Architecture design and demand analysis on application layer of standard system for ubiquitous power Internet of Things

The ubiquitous power Internet of Things(UPIoT)is an intelligent service system with comprehensive state perception,efficient processing,and flexible application of information.It focuses on each link of the power system and makes full use of the mobile internet,artificial intelligence,and other advanced information and communication technologies in order to realize the inter-human interaction of all things in all links of the power system.This article systematically presents to the national and international organizations and agencies in charge of UPIoT layer standardization the status quo of the research on the Internet of Things(IoT)-related industry standards system.It briefly describes the generic standard classification methods,layered architecture,conceptual model,and system tables in the UPIoT application layer.Based on the principles of inheritance,innovation,and practicability,this study divides the application layer into customer service,power grid operation,integrated energy,and enterprise operation,emerging business and analyzes the standard requirements of these five fields.This study also proposes a standard plan.Finally,it summarizes the research report and provides suggestions for a follow-up work.

Analysis of the Design and Application of a Novel CT Secondary Cable Line Calibrator

With the rapid development of electrical power systems,ensuring the accuracy and reliability of power transmis-sion has become particularly crucial.The secondary cable line calibrator for current transformers(CT)plays an essential role in calibrating electrical power systems.It is not only related to the safe operation of the system but also directly im-pacts the accuracy of energy metering.This study aims to design and analyze an efficient CT secondary cable line calibra-tor to explore its application effects in the power system.By thoroughly analyzing the characteristics of CT secondary ca-ble lines and the design requirements of the calibrator,this paper proposes an innovative design scheme for the calibrator.This device demonstrates significant effects in enhancing the accuracy and stability of power system calibration,providing robust technical support for the optimization and upgrade of the power system.This research not only offers a theoretical basis and practical guidance for the design and application of CT secondary cable line calibrators but also contributes new ideas and methods for the precise calibration and efficient management of the power system.

Optimal and Robust Power System Stabilizers in a Multi Machine System

One method for eliminating oscillations in power systems is using stabilizers.By applying an appropriate control signal in the excitation system of a generator,a power system stabilizer improves the dynamic stability of power systems.However,the issue that is of high importance is the correct design of these stabilizers.These stabilizers must be designed to have proper performance when operating conditions change.When designed incorrectly,not only they do not improve the stability margin,but also increase the oscillations.In this paper,the robust design of power system stabilizers on a four-machine power system has been performed.For this purpose,the differential evolution algorithm has been used.The studies have been repeated as three scenarios by producing different loading conditions for the generators.The performances of the conventional stabilizer and the optimized one have been compared.Simulation results indicate that the designed robust stabilizer outperforms other stabilizers in different conditions and has damped the interarea and intra-area oscillation modes in the shortest time with minimum amplitude.

Improving power system dynamic performance using attuned design of dual-input PSS and UPFC PSD controller

The objective of this work is the coordinated design of controllers that can enhance damping of power system swings. With presence of flexible AC transmission system （FACTS） device as unified power flow controller （UPFC）, three specific classes of the power system stabilizers （PSSs） have been investigated. The first one is a conventional power system stabilizer （CPSS）; the second one is a dual-input power system stabilizer （dual-input PSS）; and the third one is an accelerating power PSS model （PSS2B）. Dual-input PSS and PSS2B are introduced to maintain the robustness of control performance in a wide range of swing frequency. Uncoordinated PSS and UPFC damping controller may cause unwanted interactions; therefore, the simultaneous coordinated tuning of the controller parameters is needed. The problem of coordi- nated design is formulated as an optimization problem, and particle swarm optimization （PSO） algorithm is employed to search for optimal parameters of controllers. Finally, in a system having a UPFC, comparative analysis of the results obtained from application of the dual-input PSS, PSS2B, and CPSS is presented. The eigenvalue analysis and the time-domain simulation results show that the dual-input PSS ＆ UPFC and the PSS2B ＆ UPFC coordination provide a better performance than the conventional single-input PSS ＆ UPFC coordination. Also, the PSS2B ＆ UPFC coordination has the best performance.

Reliability and sensitivity analysis of loop-designed security and stability control system in interconnected power systems

Security and stability control system(SSCS)in power systems involves collecting information and sending the decision from/to control stations at different layers;the tree structure of the SSCS requires more levels.Failure of a station or channel can cause all the execution stations(EXs)to be out of control.The randomness of the controllable capacity of the EXs increases the difficulty of the reliability evaluation of the SSCS.In this study,the loop designed SSCS and reliability analysis are examined for the interconnected systems.The uncertainty analysis of the controllable capacity based on the evidence theory for the SSCS is proposed.The bidirectional and loop channels are introduced to reduce the layers and stations of the existing SSCS with tree configuration.The reliability evaluation and sensitivity analysis are proposed to quantify the controllability and vulnerable components for the SSCS in different configurations.By aiming at the randomness of the controllable capacity of the EXs,the uncertainty analysis of the controllable capacity of the SSCS based on the evidence theory is proposed to quantify the probability of the SSCS for balancing the active power deficiency of the grid.

