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Applying the 1pps signal of the Universal Time Coordinated (National Time Service Center) (UTC(NTSC), as the reference signal, the parameters of the voltage-controlled crystal oscillator (VCXO) are estimated by using the Least Square and the frequency adjustment amount of the VCXO is calculated, so that the VCXO is adjusted properly and so as to make the VCXO get the better accuracy and the long term...
The effectiveness of using lead-lag compensation for offsetting the long time delay of wide area signals is analyzed in this study. Time domain simulations of a nonlinear system are used to obtain the parameters of a wide area damping controller (WADC) via particle swarm optimization with a performance of integral of the time-weighted squared error. A four-machine, two-area system is used to test...
Algorithms for wide area control of an excitation system are presented. The algorithms use a switched control method with speed feedback from a remote generator, and also account for communication delays. They can also reduce the negative effects of time delay. The wide area controller includes a lead-lag network. Simulation results show that the algorithms can improve the dynamic stability of an...
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