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Integrated strategy for real-time wind power fluctuation mitigation and energy storage system control

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Global Energy Interconnection 2024年第1期7卷 71-81页

作者： Yu Zhang Yongkang Zhang Tiezhou Wu Hubei University of Technology Hubei Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation ControlHubeiWuhan 430068P.R.China

To address the impact of wind-power fluctuations on the stability of power systems,we propose a comprehensive approach that integrates multiple strategies and methods to enhance the efficiency and reliability of a system.First,we employ a strategy that restricts long-and short-term power output deviations to smoothen wind power fluctuations in real time.Second,we adopt the sliding window instantaneous complete ensemble empirical mode decomposition with adaptive noise(SW-ICEEMDAN)strategy to achieve real-time decomposition of the energy storage power,facilitating internal power distribution within the hybrid energy storage system.Finally,we introduce a rule-based multi-fuzzy control strategy for the secondary adjustment of the initial power allocation commands for different energy storage components.Through simulation validation,we demonstrate that the proposed comprehensive control strategy can smoothen wind power fluctuations in real time and decompose energy storage power.Compared with traditional empirical mode decomposition(EMD),ensemble empirical mode decomposition(EEMD),and complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN)decomposition strategies,the configuration of the energy storage system under the SW-ICEEMDAN control strategy is more optimal.Additionally,the state-of-charge of energy storage components fluctuates within a reasonable range,enhancing the stability of the power system and ensuring the secure operation of the energy storage system.

关键词： SW-ICEEMDAN HESS Real-time smoothing Rule-based multi-fuzzy control SoC

^(137)Cs tracing of the spatial patterns in soil redistribution,organic carbon and total nitrogen in the southeastern Tibetan Plateau

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International Soil and Water Conservation Research 2023年第1期11卷 86-96页

作者： Zhengan Su Lijuan Wang Yihan Liu Bin Fu Jjianhui Zhang Zuo Wu Tao Zhou Junjie Wang Key Laboratory of Mountain Environment Evolution and Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu610041PR China University of Chinese Academy of Science Beijing100049PR China College of Geography and Resources Science Sichuan Normal UniversityChengdu610101PR China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYa'an625014.PR China

The southeastern Tibetan Plateau,which profoundly affects East Asia by helping to maintain the stability of climate systems,biological diversity and clean water,is one of the regions most vulnerable to water erosion,wind erosion,tillage erosion,freeze-thaw erosion and overgrazing under global climate changes and intensive human activities.Spatial variations in soil erosion in terraced farmland(TL),sloping farmland(SL)and grassland(GL)were determined by the^(137)Cs tracing method and compared with spatial variations in soil organic carbon(SoC)and total nitrogen(total N).The^(137)Cs concentration in the GL was higher in the 0-0.03 m soil layer than in the other soil layers due to weak migration and diffusion under low precipitation and temperature conditions,while the^(137)Cs concentration in the soil layer of the SL was generally uniform in the 0-0.18 m soil layer due to tillage-induced mixing.Low^(137)Cs inventories appeared at the summit and toe slope positions in the SL due to soil loss by tillage erosion and water erosion,respectively,while the highest^(137)Cs inventories appeared at the middle slope posi-tions due to soil accumulation under relatively flat landform conditions.In the GL,the^(137)Cs data showed that higher soil erosion rates appeared at the summit due to freeze-thaw erosion and steep slope gradients and at the toe slope position due to wind erosion,gully erosion,freeze-thaw erosion and overgrazing.The^(137)Cs inventory generally increased from upper to lower slope positions within each terrace(except the lowest terrace).The^(137)Cs data along the terrace toposequence showed abrupt changes in soil erosion rates between the lower part of the upper terrace and the upper part of the immediate terrace over a short distance and net deposition on the lower and toe terraces.Hence,tillage erosion played an important role in the soil loss at the summit slope positions of each terrace,while water erosion dominantly transported soil from the upper terrace to the lower terrace and resulted in net soil depos

