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Dynamic Setting Method of Assessment Indicators for Power Curves of Renewable Energy Sources Considering Scarcity of Reserve Resources

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 101-114页

作者： Minghao Cao jilai Yu the Department of Electrical Engineering Harbin Institute of TechnologyHarbinChina

With the increasing proportion of renewable energy sources(RESs)in power grid,the reserve resource(RR)scarcity for correcting power deviation of RESs has become a potential issue.Consequently,the power curve of RES needs to be more rigorously assessed.The RR scarcity varies during different time periods,so the values of assessment indicators should be dynamically adjusted.The assessment indicators in this paper include two aspects,i.e.,deviation exemption ratio and penalty price.Firstly,this paper proposes a method for dynamically calculating the supply capacity and RR cost,primarily taking into account the operating status of thermal units,forecast information of RES,and load curve.Secondly,after clarifying the logical relationship between the degree of RR scarcity and the values of assessment indicators,this paper establishes a mapping function between them.Based on this mapping function,a dynamic setting method for assessment indicators is proposed.In the future,RES will generally be equipped with battery energy storage systems(BESSs).Reasonably utilizing BESSs to reduce the power deviation of RESs can increase the expected income of RESs.Therefore,this paper proposes a power curve optimization strategy for RESs considering self-owned BESSs.The case study demonstrates that the dynamic setting method of assessment indicators can increase the revenue of RESs while ensuring that the penalty fees paid by RESs to the grid are sufficient to cover the RR costs.Additionally,the power curve optimization strategy can help RESs further increase income and fully utilize BESSs to reduce power deviation.

关键词： Renewable energy battery energy storage system(BESS) power curve assessment reserve service parameter setting

Dynamic stiffness characteristics of aero-engine elastic support structure and its effects on rotor systems:mechanism and numerical and experimental studies

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Applied Mathematics and Mechanics(English Edition) 2023年第2期44卷 221-236页

作者： Lei LI Zhong LUO Kaining LIU jilai zhou School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China Northeastern UniversityShenyang 110819China Foshan Graduate School of Innovation Northeastern UniversityFoshan 528312Guangdong ProvinceChina

The support structure of a rotor system is subject to vibration excitation,which results in the stiffness of the support structure varying with the excitation frequency(i.e.,the dynamic stiffness).However,the dynamic stiffness and its effect mechanism have been rarely incorporated in open studies of the rotor system.Therefore,this study theoretically reveals the effect mechanism of dynamic stiffness on the rotor system.Then,the numerical study and experimental verification are conducted on the dynamic stiffness characteristics of a squirrel cage,which is a common support structure for aero-engine.Moreover,the static stiffness experiment is also performed for comparison.Finally,a rotor system model considering the dynamic stiffness of the support structure is presented.The presented rotor model is used to validate the results of the theoretical analysis.The results illustrate that the dynamic stiffness reduces the critical speed of the rotor system and may lead to a new resonance.

关键词： dynamic stiffness squirrel cage rotor system dynamic characteristic critical speed

Coordinated Dispatch Based on Distributed Robust Optimization for Interconnected Urban Integrated Energy and Transmission Systems

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 840-851页

作者： Wei Xu Yufeng Guo Tianhui Meng Yingwei Wang jilai Yu the School of Electrical Engineering and Automation Harbin Institute of Technology

To improve the economic efficiency of urban integrated energy systems(UIESs) and mitigate day-ahead dispatch uncertainty, this paper presents an interconnected UIES and transmission system(TS) model based on distributed robust optimization. First, interconnections are established between a TS and multiple UIESs, as well as among different UIESs, each incorporating multiple energy forms. The Bregman alternating direction method with multipliers(BADMM) is then applied to multi-block problems, ensuring the privacy of each energy system operator(ESO). Second, robust optimization based on wind probability distribution information is implemented for each ESO to address dispatch uncertainty. The column and constraint generation(C&CG) algorithm is then employed to solve the robust model. Third, to tackle the convergence and practicability issues overlooked in the existing studies, an external C&CG with an internal BADMM and corresponding acceleration strategy is devised. Finally, numerical results demonstrate that the adoption of the proposed model and method for absorbing wind power and managing its uncertainty results in economic benefits.

