求帮助写篇英语文章 Electric Power system题目 第一句是Electric Power is a most convenient clean safe
范文：
Electric Power is a most convenient clean safe.And electric power system is a network of electrical components used to supply，transmit and use electric power.
电力是最方便、清洁、安全的。而电力系统是用于供电、传输和使用电力的电气元件网络。
An example of an electric power system is the network that supplies a region’s homes and industry with power — for sizable regions，this power system is known as the grid and can be broadly divided into the generators that supply the power.
电力系统的一个例子是为一个地区的家庭和工业提供电力的网络相当大的地区，这种电力系统被称为网格，可以大致分为供应电力的发电机。
the transmission system that carries the power from the generating centres to the load centres and the distribution system that feeds the power to nearby homes and industries.
产生的传输系统，携带能力中心的负荷中心和分布系统源附近的住宅和工业的力量。
Smaller power systems are also found in industry, hospitals, commercial buildings and homes. The majority of these systems rely upon three phase AC power the standard for large scale power transmission and distribution across the modern world.
在工业、医院、商业建筑和家庭中也可以找到较小的电力系统。这些系统中的大多数依赖于三相交流电源，这是现代世界大规模输电和配电的标准。
范文：
Electric Power is a most convenient clean safe.And electric power system is a network of electrical components used to supply，transmit and use electric power.
电力是最方便、清洁、安全的。而电力系统是用于供电、传输和使用电力的电气元件网络。
An example of an electric power system is the network that supplies a region’s homes and industry with power — for sizable regions，this power system is known as the grid and can be broadly divided into the generators that supply the power.
电力系统的一个例子是为一个地区的家庭和工业提供电力的网络相当大的地区，这种电力系统被称为网格，可以大致分为供应电力的发电机。
the transmission system that carries the power from the generating centres to the load centres and the distribution system that feeds the power to nearby homes and industries.
产生的传输系统，携带能力中心的负荷中心和分布系统源附近的住宅和工业的力量。
Smaller power systems are also found in industry, hospitals, commercial buildings and homes. The majority of these systems rely upon three phase AC power the standard for large scale power transmission and distribution across the modern world.
在工业、医院、商业建筑和家庭中也可以找到较小的电力系统。这些系统中的大多数依赖于三相交流电源，这是现代世界大规模输电和配电的标准。
Electric Power and Power System Electric power is a most convenient clean safe and useful form of energy which supplies the major portion of energy needs of a modern society. At the present time the lack of electricity a blackout is newsworthy. Electric power is so vital to the lives of people that its unavailability causes inconvenience loss of production and danger to many individuals who are in operation in hospitals. A prolonged blackout which is inevitable when a growing load is combined with no generation additions could lead to social disorder and even national tragedy. Electric power is generated in power generating stations plants or simply known as power stations plants. Power generation means conversion of energy from a primary form to the electrical form. The current sources of nearly all the electrical energy generated come from: the conversion of chemical energy of fossil fuels nuclear fission energy and the kinetic energy of water which is allowed to fall through a difference of elevation they are referred to as fossil-fired power nuclear power and hydro power respectively. The voltage is usually transformed to a high level at the power plant and then via high voltage or extra-high voltage transmission lines the electric power is transmitted to general power consumption areas load areas. Electric power is transmitted at high voltage level either because of the distance or because of the amount of power or because of their combination. Before electric power is delivered to the electric power consumers or users there may be more voltage transformations. First at primary substations the voltage is reduced and then transmitted to local substations via subtransmission lines. Then another voltage reduction is experienced in local substations and the electric power is delivered to the power consumers loads via distribution systems. In distribution system electric power is directly delivered to electric users via feeders. Thus the entire system consisting electrically of power stations substation power consumers transmission lines and feeders is called a power system. In functional terms a power system includes power generation power transmission power transformation power distribution and power utilization. The connection between the power stations and loads is not a simple path but a complex network. The electric power utilities will plan design build and operate their power systems.
