电力专业英语PPT课件
电类专业英语教学课件ppt作者汪建宇03a（41-103）P63wxd
第3章阅读与翻译Text1Preventive MaintenanceNew Words And Expressions adjustment n.调整，调节；校正approach n.方法consistent adj.一致的；前后一贯的，稳定的device n.装置，设备，器件expectancy n.预期，期望inspection n.检查，检验lubricant n.润滑油maintain vt.维护；保持malfunction n.故障，失灵predetermined adj.预定的，推定的preventive adj.预防的；防止的；防护的susceptibility n.敏感性，灵敏度thought-out adj.周密的；周到的vital n.至关重要的wear vt.磨损，损耗suit the need(s)of适合……需要up to由……决定in regard to考虑到break in合用，进入正常阶段wear out磨损，损耗preventive maintenance经常性维护保养periodic checkup定期检查wear factor磨损/损耗因素42end product成品life expectancy预期寿命part replacement零部件更换ExercisesⅠ.Mark the following statements with T(true)or F (false)according to the passage.1.The purpose of preventive maintenance is to suit the needs of production.2.Different printers follow the same standards set for“the best possible condition”of their equipment.3.The more valuable equipment must be considered first in a well thought-out program.4.Regular inspection is not an important concern to the proper maintenance program.5.Like older people need more checkups,old machinery needs frequent inspections.6.The more respect shown for the equipment,the more satisfactory the end product will be.7.With regular machine adjustments,part replacement will increase.8.Regular inspections of machine adjustment will lead to cost saving.Ⅱ.Give brief answers to the following questions.1.Do people give the same time and effort to all machinery when they work out their maintenance program?2.How do people handle the equipment,which is more sensitive to losing adjustments in their maintenance program?3.How many areas of concern are there in a preventive maintenance program,and what are they?434.What part does inspection play in a maintenance program?5.Does a clean machine give the feeling of producing a high-quality product?6.How do some organizations determine the effective life of a part?Ⅲ.Match the items listed in the following two columns.1.malfunction a.state of being affected or of some specifiedtreatment2.facility b.a substance,as oil or grease,for lessening friction3.susceptibility c.occurring or appearing at regular intervals4.lubricant d.adaptation to a particular condition5.inspection e.the state or quality of anticipating the life of amechanical part6.periodic f.rigid exactness or accuracy7.adjustment g.serving to prevent or hinder8.preventive h.careful or critical examination9.expectancy i.something designed,built or installed to serve aspecific function10.severity j.failure to perform properlyⅣ.Fill in the table below by giving the corresponding translation.English ChineseLubrication schedule经常进行维修保养operator experience磨损因素end product44预期寿命part replacement耐磨损性periodic checkup设备失灵（故障）Ⅴ.Complete the following sentences by translating the Chinese given in the brackets.1.This program of preventive maintenance（尚未适应生产需要）.（suit）2.It is（厂家设备是否处在最佳状态）.（up to）3.（关于印刷设备的经常性维修保养），the company decided to hire an experienced operator to perform lubrication.（in regard to）4.More attention must be given to the new machinery（直到新机器开始工作）.（break in）5.The end product is expected to be acceptable（基于对机器故障的定期检查）.（on the basis of）6.A good organization knows the effective life of a part and（就在它磨损掉之前更换）.（wear out）45Text2AmplifierNew Words And Expressionsamplifier n.放大器active device有源器件impedance n.阻抗，电阻抗biasing n.加偏压，偏置，偏压load n.负载ratio n.比值，比率logarithmic adj.对数的decibel n.分贝quiescent adj.安静的；不活动的combination n.组合megahertz n.兆赫present n.存在conduct vt.导通modified adj.改良的，改进的sufficient adj.足够的，充分的exceed vt.超过，胜过；超出parallel adj.平行的multi-stage n.多级configuration n.配置emitter n.发射器complementary adj.互补的stable adj.稳定的，不变的screen n.幕，荧光屏cascade n.串联，级连feedback n.回授，反馈，反应stabilize vt.稳定，安定pproximately adv.近似地，大约response n.作答，回答；响应46monolithic adj.