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Research on three-dimensional dynamic design and decision system of airport 机场三维动态设计与决策系统研究
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2791/1/012058
Peng Shen, Yan Zhang
Due to the lack of elevation information, the traditional airport design system based on the AutoCAD 2D platform is often unable to make a comprehensive and objective analysis and judgment when the designer evaluates the advantages and disadvantages of the design scheme. Therefore, this paper focuses on the development of airport 3D dynamic design and decision systems based on the Cesium framework. Firstly, based on the 3D geographic information platform, a multi-type 3D digital map loading and display module will be developed to realize the combination of 3D geographic information and the airfield model. Then, according to the 3D model data and the characteristics of the platform development, the method of calculating the earth volume of clearance processing, the evaluation algorithm of airport clearance obstacle limit surface, the optimization analysis method of tower position, and the analysis method of navigation station and flight track visibility are constructed.
传统的基于 AutoCAD 2D 平台的机场设计系统,由于缺乏高程信息,设计人员在评价设计方案优劣时,往往无法进行全面客观的分析和判断。因此,本文重点研究基于铯框架的机场三维动态设计与决策系统的开发。首先,基于三维地理信息平台,开发多类型三维数字地图加载与显示模块,实现三维地理信息与机场模型的结合。然后,根据三维模型数据和平台开发特点,构建净空处理土方量计算方法、机场净空障碍物限制面评价算法、塔台位置优化分析方法、导航台和航迹能见度分析方法等。
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引用次数: 0
Research and Simulation of Partial Discharge Phenomenon Sensing Technology for Substation Inspection Robots 变电站巡检机器人的局部放电现象传感技术研究与仿真
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012033
Hongxi Yu, Liang Xu, Lu Yang, Dongqi Li, Ke Xu, Li Li
This paper thoroughly investigates the phenomenon of partial discharge in substations and proposes a set of simulation experimental apparatus to replicate various types of partial discharge defects in switchgear. By modifying the switchgear, incorporating models for different types of partial discharge, and equipping various standard partial discharge sensors, accurate simulations of phenomena such as point discharge, suspended discharge, gap discharge, and particle discharge are achieved. Through this system, the effectiveness of different detection methods, such as ultrasonic, high-frequency, and transient voltage methods, is validated for various defect models. Furthermore, utilizing an indoor inspection robot guide rail, the paper simulates the environment of partial discharge in substations, enabling the validation of the robot’s partial discharge detection performance and typical patterns under different conditions. This work is dedicated to providing situational awareness technology for partial discharge phenomenon detection for substation inspection robots, so that the inspection robot can detect various abnormal partial discharge phenomena in transformers or other substation equipment through micro sensors to promote the stable operation of the substation.
本文深入研究了变电站中的局部放电现象,并提出了一套模拟实验装置来复制开关设备中的各类局部放电缺陷。通过对开关设备进行改造,加入不同类型的局部放电模型,并配备各种标准的局部放电传感器,实现了对点放电、悬浮放电、间隙放电和颗粒放电等现象的精确模拟。通过该系统,针对各种缺陷模型,验证了超声波、高频和瞬态电压等不同检测方法的有效性。此外,本文还利用室内检测机器人导轨,模拟了变电站局部放电的环境,从而验证了机器人在不同条件下的局部放电检测性能和典型模式。这项工作致力于为变电站巡检机器人提供局部放电现象检测的态势感知技术,使巡检机器人能够通过微型传感器检测变压器或其他变电站设备的各种异常局部放电现象,从而促进变电站的稳定运行。
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引用次数: 0
Research on Intelligent Heating for Urban Systems Based on Digital Twin 基于数字孪生的城市系统智能供暖研究
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2806/1/012003
Gao Jing, Zhongxiao Du, Shuxiang Yang, Yingqi Xu, Xu Sibo
This article focuses on the intelligent heating platform driven by digital twins, analyzing the overall framework of the system according to the sensor layer, application layer, and network layer, and building an information service platform for intelligent heating networks. The data of the entire heating system, including heat sources, primary networks, heating stations, secondary networks, and heat users, is remotely collected, analyzed, and diagnosed. Subsequently, statistical analysis is conducted on the energy consumption of each heat source and heating station, achieving data sharing and data mining among various business systems. This article conducts research on several key technologies for optimizing decision-making methods of heating system operation scheduling based on simulation models and develops software systems to support the intelligent upgrading of heating systems. The results show that intelligent heating system based on digital twins can better meet the balance between supply and demand in urban heating systems, and optimize the overall operating costs and environmental benefits of the system under multiple constraints.