关键词： Heating systems Convex functions Optimization Uncertainty Pipelines Distributed algorithms Convergence

Experimental and simulation studies on similitude design method for shock responses of beam-plate coupled structure

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Applied Mathematics and Mechanics(English Edition) 2023年第6期44卷 917-930页

作者： Lei LI Zhong LUO Fengxia HE jilai zhou HuiMA HuiLI School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China Northeastern UniversityShenyang 110819China Foshan Graduate School of Innovation Northeastern UniversityFoshan 528312Guangdong ProvinceChina School of Mechanical Engineering Shenyang Jianzhu UniversityShenyang 110819China

The similitude theory helps to understand the physical behaviors of large structures through scaled models. Several papers have studied the similitude of shock issues. However, the dynamic similitude for shock responses of coupled structures is rarely incorporated in open studies. In this paper, scaling laws are derived for the shock responses and spectra of coupled structures. In the presented scaling laws, the geometric distortion and energy loss are considered. The ability of the proposed scaling laws is demonstrated in the simulation and experimental cases. In both cases, the similitude prediction for the prototype's time-domain waveform and spectrum is conducted with the scaled model and scaling laws. The simulation and experimental cases indicate that the predicted shock responses and spectra agree well with those of the prototype, which verifies the proposed scaling laws for predicting shock responses.

关键词： partial similitude scaling law shock response coupled structure virtual mode synthesis simulation(VMSS) statistical energy analysis(SEA)

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风电机组结构动力响应研究

可再生能源 2024年第1期42卷 51-56页

作者：饶吉来中煤科工集团重庆研究院有限公司重庆400039 煤矿灾害防控全国重点实验室重庆400037

针对风电机组动力响应引起的稳定性问题,文章研究了不同风速下的叶片与塔架一体化风力机数值响应情况。基于SolidWorks建立风力机三维结构模型,提取叶根和叶尖质点,利用有限元分析法,分析不同风速变化情况下的应力及位移变化趋势。对风... 详细信息

针对风电机组动力响应引起的稳定性问题,文章研究了不同风速下的叶片与塔架一体化风力机数值响应情况。基于SolidWorks建立风力机三维结构模型,提取叶根和叶尖质点,利用有限元分析法,分析不同风速变化情况下的应力及位移变化趋势。对风力机摆振方向与挥舞方向的风速衰减进行研究,探讨了叶片表面附近流场剪应力分布。结果表明:在不同风速下,叶尖、叶根应力及位移变化呈现一定的规律性;在自然风经过风力机时,风能被有效捕获,进而呈现规律性衰减。研究结果为风力机运行动力学提供了参考。

关键词：风速应力位移数值分析风能捕获

赣南地方志史料在高中历史教学中的应用——以近代中国经济结构的变动为例

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内蒙古师范大学学报（教育科学版） 2024年第1期37卷 82-88页

作者：崔继来赣南师范大学历史文化与旅游学院江西赣州341000

近代中国经济结构的变动是高中历史重要的知识点和高考考点,整合统编版高中历史教科书中的知识点,并合理选用史料实证近代中国经济结构变动的多样性和复杂性是课标要求。民族资本主义的产生与发展是近代中国经济结构变动的内容之一,江... 详细信息

近代中国经济结构的变动是高中历史重要的知识点和高考考点,整合统编版高中历史教科书中的知识点,并合理选用史料实证近代中国经济结构变动的多样性和复杂性是课标要求。民族资本主义的产生与发展是近代中国经济结构变动的内容之一,江西民族资本主义的发展轨迹既有近代中国民族资本主义发展的一般特征,又有其自身特点。《江西通志稿》《赣县新志稿》等相关记载为教学素材,是引导学生思考近代中国经济结构变动多样性和复杂性的典型案例。地方志史料作为地方文献中的大宗,用于高中历史教学可以加强学生对家乡、民族、国家的认同感,有助于教学目标达成。

关键词：高中历史教学近代中国经济结构变动地方志赣南

京津冀城市群数字物流对商贸流通业发展效益的影响研究——基于资源错配的中介效应

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商业经济研究 2024年第8期 181-184页

作者：孙明辉刘继来河北北方学院经济管理学院河北张家口075000 北京航空航天大学经济管理学院北京100191

随着数字经济与物流业结合更加紧密,探讨数字物流如何赋能商贸流通业发展具有重要的研究意义。因此,本文基于2011-2021年京津冀城市群13个地级市面板数据,实证分析数字物流对流通业发展效益的影响效应及作用机制。研究表明,京津冀城市... 详细信息

