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为应对远方集中监控模式所带来的大量远传信号校核工作,提出一种快速校核方式。以最主要的遥信类信息为例,利用遥信报文信息片中SOE时间标志位来携带其所对应调控信息对象地址,由仿真软件模拟智能变电站间隔层装置自动批量发出MMS报文格式的站内遥信变位信号。该信号将携带所属地址信息,并经远动装置接收后转换成104规约报文发给主站。主站依照信息对象地址与SOE时间数值的一致性对所接受到的远动信号进行判断,独立完成远动装置信息转换的正确性确认。该方式较常规的人工校核方式有很大的效率优势。 相似文献
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电网调度自动化SOE及GPS校验实现技术 总被引:1,自引:0,他引:1
电力系统精确的统一时钟是运行监控和事故后故障分析的基本前提,提出并分析了综合校验实现技术的原理与实现方法.事件顺序记录(SOE)及全球卫星定位系统(GPS)综合校验技术是利用GPS取得标准的统一的同步时标,配合自动化技术的功能设计,实现对调度系统厂站内/站间事件分辨率、系统同步时钟、系统过量遥信变位处理能力的校验测试.通过模块继电器空接点输出脉冲来比较被测系统各遥信点对同一事件的SOE分辨率及各单元对同一事件响应的时间差异.通过模块遥信变位输入来检验现场设备变位时间的准确性.应用开发的校验装置,试验结果表明达到设计技术要求. 相似文献
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针对智能变电站远动装置的调控信息联调工作传统调试方法存在的弊端,讨论了远动信息联调工作的核心,通过深入研究站内不同数据源信息之间的关联关系,同时依托IED仿真技术、SOE时间和104地址的唯一性等条件提出了一种针对远动装置全站遥信配置的快速校核技术方案。开发了由IED仿真工具、模拟主站工具、多数据源离线处理工具等模块组成的智能站远动信息智能调试系统。经工程应用实践,提出的远动装置遥信配置快速校核技术实现了远动信息联调工作的离线化、机器化和记录可溯源,极大提高了调试效率,相应开发的调试工具具有较高的可行性和可靠性。 相似文献
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在辨别电网故障时各类事件发生的先后顺序中,SOE记录具有重要意义,可以为电网调度运行人员正确处理事故、分析和判断电网故障提供手段。如何正确识别开关抖动信号,保证SOE不误报、不漏报,是我们需要考虑和解决的问题。对目前采用的遥信去抖方法进行分析,指出不同方法的特点。构建测试系统环境,在不同遥信去抖方法下,对SOE结果进行对比统计和分析。最后建议能够统一遥信去抖设计方法,保证SOE记录的精确性。 相似文献
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在辨别电网故障时各类事件发生的先后顺序中,SOE记录具有重要意义,可以为电网调度运行人员正确处理事故、分析和判断电网故障提供手段.如何正确识别开关抖动信号,保证SOE不误报、不漏报,是我们需要考虑和解决的问题.对目前采用的遥信去抖方法进行分析,指出不同方法的特点.构建测试系统环境,在不同遥信去抖方法下,对SOE结果进行对比统计和分析.最后建议能够统一遥信去抖设计方法,保证SOE记录的精确性. 相似文献
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1.IntroductionTakingadvantageofthedevelopmentofdricroelectronicsandcomputertechnology,onemethodcajledACmeasurementisappliedtoelectricalmeasurementofpowersystemmoreandmorebecauseofthereduchonofsignaltransformahonandtheuseofdigitritechniques.Itischaracterizedwithhighaccuracy,stabilityandintelligence.Thereforethetradihonalmetermethodcyransducer DCmeasurement)maybereplacedbythismethod.TheRootofMeanSquareacS)meth(xlandtheFourierMethodabasealonFoulerSeriesandF()uherTransformahon)aretwowidel};u… 相似文献
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在电厂中,事件顺序记录(SOE)作为分析设备故障和生产事故的重要工具,阐述对分散控制系统SOE进行性能测试的必要性,介绍常用的SOE测试方法,应用0113-B型测试仪对SOE测试过程及内部原理进行描述,结合山东电网中各机组SOE的测试结果,对所出现的问题进行分析,提出相应解决方案。 相似文献
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从电厂DCS的SOE功能在实际应用中出现的问题出发,阐述了网络时钟同步对SOE功能的影响,提出了在OVATIONDCS网络时钟服务器设置的具体方法,使DCS网络时钟精确同步。 相似文献
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The energy consumption of a battery-powered train in an interstation depends on the running time and state of energy (SOE) at departure. In this paper, we develop an optimization method of train timetables to minimize energy consumption in line with several stations. The variables in this proposed optimization model are running, dwell, and charging times as real numbers and places of charging facilities as binaries. Additionally, we conducted a case study using the real-world light rail transit (LRT) route, vehicle, and onboard battery model to confirm the effectiveness. In the case study, the proposed method can optimize the timetable and placement of charging facilities by considering the track gradient and battery SOE. 相似文献
