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1.
随着电网调度自动化水平的不断提高,对能量管理系统(Energy Management System,以下简称EMS)的各项功能提出了更高的要求。因此需要对原有的EMS系统进行全面更换,以提高硬件配置水平和软件功能。那么在EMS系统更换过程中,如何实现新旧系统的"安全过渡",变电站"四遥"信息如何在不影响电网调度运行的前提下,安全可靠接入新系统,直到新系统独立承担调度运行任务,本文将向各位提供一个参考。 相似文献
2.
电力信息化是指信息技术在电力工业中的应用,电力工业信息化的核心是电力工业管理信息系统(MIS)的建设,当前,我国电力企业信息化的主要工作是整合现有的办公自动化(OA)、MIS系统、电力市场和营销系统、电力调动系统(EMS)、配电管理系统(DMS)和呼叫中心(Call Center)等电力行业信息应用系统。 相似文献
3.
文章简要介绍了锂电池、钠硫电池等几种不同的电池储能技术的特点、国内外发展现状,分析大容量电池储能技术在电网中的应用前景. 相似文献
4.
本文以河北钢铁集团唐山钢铁分公司能源管控中心工程项目为例,详细介绍能源管控系统（EMS系统）在钢铁企业中的应用。唐钢能源管控中心工程是落实精细化管理理念、实现能源综合利用和自动管理控制以及能源效益最大化的唐钢重点顷目。能源管控中心项目内容包括：建设能源中心办公楼一座,建设能源中心管理信息三级网络系统,完善现场一次仪表设施。建设EMS系统实现现场能源数据采集、能源流实时监控和能源流网上调度平衡及部分站室无人值宪能源报表分析等。 相似文献
5.
文章首先对电力备用调度系统的SCADA、EMS以及DMS系统等主要应用系统进行了介绍,然后详细地分析了曙光在国调跨区电网动态稳定监测系统的解决方案。 相似文献
6.
办公自动化是一种实用性较强的系统。通过研究工作流管理在OA系统中的应用,描述了工作流管理系统的功能、设计及其实现,并探究了公文流转在OA系统中的应用。 相似文献
7.
配电网是电力系统发电、输电和配电三大系统之一。供电部门通过配电网向广大电力用户提供电能。本文从系统的建设目标出发,对配网自动化系统的体系结构、方案设计、新技术应用及实施情况进行介绍。本文基于IEC 61970标准体系建立了对EMS系统的图、库模型共享体系,通过调度自动系统前置网与配网自动化前置网的物理连接,形成了EMS系统向DMS系统实时数据的转发通道,实现了实时数据共享,提供了W eb-GIS与W eb-SC ADA应用展示平台。 相似文献
8.
文章首先对电力备用调度系统的SCADA、EMS以及DMS系统等主要应用系统进行了介绍,然后详细地分析了曙光在国调跨区电网动态稳定监测系统的解决方案。 相似文献
9.
EMS调度自动化系统在地区电网中安全调度应用的探讨 总被引：1，自引：0，他引：1
随着计算机技术、网络技术、通信技术、现代电子技术以及信号处理技术的发展,为电网调度自动化及其支撑平台的发展提供了技术条件。回顾电网调度自动化的发展过程,概述红河地调调度自动化现阶段的功能应用情况,对EMS电网调度自动化系统在安全调度中的运用进行探讨。 相似文献
10.
张伟 《大科技．科学之谜》2014,(1):58-59
电力供应系统是我国电网运行的基础设施,它的有效运行为变电所供配电的高效工作提供了保障。随着技术的进步和信息化时代的到来,对供电系统提出了新的要求,自动化管理成为变电所管理系统的必然趋势。电能量管理系统是变电所自动化系统的重要组成部分,本文就电能量管理系统的嵌入式网络化进行了论述,分析了电力系统和嵌入式系统的发展,论证了电能量管理系统实施嵌入式管理的重要意义。 相似文献
11.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
12.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
13.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
14.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
15.
A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
16.
Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
17.
Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
18.
Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
19.
Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
20.
《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献