关键词： Southeastern Tibetanplateau ^(137)Cs SoC Total N Soil erosion

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基于卡尔曼滤波的动力电池SoC估算

江苏大学学报（自然科学版） 2024年第1期45卷 24-29页

作者：徐立友马可杨晴霞宋林涛马小斌河南科技大学车辆与交通工程学院河南洛阳471000 河南凯瑞车辆检测认证中心有限公司河南焦作454000 焦作煤业集团物资供应处河南焦作454000

由于传统无迹卡尔曼滤波估算方法具有局限性,为了能准确估算动力电池荷电状态(state of charge,SoC),提出了一种基于无迹卡尔曼粒子滤波的动力电池SoC估算方法.以三元锂电池为研究对象,建立了电池二阶RC等效电路模型,通过对电池进行充... 详细信息

由于传统无迹卡尔曼滤波估算方法具有局限性,为了能准确估算动力电池荷电状态(state of charge,SoC),提出了一种基于无迹卡尔曼粒子滤波的动力电池SoC估算方法.以三元锂电池为研究对象,建立了电池二阶RC等效电路模型,通过对电池进行充放电试验辨识出模型参数,并验证模型准确性.采集了实际工况下的电池数据,分别用无迹卡尔曼滤波算法、粒子滤波算法和无迹卡尔曼粒子滤波算法估算电池SoC,在MATLAB中进行了仿真试验,并对估算的电池SoC进行比较.结果表明:无迹卡尔曼粒子滤波算法可以快速准确地估算出电池SoC,误差小于2.5%,优于另外2种算法.

关键词：三元锂电池 SoC 等效电路模型卡尔曼滤波电池管理系统

PSO-LSSVM-based Online SoC Estimation for Simulation Substation Battery

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Structural Durability & Health Monitoring 2022年第1期16卷 37-51页

作者： Qiang Zhang Xianguang Zha Jun Wu Liang Zhang Wei Dai Gang Ren Shiqian Li Ning Ji Xiangjun Zhu Fengwei Tian State Grid Jiangsu Electric Power Co. Ltd.Nanjing210024China State Grid Jiangsu Electric Power Company Research Institute Nanjing211103China Technican Training Center of State Grid Jiangsu Electric Power Co. Ltd.Suzhou215004China

As the emergency power supply for a simulation substation,lead-acid batteries have a work pattern featuring noncontinuous operation,which leads to capacity regeneration.However,the accurate estimation of battery state of charge(SoC),a measurement of the amount of energy available in a battery,remains a hard nut to crack because of the non-stationarity and randomness of battery capacity change.This paper has proposed a comprehensive method for lead-acid battery SoC estimation,which may aid in maintaining a reasonable charging schedule in a simulation substation and improving battery’s durability.Based on the battery work pattern,an improved Ampere-hour method is used to calculate the SoC during constant current and constant voltage(CC/CV)charging and discharging.In addition,the combined Particle Swarm Optimization(PSO)and Least Squares Support Vector Machine(LSSVM)model is used to estimate the SoC during non-CC discharging.Experimental results show that this method is workable in online SoC estimation of working batteries in a simulation substaion,with the maximum relative error standing at only 2.1%during the non-training period,indicating a high precision and wide applicability.

关键词： Simulation substation lead-acid batteries SoC PSO LSSVM

Correlation-driven threefold topological phase transition in monolayer OsBr_(2)

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Frontiers of physics 2023年第3期18卷 121-130页

作者： San-Dong Guo Yu-Ling Tao Wen-Qi Mu Bang-Gui Liu School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China