本文以数字孪生驱动的智能供热平台为研究对象,按照传感器层、应用层、网络层分析了系统的整体框架,构建了智能供热网络信息服务平台。对热源、一次网、供热站、二次网、热用户等整个供热系统的数据进行远程采集、分析和诊断。随后,对各热源和供热站的能耗进行统计分析,实现各业务系统间的数据共享和数据挖掘。本文对基于仿真模型的供热系统运行调度优化决策方法的几项关键技术进行了研究,并开发了支持供热系统智能化升级的软件系统。研究结果表明,基于数字双胞胎的智能供热系统能更好地满足城市供热系统的供需平衡,并在多重约束条件下优化系统的整体运行成本和环境效益。
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引用次数: 0
A Low-carbon Dispatching Method for Cascade Hydropower via HVDC Flexible Delivery 通过高压直流灵活输送实现梯级水电的低碳调度方法
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012085
Yutong Wang, Chenyong Zhao, Heping Jia
As a country rich in hydropower resources, the transmission of Southwest hydropower through HVDC system can achieve a large range of optimal allocation of resources, but the traditional HVDC transmission plan is often operated in high and low binary value, which is difficult to give full play to the flexibility of HVDC transmission, and increase the carbon emission and operation cost of the power system. In order to fully explore the flexibility of HVDC transmission mode to reduce system carbon emissions, this paper builds a mixed integer programming model based on the scenario of hydropower being sent to the receiving system through the HVDC system, taking into account such factors as low operating costs and carbon dioxide emissions of thermal power units at the receiving end, overload capacity of the HVDC system, and reactive power compensation cost of the HVDC system. A low carbon scheduling method for cascade hydropower HVDC flexible delivery system is proposed. Finally, taking the cross-regional transmission system of cascade hydropower station as an example, the model proposed in this paper is compared with the high-low binary transmission of traditional HVDC system. The results show that the dispatch mode proposed in this paper and the flexible operation of the HVDC system can promote the consumption of new energy, reduce the CO2 emissions of the system and achieve the dispatch goal of both low carbon and economic operation.
我国是水电资源丰富的国家,通过高压直流系统输送西南水电可以实现大范围的资源优化配置,但传统的高压直流输电方案往往以高低二值运行,难以充分发挥高压直流输电的灵活性,增加了电力系统的碳排放和运行成本。为充分挖掘高压直流输电方式的灵活性,降低系统碳排放,本文基于水电通过高压直流系统送往受端系统的场景,综合考虑受端火电机组低运行成本和二氧化碳排放、高压直流系统过载能力、高压直流系统无功补偿成本等因素,建立了混合整数编程模型。提出了一种梯级水电高压直流柔性输送系统的低碳调度方法。最后,以梯级水电站跨区输电系统为例,将本文提出的模型与传统 HVDC 系统的高低二元输电进行了比较。结果表明,本文提出的调度模式和高压直流系统的灵活运行可以促进新能源的消纳,减少系统的二氧化碳排放,实现低碳和经济运行并重的调度目标。
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引用次数: 0
Research on the temperature control of a cryogenic urine storage system based on improved adaptive LADRC 基于改进型自适应 LADRC 的低温尿液储存系统温度控制研究
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2806/1/012023
Changjian Zhu, Yu Jiang, Donghua Shen, Youpeng Zhao
Routine urine tests play a vital role in the diagnosis of kidney and urinary system diseases, with test outcomes directly affecting disease diagnosis. However, if urine is exposed to room temperature for extended periods, it may lead to rapid degradation of the sample, thus affecting the accuracy of the test. Therefore, for urine that requires long-term storage for testing, it is necessary to control the temperature within an appropriate range during the collection process to effectively preserve the activity of urinary proteins and ensure the reliability of the test. To address this issue, a cryogenic urine storage system was developed, and a fuzzy LADRC temperature control algorithm combined with a Smith predictor was proposed, specifically designed for optimizing the temperature stability during urine collection and storage processes. Initially, the characteristics of the cryogenic storage system were analyzed. A simulation model combining the fuzzy LADRC with a Smith predictor was built using the MATLAB/Simulink simulation toolkit, and a comparative simulation was conducted. The simulation results showed that the proposed algorithm significantly improved the time-domain response performance compared to PID control, verifying the superiority of the algorithm over PID control. The final experimental results demonstrated that the fuzzy LADRC temperature control algorithm with the Smith predictor essentially eliminated overshoot, with improvements in speed and stability compared to PID control.
