Nowadays  advanced controller design is called upon to guarantee the secure and reliable operation of power systems To meet this requirement  this work proposed three control strategies: 1) robust coordinated transient stability and voltage regulation enhancement (CTSVRE) control of generator excitation systems  which enhances both transient stability and post-fault voltage regulation  2) robust coordinated control of AC/DC power systems with overlapping decomposition  which coordinates both AC system control and DC system control from a systematic standpoint  3) robust constrained control of generator excitation systems  which considers input saturation from the beginning of controller design