单片的，单块distortion n.畸变，歪曲，弄歪，失真symmetrical adj.对称的，匀称的non-inverting n.同相sink vi.下沉；消沉接收器resistance n.电阻，抵抗；抵制；抵抗力minimize vt.使减到最小harmonics n.谐频，谐波parameter n.参（变）数；参量ExercisesⅠ.Mark the following statements with T(true)or F (false)according to the passage.1.An amplifier is a circuit that provides gain.It receives a low-power input and generates a larger amount of power at the output without an external supply.2.An amplifier arrangement consists of some active device with biasing components,a source of power,and a load.3.In the class A amplifier,the value of bias current is either increased or decreased about its mean value by the input signal.mon emitter amplifier usually called“emitter follower”.V oltage gain just less than unity,high input impedance and low output impedance.5.The amplifiers employ negative feedback to stabilize the gain against variations in device parameters,power supply,and temperature, and to modify input and output impedance.6.Negative feedback reduces internal generated noise and gives wider bandwidth.7.A symmetrical power supply is only positive power supply.8.Distortion may occur in an amplifier as a result of non-linearity.Ⅱ.Give brief answers to the following questions.1.What are the basic functions of the amplifier?472.Why it is more convenient to express gain in logarithmic units decibel then expressions of gains as ratios?3.According to the means of the biasing arrangement and the position of the quiescent operating point,how many operation methods of amplifiers have?4.What are the amplifier configurations by using the bipolar transistor?5.What are the reasons that the amplifiers employ negative feedback?6.What is the main difference between the class A and the class B amplifier?7.What is the main reason of the distortion in an amplifier?8.What is the use of heat sink in the TDA2020IC?Ⅲ.Match the items listed in the following two columns.1.amplifier a.to change or improve something make it moreacceptable2.modify b.the return back into a system of part of what itproduces3.configuration c.firmly fixed or not likely to move or change4.stable d.an electrical device which makes sounds louder5.feedback e.the particular arrangement or pattern of a groupof related things6.distortion f.an increase in something such as size,weight oramount7.resistance g.a set of facts or a fixed limit which establishes orlimits how something can or must happen or be48done8.parameter i.the degree to which a substance prevents theflow of an electric current through it:9.gain j.in an electrical system,an electrical devicewhich takes power,or the electrical power putinto the system10.load k.the change something from its usual,original,naturalⅣ.Fill in the table below by giving the corresponding translation.Ⅴ.Complete the following sentences by translating the Chinese given in the brackets.1.The particular advantage offered by bipolar transistor amplifier is（小的输入电压可以产生较大的电压输出）.（produce）2.In the common emitter amplifier,（发射结正偏，集电结反偏）.（bias）3.The majority amplifiers employ negative feedback（用49于抵消元件参数的改变稳定放大倍数）.（stabilize）4.In the class B transistor amplifier,the transistor（只在信号半周导通，在另半周截止）.5.The amplitude distortion（是由于放大电路的非线性引起的）.（cause）50Text3Operational AmplifierNew Words And Expressionsfraction n.小部分；片断；分数millivolt n.毫伏transfer characteristic转移特性，传输特性saturate vt.使饱和offset n.偏移量potentiometer n.电位计，分压计trim out整理，修整null adj.无效力的，无效的，等于零的constant-current source恒流源complementary adj.互补的；互相补足的straightforward adj.正直的，坦率的，简单的，直接了当的drift n.漂流物，漂移diffuse vt.&vi.