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An Identity Authentication Method Of Configuration Terminal Based On Audio Feature Recognition In Smart Distribution Network 智能配电网络中基于音频特征识别的配置终端身份验证方法
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012027
Hong Qiao, Kaiyi Wang, Yanbo Long, TanLong Huang, Xianyong Xu, Shuai Liu
A smart distribution network contains a large number of data acquisition terminals used to monitor the operation status of the distribution network and control the operation parameters, some of which are located in outdoor and other unsafe environments. If the attacker operates and configures the distribution network terminal by pretending to be a legitimate configuration device, it will become a springboard to infiltrate the main station of the internal network or misreport fault information, which may result in the leakage of sensitive data and even destroy the running state of the equipment. Identity authentication is the first line of defense to ensure the safe and stable operation of equipment. At present, the commonly used identity authentication technologies such as certificate authentication and key authentication have certain security vulnerabilities at different levels, which make it increasingly difficult to prevent the ever-changing network attack technology. According to the characteristics of physical unclonable facility (PUF), which is used to describe the hidden characteristics of the device and is directly related to the hardware, this paper proposes a method to authenticate the validity of the power distribution network configuration terminal based on the audio feature, which collects the frequency response characteristics of the hardware from the audio sensor of the configuration device as the identification information to identify the validity of the configuration device.
智能配电网中包含大量用于监测配电网运行状态和控制运行参数的数据采集终端,其中部分终端位于室外等不安全环境中。如果攻击者冒充合法配置设备对配网终端进行操作和配置,就会成为潜入内网主站或误报故障信息的跳板,可能导致敏感数据泄露,甚至破坏设备的运行状态。身份认证是确保设备安全稳定运行的第一道防线。目前,常用的证书认证、密钥认证等身份认证技术在不同层面都存在一定的安全漏洞,这使得日新月异的网络攻击技术越来越难以防范。本文根据物理不可克隆设施(PUF)用于描述设备的隐蔽特性,与硬件直接相关的特点,提出了一种基于音频特征的配电网配置终端有效性认证方法,从配置设备的音频传感器采集硬件的频响特征作为识别信息,识别配置设备的有效性。
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引用次数: 0
Application Research of Multi-Model Fusion Technology in Real-Time Prediction of Dispatch Order Operation Duration 多模型融合技术在调度令运行时长实时预测中的应用研究
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012025
ShouTian Zhang, Zhengning Pang, WeiLong Yan, JingXian Qi, Jian Yang, FuQuan Zhao
Power grid dispatching is a challenging task that requires dispatchers to be forward-looking in multiple aspects, with the operation of dispatch orders being one of its core tasks. Currently, the prediction of dispatch order duration relies mainly on the manual maintenance of experienced dispatchers, which is not only labor-intensive but also demands a high level of expertise. As a result, the effectiveness of existing systems in this regard is difficult to guarantee. However, due to the complexity of business scenarios, there has been no deployment of systems based on artificial intelligence algorithms. To address this issue, this paper employs multi-model fusion technology to achieve real-time prediction of dispatch order operation duration and has deployed it in Zhejiang Electric Power Company. The main contribution of this paper lies in proposing a strategy to solve the problem of regression prediction after differentiating feature fusion. Additionally, the paper provides a detailed description of how the relevant algorithms were deployed in Zhejiang Electric Power Company and presents the results of practical applications, demonstrating the effectiveness and practicality of the proposed solution.
