With ongoing system restructuring, continuous change of dynamics/load and operating conditions, the uncertainty
issue in electrical power system operation and control has increasingly become a challenge. Load frequency control is a
challenging problem for utilities and needs to be maintained under slandered operating conditions despite the alteration in load
demand or an imbalance between generation and load. It degrades the power system performance and even stability, which
cannot be described in conventional transient stability and voltage stability studies. In the last two decades, many studies have
focused on damping control and voltage stability and related issues, but there has been much less work on the power system
frequency control analysis and synthesis.
