电力专业英语阅读与翻译部分课后长句

第一章

第一节电力系统基本结构

Part 1 Basic Construction of Electric Power System Basic Concepts of Electric Power System

电能是一种理想的能力形式，便于传输和使用，而且很清洁，对环境和大气无污染，因此自被发现以来，电能发展迅速并且利用广泛。电能的

产生、输送和消耗过程就在这一被称为电力系统的整体化系统中实现。

Electricity is an ideal energy form, which is convenient to deliver and use, and is clean without polluting our environment

and atmosphere. The generation, delivery and consumption of electricity are realized in an integrated system which is called

electric power system or power system.

一个电力系统包括三个基本部分：发电系统、输电系统和配电系统，如图1-1所示。

An electric power system consists of three principal divisions: power generation, power transmission system, and power

distribution systems, as shown in Fig.1.1

图1-1电力系统的三个基本部分

用户从电力系统取用的所有电能都是在某种形式的电厂（或者称作电站）中产生的。发电是整个电能利用过程的第一环节。

All the electricity the consumers take from the power system is generated in a power plant, or called power station, of some

kind. Power generation is the first stage of the whole progress of the utilization of electric energy.

输电系统连接发电和配电系统，并经过网络互连通向其他电力系统。配电系统在执行电压变换和开关功能的变电站将所有单个负荷接连到输电

线路。

Transmission systems are the connecting links between the

generation plants and the distribution systems and lead to other

power systems over interconnections. A distribution system connects all the individual loads to the transmission lines at the

substations which perform voltage transformation and switching functions.

地处负荷区的附近的小型电厂，通常直接连接到中压输电系统或配电系统。

Small generating plants located near the load are often connected to the subtransmission or distribution system directly.

通常，在输电系统水平上形成相邻电力系统间的互联。 Interconnection to neighboring power systems are usually formed at the transmission system level.

因而整个电力系统包括多个电源和若干层次的输电网络。这提供了高度的结构化冗余，使系统能够承受罕见的意外事故而不会中断对用户的供

电。

The overall system thus consists of multiple generating sources and several layers of transmission networks. This provides a

high degree of structural redundancy that enables the system to withstand unusual contingencies without service disruption to

the consumers.

第二节 电力系统典型的网络拓扑结构

Part 2 Typical Topologies of Electric Power System

构成电力系统的设备，其布局取决于当地的负荷增长方式，并且随时可能重新调整。

The equipments which form an electric system are arranged depending on the manner in which load grows in the area and may be

rearranged from time to time.

然而，也可以采取办法对系统进行分类。以下列举三类：辐射状系统、环状系统和网状系统。

However, there are certain plans into which a particular system design may be classified. Three types are illustrated: the

radial system, the loop system and the network system.

如图1-2所示，在辐射系统中，线路从电源呈树状向外延伸。打开任一段线路都会导致一个或多个负荷停电。

In a radial system, as shown in Fig. 1.1, the lines form a “tree” spreading out from the power source. Opening any line

will result in interruption of power to one or more of the loads. 环状系统如图1-3所示。这样接线，即使一条线路退出运行，仍能保证给所有负荷供电。

The loop system is illustrated in Fig. 1.2. With this arrangement all loads may be served even though one line section is

removed from service.

图1-4所示的是同样的负载由网状方式供电。这样设计，保证了每个负荷有两条或多条线路为其供电。

Fig. 1.3 shows the same loads being served by a network. With

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