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电气化铁道远动数据库系统业务流程的UML建模 总被引:2,自引:0,他引:2
电气化铁道远动系统由电力牵引变电所RTU、远动通道和铁路局电力调度中心主站端系统构成。分析了系统的数据流程,给出了流程图及系统实现的功能。运用统一建模语言(UML)进行设计,对处理高实时性一级数据采用基于发布/订阅的对象请求代理(CORBA)通知服务实现;描述了处理报警信息、后台服务器数据获取等。根据不同类型的数据有不同的特点及对应的应用范围也是不同的,提出要根据应用需要分别进行建模。通过在多个大型实际项目中的成功运行验证了建模的正确性。 相似文献
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Hilde Bosmans Jan Bogaert Frank Rademakers Guy Marchal Gerhard Laub Johny Verschakelen Albert L. Baert 《Magma (New York, N.Y.)》1996,4(2):123-133
Myocardial tagging with magnetic resonance (MR) imaging offers unique possibilities for noninvasive left ventricular (LV) strain analysis. True three-dimensional strain analysis can be achieved with tags implemented in cardiac short axis and long axis images. Spin-echo (SE) techniques have been used for these studies. However, this approach is time-consuming: images at different phases of the cardiac cycle have to be obtained in successive measurements and hence the total number of measurements equals the number of time frames. Moreover, the images are often degraded by flow and motion artifacts. The purpose of this study was to optimize a faster and more robust MR tagging sequence for use on a clinical whole-body 1 T MR system with optimal persistence of the tags during the entire cardiac cycle. The tagging pulses were implemented in gradient-recalled-echo (GRE) sequences and compared to SE-based acquisitions. The effects of the use of flow-compensating gradients, the excitation angles, and the angles of the saturation pulses have been studied with MR signal simulations and in comparative measurements in volunteers. GRE acquisitions with flow-compensating gradients are robust techniques for myocardial tagging acquisitions. Use of optimized flip angles and saturation pulses can significantly improve delineation of the tag and can be used up to at least 700 ms after the R-wave. Therefore, LV tagging with GRE acquisitions using optimized MR parameters is a robust and promising technique. 相似文献
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Venkatesh B. Dukpa A. Chang L. 《Electrical and Computer Engineering, Canadian Journal of》2009,34(1):69-74
This paper formulates a set of equations (SOE) to describe a radial distribution system with high R/X ratio. The SOE comprises 3(N ? 1) second-order equations and an equal number of variables for an N-bus system. The proposed method solves this SOE using the first-order Newton-Raphson technique. The SOE model accounts for elements such as transformers, transmission lines, shunt capacitors, constant PQ loads, and constant impedance loads. Irrespective of the R/X ratio values of the lines in the system, the SOE preserves a strong diagonal characteristic. As well, this SOE is devoid of bus phase angles, unlike the 2(N ? 1) ac power flow equations used to describe transmission systems. The proposed method is compared with other methods reported in the literature for distribution systems, such as Newton-based methods and recursive methodologies that use forward and reverse sweeps. Tests conducted on radial distribution systems with 43, 69, and 5002 buses show the new method to be more accurate than other methods reported in the literature. 相似文献