On line predicting obtaining power system post disturbances steady frequency is beneficial for frequency stability assessment and emergency control.
在线预测系统扰动后的稳态频率，有利于扰动后系统频率稳定性评估和紧急控制。
2
High frequency pulse width modulation powercontrol systems can be realized using semiconductor switches.
高频脉冲宽度调制电力控制系统，可以实现用半导体开关。
3
Using computer control, man-machine dialogue mode, the completion of the powerfrequency voltage breakdown of insulation media, power frequency withstand voltage test.