Power System Control & Stability

<p>Power system is defined as a network of one or more generating units loads and power transmission lines including the associated equipment connected to it. The stability of a power system is its ability to develop restoring forces equal to or greater than the disturbing forces to maintain the state of equilibrium. Power system stability problem gets more pronounced in case of interconnection of large power networks. The tendency of a power system to develop restoring forces equal to or greater than the disturbing forces to maintain the state of equilibrium is known as stability. Stability denotes the ability of an electric power system for a given initial operating condition to regain a state of operating equilibrium after being subjected to a physical disturbance with most system variables bounded so that'system integrity is preserved.</p>