这种控制器不依赖于被控系统的模型，采用当地信号实现控制，结构简单。

The controller does not depend on the model of power system. Using a local signal to realize its control, the structure of this controller is very simple.

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所设计的控制器能实现当地信号控制，并对系统运行点和网络结构的变化具有很强的鲁棒性。

The controllers designed can achieve the local control and possess good robustness when the working point and the structure of the system are changing.

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音响质量会非常差，部件必须挨得很近，接收器只能接收当地广播电台的强功率信号，还会存在其他质量问题。

The sound quality would be poor, components would have to be located very close together, the receiver could only pick up strong local broadcast stations, and still more quality issues.

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