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Virtual Inertia Estimation Method of DFIG-based Wind Farm with Additional Frequency Control

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Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1076-1087页

作者： pengwei chen chenchen Qi Xin chen Jiangsu Key Laboratory of New Energy Generation and Power Conversion College of Automation EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina

With the increasing penetration of wind power,using wind turbines to participate in the frequency regulation to support power system has become a clear consensus.To accurately quantify the inertia provided by the doubly-fed induction generator(DFIG)based wind farm,the frequency response model of DFIG with additional frequency control is established,and then by using Routh approximation,the explicit expression of the virtual moment of inertia is derived for the DFIG gridconnected system.To further enhance the availability of the expression,an estimation method is proposed based on the matrix pencil method and the least squares algorithm for estimating the virtual moment of inertia provided by the wind farm.Finally,numerical results tested by a DFIG grid-connected system and a modified IEEE 30-bus system verify the derived expression of the virtual moment of inertia and the proposed estimation method.

关键词： Doubly-fed induction generator(DFIG) additional frequency control virtual moment of inertia matrix pencil method least squares algorithm

Fiber‑Optic Microfiber:Tracking Activity Enhancement and Suppression of Heterogeneous Photocatalysts

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Advanced Fiber Materials 2023年第2期5卷 527-542页

作者： Yunyun Huang Jiaxuan Liang pengwei chen Jiaxin Wan Haotian Wu Xiaolan Wu Aoxiang Xiao Bai‑Ou Guan Jinan University Guangzhou 511400China Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhou 511443China

Obtaining detailed insight into the photocatalytic performance of heterogeneous photocatalytic materials,is important for evaluating material properties as well as guiding material design.However,capture of the detailed matter changes on a photocatalyst surface in real time,and in situ during photocatalysis remains challenging.This work reports a promising optical microfiber sensor integrating a photocatalytic reaction monolayer on an optical microfiber surface to monitor reaction kinetics using Cu_(2)O-based heterogeneous photocatalysts,as an example.The evanescent field of microfiber is used to track the photocatalytic process in real time,through the interaction with the catalytic layer,by monitoring the surface refractive index changes caused by adsorption and degradation.Since the catalytic layer is less than 1µm thick,the typical high-power light source can be replaced by low-power light irradiation.This method successfully reveals that relative to the pristine Cu_(2)O microspheres,the photocatalytic activity is enhanced by the incorporation of Ti_(3)C_(2)T_(x) MXene into Cu_(2)O,whereas incorporation of CdS into Cu_(2)O suppresses the activity.Compared with the existing methods used for photocatalysis evalu-ation,this optical microfiber can be directly employed in real matrices to track local photocatalytic performance.It can also provide details about the different adsorption/degradation kinetics of photocatalysts.It is suitable for most photocatalytic processes and is not limited to pollutants with characteristic UV–visible absorption spectra.This study provides important inspiration for the future development of in situ,real-time reaction assessment.

关键词： Photocatalysis around microfiber Tracking Heterogeneous photocatalysts Activity enhancement Suppression

面向新质生产力:构建与新技术相适应的知识产权规则体系

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知识产权 2024年第5期 60-81页

作者：徐棣枫陈鹏玮南京大学法学院

知识产权法是与新技术具有紧密联系的关键上层建筑,知识产权规则应回应、激励并引领新技术发展,应站位中国视角重构知识产权与新技术的关系。面对新技术对于既有知识产权规则的挑战,不应一概调整规则,首先要充分挖掘现有规则价值。对于... 详细信息

知识产权法是与新技术具有紧密联系的关键上层建筑,知识产权规则应回应、激励并引领新技术发展,应站位中国视角重构知识产权与新技术的关系。面对新技术对于既有知识产权规则的挑战,不应一概调整规则,首先要充分挖掘现有规则价值。对于难以直接解决的真问题,需要改进知识产权规则以适应新技术的发展,包括在发展中治理的进路、人本主义立场的选择和经典问题研究的强调,应当重视诚实信用原则、程序探索和交叉学科交融。最终使得知识产权规则体系容纳新技术、适应新技术进而赋能新技术,强化加快形成新质生产力的制度供给,实现新技术与知识产权规则体系同频共振的理想目标。