Design and Simulation of a Electrorheological(ER) Control High Voltage Power Supply

Few applications with electrorheological （ER） fluids have been found in industry. One reason is high voltage power supplies cannot meet the requirement for ER effect. In this paper, an ER control high voltage power supply for engineering application was designed which reduced power wastage by adopting soft switch technology; lessened its volume to satisfy micromation when adopting the planar transformer and improved its response character- istic by choosing an assistant discharging circuit. Simultaneously, a simulation analysis has been carried out. As results, the output voltage of this high voltage power supply is 5 kV, and the voltage can be continuously regulated and the voltage ripple is only 0. 7 %, so the requirement of stability is also achieved.

Parametric Study on a Caisson Based OWC Wave Energy Converting System

This study uses a numerical method to analyze the proposed model structure. Before the parametric analysis, a pre-analysis to make sure the analytical results are accountable, a verification analysis was performed. The results found are compared well with the limited experimental findings of Goda et al. and it is very encouraging to find that for the proposed method as an alternative for green energy developments, as long as an appropriate design is performed, an OWC combined with breakwater structure may provide an alternative for green energy system utilized in a harbor area. From the results of the first stage of parameter analysis that the size of the openings of the cell of converting system is variable, a traditional full opened cell is not necessary the most efficient design for the wave power conversion in terms of the variations of air pressure inside the cell and air speed through the outlet orifice that will drive the electricity power generator.

光伏电子工程技能大赛项目设计与实施

针对光伏电子工程技能大赛项目设备有限,不能很好满足区赛比赛需求的问题,设计一种基于XK-FTD3型风能太阳能互补实训装置。该装置由电压比较器、蓄电池防过放控制器、自动切换备用电源模块、开关电源、按钮、中间继电器和PLC等组成的光伏孤岛供电系统。引导学生就任务进行发散思维,自主设计流程和实现方案,完成直流负载的不间断供电,有效提升学生的创新意识和动手能力,更好地落实立德树人。

核电仪控系统结构产品模块化设计方法研究

核电仪控系统使用的结构产品要求性能稳定可靠,根据历年数十台机组项目实践,笔者提出了适用于核电仪控系统结构产品模块化设计的方法。较之传统设计方法,模块化设计方法重新定义结构产品设计过程,该设计过程是一个已被反复验证的、可靠的模块化结构进行产品搭建的过程,设计过程中产品在固有的、稳定可靠的模块构成基础上不断迭代优化,使产品性能趋于稳定可靠。使用该方法设计完成的产品在生产制造阶段,会引导供应商从定制加工转向类同化、批量化结构重复加工过程,改变了供应商的制造习惯。本文基于智能制造技术发展趋势,结合相关的法规标准,为解决传统设计方法的缺陷,提出该模块化设计方法。该研究结果为后续核电仪控系统结构产品设计开发提供了技术参考。

高空大跨斜牛腿支架设计分析及工程应用

常用高空现浇梁存在支架地基处理难度大、支架用钢量大、费用高、支架高宽比大、搭设高度受限及稳定性不足等问题。为解决上述问题,自主设计了一种用于高空现浇结构的大跨斜腿支架,详细阐述了该种支架的设计构造、受力机理、施工工艺等,通过有限元软件建立斜牛腿支架力学计算模型,分析其承载能力和变形情况。该支架在赣深铁路高峰水库特大桥中成功应用,缩短了施工工期,确保了施工安全,还大幅节省施工成本,为今后类似高空现浇混凝土结构提供施工参考。

基于物联网技术的电厂安全生产系统设计与应用

通过借助传感器、智能终端等物联网技术,可以实现对电厂生产管理信息的实时获取,并将这些数据存储至服务器中,不仅实现了实时了解电厂生产进程和简化日常运行巡检流程的目标,还提升了管理者的工作效率和日常管理品质。通过物联网技术,管理者能够更好地监测电厂的运行状态,并基于数据进行决策,为电厂的智能化运营提供坚实的基础。

供电抢修中数字化技术运用研究

文章首先介绍了供电抢修中数字化技术的应用现状,其次明确了供电抢修中数字化技术应用的必要性,论述了供电抢修中数字化技术运用的可行性,最后深入探讨了供电抢修中数字化技术的实例应用及成效,谨供相关人士参考借鉴。

大型发电厂烟气脱硫系统的设计与应用探究

大型发电厂的烟气脱硫系统具有复杂化、自动化程度高等特点。围绕某大型发电厂的烟气脱硫系统的设计展开了一系列分析,介绍了烟气脱硫系统的作用与意义,针对烟气脱硫系统的组成情况及关键部分的设计方案进行了重点描述说明,包括吸收塔、湿式电除尘器、吸收剂制备系统、物料再循环及排放系统、工艺水系统、控制系统几大子系统模块内容,并展示了该系统的168h试运行情况。通过对大型发电厂烟气脱硫系统的设计与应用探究,为相关行业工作人员提供技术参考和依据。