The Characteristics of Electric Power The electric power has unique technical characteristics which give the power industry certain unique business characteristics. a. Intangibility n.. The customer cannot directly detect a kilowatt-hour with any of his physical senses. The result of the kilowatt-hour of service light heat work output from a motor can be detected and for this he is willing to pay. Devices called kilowatt-hour meters are used to measure this intangible electrical energy delivered to customers. b. Quality. Although electricity is intangible it can be measured in amount and quality. The quality of service can be measured by service continuity or reliability uniformity n. of voltage at the proper level proper and uniform frequency of the alternating voltage. Also the shape of the voltage-time curve and its smoothness or wave shape is a measure of quality. c. Product storage. Unlike most businesses the electric power utility must create its product simultaneously with its use because there is no storage of electricity. The storage battery has chemical not electrical storage but the production of large blocks of power by chemical action so far is both technically and economically unsatisfactory. This simultaneous generation and transmission with use requires power system capacity to meet the load demand at whatever moment it occurs. Thus a maximum or peak demand of only a moment’s duration requires that the necessary equipment be in place throughout the entire year. d. Responsibility for power service. Because the utility delivers its product to the customer’s premises it must assume responsibility for the safe and reliable delivery of its product. The necessary transmission and distribution lines must be available and kept in service or promptly returned to service after interruption despite wind lighting ice kites and so on. e. Public safety. Electricity is a very useful servant when it is kept under control however it can be very destructive if control is lost because it can shock burn and kill. The utility must provide reasonably adequate protection for the public and its own skilled workers. Of the characteristics of electric power the primary concern of the electric power system engineers is to maintain a constant operating frequency. This job is normally assigned to an automatic control system that maintain at all times real power balance in the system. A mismatch in real power results in a frequency deviation n. . The next most important job is to maintain a proper profilen.throughout the system. This is accomplished by proper flows of reactive power on the various lines.
这是某处的一篇课文，你可以改写一下。
出处在哪？
英语问题：electric和electrical有什么区别？~
electric
AHD:[?l他搕r策]
D.J.:[i6lektrik]
K.K.:[!6lWktr!k]
adj.
Alsoelectrical
AHD:[-tr?k卨]abbr:elec.
Of, relating to, or operated by electricity:
electric current; an electrical appliance.
Emotionally exciting; thrilling:
gave an electric reading of the play.
Exceptionally tense; highly charged with emotion:
an atmosphere electric with suspicion.
electric
n.
An electrically powered machine or vehicle:
The lawn mower is an electric.
New Latin 秎ectricus[ deriving from amber, as by rubbing ]
fromLatin 秎ectrum[ amber ]
fromGreek 秎ektron
elec搕rically adv
electric
AHD:[?l他搕r策]
D.J.:[i6lektrik]
K.K.:[!6lWktr!k]
adj.
Alsoelectrical
也作electrical
AHD:[-tr?k卨]abbr:elec.
Of, relating to, or operated by electricity:
电流电的，与电有关的或由电驱动工作的：
electric current; an electrical appliance.
电流；一个电器
Emotionally exciting; thrilling:
令人兴奋的让人情绪激动的；刺激的：
gave an electric reading of the play.
朗读这个剧本，效果象电刺激一样
Exceptionally tense; highly charged with emotion:
非常紧张的情绪紧张的；充满情绪的：
an atmosphere electric with suspicion.
充满悬念的气氛
electric
n.
An electrically powered machine or vehicle:
电动机器或车辆：
The lawn mower is an electric.
割草机是电动的机器
New Latin 秎ectricus[ deriving from amber, as by rubbing ]
现代拉丁语 秎ectricus[ 派生于琥珀，如摩擦琥珀 ]
fromLatin 秎ectrum[ amber ]
源自拉丁语 秎ectrum[ 琥珀 ]
fromGreek 秎ektron
源自希腊语 秎ektron
elec搕rically adv
electric
源自拉丁词electrum 琥珀。最初，电是摩擦琥珀而产生的
[I5lektrIk]
adj
电的，用电的，发电的
an electric spark
电火花
an electric cooker
电炊具
This heavy freighter is driven by two electric motors.
这辆重型运输汽车是由两台电动机驱动的。
电力产生的
惊人的；令人兴奋的
an electric eloquence
惊人的口才
"The president's speech had an electric effect on the crowd, and the students all cheered him."
"校长的演说震撼人心,大学生们都向他欢呼。"
electric
n
(pl)
电器
electric
[I5lektrIk]
adj.电的, 导电的, 电动的, 电气
Electric
Electric Power Research Institute
http://www.epri.com
提供了高品质的技术，网页上有其产品、计划及出版品。
General Electric
http://www.ge.com
拥有各式各样的技术、产品制造及服务，市场包括了飞机引擎、广播业、配电设备、发动机及工业系统、电力系统等。
electrical
[I5lektrIk(E)l]
adj
与电有关的
The cooker isn't working because of an electrical fault.
这个炊具不能用了，因为出了电气方面的故障。
用电的
electrical apparatus
电器
electrical
[I5lektrIk(E)l]
adj.电的, 有关电的
我是这么区分的
electric：电的，电力的，电动的。你可以理解成“用电的”，都是跟我们平时所说“发电”的“电”是相关的。
electronic：电子的。世面上很多电子产品。当然不能说成用电的产品啦
那这么一来，electronic lamp也就不能这么用了。
个人看法。。。
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