使（热）散开tolerance resistors容差电阻ExercisesⅠ.Mark the following statements with T(true)or F (false)according to the passage.1.the op-amp must be provided with both a positive and negative power supply2.The open loop voltage gain A vol is typically1000dB.3.The open loop voltage gain A vol is a small differential input is required to cause a small output change.4.if the inverting input is held at zero volts and the non-inverting input level made+0.1mV,then the output will go positive to nearly +10V.5.With any DC coupled amplifier the drift of the output signal mustbe kept to a high value.6.Drift is defined as any change in output voltage when the input is short-circuit or otherwise held at zero.7.Two of the major causes of drift are temperature changes causing the V BE of transistors to alter by about–2mV per℃,and power supply voltage changes.8.The voltage follower has only50%negative feedback.Ⅱ.Give brief answers to the following questions.1.what is an op-amp?2.Are the two input terminals of an op-amp the non-inverting input marked+,and the inverting input marked–.?3.what’s the typical transfer characteristic of an op-amp?4.How must the op-amp be so that the output can swing circling zero?5.what are two of the major reasons of the drift?6.what is the great advantage of the differential arrangement?Ⅲ.Match the items listed in the following two columns.1.Fraction a.An instrument for measuring an unknownvoltage by comparison to a standard voltage.2.saturate b.Forming or serving as a complement;3.offset c.One that amplifies,enlarges,or extends.4.potentiometer d.a very small piece or amount5.null e.Something that lessens or absorbs the shock ofan impact.plementary f.to fill completely7.Drift g.Having no legal force or invalid8.amplifier h.Of,relating to,situated at,or forming a limit,aboundary,an extremity,or an end.9.buffer.i.To be carried along by currents of air or water10.terminal j.to make up for or balanceⅣFill in the table below by giving the corresponding translation.English Chinesedifferential amplifier分压计transfer characteristicfeedback loop缓冲器loop voltage输入线路short-circuit闭环inverting amplifierⅤ.Complete the following sentences by translating the Chinese given in the brackets.1.Amplifiers.（对不同的电压作出反映）（…respond...to...）2.,（我们在实际生活中测量电压时）a potentiometer always occurs some“offset”.（…in practice…）3.By using a differential input stage,（两个晶体管平衡地连接在了一起）.（…be collected together…）4.In this experience,（同级信号应用到了两个输入端）.（…be applied to…）5.At this time a fraction of the output signal（…be fed back…）.（反馈到了倒相输入端）6.The output is connected back directly to the inverting input，（…in other words…）（换句话说输出端紧联着输入端）．Text4The Logic GateNew Words And Expressionsdiscrete adj.分立的，不连续的complementary adj.补充的，补足的，互补的multiplexer n.多路（复用）器，数据选择器respectively adv.各自地，分别地random logic随机逻辑mainstay n.支柱，中流砥柱integrated injection logic集成注入试逻辑电路Schottky肖特基势垒器件fan-in扇入系数，输入端数noise immunity抗干扰度，抗噪声性power consumption电力消耗，功率消耗ambient temperatures adj.周围的n.周围环境stray capacitance寄生电容，杂散电容exponentially adv.指数地，幂数地dissipation n.消散，分散，耗散，耗费propagation delay传输延迟时间，传送延迟enhancement n.提高，增强static adj.静的，静态的，静电fan-out输出，输出端数ExercisesⅠ.Mark the following statements with T(true)or F (false)according to the passage.1.Discrete component logic is nowadays very common.2.Emitter-coupled logic is available for very fast applications.3.Transistor-transistor logic(TTL)and complementary metal oxide semiconductor(COMS)families provide both small-scale integrated(SSI)devices and medium-scale integrated(MSI)devices.4.Some LSI devices employ other forms of logic that are used for the simpler circuits.5.The standard TTL logic,known as the54/74series,has a poor noise immunity and a rather high power consumption.6.The74series designed for commercial applicants and can operate at ambient temperatures of up to90℃.7.The complementary metal-oxide semiconductor or COMS logic family offers the desirable features of very low power dissipation and good noise8.Very often protective diodes are connected between the input terminals and earth to increase the possibility of the device being damaged by static charges produced by handling.