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The following considerations in the selection and design of electrical apparatus for oil and gas well drilling rigs are discussed: 1) general rig environment and geographical environmental effects; 2) selection and/or verification of drilling motor torque requirements for draw works, rotary table, and pumps; 3) four quadrant (speed-torque) analysis for draw works and rotary table; 4) merits of application of three types of adjustable speed drives (Ward-Leonard, thyristor type dc converters and adjustable frequency inverters); and 5) general power distribution considerations such as generating capacity, voltage selection, fault calculations, system grounding, voltage and frequency dip, power factor, and harmonic currents. 相似文献
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地区电网电能计量系统的设计思路 总被引:2,自引:0,他引:2
地区电网的电能计量系统是电网的日常生产管理和日后地区电网电力市场运营的重要技术支持系统,从地区电网的特点出发,分析了地区电网电能量计量系统的功能目标和设计原则,并对各种类型的地区电网的电能量计量系统提出设计方案。 相似文献
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以数据中心机房为例,对其供配电、照明、静电防护、防雷与接地、电磁屏蔽、机房布线、机房监控与安全防范、火灾自动报警等电气系统设计措施进行详细论述,可以为类似数据中心机房的电气系统设计提供参考。 相似文献
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介绍了低压配电系统中断路器的选型原则.从回路负载电流和短路电流的计算出发,给出断路器额定电流和分断能力的选择方法.对断路器选型中实现选择性保护的类型、条件和实现途径进行了分析,并对影响断路器选型及系统正常运行不可忽视的电缆参数选择作了介绍. 相似文献
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介绍了低压配电系统中断路器的选型原则.从回路负载电流和短路电流的计算出发,给出了断路器额定电流和分断能力的选择方法.对断路器选型中实现选择性保护的类型、条件和实现途径进行了分析,并对影响断路器选型及系统正常运行不可忽视的电缆参数选择做了介绍. 相似文献
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The use of amorphous ferromagnetic materials for the magnetic circuits of distribution transformers could reduce the losses associated with iron cores and result in substantial economic savings to utilities. The value of such savings obviously depends on the loss evaluation. Optimization calculations show that this value varies according to the transformer design. A comparative performance evaluation revealed the advantages and shortcomings of four different transformer designs and of different types of steel used to build the magnetic circuits. The paper finally gives a few design details of a pre-prototype distribution transformer, developed at IREQ, which has an amorphous-alloy magnetic circuit. 相似文献
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Some probable reasons behind the increasing occurrence of voltage escalations, arcing ground falls, and other phenomena that take place in the part of the distribution system containing motors and motor control are discussed. While this part of the typical power system is subject to the harmonic resonances and other voltage escalation phenomena occurring elsewhere, it has some unique components of its own. 相似文献
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电容层析成像系统传感器优化设计及仿真 总被引:8,自引:0,他引:8
本文以8电极油水两相流电容层析成像系统为研究对象,针对图像重建的质量依赖于电容敏感场分布这一特性, 采用有限元的方法建立敏感场的数学模型,采用不等间距的方法完成了传感器场域的自动剖分和敏感场的数值计算。对决定传感器性能的结构参数进行选取,通过仿真分析确定了传感器的优化参数,从而使设计的传感器能够在缩小测量电容值的动态变化范围,减轻数据采集电路设计难度的同时,提高电容响应的灵敏度,改善传感器敏感场的分布,提高电容层析成像系统的性能。根据此优化参数设计和研制的电容传感器获得了较为理想的重建图像。 相似文献
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基于现场总线技术的电气控制系统的设计 总被引:1,自引:0,他引:1
本文介绍了现场总线的概念、协议模型和相关标准,分析和总结了工业过程控制系统通信网络要求和电气控制系统的功能要求,提出基于现场总线技术实现电气系统和过程控制系统的集成的解决方案,该方案是控制系统现场网络的发展方向。 相似文献
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There is a need for industrial control system designs to be less dependent upon the implementation and source of the various elements within the system, including the control computer. However, a number of system design considerations confront the user of computer-independent industrial control hardware. Various software implications and organizational considerations are discussed, along with hardware organization parameters. Solutions to various software and system problems are proposed by applying the computer automated measurement and control (CAMAC) digital interface standard. 相似文献
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介绍了一种多发电机组电气参数监测处理机系统的研制的思路,阐述其主要性能指标及技术创新,并介绍其关键技术问题及参数处理算法. 相似文献
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通过建立模糊评判模型,并对设计方案评判的指标体系及隶属度函数进行分析,完成电机设计方案的综合评价.再从设计过程优化的角度出发,建立了面向电机设计全过程的综合评价系统,提高电机CAD系统的智能化水平. 相似文献
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EST-C1变电站电气试验车适用于电力变电站及电气化铁路牵引变电所的电力设备的工程交接试验及预防性试验,介绍了在关系型数据库开发系统Foxpro下,基于数据流的电气试验动态软件的设计和实现。 相似文献
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0引言 我公司现有4条700t/d湿法华新窑(φ3.5m×145m)和1条1700t/d窑外预分解窑(φ3.5m×47m),与之配套的原煤均化库储存容量较大(203m×19.6m×12.5m),均化库原来只分南北2个仓. 相似文献