电网调度是一项极具挑战性的工作,需要调度人员在多个方面具有前瞻性,其中调度命令的操作是其核心任务之一。目前,调度命令持续时间的预测主要依靠经验丰富的调度员人工维护,不仅劳动强度大,而且对专业技术水平要求高。因此,现有系统在这方面的有效性难以保证。然而,由于业务场景的复杂性,目前还没有部署基于人工智能算法的系统。针对这一问题,本文采用多模型融合技术实现了调度命令运行持续时间的实时预测,并在浙江省电力公司进行了部署。本文的主要贡献在于提出了一种解决差异化特征融合后回归预测问题的策略。此外,本文还详细介绍了相关算法在浙江省电力公司的部署情况,并展示了实际应用结果,证明了所提解决方案的有效性和实用性。
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引用次数: 0
Investigation of the mineralogical composition and origin analysis of black jadeite 黑翡翠的矿物成分调查和产地分析
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2790/1/012003
Fenghui Guo, Wei Xu, Minghui Tang, Ziqi Zhang, Zean Chen, Hao Lu
Analyzing black jadeite variety is helpful not only to distinguish black jadeite from the common omphacite jadeite, but also to learn the origin of jadeite by studying these special specimens. The basic gemological properties, mineral composition, structural characteristics, spectroscopic features, and color-causing mechanisms of black jadeite were studied through testing methods such as Polarizing microscope, X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy. Recent studies have confirmed the distinct crystalloblastic textures of black jadeite—namely columnar, granular, and fibrous—alongside its characteristic fracture structures. This research further identifies the presence of secondary minerals, primarily opaque black impurities consisting of a graphite and disordered graphite mixture, as revealed by Raman spectroscopy and X-ray diffraction analyses. These analyses have elucidated that the variable distribution of graphite mixtures contributes to differing degrees of light absorption, thereby forming various shades of black, a critical factor in the gemstone’s coloration. This study suggests that these carbonaceous materials are a byproduct of the carbonization of organic matter within metamorphic fluids, subsequently forming dispersed graphite structures within the mineral matrix and its fractures, indicative of multi-stage metamorphic processes. Additionally, the identification of graphite supports the theory that jadeite’s protolith originated from the subduction processes of the Neotethys Ocean, accompanied by metasomatism and high-pressure metamorphism of olivinite.
对黑翡翠品种进行分析,不仅有助于区分黑翡翠和常见的软玉,还可以通过研究这些特殊标本了解翡翠的起源。通过偏光显微镜、X 射线衍射、傅立叶变换红外光谱、拉曼光谱等测试方法,研究了黑翡翠的基本宝石学性质、矿物成分、结构特征、光谱特征和致色机理。最近的研究证实了黑翡翠独特的结晶质地,即柱状、颗粒状和纤维状,以及其特有的断裂结构。拉曼光谱和 X 射线衍射分析进一步确定了次生矿物的存在,主要是由石墨和无序石墨混合物组成的不透明黑色杂质。这些分析阐明,石墨混合物的不同分布导致不同程度的光吸收,从而形成各种深浅不同的黑色,这是宝石颜色的关键因素。這項研究顯示,這些碳質物質是變質流體內有機物碳化的副產品,隨後在礦物基質及其裂縫內形成分散的石墨結構,顯示多階段的變質過程。此外,石墨的鉴定支持了翡翠原石起源于新特提斯洋的俯冲过程,并伴随橄榄石的变质和高压变质过程的理论。
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引用次数: 0
Multichannel SiPM test readout system for gamma ray measurements with monolithic inorganic CeBr3 使用整体无机 CeBr3 进行伽马射线测量的多通道 SiPM 测试读出系统
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2794/1/012006
Veronika Asova, Galin Bistrev, V. Buchakchiev, V. Kozhuharov
Energy resolution and the detection efficiency for gamma quanta are fundamental properties in the construction of detectors for ionizing radiation. In this study, a SiPM-based photodetector coupled to a monolithic inorganic CeBr3 crystal is exposed to gamma rays in order to study the performance of the CeBr3 crystal. Measurements are made using three different radioactive sources - 137Cs, 22Na and 60Co. For each source, the measurements are made using a few different values for the Bias voltage of the SiPM. Furthermore, two CeBr3 crystals with different thicknesses are used in order to study how detector efficiency is affected by crystal dimensions. A preliminary analysis of the data is presented.