Ⅱ.Give brief answers to the following questions.1.what’s the most popular logic families?2.what does The terms SSI and MSI refer to?3.why does the great popularity of this logic family arise?4.Some LSI devices employ other forms of logic that are not used for the simpler circuits.What are they?5.Does the54series primarily intend to military application?6.what does the complementary metal-oxide semiconductor or COMS logic family offer?Ⅲ.Match the items listed in the following two columns.1.discrete a.The act of dissipating or the condition of havingbeen dissipated.2.multiplexer b.Having no motion;being at rest;quiescent.3.mainstay c.Surrounding;encircling4.dissipation d.A small electronic device containing a semicon-ductor and having at least three electrical contacts,used in a circuit as an amplifier,a detector,or aswitch.5.enhancement e.Constituting a separate thing;distinct6.static f.The condition of being full of or beyond satis-faction;satiety.7.transistor g.Of,relating to,or designating a storage systemof data-processing computers in which it ispossible to store instructions or quantities inmore than one position.8.ambient h.A two-terminal semiconductor device used chie-fly as a rectifier.9.saturation i.The process of improving a computer systemby adding or replacing elements.10.diode j.A chief supportⅣ.Fill in the table below by giving the corresponding translation.English Chinese monolithic integrated circuit晶体管逻辑emitter-coupled logic微处理器output impedancecollector-emitter输出器电压protective diodesmetal-oxide semiconductor逻辑状态Ⅴ.Complete the following sentences by translating the Chinese given in the brackets.1.we talked about two subjects（前一例子是晶体管逻辑，后一例子是连接发射器逻辑）.（…the former and…the latter…）2.the use of large-scale integration devices.（已经导致了对随意逻辑更少地使用）.（…lead…to…）3.The logic family offers fairly high speed,（另外，它既经济又易于获取各种资源）．（…in a ddition…）4.The standard TTL logic,,has a poor noise immunity and a rather high power consumption.（是人们所熟知的54/74级数）（…known…as…）5.If the base current is large enough,（它会驱动T2进入饱和状态）．（…drive…into…）6.In integrated circuit,.（有的电路是串联，有的是并联）．（…in series…in parallel…）Text5Modern Control SystemNew Words And Expressionsanalogy n.类似，类推，模拟digital adj.数字的，数位的，手指的n.数字，数字式steering n.操纵，掌舵，指导hydraulic adj.水力的，水压的tactile adj.触觉的，有触觉的，能触知的n.触觉型actuator n.制动器，传动装置：制动器。
外研社新时代职业英语专业篇 电力英语PPT_U6
Practical Reading How to use the IHD
Electricity: Look at your balance and how much electricity you have
used today.
Gas: Look at your balance and how much gas you have used today.
Dual: Look at your balance and how much energy you have used today.
Message: Read important alerts.
译
History: See how much energy you have used in the last week, month
1
Practical Reading
2
Intensive Reading
3
Extensive Reading
4
Reading into China
Practical Reading
Instructions on ABC smart meters
ABC smart meters are energy meters. They can help you keep better track of the energy you have used and give you all the information you need to reduce your energy usage and save money on your bills. With ABC smart meters, you can manage your energy use better, pay your bills more easily, and you won’t have to give us a meter reading again either. You also get an In-Home Display (IHD), which lets you do lots of useful things like seeing how much energy 译 you have used, checking your balance and setting up alerts.
电力专业英语第十二讲PPT课件
Operation
Operation of a transformer is based on the fundamental characteristics of ac electrical energy. A series of causes and effects are involved, as follows:
lamination [ˌlæmɪ'neɪʃən] n. 层压，
hollow [ˈhɒləʊ] a.
; 空腹的;
pancake [ˈpænkeɪk]n. 薄饼 vt.
