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基于IEC61850标准的工程开发方法研究 总被引:1,自引:0,他引:1
在分析IEC61850标准的变电站分层、面向对象的数据对象统一建模和抽象通信服务映射等内涵的基础上,从系统功能建模、信息模型构建、SCL文档配置、通信映射等方面入手,提出一整套的实践IEC61850标准的工程开发方法.以过程总线通信中跳闸命令传输为例,详细阐述了智能电子设备(IED)开发过程.基于该方法,不同厂商开发的IED具有互操作性,并使变电站自动化系统成为数字化系统. 相似文献
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IEC61850是将来变电站无缝通信体系的基础,国内对IEC61850的研究还主要停留在理论层面上,对它的实际应用的研究并不多见,本文从实际应用角度出发,以故障录波通信系统为目标,采用了面向对象的技术,详尽分析了基于IEC61850的IED(故障录波器)的建模,传输中数据库的建立、数据链接以及ASCI到具体通信栈的映射的实现,并通过PC机得到模拟结果,取得了较理想的结果,为工业变电站自动化应用IEC61850做了前瞻性工作. 相似文献
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针对变电站IED之间的互操作性差、难以实现信息交互的问题,结合变电站技术改造,探讨了基于VxWorks嵌入式实时操作系统的IEC61850报文实现。借助VxWorks的Wind微内核提供的多任务环境、进程间通信和同步功能,讨论了任务调度策略、通信、同步和互斥机制,研究了信息模型的通信映射与快速报文传输服务,构建了实现IEC61850的信息模型实体,分析了快速报文在Wxvorks中的实现,给出了最优推荐方案。变压器经济运行自投切换初步实验结果表明,IEC61850变电站自动化最新国际标准的实施有利于采用最新通信技术实现对电力参数的监控,为系统拓展预留了广阔的空间。 相似文献
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为了将大量不支持IEC61850标准的智能电子设备接入采用IEC61850通信系统的变电站综合自动化系统中,在分析变电站通信管理机的功能要求及其在变电站通信系统中的应用方式的基础上,介绍了一种变电站通信管理机的软硬件总体设计方案。该通信管理机基于Atom 230微处理器和Linux嵌入式操作系统设计,具有多网口、多串口,满足多种智能电子设备的接入需求,可实现传统通信协议向IEC61850标准协议的转换功能。 相似文献
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张井广 《自动化与仪器仪表》2008,(1):38-42
IEC 61850"变电站通信网络和系统"是关于变电站自动化的最新国际标准,本文首先简单论述了故障信息处理系统的现状及标准化建设的必要性,然后详细介绍了IEC 61850对于故障信息处理系统的指导作用.文中提出了将故障信息处理系统子站看作是一个特殊功能的智能电子装置IED,介绍了遵循IEC 61850的保护装置的对象建模方法. 相似文献
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《软件》2017,(3):104-108
目前,智能变电站同步相量测量系统仍然采用IEEE 1344规约并使用专用通道与主站进行通信,而未采用在智能变电站中普遍采用的IEC 61850标准通信,这既增加了电网建设投资,也给系统运维带来不便。针对上述问题,本文提出基于IEC 61850的同步相量数据传输方法,即将同步相量测量系统的传输方法映射到IEC 61850标准体系,并将现有的通讯服务所包含的功能在IEC 61850标准体系下找到实现的手段。首先针对高速的数据传输和快速控制提出实现方法,然后对IEC 61850服务不能完全实现的功能服务以规定的方式对功能做扩展填补缺陷。最后从统一变电站信息平台的角度,对本方案的前景进行了分析。结果表明同步相量测量系统转换到IEC 61850体系是可行的,并将为信息的联合分析提供了基础。 相似文献
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基于IEC 61850和MMS的变电站监控设备网关研究 总被引:1,自引:0,他引:1
在分析当前变电站通信协议和IEC 61850标准及MMS特点基础上,提出一种基于IEC 61850和MMS的常规变电站设备网关系统结构,在保留原有监控系统软件和硬件资源情况下,将常规变电站设备接入IEC 61850环境,保护原始投资,节省资源,还能解决不同厂商设备的互操作问题。 相似文献
11.
S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
12.
European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
17.
David Poole 《Computational Intelligence》1989,5(2):97-110
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given. 相似文献
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Watts S. Humphrey 《Annals of Software Engineering》2002,14(1-4):39-72
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical. 相似文献
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基于复小波噪声方差显著修正的SAR图像去噪 总被引:4,自引:1,他引:3
提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。 相似文献
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R. NOSS 《Journal of Computer Assisted Learning》1987,3(1):2-12
Abstract This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development. 相似文献