伽马量子的能量分辨率和探测效率是电离辐射探测器的基本特性。在这项研究中,为了研究 CeBr3 晶体的性能,将一个基于 SiPM 的光电探测器与一个整体式无机 CeBr3 晶体耦合,并将其暴露在伽马射线下。测量使用了三种不同的放射源--137Cs、22Na 和 60Co。对于每种放射源,都使用 SiPM 偏置电压的几个不同值进行测量。此外,还使用了两种不同厚度的 CeBr3 晶体,以研究晶体尺寸对探测器探测能力的影响。本文对数据进行了初步分析。
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引用次数: 0
On propagation of gradual and impulsive Coronal Mass Ejections (CMEs) 关于渐进式和脉冲式日冕物质抛射(CME)的传播
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2793/1/012009
N. Mohamad Ansor, Z. Hamidi, N. Shariff
Coronal Mass Ejection (CME) is a significant solar activity that releases magnetic field and plasma out of the corona and they are known as the main driver of space weather. In general, CMEs are characterized as gradual and impulsive based on their kinematic properties that include velocity and acceleration. This paper is aimed to analyze the differences in behaviour of gradual and impulsive CME based on recent events (dates) in solar cycle 25 and to justify their characterizations that have been demonstrated a while ago. Data analysis is conducted by studying the height-time, height-velocity and height-acceleration profiles for each event, based on SOHO LASCO Catalogue. Results show that impulsive CME travels a lot faster than gradual CME, with average velocity of 1239 km/s and 503.6 km/s respectively. It is believed that M6.7 flare accompanying the impulsive CME has been the main reason to high velocity due to its ability to contribute more heat energy and enhances the energy conversion during magnetic reconnection. Deceleration is observed in impulsive CME that is caused by the loss of momentum as interacting with the background solar wind and small-scale acceleration is manifested by gradual CME all through the propagation.
日冕物质抛射(CME)是一种从日冕释放磁场和等离子体的重大太阳活动,被称为空间天气的主要驱动力。一般来说,根据日冕物质抛射的运动特性(包括速度和加速度),可将其分为渐进式和脉冲式两种。本文旨在根据太阳周期 25 的近期事件(日期),分析渐进式和脉冲式 CME 在行为上的差异,并证明不久前已经证明的它们的特征。根据 SOHO LASCO 目录,通过研究每个事件的高度-时间、高度-速度和高度-加速度剖面进行了数据分析。结果表明,脉冲 CME 的速度比渐变 CME 快得多,平均速度分别为每秒 1239 千米和每秒 503.6 千米。据认为,伴随着脉冲 CME 的 M6.7 耀斑是造成高速的主要原因,因为它能够提供更多的热能,并在磁重联过程中加强能量转换。在脉冲 CME 中观察到的减速现象是由于与背景太阳风相互作用而失去动量造成的,而小范围的加速则表现为 CME 在整个传播过程中的逐渐加速。
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引用次数: 0
Voltage Compensation Method for Multi-feeder Distribution Networks Based on a UPQC with PV Injection 基于光伏注入式 UPQC 的多馈线配电网络电压补偿方法
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012019
Xielin Shen, Bo Yuan, Weiwen Peng, Hua Ye, Tiantian Dong
In response to the problem of prolonged low voltage at the end of distribution grids, a voltage compensation method for multi-feeder distribution networks based on a unified power quality controller (UPQC) with PV injection is proposed in this paper. In the proposed scheme, two series inverters, a single parallel rectifier and photovoltaic (PV) system are flexibly interconnected via DC bus. The voltage attenuation can be compensated by the two series inverter, and the parallel rectifier is capable of supplying energy to the DC side of the two series inverters on adjacent AC feeders. Meanwhile, active power can also be supplied by the PV panel through a DC/DC converter. The operation modes and control strategies of the proposed method are analyzed in-depth. Finally, a MATLAB/Simulink model is shown to verify the effectiveness of the method proposed in this paper.
