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1、电力系统专业英语 山东交通学院电气系 张建军 词汇 intercept ntsept n. 截流 截击; 拦截，拦住; 截球; 拦阻; intercept valve 截流阀，再热调节汽门 divert dav:t v. 转换 ;娱乐; 转移注意力 steam chamber 蒸汽养护室 crossover krsv(r)n. 转换器;天桥; 生 （杂色体的） 杂交，交换; 铁路 岔道，转线路; （交搭胸前的）女围巾; megawatt n. 兆瓦MW synchronous skrnsa. 同步的，同时的;同时存在发生的 implement mplmentv. 完成，补充;实施，执行; 使生
2、效，实现; 落实; （政策） 把填满; supplement splmntv. 补充，添加;增补; 补充物; 增刊，副刊; supplementary a. 补充的 armature :mt(r) n. 电枢;衔铁; 转子; 支架; torque t:k n. 转矩; 扭转力; damp v. 阻尼，减振 bond n. 联接 deceleration n. 减速 rectify rektfa v. 整流改正，校正; 化 精馏; thyristor arst n. 晶闸管，硅可控整流器 课文内容 Basic Components of an Electric Power Plant The b
3、asic components of an electric power plant may be schematically shown as in Fig.4-1. In the figure, the turbine and governor with a speed feedback are shown on the left, the generator SG, exciter EX, and voltage regulator VR with a voltage feedback Vt are shown in the middle, and the transformer and
4、 transmission line are shown on the right. The basic components基本设备 the turbine and governor with a speed feedback 带有速度反馈的汽轮机和发电机 exciter励磁器; 激励器; 励磁机 The Steam Turbine The steam-mechanical energy conversion is a thermodynamic process by which the steam is expanded through the high-, medium-, and lo
5、w- pressure turbines, normally all on one shaft. High- pressure and high-temperature steam energy from a boiler is converted into mechanical energy through the turbine blades, and transmitted to the shaft. The steam-mechanical energy conversion蒸汽中能量 与机械能的转换 thermodynamic process热动过程 Shaft转轴 turbine
6、blades汽轮机叶片 There are other important parts of the turbine: the control valves, which control the steam input; the intercept valves, which can be used to divert the steam from the high-pressure turbine directly to the steam condenser; control valves 控制阀; 调节阀 ; intercept valves 截流阀，再热调节汽门 divert转换 di
7、vert the steam from the high-pressure turbine directly to the steam condenser引 导蒸汽由高压汽轮机直接进入凝汽器 the steam chamber in front of the high-pressure turbine, which causes a time delay of the steam flow; the reheater between the high-and medium-pressure turbines, which causes another time delay; and the c
8、rossover connection between the medium-and low- pressure turbines, which causes still another time delay of the steam flow. Many other types of steam turbines are in use. the steam chamber蒸汽室 a time delay一个延时 Reheater再热器 crossover n. 转换器 The Governor The function of a governor of an electric power p
9、lant is to maintain a constant speed, usually the synchronous speed of the turbine-generator set. A speed drop of the set due to an increase of electric power output will send the speed signal to the governor to increase the mechanical power input to the turbine(s), and a speed rise to decrease the
10、mechanical input, maintaining a constant speed. Governor调节器;调速器 usually the synchronous speed of the turbine-generator set 通常是配套汽轮机与发电机的同步转速 The governor of the major plant of a power area or subsystem is also given the function of power and frequency control of the area in a large interconnected el
11、ectric power system. The governor responds not only to the scheduled electric power interchange among areas, but also to the change in system frequency due to local load variations. The governor of the major plant of a power area or subsystem 区域或地区电力系统主电站的调速器 in a large interconnected electric power
12、 system在一个 大的电网系统 the scheduled electric power interchange计划的电能 交换 local load variations当地负荷的变化 Another use of the governor is to implement a supplementary governor control to improve the stability of an electric power system. There are two types of governors for both steam power and hydropower plan
13、ts: the mechanical- hydraulic governor and the electric-hydraulic governor. implement a supplementary governor control实现调 速器的辅助控制 improve the stability of an electric power system改善 电力系统的稳定性 the mechanical-hydraulic governor 机械液压调 速器 the electric-hydraulic governor电动 液压调 速器 The Synchronous Generator
14、 The mechanical-electric energy conversion takes place in an electric generator, usually of the three- phase synchronous type, and is based on Faradays induction law. The essential components are (1) an armature winding, (2) a magnetic field, and (3) a mechanical energy input, in the form of a force
15、 or a torque, which causes a relative motion of the armature winding with respect to the field. The Synchronous Generator同步发电发电 机 The mechanical-electric energy conversion 机械能和电能的转换 in the form of a force or a torque以力或力矩的形式 with respect to关于；相对于； One must note that whenever there is a voltage induc
16、ed in the generator armature winding due to its relative motion with respect to the magnetic field, there is also an electric torque opposite to the mechanical torque of the prime mover when the generator has a load. One must note有一点必须要指出的是 an electric torque一个电磁转矩 opposite to the mechanical torque of the prime mover 与原动机的机械转矩相
