1Model Predictive Control based Real Time Power System Protection Schemes

Abstract—The objective of power system controls is to keep the electrical flow as well as voltage magnitudes within acceptable limits in spite of the load and network topology changes. The con-trol of voltage level is accomplished by controlling the production, absorption as well as flow of reactive power at various locations in the system. This paper presents an approach to determine a real time system protection scheme for maintaining voltage stability following the occurrence of a contingency by means of reactive power control. This approach is based on the Model Predictive Control (MPC) theory. According to an economic criterion and control effectiveness, a control switching strategy consisting of a sequence of amounts of the shunt capacitors to switch is identified for voltage restoration. The effect of the capacitive control on voltage recovery is measured via trajectory sensitivity. This approach is applied to the WECC system to enhance the performance of voltage and to the 39 bus New England system for preventing voltage collapse. Index Terms—Model predictive control, trajectory sensitivity, voltage stabilization, switching control, power system I