尿液常规检测在诊断肾脏和泌尿系统疾病方面发挥着重要作用,检测结果直接影响疾病诊断。然而,如果尿液长期暴露在室温下,可能会导致样本迅速降解,从而影响检验的准确性。因此,对于需要长期储存检测的尿液,有必要在采集过程中将温度控制在适当的范围内,以有效保存尿蛋白的活性,确保检测的可靠性。针对这一问题,我们开发了一种低温尿液储存系统,并提出了一种结合史密斯预测器的模糊 LADRC 温度控制算法,专门用于优化尿液采集和储存过程中的温度稳定性。首先,对低温储存系统的特性进行了分析。使用 MATLAB/Simulink 仿真工具包建立了模糊 LADRC 与 Smith 预测器相结合的仿真模型,并进行了对比仿真。仿真结果表明,与 PID 控制相比,所提出的算法显著改善了时域响应性能,验证了该算法优于 PID 控制。最终的实验结果表明,与 PID 控制相比,采用 Smith 预测器的模糊 LADRC 温度控制算法基本上消除了超调,并提高了速度和稳定性。
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引用次数: 0
Design of bifunctional composite bone age prediction network based on Swin-Transformer 基于斯温变换器的双功能复合骨龄预测网络设计
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2806/1/012021
Zhiling Qian, Yuan Yuhao
Bone age can be predicted by taking hand X-rays. Prediction of bone age is a labor-intensive and time-consuming radiological clinical task. This paper combined a series of prevailing deep learning methods to address this problem. Stages1~3 of Swin Transformer served as backbone, with the multi-scale neck network and detection head of Yolox connected to it. These formed the first period’s hand bone joints detector. After finishing detector training, the pre-trained Stages1~3 were frozen for the second period’s developmental grades classification of corresponding bone joint. Additionally, a linear classification head was attached to Swin Transformer’s stage4, where it functioned as second period’s classifier for different developmental grades. Therefore, a dual-purpose composite network was created like this. It made the bone age prediction model have high integrated level, and the two periods could be applied fusion training. In addition, different attention mechanisms were introduced at different positions, loss functions and optimization methods were also redesigned to ensure improvement of network performance. In the hand bone joints detection period, compared to the original Yolox-X, there was a 5.27% increase in Ap@50 and a 40.12% increase in Ap@50:95. As for the developmental grade classification period, the validation accuracy surpassed that of EfficientNetV2-L by 5.18%, with one-third the training size.