Spin–orbit coupling(SoC)combined with electronic correlation can induce topological phase transition,producing novel electronic states.Here,we investigate the impact of SoC combined with correlation effects on physical properties of monolayer OsBr_(2),based on first-principles calculations with generalized gradient approximation plus U(GGA+U)approach.With intrinsic out-of-plane magnetic anisotropy,OsBr_(2)undergoes threefold topological phase transition with increasing U,and valleypolarized quantum anomalous Hall insulator(VQAHI)to half-valley-metal dxy dx2−y2 dz2¯6m2(HVM)to ferrovalley insulator(FVI)to HVM to VQAHI to HVM to FVI transitions can be induced.These topological phase transitions are connected with sign-reversible Berry curvature and band inversion between/and orbitals.Due to symmetry,piezoelectric polarization of OsBr_(2)is confined along the in-plane armchair direction,and only one d11 is independent.For a given material,the correlation strength should be fixed,and OsBr_(2)may be a piezoelectric VQAHI(PVQAHI),piezoelectric HVM(PHVM)or piezoelectric FVI(PFVI).The valley polarization can be flipped by reversing the magnetization of Os atoms,and the ferrovalley(FV)and nontrivial topological properties will be suppressed by manipulating out-of-plane magnetization to in-plane one.In considered reasonable U range,the estimated Curie temperatures all are higher than room temperature.Our findings provide a comprehensive understanding on possible electronic states of OsBr_(2),and confirm that strong SoC combined with electronic correlation can induce multiple quantum phase transition.

关键词： correlation SoC phase transition piezoelectricity

嵌入式系统“FPGA+SoC”实践教学体系内容重构

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高等工程教育研究 2024年第1期 73-77页

作者：高俊枫黄乐天胡庆成都大学电子信息与电气工程学院电子科技大学电子科学与工程学院

基于FPGA的嵌入式SoC系统能弥补实践教学资源短缺、教学内容系统性不够、电路和系统开发相对脱节等问题。结合上述教学优势,本文从工程应用角度出发,系统性重构设计了方案规划、功能规划、设备控制、信号处理、系统控制和系统调测等实... 详细信息

基于FPGA的嵌入式SoC系统能弥补实践教学资源短缺、教学内容系统性不够、电路和系统开发相对脱节等问题。结合上述教学优势,本文从工程应用角度出发,系统性重构设计了方案规划、功能规划、设备控制、信号处理、系统控制和系统调测等实践教学内容,既有利于学生全面掌握不同系统功能的设计流程方法,又锻炼和培养学生的工程设计和实践开发能力,还通过直接观察设计底层电路和上层系统的联合工作过程,帮助学生提升专业知识的理解掌握程度,从而提升实践教育质量,满足工程教育认证和工程应用需求。

关键词：实践教学工程应用嵌入式系统 FPGA SoC

冲击载荷下不同荷电状态结构化锂离子电池负极响应分析

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力学季刊 2023年第2期44卷 306-315页

作者：刘思奇郑百林张锴张卓同济大学航空航天与力学学院上海200092

传统的锂离子电池研究多注重本身相关机理以及储能能力的提高,而结构化电池不仅能够储能,且可以作为结构本身承受一定载荷.本文设计了一种新型结构化电池石墨负极板,通过修正准静态下石墨的力学指标得到对应高应变率下的压缩应力-应变... 详细信息

传统的锂离子电池研究多注重本身相关机理以及储能能力的提高,而结构化电池不仅能够储能,且可以作为结构本身承受一定载荷.本文设计了一种新型结构化电池石墨负极板,通过修正准静态下石墨的力学指标得到对应高应变率下的压缩应力-应变曲线、失效应变,采用数值分析方法对石墨负极板的承载能力进行了分析.同时,由于荷电状态(State of charge, SoC)会影响石墨的弹性模量、失效应变、厚度以及压缩应力-应变曲线等力学性能,因此在石墨的本构方程中考虑并修正了SoC产生的影响.通过有限元模拟了不同SoC下石墨负极板受到冲击后的响应,结果表明随着应变率或SoC增大,石墨负极板承载高速冲击的能力也随之降低.本文的研究成果可以为结构化电池负极的结构设计提供参考.

