要是没有变压器来调节电压，远距离输送电力是不可能的。
Were there no transformers to switch the voltage, long-distance transmission of electricity would be impossible?
变压器的功用就是把电力从一种电压改变为加一种电压。
The function of the transformers is to change electric power from one voltage to another.
它是以这种电压馈入电力网。
电力系统电压稳定性是一个具有挑战性的问题。
在电力系统中，变压器是实现电压变换、电能传输和分配的关键设备。
Transformer is the key instrument for voltage converting, power transmission and distribution in power system.
频率和电压是电力系统中的两个重要电气量。
Both frequency and voltage are important electric parameters in power system.
电力系统的电压骤降问题值得关注。
电力系统进行分级电压控制的首要问题就是对系统进行控制区域的划分。
The first question of power system classification voltage control is partition of control area.
因此，电力系统无功电压管理工作也成为电网自动化调度的一个重要环节。
Therefore, the reactive power and voltage management is an important link in power auto-dispatching.
准确获得电网电压的相位角，在电力电子装置设计中有重要的意义。
To obtain the phase of line is important in the design of power electronic equipments.
电流、电压是电力系统的基本物理量。
Current and voltage are elementary parameters in power system.
电工每天都有很多事情与电流、电压、电阻以及电力打交道。
Electricians have a lot to do with current, voltage, resistance and power every day.
一种高速电力系统过电压在线监测系统的开发。
Development of a high speed on-line monitoring device for overvoltage in power system.
无功电力是影响电压质量的一个重要因数。
Reactive power is an important factor that exerts great influence on quality of voltage.
电磁式电压互感器是电力系统测量电压的主要装置。
The magnetic type PT is the primary equipment for measuring the voltages in power system.
本文给出了交流电力测功器的变频装置的一种结构，交-直电压源型变流器。
In this paper, the structure of A-C dynamometer's inverters has been given.
电压箱放置于户外，其中包括美国UL认证的电力供应。
The boxes are outdoor-rated and include a UL-approved power supply.
电压箱放置于户外，其中包括美国UL认证的电力供应。
The boxes are outdoor-rated and include a UL-approved power supply.
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