火力发电厂的电气控制系统设计及应用研究

随着时代的发展,民众对于电力工作的需求也在不断提升,为了满足民众日益增长的电力需求,电力供应企业应不断提升自身的自动化与稳定性水平。火力发电是我国当前主流的发电方式,其生产水平与控制技术均发生了比较明显的改变,尤其是电气控制系统设计的自动化水平显著提升。通过查阅相关文献,简要分析了火力发电厂电气控制系统的现状、结构等内容,结合相关科学理论知识,进行了火力发电厂的电气控制系统设计,该系统能够实现高效、可靠运作。希望此研究内容能够为提升火力发电厂电气控制系统的运行水平提供一定理论支持。

消防设备电源监控系统在电气设计中的运用探究

消防设备的系统使用功能如果要得以最大化体现,则必须采用消防设备电源的监控管理系统作为支撑。在当前时期的建筑电气设计规划中,针对建筑电气系统应当配置消防设备的自动化监控与报警装置,旨在确保消防设备与建筑电气连接的智能监控报警系统发挥出应有的消防安全保障价值。因此,主要结合消防设备电源的自动化监控系统布局设计方案要点,探析建筑电气设计实践中的消防设备电源监控完善对策。

市政工程电气低压配电设计技巧的探讨

市政工程作为城市建设发展重要内容,其工程建设质量会影响城市发展水平,左右城市居民生活质量。低压配电作为市政工程有序实施的技术保障,需要立足于低压配电实际进行深入研究,掌握相关设计技巧,提升低压配电工程质量。本文分析了市政工程电气低压配电的设计技巧,包括线路设计、接地设计、节能设计以及配电方式,随后介绍了市政工程电气低压配电的设计应用,包括线路安装、线路调试等,希望能给相关人士提供有效参考。

OTN技术在电力通信传输中的运用分析

随着社会的不断发展与进步,人们对电网系统运行的安全性与稳定性提出了更高的要求。如何提高电力通信传输的性能已成为从业者和相关技术人员需要解决的关键问题。文章从光传送网(Optical Transport Network,OTN)技术的概述和主要特点切入,分析电力通信组网过程中的相关需求。从网络拓扑设计、光放大器设计、保护方案设计、网络配置设计以及系统调试等角度出发,设计OTN电力通信组网方案,以期为相关技术人员提供参考。

光伏发电系统远程监测平台设计及其稳定性应用的实践探索——以“源网荷”一体智能光伏实验室电网项目为例

针对传统光伏发电系统现场监测方法现场作业工作量大、数据分析难度高等问题,探索高效且高质量的光伏发电系统监测方式,促进实现对光伏发电系统的电智能化管理并保障其运行稳定。依托广州市机电技师学院“源网荷”一体智能光伏实验室电网项目,设计构建光伏发电系统远程监测平台,在平台各功能模块中综合运用物联网、云计算、大数据等现代信息技术,并在平台实践应用中重视相关可能故障的控制和管理研究,以保障平台稳定高效运行。通过设计数据信息传递与数据存储、数据分析处理、可视化数据界面和远程控制功能等模块,实现远程数据采集、智能分析、数据可视化呈现和远程控制等功能,对光伏发电系统进行实时、准确的监测和管理;并针对光伏发电系统中主要常见的通信故障、数据异常和系统故障,提出加强设备的检修和维护工作、使用高质量的自动化设备等管理措施和建议。此外,根据平台监测结果推断,数字化和智能化且高质量的光伏发电系统远程监测平台应用,有助于推动光伏发电产业发展、提高能源利用效率、推动环境保护,并为智慧城市的智能应用和管理提供支持。

组合动力飞行器模态转换段推阻匹配与控制律设计

针对组合动力飞行器在进行模态转换时,发动机推力的损失以及进气道进气时对飞行器周围气流的影响,导致飞行器本体动力学特性呈现出强烈的非线性、耦合性和模型不匹配性等问题。文中根据涡喷发动机和冲压发动机输出推力随流量变化的关系,提出一种流量分配方案补偿了发动机动力切换时的推力损失。考虑到组合动力飞行器模态转换段动力学的复杂性,采用L1鲁棒自适应控制实现飞行器的内环增稳,采用蒙特卡洛打靶方式验证控制律的鲁棒性。仿真实验证明,设计的控制律具有一定鲁棒性。

赞比亚电网稳定控制系统的研究和应用

随着赞比亚电网规模不断扩大,电网的安全稳定问题越来越突出,也曾发生过区域电网停电事故。依托南京南瑞继保电气有限公司的赞比亚稳控项目,对赞比亚电网运行的安全稳定问题进行了分析,制定了合理的控制策略,提出了赞比亚稳定控制系统的整体设计方案,并详述了稳定控制系统在赞比亚电网的工程应用,为今后稳定控制系统在海外的推广提供了重要的借鉴。