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基于ETAP的海上油田群电力系统组网暂态稳定性仿真分析

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电气应用 2024年第5期43卷 8-14页

作者：袁杰杜银昌许建奎徐建东李璇海洋石油工程股份有限公司天津300451

随着海上油气田规模越来越大,平台间电力组网已非常常见。电力系统规模的增大,对系统的安全性和稳定性提出了更高的要求。其中电力系统的暂态稳定性就是一个必须重视的问题。当供电系统出现操作或故障引起的扰动后,可能造成电力系统的... 详细信息

随着海上油气田规模越来越大,平台间电力组网已非常常见。电力系统规模的增大,对系统的安全性和稳定性提出了更高的要求。其中电力系统的暂态稳定性就是一个必须重视的问题。当供电系统出现操作或故障引起的扰动后,可能造成电力系统的振荡甚至崩溃,影响系统的正常供电。以某油田群电力系统组网为研究对象,针对常见的平台操作和海上故障,通过ETAP进行了暂态稳定性的仿真分析,给出了操作建议,对平台电力系统操作有重要意义。

关键词： ETAP仿真海洋油气平台电力组网暂态稳定性

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Effects of Rattling Behavior of K and Cd Atoms along Different Directions in Anisotropic KCdAs on Lattice Thermal Transport and Thermoelectric Properties

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Energy & Environmental Materials 2024年第6期7卷 388-398页

作者： Yue Wang yinchang Zhao Jun Ni Zhenhong Dai Department of Physics Yantai UniversityYantai 264005China State Key Laboratory of Low-Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China

We employ advanced first principles methodology,merging self-consistent phonon theory and the Boltzmann transport equation,to comprehensively explore the thermal transport and thermoelectric properties of ***,the study accounts for the impact of quartic anharmonicity on phonon group velocities in the pursuit of lattice thermal conductivity and investigates 3ph and 4ph scattering processes on phonon *** various methodologies,including examining atomic vibrational modes and analyzing 3ph and 4ph scattering processes,the article unveils microphysical mechanisms contributing to the lowκL within *** features include significant anisotropy in Cd atoms,pronounced anharmonicity in K atoms,and relative vibrations in non-equivalent As atomic *** atoms,situated between As layers,exhibit rattling modes and strong lattice anharmonicity,contributing to the observed lowκ*** flat bands near the valence band maximum translate into high PF,aligning with ultralowκL for exceptional thermoelectric *** optimal temperature and carrier concentration doping,outstanding ZT values are achieved:4.25(a(b)-axis,p-type,3×10^(19)cm^(−3),500 K),0.90(c-axis,p-type,5×10^(20)cm^(−3),700 K),1.61(a(b)-axis,n-type,2×10^(18)cm^(−3),700 K),and 3.06(c-axis,n-type,9×10^(17)cm^(−3),700 K).

关键词： anharmonic lattice dynamics electron transport characteristics first principles calculation lattice thermal transport octahedron thermoelectric properties

Multi-layer magnetic recording driven by a tunable laser

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Chinese Optics Letters 2020年第10期18卷 63-68页

作者： Xiaoqiang Zhang Guanghao Rui Yong Xu Fan Zhang yinchang du Mingtao Lian Xiaoyang Lin Anting Wang Hai Ming Weisheng Zhao Hefei Innovation Research Institute School of MicroelectronicsBeihang UniversityHefei 230013China Fert Beijing Institute BDBCBeihang UniversityBeijing 100191China Advanced Photonics Center Southeast UniversityNanjing 210096China Department of Optics and Optical Engineering University of Science and Technology of ChinaHefei 230026China

All-optical magnetization switching with features of low-power consumption and high writing speed is a promising road map to satisfy the demand for volume data storage. To promote denser and faster magnetic recording technologies, herein, all-optical helicity-dependent switching(AO-HDS) in multi-layer magnetic recording is proposed based on the chromatic aberration of an optical lens(Thorlabs’ s N-BK7 plano-convex uncoated lens).The power of the incident beams and the thickness of the multi-layer magnetic recording film are designed carefully. Besides, the uniformity of this multi-layer magnetic recording is optimized. At last, a prototype system of information multiplexing based on this multi-layer magnetic recording technology is constructed as well. Flexible and controllable magnetization reversals in different layers are also demonstrated by tuning the wavelength and helicity of working beams. We believe that such a prototype system can pave the way for increasing the storage density in an effective and low-cost mode.

