The invention relates to a closed-
loop control method for achieving active power adjustment by introducing
frequency deviation feedback to have control over
voltage, and an obtaining method of an optimal feedback
gain parameter in the closed-
loop control method. According to the closed-
loop control method for achieving active power adjustment by introducing the
frequency deviation feedback to have control over the
voltage, due to the facts that an isolated
power grid has the characteristics that the active power adjustment capacity is not sufficient, and a special load characteristic of a rectification load exists, the load power is adjusted through a method for adjusting
voltage of a
load bus, and the
frequency deviation is introduced into an excitation
regulator to serve as feedback input, a voltage closed-loop control method based on frequency information is achieved. Unbalanced power which exists after a
system fault happens is distinguished through a WAMS
system in an on-line mode, and a WAMS voltage closed-loop control optimal feedback
gain parameter is calculated in an on-line mode on the basis of the load characteristic and a voltage sensitivity method and in the mode that the primary frequency adjustment capacity of a
generating unit is taken into account. The effectiveness of the obtaining method of the optimal feedback
gain parameter and the effectiveness of the closed-loop control method for achieving active power adjustment by introducing frequency deviation feedback to have control over the voltage are verified through RTDS
simulation.