通过拍摄手部 X 光片可以预测骨龄。骨龄预测是一项耗时耗力的放射临床工作。本文结合了一系列流行的深度学习方法来解决这一问题。以 Swin Transformer 的第 1~3 阶段为骨干,连接 Yolox 的多尺度颈部网络和检测头。这些构成了第一阶段的手部骨骼关节检测器。检测器训练完成后,预训练阶段 1~3 被冻结,用于第二阶段相应骨关节的发育等级分类。此外,还在 Swin Transformer 的阶段 4 上安装了一个线性分类头,作为第二阶段不同发育等级的分类器。这样,一个两用复合网络就建立起来了。这使得骨龄预测模型具有较高的综合水平,并且两个时期可以进行融合训练。此外,还在不同位置引入了不同的注意机制,并重新设计了损失函数和优化方法,以确保网络性能的提高。在手骨关节检测阶段,与原来的 Yolox-X 相比,Ap@50 提高了 5.27%,Ap@50:95 提高了 40.12%。在发育等级分类阶段,验证精度比 EfficientNetV2-L 提高了 5.18%,而训练量仅为 EfficientNetV2-L 的三分之一。
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引用次数: 0
Multi-objective optimal design for the railway bogie frame system under stress and fatigue analysis 应力和疲劳分析下的铁路转向架构架系统多目标优化设计
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2793/1/012010
C. Lee, Chien-Kuan Liu, Y. Cheng
This work focuses on applying a novel and integrated multi-objective optimization approach to enhance the strength of the railway bogie frame system under both static loads and fatigue tests. The finite element modelling is conducted using ANSYS/Workbench software, and the von Mises stress and fatigue safety factor of the bogie frame are computed through conventional simulations for EN 13749 and EN 15663 testing. After employing the uniform design method, the fatigue safety factor is increased from 1.924 to 2.586, resulting in a 34.41% improvement rate for the bogie frame. Additionally, the von Mises stress is reduced from 56.96 MPa to 42.91 MPa, reflecting a 24.66% improvement rate compared to the original design. Following the implementation of the multi-objective optimum design process, the fatigue safety factor further improves from 1.924 to 2.742, resulting in a 42.51% enhancement for the bogie frame. Simultaneously, the von Mises stress decreases from 56.96 MPa to 40.48 MPa, yielding an improvement rate of 28.92%.
这项工作的重点是应用一种新颖的综合多目标优化方法,以提高铁路转向架构架系统在静载荷和疲劳试验下的强度。使用 ANSYS/Workbench 软件进行了有限元建模,并通过 EN 13749 和 EN 15663 测试的常规模拟计算了转向架构架的 von Mises 应力和疲劳安全系数。采用统一设计方法后,疲劳安全系数从 1.924 提高到 2.586,使转向架构架的疲劳安全系数提高了 34.41%。此外,von Mises 应力从 56.96 兆帕减小到 42.91 兆帕,与原始设计相比提高了 24.66%。实施多目标优化设计流程后,疲劳安全系数从 1.924 进一步提高到 2.742,使转向架构架的疲劳安全系数提高了 42.51%。同时,冯米塞斯应力从 56.96 兆帕降至 40.48 兆帕,提高了 28.92%。
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引用次数: 0
Quality Assessment Method for Insulator Sample Bank Based on Sampling Theory 基于抽样理论的绝缘子样品库质量评估方法
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012057
Jie Wei, Xing He, Zhihan Yi, Xizhe Li, Rui Song, Jian Chen
Insulator strings are important components in power systems to support and isolate transmission lines. Due to long-term exposure to the natural environment, insulator strings are susceptible to damage, such as self-explosion, broken umbrella skirts, and galvanic corrosion, which is one of the most common failures. Once damaged, it can lead to widespread power outage, which affects people’s life and industrial production, so it is necessary to inspect and replace the damaged insulator strings regularly. This thesis proposes a quadratic sampling based approach to assess the quality of insulator string sample banks. Through simple random sampling, estimation and interval estimation of the sample pool, the pass rate and average number of labels of the original sample pool are initially assessed and compared with the usage requirements to decide whether to carry out a second sampling or not; the second sampling used SADS as an evaluation metric to assess the performance of the insulator string sample bank.