关键词： all-optical magnetization switching multi-level magnetic recording focal shift chromatic aberration

Spintronic terahertz emitter with integrated electromagnetic control

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Chinese Optics Letters 2022年第4期20卷 77-81页

作者： Yunqing Jiang Xiaoqiang Zhang Yongshan Liu Pierre Vallobra Sylvain Eimer Fan Zhang yinchang du Fengguang Liu Yong Xu Weisheng Zhao School of Integrated Circuit Science and Engineering Hefei Innovation Research InsitituteBeihang UniversityBeijing 100191China Anhui High Reliability Chips Engineering Laboratory Hefei 230013China Key Laboratory of Geospace Environment University of Science and Technology of ChinaHefei 230026China

Spintronic thin films are considered as one of the promising terahertz(THz)source candidates,owing to their high performance and low *** effort has been made to achieve spintronic THz sources with broadband and high conversion ***,the development of spintronic THz emitters with good compatibility,low cost,and miniaturized technology still faces many ***,it is urgent to extend commercial and portable spintronic THz emitters to satisfy many practical ***,we design a new generation of spintronic THz emitters composed of an alter-nating electromagnet and a miniaturized electronic *** only can this new type of spintronic THz emitter largely simplify the ancillary equipment for spintronic sources,it also has a twice larger THz signal compared to the traditional THz time-domain spectroscopy systems with a mechanical *** results and theoretical calculations for electromagnetic coils show that our design can stably generate THz signals that are independent of the frequency and magnetic field of alternating *** the spin thin film is optimized,a magnetic field as low as 75 G satisfies the require-ment for high performance THz ***,not only is the efficiency of the pump power enhanced,but also the driving current in the electromagnet is *** believe that it has a wide range of applications and profound implications in THz technology based on spintronic emitters in the future.

关键词： spintronic THz emitters trilayer heterostructure electromagnet electrically driven control

慢性病轨迹框架护理干预对高血压脑出血患者心理及自我管理能力的影响研究

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智慧健康 2023年第7期9卷 187-190页

作者：杜银嫦罗定市人民医院广东罗定527200

目的探讨慢性病轨迹框架护理干预对高血压脑出血患者心理及自我管理能力的影响。方法选取2021年3月-2022年5月本院收治的高血压脑出血患者110例,随机分为观察组与对照组,每组各55例。对照组患者接受神经外科常规护理干预,观察组在神... 详细信息

目的探讨慢性病轨迹框架护理干预对高血压脑出血患者心理及自我管理能力的影响。方法选取2021年3月-2022年5月本院收治的高血压脑出血患者110例,随机分为观察组与对照组,每组各55例。对照组患者接受神经外科常规护理干预,观察组在神经外科常规护理基础上实施慢性病轨迹框架护理干预。比较两组SAS评分、SDS评分、ADL评分、ESCA评分、护理满意度和并发症发生率。结果干预前,两组SAS评分、SDS评分、ADL评分、ESCA评分无显著差异(P>0.05);干预后,观察组SAS评分、SDS评分显著低于对照组(P<0.05),ADL评分和ESCA评分在统计学上明显比对照组高一些(P<0.05)。观察组护理满意度(94.55%)显著优于对照组(78.18%)(P<0.05)。与对照组并发症发生率(29.09%)相比,观察组并发症发生率(5.45%)统计学上更低一些(P<0.05)。结论对高血压脑出血患者应用慢性病轨迹框架干预能改善患者心理状态,提高日常生活能力和自我管理能力,降低并发症发生率。

关键词：慢性病轨迹框架高血压脑出血心理自我管理

Knowledge-guided machine learning reveals pivotal drivers for gasto-particle conversion of atmospheric nitrate

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Environmental Science and Ecotechnology 2024年第3期19卷 100-108页

作者： Bo Xu Haofei Yu Zongbo Shi Jinxing Liu Yuting Wei Zhongcheng Zhang Yanqi Huangfu Han Xu Yue Li Linlin Zhang yinchang Feng Guoliang Shi State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Tianjin Key Laboratory of Urban Transport Emission ResearchCollege of Environmental Science and EngineeringNankai UniversityTianjin300350China CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research(CLAER) College of Environmental Science and EngineeringNankai UniversityTianjin300350China Department of Civil Environmentaland Construction EngineeringUniversity of Central FloridaOrlandoFLUSA School of Geography Earth and Environment Sciences University of BirminghamBirminghamB152TTUK State Key Laboratory of Precision Measuring Technology and Instruments Tianjin Key Laboratory of air Pollutants Monitoring TechnologySchool of Precision Instrument and Opto-electronics EngineeringTianjin UniversityTianjin300072China Gigantic Technology(Tianjin)Co. LtdTianjin300072China College of Computer Science Nankai UniversityTianjin300350China China National Environmental Monitoring Centre Beijing100012China

