哪位大哥给翻译下一段英语文章?
发布网友
发布时间：2022-04-22 05:42
共2个回答
热心网友
时间：2024-07-03 17:16
The能源厂同时导致三个不同阶段交流电能，并且三个阶段被抵销从彼此的120度。 有从每个能源厂出来的四根导线： 三个阶段加上中性或地面共同到所有三。 如果您将看在图表的三个阶段，他们如下所示:相对地面：
There是没什么不可思议关于三相力量。 它是完全120度同步和抵销的三单相。
Why三个阶段？ 为什么没有一两或四？ 在1阶段和两阶段力量，当正弦波横渡零的伏特时，有120片刻每秒。 在三阶段力量，三个阶段之一在任何指定的时刻临近峰顶。 大功率的三阶段象三阶段焊接器材的马达(用于工业应用)因此和事有甚而功率输出。 四个阶段不会极大改进事，而是增加第四根导线，很三阶段是自然安定的点。
And怎么样这“地面”，如上所述？ 电力公司本质上使用地球作为其中一根导线在动力系统。 地球是一个相当好指挥，并且它是巨大的，因此它做电子的一条好返回途径。 (汽车制造商做相似的事; 他们使用汽车的金属身体作为其中一根导线在汽车的电气系统并且附有电池的负极车身。) “地面”在功率分配栅格逐字地是“是所有在您附近的地面”，当您走外面时。 它是土、岩石、地水等等，地球。
Transmission分站
The三相力量留下发电器并且在能源厂进入传输分站。 这个分站使用大变压器转换在级数以万计的伏特)的发电器的电压(由极端长途传输的高电压决定在传输栅格。
能源厂的A典型的分站
You能看到在后面离开分站的几个three-wire塔。 长途传输的典型的电压是在155,000到765,000伏特范围内为了减少线路损失。 一个典型的最大传输距离是大约300英里(483 km)。 当您看他们时，高压送电线是相当显然的。 他们通常由象这样的巨大的钢塔做成：
All象这样的力量塔有三个阶段的三根导线。 许多塔，象显示的那个以上，有额外导线跑沿塔的上面。 这些是接地导线并且主要在那里为吸引闪电。
热心网友
时间：2024-07-03 17:16
The power plant proces three different phases of AC power simultaneously, and the three phases are offset 120 degrees from each other. There are four wires coming out of every power plant: the three phases plus a neutral or ground common to all three. If you were to look at the three phases on a graph, they would look like this relative to ground:
There is nothing magical about three-phase power. It is simply three single phases synchronized and offset by 120 degrees.
Why three phases? Why not one or two or four? In 1-phase and 2-phase power, there are 120 moments per second when a sine wave is crossing zero volts. In 3-phase power, at any given moment one of the three phases is nearing a peak. High-power 3-phase motors (used in instrial applications) and things like 3-phase welding equipment therefore have even power output. Four phases would not significantly improve things but would add a fourth wire, so 3-phase is the natural settling point.
And what about this "ground," as mentioned above? The power company essentially uses the earth as one of the wires in the power system. The earth is a pretty good conctor and it is huge, so it makes a good return path for electrons. (Car manufacturers do something similar; they use the metal body of the car as one of the wires in the car's electrical system and attach the negative pole of the battery to the car's body.) "Ground" in the power distribution grid is literally "the ground" that's all around you when you are walking outside. It is the dirt, rocks, groundwater, etc., of the earth.
Transmission Substation
The three-phase power leaves the generator and enters a transmission substation at the power plant. This substation uses large transformers to convert the generator's voltage (which is at the thousands of volts level) up to extremely high voltages for long-distance transmission on the transmission grid.
A typical substation at a power plant
You can see at the back several three-wire towers leaving the substation. Typical voltages for long distance transmission are in the range of 155,000 to 765,000 volts in order to rece line losses. A typical maximum transmission distance is about 300 miles (483 km). High-voltage transmission lines are quite obvious when you see them. They are normally made of huge steel towers like this:
All power towers like this have three wires for the three phases. Many towers, like the ones shown above, have extra wires running along the tops of the towers. These are ground wires and are there primarily in an attempt to attract lightning.
