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The ac power stabilizer proposed here has a simple construction and high performance.
In order to achieve the above goal (e. g., a constant-voltage and constant-frequency AC voltage), a proper control should be employed.
Simulation results on a practical power system demonstrate that the proposed stabilizer is effective in damping low-frequency oscillations as well as improving system dynamic stability and voltage profile.
This is in contrast to the case with conventional automatic voltage regulator and power system stabilizer where performance varies widely with the operating situation and can even cause system instability.
Results of the experimental studies show that the proposed adaptive stabilizer outperforms the conventional stabilizer.
This system can compensate for undervoltage, overvoltage and voltage unbalances produced by the AC mains.
It was concluded that the voltage control via voltage stabilizer is effective to improve stability, especially in heavy load conditions.
Voltage instability following disturbances under very weak AC-system conditions can also be avoided.
The experimental results show better performance of the excitation system with the proposed stabilizer compared to the system with a conventional PI voltage controller and PSS2A stabilizer.
The efficiency of the best new voltage stabilizer presented in this paper will exceed the ones previously published significantly.