共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
1变电站概况.220kv万安变电站于1995年4月正式投运,2204年进行扩建改造。目前拥有120MVA主变2台,220kV线路2条,110kV线路6条,与岩寺、新潭、大路口、黟县等110kV变电站相连,承担着黄山电网70%以上的负荷,是黄山电网的核心枢纽变电站。扩建改造后的万安变监控系统经过一年多的运行考验,系统运行稳定、可靠,各项功能和技术指标基本达到设计要求,能满足变电站安全运行的需要。 相似文献
3.
4.
5.
6.
某110kV变电站在综自改造过程中,为确保可靠供电,运行方式十分特殊.针对该站110kV线路的保护定值进行了详细分析后,指出了其距离保护定值的错误,并做出了修正.运行结果表明,修正后的定值能够使保护装置正确动作,保证了电网的安全稳定性. 相似文献
7.
220kV变电站增容改造 总被引:1,自引:0,他引:1
随着城市旧区改造带来的负荷增长和电网结构的变化,为了增加输送容量,满足地区供电需求,需要对原变电站进行增容改造。文章介绍了220kV天宝变电站的110kV GIS改造方案,并对不同的改造方案进行了分析与比较,并提出了220kV变电站的扩大110kV配电送出能力的解决方案。 相似文献
8.
GIS设备串联谐振耐压试验在现场的应用 总被引:1,自引:0,他引:1
SF6金属全封闭组合电器(GIS)是变电站的主要设备,检验GIS设备的制造质量和现场安装质量对确保电网安全可靠运行有重要意义,介绍了芜湖供电公司应用串联谐振装置对吉和变电站110 kV GIS设备进行安装后的现场耐压试验的实践过程,分析和讨论了试验注意事项、容升现象和结束判断,可供同类现场试验参考。 相似文献
9.
10.
六氰化硫封闭式组合电器(GIS)在电力系统中正逐渐增多,检验GIS设备的制造质量和现场安装质量对电网的安全、可靠运行有着重要意义。通过对GIS设备的串联谐振试验能够考核GIS设备的绝缘水平,文中详细介绍了现场对GIS设备进行串联谐振试验的方法及流程,并以芜湖110kV吉和变电站为例作了具体说明。文中还介绍了GIS设备现场试验的经验和体会。 相似文献
11.
12.
13.
《电气》2011,(2):14-18
With the incessant development of power market reform,the existing cross-subsidy in electricity tariffs has become a critical problem in China’s power industry development.On the basis of the theories of cross-subsidy and electricity universal service,the authors take foreign countries’ experience as reference to design several solutions to cross-subsidies in electricity tariffs in different phases of China’s power industry development.Furthermore,the application and implementation of these solutions are analyzed in this paper. 相似文献
14.
The author suggests that the confidence which many biologists have in problem-solving methods is unwarranted and that there are very important limitations in almost all current methods for solving biological problems. The standard problem solving approach that computer scientists use is outlined. An example of an error in an evolutionary tree problem-the case of the African Eve-is discussed 相似文献
15.
无色透明材料形成的单层薄膜,其颜色由干涉色决定。以白光照射其表面,随薄膜厚度的增加,将出现一系列色彩,这是由薄膜干涉所致。我们可以根据薄膜颜色,估计薄膜厚度。显然,当厚度增大到后界面的影响可以忽略不计的程度(相当于只有一个界面的半无限大情形,本文简称“厚膜”),则“厚膜”颜色恢复为无色透明。半透明材料在基底上形成的薄膜系统,以白光照射所呈现的颜色,由于基底及吸收的影响,则不能简单地以薄膜干涉来分析。对于半透明薄膜系统,首先测量它的光强反射率谱和透射率谱,运用传递矩阵[1]方法计算出薄膜的介质光学常数,再以光学常数计算单层薄膜与“厚膜”的光强透射率谱与反射率谱及它们的色坐标。以菲涅耳公式计算出的反射率谱为半无限大介质反射率谱,这时的色坐标可视为“厚膜”的色坐标。 相似文献
16.
A survey is provided of Japanese research on ceramic materials for substrates, microwave dielectric ceramics, piezoelectric ceramics, semiconducting ceramics, and superconducting ceramics. Novel processing technologies are described, covering the use of amorphous materials, superfine powders, lamination, multilayer thin films, porous ceramics, and superlattices 相似文献
17.
18.
Recent progress in inverse problems in electrocardiology 总被引:5,自引:0,他引:5
The considerable progress achieved in the inverse problem of electrocardiography over the last decade has provided grounds for optimism about the possibility of approaching significant clinically relevant applications in the next decade. However, there are a number of basic questions that still remain. In addressing these questions, the authors feel it is important to seek solutions that emphasize physiological rather than mathematical significance. This approach leads to twin requirements for useful inverse solutions: accuracy, defined in a physiologically meaningful (and not just averaged and mathematical) sense, and reliability, not only to measurement noise but also to geometric modeling errors and other uncertainties that are inescapable in practical application. Studies using analytically tractable models may still be relevant, but it seems more important to find solutions to practical inverse problems, which will move the field toward wider acceptance and credibility 相似文献
19.
20.