Particulate nitrate,a key component of fine particles,forms through the intricate gas-to-particle conversion *** process is regulated by the gas-to-particle conversion coefficient of nitrate(ε(NO_(3)^(-))).The mechanism betweenε(NO_(3)^(-))and its drivers is highly complex and nonlinear,and can be characterized by machine learning ***,conventional machine learning often yields results that lack clear physical meaning and may even contradict established physical/chemical mechanisms due to the influence of ambient *** urgently needs an alternative approach that possesses transparent physical interpretations and provides deeper insights into the impact ofε(NO_(3)^(-)).Here we introduce a supervised machine learning approachdthe multilevel nested random forest guided by theory *** approach robustly identifies NH4 t,SO_(4)^(2-),and temperature as pivotal drivers forε(NO_(3)^(-)).Notably,substantial disparities exist between the outcomes of traditional random forest analysis and the anticipated actual ***,our approach underscores the significance of NH4 t during both daytime(30%)and nighttime(40%)periods,while appropriately downplaying the influence of some less relevant drivers in comparison to conventional random forest *** research underscores the transformative potential of integrating domain knowledge with machine learning in atmospheric studies.

关键词： Machine learning Data driven Theoretical approach Domain knowledge Guide

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电池在线检测系统在海上石油平台上的应用

仪器仪表用户 2022年第4期29卷 45-48页

作者：唐怡陈鑫冯可梁杜银昌张天仪海洋石油工程股份有限公司天津300451

UPS不间断电源系统和导航系统是海洋石油平台重要的电气设备,而蓄电池又是UPS系统及导航系统的重要组成元件,在海洋石油平台持续供电中起到了至关重要的作用。为了避免因电池故障导致事故发生,并提升电池使用效能,阐述了海上石油平台采... 详细信息

UPS不间断电源系统和导航系统是海洋石油平台重要的电气设备,而蓄电池又是UPS系统及导航系统的重要组成元件,在海洋石油平台持续供电中起到了至关重要的作用。为了避免因电池故障导致事故发生,并提升电池使用效能,阐述了海上石油平台采用电池在线检测系统,对单体电池的电压、内阻及充放电电流等各项运行参数进行实时在线监测,通过上位机液晶显示器监测电池健康状态,对电池进行远程控制、检测、自我诊断、及时维修,延长电池使用寿命,并按需更换,从而大大提高了UPS和导航系统的供电可靠性。

关键词： UPS 导航蓄电池电池在线监测系统

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海上平台开关柜内红外测温系统应用分析

仪器仪表用户 2022年第11期29卷 31-33页

作者：蒋志鹏孟祥婷唐怡蔡连博杜银昌海洋石油工程股份有限公司天津300451

开关设备和控制设备简称开关柜,是保障海上平台电力系统稳定运行的主要设备之一,开关柜的安全检查和隐患排查是近年来关注的重点。随着平台服役时间增长,开关柜长期运行过程中可能伴随出现温度过高,进而引起过热、火灾、停电事故。因此... 详细信息

开关设备和控制设备简称开关柜,是保障海上平台电力系统稳定运行的主要设备之一,开关柜的安全检查和隐患排查是近年来关注的重点。随着平台服役时间增长,开关柜长期运行过程中可能伴随出现温度过高,进而引起过热、火灾、停电事故。因此,越早发现开关柜内部的发热问题,才能有效预防和杜绝此类事故的发生。在传统情况下,人们无法对开关柜直接测温。本文着重在海洋平台设计时,针对开关柜使用红外测温系统进行应用分析,实时在线监测开关柜母线室、电缆室温度并传输给上位机,对于故障及时响应、监测并记录开关柜内关键点的温度变化,大大提高了供电可靠性,保证用户长期、稳定、安全用电。

关键词：开关设备和控制设备红外测温在线监测

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海上制氢平台电力系统与电能管控技术研究

仪器仪表用户 2023年第12期30卷 5-8页

作者：蔡连博杜银昌张永革平洋王维高海洋石油工程股份有限公司天津300459

闸述了海上多能发电制氢无人平台供配电系统技术方案和电能管控技术方案的研究。研究制氢设备电力需求以及运行工况,对海上制氢平台的电力负荷进行计算和分析。结合风能、波浪能、潮流能等新能源发电特性,提出海上制氢平台电气系统架构... 详细信息

闸述了海上多能发电制氢无人平台供配电系统技术方案和电能管控技术方案的研究。研究制氢设备电力需求以及运行工况,对海上制氢平台的电力负荷进行计算和分析。结合风能、波浪能、潮流能等新能源发电特性,提出海上制氢平台电气系统架构和多能互补的电能管控技术方案。该系统结构和控制策略能够有效地利用各类发电装置电能,避免发电装置的频繁启停、无效启动,有效管控各类发电装置间以及与储能装置间电能的交叉应用和转换,提高电力系统的整体可靠性、稳定性。

关键词：海上制氢平台多能互补新能源发电无人平台

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