绝缘子串是电力系统中支撑和隔离输电线路的重要部件。由于长期暴露在自然环境中,绝缘子串很容易损坏,如自爆、伞裙破损、电化学腐蚀等,这也是最常见的故障之一。一旦损坏,会导致大面积停电,影响人们的生活和工业生产,因此有必要定期检查和更换损坏的绝缘子串。本论文提出了一种基于二次抽样的方法来评估绝缘子串样本库的质量。通过对样本库进行简单随机抽样、估计和区间估计,初步评估原样本库的合格率和平均标签数,并与使用要求进行比较,决定是否进行二次抽样;二次抽样以 SADS 作为评价指标,评估绝缘子串样本库的性能。
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引用次数: 0
Integration of Smart Grid and Application of Microgrid Technologies in Western Pipeline Company 西部管道公司集成智能电网和应用微电网技术
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2795/1/012009
Pengcheng Duan
The energy sector is undergoing a significant transformation, driven by the urgent need to address climate change, enhance energy security, and cater to the growing demand for electricity. In the context of escalating global energy demands and environmental concerns, this study investigates the integration and application of smart grid and microgrid technologies within the Western Pipeline Company’s operations. Addressing the critical need for sustainable energy solutions, our research focuses on enhancing system efficiency, reliability, and user satisfaction while reducing environmental impacts. Our findings reveal significant improvements in peak load reduction (15.3%), total energy reduction (20.46%), and carbon emission reduction (30.01%) compared to conventional methods. Moreover, the study demonstrates a marked increase in system reliability (95.35%) and a substantial decrease in response times (2.6 seconds), highlighting the efficiency of our integrated energy management strategies. The research also underscores notable advancements in customer satisfaction (90.13%), maintenance cost reduction (50.4%), and renewable energy utilization (75.80%), affirming the effectiveness and economic viability of implementing advanced grid technologies.
由于迫切需要应对气候变化、加强能源安全和满足日益增长的电力需求,能源行业正在经历一场重大变革。在全球能源需求和环境问题不断升级的背景下,本研究调查了智能电网和微电网技术在西部管道公司运营中的集成和应用。为了满足对可持续能源解决方案的迫切需求,我们的研究侧重于提高系统效率、可靠性和用户满意度,同时减少对环境的影响。我们的研究结果表明,与传统方法相比,峰值负荷降低率(15.3%)、总能耗降低率(20.46%)和碳排放量降低率(30.01%)均有明显改善。此外,研究还表明,系统可靠性显著提高(95.35%),响应时间大幅缩短(2.6 秒),突出了我们的综合能源管理策略的效率。研究还强调了在客户满意度(90.13%)、维护成本降低(50.4%)和可再生能源利用率(75.80%)方面的显著进步,肯定了实施先进电网技术的有效性和经济可行性。
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引用次数: 0
State of Power Estimation Method for Hybrid Capacitor Battery Based on PSO Algorithm 基于 PSO 算法的混合电容电池功率状态估算方法
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012047
Yilong Guo, Siwen Chen, Shiyou Xing, Jinlei Sun, Shiyan Pan
Hybrid Capacitive Battery (HCB) is an emerging electrochemical energy storage device that holds immense potential in the application of future energy storage systems (ESSs). When the ESS composed of HCBs is controlled and scheduled, it is necessary to understand its ability to release or absorb power. Therefore, accurate power prediction of batteries is crucial. This paper introduces a method for estimating the state of power (SOP) in HCB using the particle swarm optimization (PSO) algorithm. The method mainly consists of three parts: first, an equivalent circuit model (ECM) is employed to accurately represent the HCB, then an H-∞ filter algorithm is used to estimate its state of energy (SOE). In the third step, an optimization objective function is established based on the HCB model to describe the terminal voltage changes during its charging and discharging process, and use PSO algorithm to solve and obtain the estimated SOP results. Finally, the reference values of the SOP were obtained through constant power pulse testing experiments, proving that this method can effectively predict SOP under constant power conditions.
混合电容电池(HCB)是一种新兴的电化学储能装置,在未来储能系统(ESS)的应用中具有巨大潜力。在对由 HCB 组成的 ESS 进行控制和调度时,有必要了解其释放或吸收电能的能力。因此,准确预测电池的功率至关重要。本文介绍了一种利用粒子群优化(PSO)算法估算 HCB 电量状态(SOP)的方法。该方法主要由三部分组成:首先,采用等效电路模型(ECM)准确表示 HCB,然后采用 H-∞ 滤波算法估计其能量状态(SOE)。第三步,根据 HCB 模型建立优化目标函数,以描述其充电和放电过程中的端电压变化,并使用 PSO 算法求解并获得估计的 SOP 结果。最后,通过恒功率脉冲测试实验获得了 SOP 的参考值,证明该方法能有效预测恒功率条件下的 SOP。
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引用次数: 0
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Journal of Physics: Conference Series
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