针对配电网末端长期低电压的问题,本文提出了一种基于光伏注入的统一电能质量控制器(UPQC)的多馈线配电网电压补偿方法。在所提出的方案中,两个串联逆变器、一个并联整流器和光伏(PV)系统通过直流母线灵活互连。两个串联逆变器可补偿电压衰减,并联整流器可向相邻交流馈线上两个串联逆变器的直流侧供电。同时,光伏电池板还可通过 DC/DC 转换器提供有功功率。深入分析了所提方法的运行模式和控制策略。最后,通过 MATLAB/Simulink 模型验证了本文所提方法的有效性。
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引用次数: 0
Study on Breakdown Characteristics and Attenuation Characteristics of Air Mixed Gas 空气混合气体的击穿特性和衰减特性研究
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012092
SiNan Yu, Xin Lin, Bo Zhang, YanZhe Zhao
Nowadays, the global demand for environmental protection and energy saving is getting higher and higher. In the past, SF6 gas was regarded as an environmentally unfriendly gas in the circuit breaker with SF6 gas as the insulating medium. In order to save energy and reduce emissions, this paper uses clean and environmentally friendly air as the arc extinguishing medium. The gas mixture studied contains N2, O2 and CO2. Through two approximate values of Boltzmann equation, we obtain the electron energy distribution function of air mixed gas under different electric field reduction conditions. By studying the changes of ionization and adsorption coefficients of particles under various collision conditions, we obtained the conversion breakdown field strength (E/N) Cr of air mixture. An arc attenuation model is built to characterize the arc attenuation characteristics using the prior transport characteristics as input. The arc attenuation process is broken down into three steps: heat recovery, pre-ignition, and arcing. All of these phases are determined by the changes in axial temperature and arc conductance over time. Analysis is done on the air and nitrogen thermal recovery and pre-dielectric recovery phases. This study explores the use of clean dielectrics to ensure optimum performance of primary equipment in the power system, based on current circumstances.
如今,全球对环保和节能的要求越来越高。过去,在以 SF6 气体为绝缘介质的断路器中,SF6 气体被认为是一种不环保的气体。为了节能减排,本文采用清洁环保的空气作为灭弧介质。所研究的混合气体包含 N2、O2 和 CO2。通过波尔兹曼方程的两个近似值,我们得到了不同电场还原条件下空气混合气体的电子能量分布函数。通过研究不同碰撞条件下粒子的电离系数和吸附系数的变化,我们得到了空气混合物的转换击穿场强(E/N)Cr。我们建立了一个电弧衰减模型,利用先前的传输特性作为输入来描述电弧衰减特性。电弧衰减过程分为三个步骤:热回收、预点火和起弧。所有这些阶段都取决于轴向温度和电弧传导随时间的变化。对空气和氮气热恢复阶段以及介电前恢复阶段进行了分析。本研究根据当前情况,探讨了如何使用清洁电介质来确保电力系统中一次设备的最佳性能。
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引用次数: 0
LQR controller design for portable power supply based on flyback converter 基于反激式转换器的便携式电源 LQR 控制器设计
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2797/1/012030
Bing Zou, Dehui He, Jianan Liang
The stability of the power repair equipment guarantees the reliability of the repair of electrical equipment. The following problems exist in the power supply of the emergency equipment: the load equipment randomly cuts in the power supply network; load equipment requires fast dynamic performance of the power supply. This challenges the stability of the portable power supply with the Flyback converter as the core. In this paper, an optimal feedback control strategy based on linear quadratic regulator (LQR) theory is proposed to improve the dynamic and steady-state performance of the Flyback converter. First, the state-averaged space model of the Flyback is derived and established. Second, an output voltage feedback integral controller is introduced to eliminate the steady-state error of the output voltage. Next, according to the LQR optimal control theory, the control model of the Flyback converter has been established, and the parameter design of the controller has been carried out by obtaining the optimal feedback gain matrix of the system. Finally, the simulation models are implemented with an output power of 120 W and a switching frequency of 50 kHz. The simulation results prove that the LQR controller provides superior performance than the traditional PI controller.