使平坠著陆; 使平展;
strip [strɪp]n. 去，剥去; 剥夺
; 带状地带vi. 剥光; 表演脱衣舞; 剥除;vt. 除
If the conductor is wound into a coil of many turns of wire如果导体被绕成一个多匝的线圈
the magnetic fields around the individual turns are added together to form a single, concentrated field around the coil. 单匝绕线周围的磁场被叠加在一起形 成一个在线圈周围的集中磁场。
be equal to
squared-off figure 8 8 squared正方形的；带有方格图案的;
电力系统英语课件PPT
目录
contents
Introduction to Power SystemBasic concepts of power systemPower system equipmentPower System Operation and ControlEnvironmental Protection and Energy Conservation in Power SystemsFuture Development Prospects for Power Systems
01
Introduction to Power System
Summary
Power system refers to the complete set of equipment and facilities that generate, transmit, distribute, and utilize electrical energy
Long term stability
Refers to the ability of the power system to maintain stability over a longer period of time after a disturbance, so as during restoration of service after a fault
Usage
The alternative is used in power plants, automobiles, aircraft, and other applications where it is necessary to convert mechanical energy into electrical energy
electricityPPT课件
3. 表示请求或允许做某事may 或can May I come in ? Can I open the door ?
4、must have done 也表示肯定的猜测， 意为“ 一定做过……”
They must have cleaned the room . It’s so clean .他们一定打扫过房间了， 它这么干净。
Ⅰ.用适当的情态动词填空：。
1.___C__an_____you swim? 2.We ___c_o_u_ld_n_’_t __operate the machine last week, but we can operate it now. 3.Don’t worry. You _m_a_y__ return me this book tomorrow. 4.He said if he ___c_o_ul_d___ask me another question. 5.My grandma is ill. Youc_a_n_’t__ talk so loudly here . 6.I can’t play with you. I __m_u_s_t_____finish my homework first. 7.I____m_u_s_t___ get up early tomorrow.
4. look like =be like 1. He looks like his father .= He is like his father . 2. ---- What’s he like ?=What does he look like?
实用电力英语培训课程PPT课件( 30页)
HUI REN @ NCEPU
45-15
Run advanced software using real-time information from power plants and substations.
Do fault diagnosis and identification.
• they are not replaceable by each other, and they are complementary to each other.
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• Pure science has been subdivided into the physical science, which deals with the facts and relations of the physical world, and the biological science, which investigate the history and working of life on this planet.
Regional level 地调 County level 县调
27.05.2019
HUI REN @ NCEPU
45-13
National wide grid dispatching Inter-regional connection above 500 Kv
500 Kv substation 500(330)Kv transmission lines 220 Kv key substation 220 Kv transmission lines
220 Kv substation 110Kv, 35 Kv substation 110Kv transmission lines and below
外研社新时代职业英语专业篇 电力英语PPT_U5
is monitored by advanced sensors and instrumentation technologies to
detect significant trends.
Practical Reading
Words & Phrases
Words asset n. 资产，财产 deterioration n. 恶化，退化 diagnose v. 诊断，判断 instrumentation n. 仪表 interval n. 间隔，间歇 maintenance n. 维护，养护 mitigate v. 减轻，缓和 off-peak adj. 非高峰时段的 predetermined adj. 预先决定的 premium n. 额外费用 shutdown n. （机器）停机
maintenance.
• Optimized total cost of ownership (TCO): Without maintenance,
customers and industries suffer emergency shutdown situations, which
can cause both spare parts and labor to be sold at a premium, in
Warming Up
Match the following tools (A-G) to their names.
