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Static frequency converter couples US paper mill's 25-HZ and 60-HZ electricity grids

机译:静态变频器将美国造纸厂的25-HZ和60-HZ电网耦合

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Before 60 Hz was adopted as the standard frequency for electrical distributionin the USA, power companies across the nation had traditionally operated with a frequency of their own choosing. In Pennsylvania, for example, 25 Hz was widely used, and even today there are a large number of power networks still operated as 25-Hz "islands". Only recently, as modern static frequency converters have come onto the market, has it become possible to exchange energy between these networks and the 60-Hz grid, without maintenance intensive and less efficient motor generator sets.
机译:在美国以60 Hz作为配电标准频率之前,全国范围内的电力公司传统上都是以自己选择的频率运行。例如,在宾夕法尼亚州,广泛使用25 Hz,直到今天,仍然有大量的电力网络仍在以25 Hz的“孤岛”运行。直到最近,随着现代静态变频器投放市场,才有可能在这些网络和60 Hz电网之间交换能量,而无需进行维护密集且效率较低的电动发电机组。

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