电力维修设备的稳定性保证了电力设备维修的可靠性。应急设备的供电存在以下问题:负载设备随意切断供电网络;负载设备要求电源具有快速的动态性能。这对以反激式转换器为核心的便携式电源的稳定性提出了挑战。本文提出了一种基于线性二次调节器(LQR)理论的优化反馈控制策略,以改善反激式转换器的动态和稳态性能。首先,推导并建立了反激式转换器的状态平均空间模型。其次,引入输出电压反馈积分控制器来消除输出电压的稳态误差。接着,根据 LQR 最佳控制理论,建立了反激式转换器的控制模型,并通过获得系统的最佳反馈增益矩阵来进行控制器的参数设计。最后,在输出功率为 120 W、开关频率为 50 kHz 的条件下实现了仿真模型。仿真结果证明,LQR 控制器的性能优于传统的 PI 控制器。
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引用次数: 0
Grid-connected New Energy Generation and its Influence on Power Supply Quality based on Smart Grid 基于智能电网的并网新能源发电及其对供电质量的影响
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2795/1/012005
Canhao Zhou, Xiuqi Lin, Chunquan Fu
With the large-scale access of NE(new energy) sources, the PS(power system) has presented a new pattern of multi-source coordinated and complementary PG(power generation), but the existing capacity benefit and absorptive capacity evaluation methods have not considered the impact of the coordinated operation of wind, solar, water and fire power sources on the time series load curve, and there is also a lack of a NE grid-connected capacity benefit and absorptive capacity evaluation method that can take into account the generation output characteristics of various types of power sources and multi-energy complementary characteristics. This paper analyzes the problems existing in traditional research, and analyzes the impact of NEG(new energy generation) on power supply quality based on smart grid. In addition, the capacity benefit and absorptive capacity evaluation methods of large-scale NE grid-connected are deeply studied in this paper, and some innovative research results have been obtained. Therefore, the method proposed in this paper can be used to promote smart grid to have a positive impact on power supply quality.
随着 NE(新能源)的大规模接入,PS(电力系统)呈现出多源协调互补的 PG(发电)新格局,但现有的容量效益和消纳能力评价方法尚未考虑风、光、水、火等电源协调运行对时序负荷曲线的影响,也缺乏一种能够兼顾各类电源发电出力特性和多能互补特性的 NE 并网容量效益和消纳能力评价方法。本文分析了传统研究中存在的问题,并基于智能电网分析了 NEG(新能源发电)对供电质量的影响。此外,本文还深入研究了大规模 NE 并网的容量效益和消纳能力评价方法,并取得了一些创新性的研究成果。因此,本文提出的方法可用于促进智能电网对供电质量产生积极影响。
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引用次数: 0
Research on the Application of Cloud Edge Collaboration Architecture in Power System 云边缘协作架构在电力系统中的应用研究
Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2795/1/012022
Xin Liu, Yijun Zhong, Cheng Bi, Feng Jiao, Jun Xu
With the increasing demand for electricity and the wide use of renewable energy, the power system is facing higher complexity and challenges. In order to meet these challenges, cloud-side collaborative architecture has become an innovative solution with great potential. Firstly, this paper discusses the basic concept of cloud-side collaborative architecture, which integrates cloud computing, edge computing and terminal devices to achieve more efficient data processing and analysis. This architecture provides real-time data collection and monitoring capability for power system, which is helpful to realize better monitoring and optimization of power system operation state. Secondly, this paper discusses the application fields of cloud-side collaborative architecture in power system in detail, including energy data collection and monitoring, smart grid management, predictive maintenance and security and privacy protection, and emphasizes the importance of cloud-side collaborative architecture in power system modernization. Cloud-edge collaborative architecture provides new opportunities and solutions for the intelligence, sustainability and security of power systems, but it also needs to overcome some technical and security challenges.
随着电力需求的不断增长和可再生能源的广泛使用,电力系统正面临着更高的复杂性和挑战。为了应对这些挑战,云端协同架构已成为一种极具潜力的创新解决方案。首先,本文讨论了云端协同架构的基本概念,即整合云计算、边缘计算和终端设备,实现更高效的数据处理和分析。该架构为电力系统提供了实时数据采集和监控能力,有助于更好地监控和优化电力系统的运行状态。其次,本文详细论述了云边协同架构在电力系统中的应用领域,包括能源数据采集与监测、智能电网管理、预测性维护和安全隐私保护等,并强调了云边协同架构在电力系统现代化中的重要性。云边协同架构为电力系统的智能化、可持续性和安全性提供了新的机遇和解决方案,但也需要克服一些技术和安全挑战。
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引用次数: 0
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