关键词：新技术知识产权新质生产力人本主义诚实信用

燃料电池-锂电池混合供电系统的无源控制策略及参数设计方法

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电工技术学报 2024年第2期39卷 580-594页

作者：敖文杰陈家伟陈杰陈鹏伟重庆大学自动化学院重庆400044 南京航空航天大学自动化学院南京211106

多源混合供电技术可有效地利用不同供电单元性能,在电气化交通系统中得到广泛应用。然而,随着越来越多的恒功率特性及强脉动特性负载接入供电系统,系统的稳定性难以得到保证。针对传统线性控制方法难以保证系统的大信号稳定性,而现有非... 详细信息

多源混合供电技术可有效地利用不同供电单元性能,在电气化交通系统中得到广泛应用。然而,随着越来越多的恒功率特性及强脉动特性负载接入供电系统,系统的稳定性难以得到保证。针对传统线性控制方法难以保证系统的大信号稳定性,而现有非线性控制的研究仍缺乏兼顾稳定性和动态性能的控制参数设计方法的问题,该文对燃料电池-锂电池混合供电系统设计基于无源控制和扩张高增益状态观测器的复合控制方法,并对控制器和观测器参数进行了设计,有效地保证了系统的动静态性能。在实验室搭建一套额定功率为3 kW的燃料电池-锂电池混合供电系统实验平台进行测试,结果验证了所提控制策略和参数设计方法的有效性和正确性。

关键词：无源控制参数设计扩张高增益状态观测器混合供电系统

Interval optimal power flow applied to distribution networks under uncertainty of loads and renewable resources

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Journal of Modern Power Systems and Clean Energy 2019年第1期7卷 139-150页

作者： pengwei chen Xiangning XIAO Xuhui WANG North China Electric Power University Hefei University of Technology

Optimal power flow(OPF) has been used for energy dispatching in active distribution networks.To satisfy constraints fully and achieve strict operational bounds under the uncertainties from loads and sources, this paper derives an interval optimal power flow(I-OPF)method employing affine arithmetic and interval Taylor expansion.An enhanced I-OPF method based on successive linear approximation and second-order cone programming is developed to improve solution accuracy.The proposed methods are benchmarked against Monte Carlo simulation(MCS) and stochastic OPF.Tests on a modified IEEE 33-bus system and a real 113-bus distribution network validate the effectiveness and applicability of the proposed methods.

关键词： Active distribution network Optimal power flow Interval uncertainty Affine arithmetic Second-order cone programming

基于成果导向的大学体育专业篮球普修教学设计

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湖北文理学院学报 2024年第3期45卷 76-81页

作者：倪科陈鹏伟江西理工大学体育与艺术学院江西赣州341000

以学生为中心、以学生成果为导向、以持续改进为重点,在成果导向三要素的指导下,运用反向设计原则,利用互联网技术结合当代学生的性格特点对学生进行开放式的线上教学与线下教学相结合的方法,对普通高校体育专业学生篮球普修教学的内容... 详细信息

以学生为中心、以学生成果为导向、以持续改进为重点,在成果导向三要素的指导下,运用反向设计原则,利用互联网技术结合当代学生的性格特点对学生进行开放式的线上教学与线下教学相结合的方法,对普通高校体育专业学生篮球普修教学的内容进行重塑。以江西理工大学2022级体育专业学生为实验对象,采用文献资料法、实验法、问卷调查法、数据统计法、访谈法对其篮球普修教学设计进行研究,结果发现:基于成果导向理念下的教学设计对培养学生的学习兴趣有着更积极的作用;实验班学生基本的篮球技战术能力明显优于对照班,基于成果导向的大学体育专业篮球普修教学设计方案可行;基于成果导向理念下的篮球普修课教学比传统模式的教学更能提高学生对于篮球运动的了解程度。

关键词：成果导向篮球普修教学设计普通高校

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R20机器人仿真分析与试验

机械制造与自动化 2024年第2期53卷 188-192页

作者：陈朋威高飞邬凯陕西工业职业技术学院机械工程学院陕西咸阳712099 太原理工大学机械与运载工程学院山西太原030024

以串联关节机器人为研究对象,根据机器人结构参数建立D-H法的机器人运动学模型,推导机器人运动学方程。使用ADAMS软件对机器人进行动力学仿真分析,计算各关节驱动力矩随时间变化的数据,将动力学计算的各关节最大动载荷作为机器人结构设... 详细信息