__A___ electricity meter __C___ cutting plier __B___ test pencil ___E__ coil ___F__ safety helmet __G___ cable ___D__ universal meter
电力专业英语基础.ppt
(1)技术，先进设备直接进入电站、电厂等电力生产第一
线；
专业英语表达、听说、应变能力
电力技术的飞速发展，国际间学术交流与合作不断加强；
电力工业的迅速发展，急需一大批既懂专业，又懂英语的现代
化电力科技人才。 在自己的专业领域实际运用好英语：
掌握一定的专业英语词汇、阅读技巧； 能用英语了解电力的生产过程； 熟悉电力工业常见的英语文献等
③国际学术会议 专业英语表达、听说、应变能力
二、本教材的特点
内容选材面广，编写循序渐进，
涉及：电工基础、电子技术、电力电子技术、电 机学、计算机、电力系统、继电保护、发电厂和自 动化等内容
内容编排模块化
第一章：介绍专业英语的特点，有关的特殊语法 现象和基本句型；
第二章：22个单元，每单元包括三篇阅读材料和 一篇使用英语摘录
,
autotransformer （自耦变压器） superconductivity (超导特性) 。
(变电站，变电所) ，
次技术词汇 sub-technical words 很多专业和学科所共有的词汇,不同专业和学 科往往具有不同词义
power : 幂，乘方 动力，功率，效率 电源，电力，功率，电能
dep —department
缩略词：由词组中某些词的词头字母（有时多于 一个）所组成，作为一个词按照正常的规则发音
ROM —read only memory 只读存储器 RAM —random access memory 随机（存取）储存器 Radar —radio detecting and ranging ；雷达 GIS —gas insulated station 气体绝缘变电站
(2) 学习方面
①考研考博的需要。专业英语阅读能力
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2020/9/25
HUI REN @ NCEPU
45-19
• EMS includes the following power advanced software: Load Forecasting(负荷预测), Automated Generation Control(自动发电控制), State Estimation(状态估计), Transient Stability Analysis(暂态稳定分析), Optimal Power Flow(最优潮流), Dispatcher Training Simulator(调度员培训仿真系统)…
HUI REN @ NCEPU
45-10
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ΔΔ ~~
HUI REN @ NCEPU
Y
Y0 Δ
~
Y
Y0 Δ
~
Y0 Δ
~
Y0 Δ
~
~
45-9
Basics
• Generator • Power Transformer • Circuit breaker • Protective Relay •… • Dispatching system
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HUI REN @ NCEPU
45-16
Power Dispatching
• Dispatching regulation on power system: issued in 1993 by State Council.
• Unified dispatching and hierarchical management: five levels.
• Phase voltage 相电压, line voltage 线电压 • Active power（real power）有功功率 • Reactive power 无功功率
2020/9/25
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~
2020/9/25
Basics
Y0 Y
Δ
Y0 Y
Δ
Y0 Y0
management and dispatching decision to
ensure safety and economical operation of
power system. Sometimes it is also called EMS (Energy Management System)(能量管理 系统)
500 Kv substation 500(330)Kv transmission lines 220 Kv key substation 220 Kv transmission lines
220 Kv substation 110Kv, 35 Kv substation 110Kv transmission lines and below
电力专业英语
45-1
Power System Introduction
Power dispatching
电力系统调度
voltage
current
active power
reactive power
status of circuit breakers
Status of protective relays ……
Medium and small scale plants
Distribution center High voltage customers
45-18
• Power dispatching automation system(调度自 动化系统). The task is providing to operators(调度员) all various kinds of real time information of power system, making
• The basics of these advanced software is SCADA
system.
2020/9/25
HUI REN @ NCEPU
45-20
• The generator voltages are in the range of 11 to 30kV; higher generator voltages are difficult to obtain because of insulation problems in the narrow confines of the generator stator.
National level 国调 Branch-grid level 网调 Provincial level 省调
Regional level 地调 County level 县调
2020/9/25
HUI REN @ id dispatching Inter-regional connection above 500 Kv
2020/9/25
National level Branch-grid level Provincial level
regional level County level
HUI REN @ NCEPU
Operation management of related large-scaled plants Coordinate economic operation of various branch grids Large-scaled plants
2020/9/25
HUI REN @ NCEPU
45-2
2020/9/25
HUI REN @ NCEPU
45-3
2020/9/25
HUI REN @ NCEPU
45-4
2020/9/25
HUI REN @ NCEPU
45-5
2020/9/25
HUI REN @ NCEPU
45-6
2020/9/25
HUI REN @ NCEPU
45-7
Basics
• DC/AC 直流/交流 • Voltage 电压 • Voltage level 电压等级
▪ 110v, 220v, 380v, ▪ 3kV, 6kV, 10kV, 20kV, 35kV ▪ 110kV, 220kV, 330kV, 500kV, 750kV, 1100kV