Not only high power factor synchronous motor, and its speed is independent of the load, depends only on grid frequency.

同步电动机不但功率因数高，而且其转速与负载大小无关，只决定于电网频率。

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Wind turbine generators have relatively large influence on grid frequency when they start up and are connected to the power grid.

当风力发电机组在额定风速启动并网时，对电网频率的影响较大。

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Wind turbine generators have the biggest influence on grid frequency when the generators trip and exit the power grid at rated active output power.

当风力发电机组在额定输出有功功率跳闸退出电网时，对电网频率的影响最大；

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The minister said the exact reason for the collapse had not yet been pinpointed but, in the summer, "states try to take more power from the grid" and at the time of the collapse, the grid frequency was "above normal".

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Grid Friendly Appliance Controller: Developed at the Pacific Northwest energy Laboratory, the Grid Friendly Appliance controller senses grid conditions by monitoring the frequency of the system and provides automatic demand response in times of disruption.

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Phasor measurements track the amount of stress placed on the electric power grid by providing granular data about frequency, voltage and phase angle conditions in real-time.

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