以串联关节机器人为研究对象,根据机器人结构参数建立D-H法的机器人运动学模型,推导机器人运动学方程。使用ADAMS软件对机器人进行动力学仿真分析,计算各关节驱动力矩随时间变化的数据,将动力学计算的各关节最大动载荷作为机器人结构设计和有限元计算的力学条件,对机器人铸件进行有限元仿真分析,搭建实验平台,对机器人位置重复性、姿态重复性、重复定位精度、位置稳定时间和位置超调量进行测试,对实验数据进行整理和分析。仿真计算和实验结果表明:该机器人设计合理,满足设计指标要求。

关键词：机器人运动学有限元 ADAMS

维普期刊数据库博看期刊

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主动变径式管道机器人机构设计与性能分析

机械制造与自动化 2024年第1期53卷 214-217,237页

作者：陈朋威高飞贾超钰陕西工业职业技术学院机械工程学院陕西咸阳712000 太原理工大学机械与运载工程学院山西太原030024

研制一种具有主动变径机构的圆形管道机器人。设计具有3组独立控制驱动模块的机器人机构,对机器人进行位姿和力学分析,描述了机器人在典型位姿条件下的力学特性。制作机器人实验样机,使用ADAMS软件对机器人进行运动仿真计算,对机器人在... 详细信息

研制一种具有主动变径机构的圆形管道机器人。设计具有3组独立控制驱动模块的机器人机构,对机器人进行位姿和力学分析,描述了机器人在典型位姿条件下的力学特性。制作机器人实验样机,使用ADAMS软件对机器人进行运动仿真计算,对机器人在管道内部的姿态适应性和摩擦条件适应性进行实验验证。仿真计算和实验研究结果验证了该机器人机构设计的合理性和较好的管道适应性。

关键词：管道机器人变径机构 ADAMS

Genesis and Accumulation of Paleo-Oil Reservoir in Dabei Area,Kuqa Depression,Northwest China:Implications for Tight-Gas Accumulation

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Journal of Earth Science 2024年第2期35卷 655-665页

作者： Fujie Jiang Xiao chen pengwei Wang Xinghe Shao Haijun Yang State Energy Center for Shale Oil Research and Development Beijing102206China National Key Laboratory of Oil and Gas Resources and Engineering Beijing102249China College of Geosciences China University of PetroleumBeijing102249China CNOOC International Ltd. Beijing100027China Research Institute of Petroleum Exploration&Production SINOPECBeijing100083China Research Institute of Petroleum Exploration and Development Tarim OilfieldPetroChinaKorla841000China

Paleo-oil reservoir is of great importance to understand hydrocarbon enrichment mechanism and hydrocarbon exploration potential,but is yet poorly investigated in Kuqa Depression.The occurrence of the paleo-oil reservoir in Dabei area was proved by quantitative grain fluorescence(QGF)and fluid inclusion petrography.Development history of the paleo-oil reservoir was reconstructed through:(1)oil-source correlation;(2)time coupling of source rock maturation,porosity evolution and migration pathways.The impact of paleo-oil reservoir on tight-gas accumulation was consequently discussed.Results suggest that considerable oil was accumulated in the K_(1)bs reservoir with paleo oil-water contact in Dabei 2 Well and Dabei 201 Well at 5800 and 6040 m,respectively.Crude oil was primarily sourced from Triassic source rocks with Jurassic source rocks of secondary importance,which was at oil generation window(0.7%–1.1%Ro)during 9–6 and 7.5–5 Ma,respectively.The occurrence of K_(1)bs tight reservoir(porosity<12%)was about 25 Ma,while faults and associated fractures at Kelasue structural belt were developed approximately from 8 to 3.5 Ma.Therefore,the tight oil accumulation was formed during 8–5 Ma.The paleo-oil reservoir in Dabei 1 gas field was destroyed by the evaporation fractionation in later stage.

关键词： Paleo-oil reservoir Dabei area Kuqa Depression Northwest China petroleum geology