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在简要介绍广东国华粤电台山有限公司1、2号(2×600 MW)机组电气设备选型情况基础上,分析了电气 设计上的特点以及存在的不足,最后就该工程的设计管理提出了相应的建议。 相似文献
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An Assessment of Energy Cost Trends on Electrical Equipment Selection for the Petrochemical Industry
The historical relationship of energy and equipment costs and their impact on decisionmaking are presented. From this base, projections of energy costs and equipment costs are presented and the decisionmaking is re-examined with regard to alternative solutions. Sensitivity analyses are developed around variations in forecasted data and in economic parameters. Electric motor and transformer examples are used to present salient points in the analysis. 相似文献
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General techniques of the three groups required to design, install, and maintain foreign electrical equipment are presented. The goals of the groups, design, construction, and maintenance engineering, for building and operating a plant are compared in reference to obtain the best equipment, installation methods, and minimum downtime problems necessary to produce a quality product at the lowest possible cost. The problems of foreign equipment are of the same type and magnitude as United States equipment. Proper planning by management with engineers and supplemented by an adequate spare parts supply necessary for proper maintenance will provide the necessary technical know-how. 相似文献
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Today, designers are faced with the challenge of ensuring that all important facility functions are protected from power failures both externally and internally by providing one or more backup supply to the primary source (typically utility service). Each application has its own unique requirements of the Emergency Electrical Power Systems (EEPS) for performance, reliability, and speed to assume the load, and the length of time it must be able to provide emergency power. Lack of industry-wide definitions and standards are severely limiting the availability of equipment and services from which the users can make the best choice for his particular needs. To solve these problems, organizations such as IEEE, EMA, UL and NFPA are now, through representatives of users, the insurance industries, consulting engineers, inspectors, and manufacturers, engaged in an effort to develop definitions and guidelines. Some of the basic problems are explored, the rationale behind the present industry efforts to find a solution is given, and an approach using multiple levels and classifications of Emergency Electrical Power System is suggested. 相似文献
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随着火电空冷机组在工程中大量的采用, 通常主厂房 A列外电气设备的布置由于受空冷装置的影响, 引起了电气设备的布置和选型的变化, 与大家共同探讨解决办法。 相似文献
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李辉 《可编程控制器与工厂自动化(PLC FA)》2006,(3):132-135
干气提浓乙烯装置脱氧系统、脱砷系统共有四台电加热器:E-402(600kW)、E-404(560kW)、E-406(500kW)、E-407(200kW)。该电加热器自投用以来运行平均每5分钟就会出现一次内部超温报警,电加热器自保停机,每次停机后需要人工现场复位,等待内部温度降到设定温度后才能重新本文从介绍电加热器的工作原理入手,分析其在:工艺中加热方式,找出影响加热器不能稳定工作的原因。 相似文献
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电气主接线是水电站电气部分的主体,它与电力系统、电气设备的选择和布置都有关系,直接影响电站的运行维护和投资.本文结合奎屯河2#小水电站的工程特点,拟定了几个主接线方案,对各个主接线进行详细的技术经济比较,最后选定技术上先进,经济上合理,便于运行管理维护的最优方案,作为水电站电气部分设计的依据.电气设备的选择,其中的关键是确定主变压器台数和主变压器容量,及开关设备的选择,选择合理的电气设备为供电的可靠性提供了重要的保证. 相似文献
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电气设备操作拓扑“五防”的实现 总被引:1,自引:0,他引:1
随着区域监控中心成立和调控一体化系统投入运行,变电站五防系统已经不能满足监控中心遥控操作的需求,从现有的五防系统存在的弊端着手,分析监控SCADA中设备的拓扑关系,阐述了拓扑五防实现的功能,利用拓扑五防结合现场变电站的防误装置,实现防误功能的最大化。 相似文献
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针对接触器电寿命试验的特点,利用晶闸管技术和单片机控制的方式设计了一种无触点试验设备,用于替代原有的采用接触器作为陪试品的试验方式。该设备具有成本低、控制精度高、响应时间短、可靠性高等特点,可满足低压电器检测行业的发展需求。 相似文献
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本文详细介绍了有关电器产品进入新加坡市场的最新准入要求,相关的法律法规以及获得安全认证的工作程序和认证机构的信息,以便更好指导中国的出口产品能够符合新加坡的强制性安全要求,顺利获得注册,促进国际贸易。 相似文献
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The electrical equipment and systems for a specific aluminum cold rolling mill for attaining rolling speeds in access of 8000 ft/min are described. New systems applications in automatic guage control, main drive systems control, automatic mill preset functions, automatic sequencing, and positioning systems are also presented. 相似文献
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时常听到有人埋怨,家庭影院的AV放大器在播放CD时,频响不够宽,层次感、细腻感不够好,乐曲定位差,与纯HI-FI器材播放的效果差一大截。的确,目前家庭影院中的AV功率放大器的音质大多不尽如人意。不过,家庭影院的放音系统主要任务是还原数字环绕声信号,营... 相似文献