坪抽水蓄能电站中的功角测量记录曲线,测量结果令人满意。

关键词：水轮发电机功角测量初相角校验齿间距匹配

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促进削峰填谷的居民实时积分套餐优化设计

电力自动化设备 2020年第7期40卷 134-140页

作者：陈璐徐青山杨永标杨斌东南大学电气工程学院江苏南京210096 国网江苏省电力有限公司江苏南京210028

在新一轮电力改革背景下,以积分为载体,提出了一种促进削峰填谷的居民实时积分套餐,初探电力销售端的居民侧市场化交易模式。首先,设计了促进削峰填谷的居民实时积分套餐机制,在用电低谷时段引入正积分鼓励居民多用电,在用电高峰时段利... 详细信息

在新一轮电力改革背景下,以积分为载体,提出了一种促进削峰填谷的居民实时积分套餐,初探电力销售端的居民侧市场化交易模式。首先,设计了促进削峰填谷的居民实时积分套餐机制,在用电低谷时段引入正积分鼓励居民多用电,在用电高峰时段利用负积分引导居民少用电,并基于消费者心理学,建立了基于实时积分套餐的居民负荷响应不确定性模型;然后,基于效用最大化原则,提出了兼顾电量峰谷差下降率和激励成本的居民实时积分套餐优化模型,并采用拉丁超立方采样方法和遗传算法相结合的方法进行求解;最后,设计了居民实时积分套餐实施架构及模式。算例结果表明,实时积分套餐能够很好地适应居民用电特点,激发居民群体的互动潜力,为居民参与电力市场交易提供支撑。

关键词：削峰填谷实时积分需求响应价格激励实施模式

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基于时变互补特性的聚合空调调控及恢复策略

电力系统自动化 2020年第13期44卷 39-47页

作者：陈璐杨永标徐青山东南大学电气工程学院江苏省南京市210096

因具有较好的空间热储能特性,聚合空调负荷调控已纳入常态化电力系统运行中,但调控策略很大程度上将破坏负荷群的多样性,带来聚合功率振荡、响应潜力不稳定、反弹负荷过大等问题。针对这些问题,文中重点分析了调温控制对单体、聚合空调... 详细信息

因具有较好的空间热储能特性,聚合空调负荷调控已纳入常态化电力系统运行中,但调控策略很大程度上将破坏负荷群的多样性,带来聚合功率振荡、响应潜力不稳定、反弹负荷过大等问题。针对这些问题,文中重点分析了调温控制对单体、聚合空调功率和响应潜力的影响,建立了基于调温控制的聚合空调功率时变特性模型及聚合方法。然后,基于分时段调控架构,构建了基于时变互补特性的聚合空调两阶段调控模型,并提出了相应的响应调控和负荷恢复策略,提升了空调群聚合质量。最后,基于15 000台空调仿真分析了外界温度、调温幅度等因素对聚合功率的影响,同时将分时段空调群调控策略应用于需求响应事件,结果表明了所提方法的有效性。

关键词：聚合空调调温控制需求响应负荷恢复