A REAL-TIME CLOSED-LOOP CONTROLLER FOR SECURITY DISPATCH

The objective of the proposed controller is to ensure that the system is always in a secure state with no system component being overloaded, even under changing load conditions. In addition the controller ensur es that the conventional requirements such as Automatic Generation Con trol (AGC) and Economic Load Dispatch (ELD) are met. The controller ma kes use of the system measurements obtained through Supervisory Contro l and Data Acquisition (SCADA) systems and evaluates incremental chang es to the control variables as and when necessary. The incremental cha nges are such that the system operating state will move towards the op timal state in which the objectives of the controller are achieved. Un like the conventional Optimal Power Flow (OPF) methods which inherentl y solve the power system model to determine the optimal operating poin t, the proposed controller solves only a set of controller equations. The scheme is implemented for real power dispatch and is tested for it s efficacy on a dynamic power system simulator.