随着数字经济与物流业结合更加紧密,探讨数字物流如何赋能商贸流通业发展具有重要的研究意义。因此,本文基于2011-2021年京津冀城市群13个地级市面板数据,实证分析数字物流对流通业发展效益的影响效应及作用机制。研究表明,京津冀城市群数字物流可以显著提升商贸流通业发展效益,且这一影响结论经过了一系列稳健性检验。通过影响机制发现,京津冀城市群数字物流可以通过缓解土地资源、劳动力资源错配助推商贸流通业发展效益提升。最后,本文就基础设施建设、资源配置、市场监管等方面提出政策建议。

关键词：数字物流商贸流通业发展效益资源错配京津冀

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共封装硒肽和VE微胶囊制备及其理化特性

食品科学 2024年第1期45卷 181-190页

作者：蔡杰方媛贾继来张碟丛欣程水源武汉轻工大学硒科学与工程现代产业学院国家富硒农产品加工技术研发专业中心湖北省绿色富硒农产品精深加工技术研发工程中心湖北武汉430023 武汉轻工大学大宗粮油精深加工教育部重点实验室农产品加工与转化湖北省重点实验室湖北武汉430023 恩施德源硒材料工程科技有限公司湖北恩施445000

通过乳化-冷冻干燥联合技术构建微胶囊体系,以实现对具有不同极性的物质(亲水性硒肽和亲脂性VE)的稳态化共封装。以包埋率作为参考,通过单因素试验考察壁材浓度、硒肽和VE含量等工艺参数对包埋效果的影响。傅里叶变换红外光谱和扫描电... 详细信息

通过乳化-冷冻干燥联合技术构建微胶囊体系,以实现对具有不同极性的物质(亲水性硒肽和亲脂性VE)的稳态化共封装。以包埋率作为参考,通过单因素试验考察壁材浓度、硒肽和VE含量等工艺参数对包埋效果的影响。傅里叶变换红外光谱和扫描电子显微镜图像表明微胶囊能够有效封装硒肽和VE,并且具有较好的水分散性,复溶后仍保持双重乳液结构。热稳定性分析和2,2’-联氮双(3-乙基苯并噻唑啉-6-磺酸)阳离子自由基清除实验结果证实,相比于硒肽粉末,微胶囊具有更高的热稳定性和抗氧化活性。电子鼻分析结果进一步证实微胶囊体系对硒肽自身异味具有较好的遮掩效果。体外模拟消化实验表明,微胶囊封装提高了硒肽在模拟胃液中的稳定性,并且硒肽在模拟肠液具有更低的保留率,能够被有效释放。相关研究结论将为富硒功能性食品营养补充剂的开发提供理论依据。

关键词：硒肽 VE 共封装乳液微胶囊

隧道牵引分区所雷击暂态特性及其二次设备电磁兼容研究

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高压电器 2024年第1期60卷 108-117页

作者：王继来王朋成张威振张国钢中铁第一勘察设计院集团有限公司西安710043 西安交通大学电力设备电气绝缘国家重点实验室西安710049

牵引供电系统遭受雷击会在分区所内产生过电压与过电流,对分区所开关柜中二次设备产生瞬态电磁干扰,影响其正常运行。文中针对电气化铁路隧道分区所,建立雷击暂态仿真模型,计算了接触网不同位置遭受雷击时分区所的过电压与过电流,建立了... 详细信息

牵引供电系统遭受雷击会在分区所内产生过电压与过电流,对分区所开关柜中二次设备产生瞬态电磁干扰,影响其正常运行。文中针对电气化铁路隧道分区所,建立雷击暂态仿真模型,计算了接触网不同位置遭受雷击时分区所的过电压与过电流,建立了27.5 kV开关柜的电磁场有限元仿真模型,分析开关柜中不同区域的瞬态电场、磁场分布。结果表明:雷击接触网会在分区所内产生幅值较大、频率较高的过电压与过电流,在其作用下开关柜低压室瞬态电场可达147.2 V/m、瞬态磁场可达1.3 kA/m,断路器室前壁处瞬态电场可达822.9 kV/m、瞬态磁场可达15.85 kA/m,超过标准规定的幅值,二次设备需要考虑相应的电磁屏蔽措施。论文结果对牵引供电系统雷击过电压/电流防护以及二次设备电磁兼容设计具有参考价值。

关键词：隧道牵引供电系统分区所雷击暂态特性开关柜二次设备电磁兼容