关键词：结构化锂离子电池 SoC 石墨负极率相关耦合本构冲击载荷仿真

基于动态下垂系数与SoC基点的储能一次调频控制策略

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电力系统保护与控制 2021年第5期49卷 1-10页

作者：李军徽高卓应鸿林琳沈宝兴范兴凯现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学) 吉林吉林132012 浙江华云清洁能源有限公司浙江杭州310001 广东电网公司韶关供电局广东韶关512026

为高效利用储能资源满足电网一次调频需求,提出一种基于动态下垂系数与动态SoC基点(Dynamic Droop Coefficient and Dynamic Reference of SoC,DDC&DRSoC)的储能一次调频控制策略。提出以电网调频死区为分割边界将储能调频过程划分为调... 详细信息

为高效利用储能资源满足电网一次调频需求,提出一种基于动态下垂系数与动态SoC基点(Dynamic Droop Coefficient and Dynamic Reference of SoC,DDC&DRSoC)的储能一次调频控制策略。提出以电网调频死区为分割边界将储能调频过程划分为调频阶段与SoC恢复阶段:在调频阶段,以SoC和最大频率偏差为控制量自适应调整储能出力深度以防止储能SoC的饱和或殆尽;在SoC恢复阶段,首先提出适应负荷变化的动态SoC恢复基点调整方法,然后提出兼顾SoC恢复需求与电网承受能力的储能出力确定方法,最后设计双层模糊控制器实现动态SoC基点值和储能出力值的确定。提出3个评价指标评估一次调频效果与SoC维持效果。以某区域电网为例,在阶跃负荷扰动和连续负荷扰动下验证了所提策略的有效性。仿真结果表明所提策略SoC维持效果较对比策略提高9%,调频效果提高4%。

关键词：储能 SoC 一次调频控制策略风力发电

The effects of co-utilizing green manure and rice straw on soil aggregates and soil carbon stability in a paddy soil in southern China

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Journal of Integrative Agriculture 2023年第5期22卷 1529-1545页

作者： ZHANG Zi-han NIE Jun LIANG Hai WEI Cui-lan WANG Yun LIAO Yu-lin LU Yan-hong ZHOU Guo-peng GAO Song-juan CAO Wei-dong College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095P.R.China Soil and Fertilizer Institute of Hunan Province Hunan Academy of Agricultural SciencesChangsha 410125P.R.China College of Environment and Ecology Jiangsu Open UniversityNanjing 210036P.R.China Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081P.R.China

The co-utilization of green manure (GM) and rice straw (RS) in paddy fields has been widely applied as an effective practice in southern China.However,its effects on soil aggregate and soil organic carbon (SoC) stability remain unclear.In the present study,the effect of GM,RS,and co-utilization of GM and RS on particle size distribution of soil aggregates and SoC density fractions were measured in a field experiment.The experiment included six treatments,i.e.,winter fallow (WF) without RS return (Ctrl),WF with 50%RS return (1/2RS),WF with 100%RS return (RS),GM without RS return (GM),GM with 50%RS return (GM1/2RS) and GM with 100%RS return (GMRS).The results showed that the proportion of small macro-aggregates (0.25–2 mm) and the mean weight diameter (MWD) of aggregates in the GMRS treatment was greater (by 18.9 and 3.41%,respectively) than in the RS treatment,while the proportion of silt+clay particles (SoC in microaggregates (0.053–0.25 mm)and silt+clay particles was higher in the GMRS treatment than in GM and RS treatments individually.The concentration and proportion of free light organic carbon (fLOC) in aggregates of various particle sizes and bulk soil was greater in the GMRS treatment than the RS treatment,whereas the concentration and proportion of mineral-asSoCiated organic carbon in small macroaggregates,microaggregates,and bulk was lower in the GMRS treatment than in the RS treatment.The proportion of intra-aggregate particulate organic carbon (iPOC) was greater in the GMRS treatment than in GM treatment.The GMRS treatment had strong positive effects on iPOC in small macroaggregates,suggesting that SoC was transferred from fLOC to iPOC.In conclusion,co-utilizing green manure and rice straw cultivated the SoC pool by increasing the concentration of fLOC and improved soil carbon stability by promoting the sequestration of organic carbon in iPOC as a form of physical protection.

关键词： soil aggregation milk vetch rice straw SoC density fractions C stability paddy soil